20243E00
Short Description
design layouts and safety spacing agip specifications...
Description
COMPANY SPECIFICATION
ONSHORE INSTALLATIONS
DESIGN LAYOUT AND SAFETY SPACING
20243.VON.SAF.SDS.
Rev. 0
May 1996
0 R E V.
EM ISS ION DE SCRIP TION
S TIN CO M P .
S ICI VE RIF .
ST IN A PP R .
15.5.96 D AT E
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 2
FOREWORD
Rev. 0
Total sheets 71 May 1996 Emission
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 2
FOREWORD
Rev. 0
Total sheets 71 May 1996 Emission
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 3
CONTENTS 1.
G ENERA L
1.1
S cop e
1.2
Normative references
1 . 2 .1 1.2. 1.2.2 2 1 . 2 .3 1 . 2 .4 1 . 2 .5
European no normative re references Norm Normat ativ ivee ref refer eren ence cess of of ISO ISO,, IEC IEC and and nati nation onal al orga organi niza zati tion onss Nor Normat mative re refere erences of of ot other organizati ations Legislation Internal no normative re references
2.
FUNCTIONAL NORMATIVE REQUIREMENT
2.1
Definitions
2.2
O perative environm ent
2.3
Safety requirements for the layout
2 . 3 .1 2 . 3 .2 2 . 3 .3 2 . 3 .4 2 . 3 .5 2 . 3 .6 2 . 3 .7 2 . 3 .8 2 . 3 .9 2.3. 2.3.10 10
Process and utility units Safety main units “Critical” plant units Process piping and vents Clearances Divisions Outer installations and radiation Control systems Es cape ways Clas Classi sifi fica cati tion on of area areass wit with h expl explos osio ion n haza hazard rd
2.4
Safety requirements for spacing
2 . 4 .1 2 . 4 .2 2 . 4 .3 2 . 4 .4 2 . 4 .5 2 . 4 .6
S a f e t y s pa c i n g General requirements Fe nce s Hydrocarbons st storage ta tanks Hydrocarbons loading bays Well heads
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 4
2.4.7 2.4.8 2.4.9 2.4.10 2.4.11 2.4.12 2.4.13 2.4.14 2.4.15 2.4.16
Oil treatment plants Gas treatment plants Compression stations Glycol heating and reconditioning plants Glycol storage tanks Basins for oily waters treatment Oil/gas pipelines Process safety valves Gas flares and vents H 2S process plants
2.5
Requirement of work health and environmental protection
2.6
Ergonomics
2.7
Requirements for Quality Management and Quality Assurance
2.8
Documentation
3
SUPPLEMENTARY ELEMENTS
3.1
Enclosures and informative annexes
3.1.1
Annexes Annex 1 Annex 2 Annex 3 Annex 4 Annex 5 Annex 6 Annex 7 Annex 8
Plant general layout Better location - Process and utilities units Better location - Safety main units Better location - “Critical” plant units Safety spacing to be adopted Pool fire - Computational method Jet fire - Computational method Unconfined gas cloud explosion (pressurised) - Computational method Annex 9 Unconfined gas cloud explosion (not pressurised) Computational method Annex 10 Heavy vapours dispersion - Computational method Annex 11 Hydrogen sulphide dispersion - Computational method
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 5
1.
GENERAL
1.1
Scope
This document has the aim to state the safety requirements for the layout and safety spacing to be adopted in the Oil and Gas treatment Units. These requirements represent the minimum to be applied developing the basic and detail layout for the process areas of all the onshore installations. Particular design requests, which impose alternatives not provided by this specification or by the mentioned legislation, shall be justified and evaluated by the internal expert Units.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 6
1.2
Normative references
1.2.1
European normative references At this moment applicable European Normative References related to the specification does not exist.
1.2.2
Normative references of ISO, IEC and national organizations Norme CEI 64.2
1.2.3
1.2.4
"Impianti elettrici in luoghi a rischio di incendio o esplosione"
Normative references of other organizations API RP 500 B
"Recommended practice for classification of areas for electrical installation at drilling rigs and production facilities on land and on marine fixed and mobile platforms"
API RP 520
"Design and installation of pressure relieving systems in refineries" (Part 1 “Design”, Part 2 “Installation”)
API RP 521
"Guide for pressure relieving and depressuring systems"
Industrial Risk Insurers (IRI)
"General Recommendations for Spacing"
Legislation In areas different from Italy the legislation of the involved country shall to be considered. D.M. 31.7.1934
"Approvazione delle norme di sicurezza per la lavorazione, l'immagazzinamento, l'impiego e la vendita di olii minerali e per il trasporto degli olii stessi"
Ministero Interno "Caricamento e svuotamento nelle raffinerie Circolare dell'11.5.1954, n. 70 e nei depositi di olii minerali, dei veicoli a cisterna ed a botte senza l'attuazione del ciclo chiuso"
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 7
Ministero Interno Circolare del 9.7.1954 n.21137/4105
Criteri di sicurezza per l'installazione e . l'esercizio di centrali di compressione di gas metano"
Ministero Interno Circolare del 22.12.1962, n. 132
Serbatoi di grande capacità (integrazione del DM 31.7.1934)
D.P.R. 19.3.1956, n. 303
"Norme generali per l'igiene del lavoro" "Protezione dei lavoratori contro i rischi derivanti da esposizione ad agenti chimici, fisici, biologici durante il lavoro"
D.P.R. 9.4.1959, n. 128
"Norme di polizia delle miniere e delle cave"
Ministero Interno Circolare del 1965
"Progetto di regolamento generale di prevenzione incendi"
Ministero Interno Circolare del 15.1.1976, n.10.03049/XV.H.24
"Stabilimenti di lavorazione, depositi di olii minerali. Misure di sicurezza"
D.M. 24.11.1984
"Norme di sicurezza antincendio per il trasporto, la distribuzione, l'accumulo e l'utilizzazione del gas naturale con densità non superiore a 0,8"
D.M. 31.3.1984 e
"Norme di sicurezza depositi GPL di capacità non superiore a 5 m 3"
D.M. 20.7.1993 D.P.R. 24.5.1988, n° 203
"Attuazione delle direttive CEE n° 80/779, 82/884, 84/360 e 85/203 concernenti norme in materia di qualità dell'aria, relativamente a specifici agenti inquinanti e di inquinamento prodotto dagli impianti industriali, ai sensi dell'art. 15 della legge 16 aprile 1987 n° 183"
D.M. 12.7.1990
"Linee guida per il contenimento delle emissioni inquinanti degli impianti industriali e la fissazione dei valori minimi di emissione"
D.L. 15.8.1991, n. 277
"Protezione dei lavoratori contro i rischi derivanti da esposizione ad agenti chimici, fisici, biologici durante il lavoro"
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 8
D.Lgs 19.9.1994, n. 626
"Attuazione delle direttive CEE 89/391, 89/654, 89/655, 89/656, 90/269, 90/270, 90/394 e 90/679 riguardante il miglioramento della sicurezza e della salute dei lavoratori sul luogo di lavoro”
D.M. 13.10.1994
"Approvazione della regola tecnica di prevenzione incendi per la progettazione, la costruzione, l'installazione e l'esercizio dei depositi di GPL in serbatoi fissi di capacità complessiva superiore a 5 m 3 e/o in recipienti mobili di capacità complessiva superiore a 5000 kg"
DPGR n.7 Regione Sicilia
1.2.5
1.2.6
"Regolamento di polizia mineraria"
Internal normative references 06744.VAR.ELE.SPC
Classificazione luoghi onshore con pericolo di esplosione e scelta impianti elettrici di sicurezza e materiali
07486.PLI.MEC.PRG
Specifica generale per condotte interrate
References /Ref. 1/:
L.Lusardi, A.Robertson, “Wellheads and Separators Areas Risk Analysis”, Mila Field Development, Snamprogetti Spc. 01-ZC-E70458, 1984
/Ref. 2/:
F.P.Lees, “Loss Prevention in the Process Industries” ediz. 1983
/Ref. 3/:
G.L.Wells, “Safety in process plant design” ediz. 1980
/Ref. 4/:
B.J. Wiekema - TNO / Institute of Environmental and Energy Technology, 1980
/Ref. 5/:
E.P.A. - Environmental Protection Agency, “Technical Guidance for Hazards Analysis”
/Ref. 6/:
NIOSH - National Institute for Occupational Safety and Health, “Chemical Hazards”
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 9
2.
FUNCTIONAL NORMATIVE REQUIREMENT
2.1
Definitions
The following definitions are valid in this document: Classified area: Space of determined dimensions classified taking into consideration both the chemical properties, physical conditions and quantity of the contained dangerous substances processed or stored and the environmental characte ristics, which can influence the dispersion or accumulation of the dangerous substances. The term “classified area”, generally used by AGIP, corresponds to “dangerous zone or AD area” by CEI. Plant area: Zone delimited by internal roads or enclosures, devoted to lodge only one or more plant units similar for pressure level, type of fluid, etc. Dangerous area: Space of undetermined extent where there is a dangerous atmosphere, so as defined by CEI 64-2 rules. The term dangerous area, generally used by AGIP, correspond to “dangerous place” by CEI. Water barrier: Screen of water spray obtained with suitable nozzles in order to reduce quickly the concentration of the flammable gas under the E.L.L. (Explosivity Lower Limit) Burning ray: Burning gas jet coming from pressurised containers. Active defence: Device operating directly on the event in order to reduce the consequences (i.e. fire fighting system). Passive defence: Device or design contrivance devoted to cancel or reduce the effects of an event on the areas or on installation areas close to the event place (i.e. fire breaker wall or safety distance).
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 10
Safety distance: This specification generally considers as safety spacing the distances between: -
enclosure and hazardous equipment installed into the Unit; various hazardous equipment installed into the Unit; hazardous equipment and infrastructures installed into the Unit; hazardous equipment installed into the Unit and outer infrastruct ures .
The main Italian legislation about distances is: -
D.M. 31-7-1934 (paragraphs 38 ÷56), for mineral oils installations; D.M. 13-10-1994 (paragraphs 4.1 ÷4.5), for LPG tanks.
The definitions recalled by the above mentioned laws don’t agree each other; as an explanation each definition is listed with suitable annotations. -
protection spacing:
The D.M. 31-7-1934 doesn’t mention that but defines the distances between tanks/ warehouses/ decantation rooms and inner buildings to be respected. The D.M. 13-10-1994 defines them as distances which determine, inside the tank, a respect zone (see it). -
respect spacing:
The D.M. 31-7-1934 mention them as distances between tanks/ warehouses/ decantation rooms and outer buildings, railways, tramways, bridges, monuments. The D.M. 13-10-1994 doesn’t adopt this term but defines them as outer safety distances (see it). -
outer safety distance:
The D.M. 31-7-1934 doesn’t adopt this term but defines it as respect distance. The D.M. 13-10-1994 define it as distance between dangerous elements of the tank and outer buildings (divided as buildings in general and buildings with a big people concentration), railways and tramways. -
inner safety distance:
The D.M. 31-7-1934 doesn’t mention that but defines the mutual distances between tanks and tanks, tanks and decantation zones, decantation zones and decantation zones. The D.M. 13-10-1994 define it as mutual distance between dangerous elements of the tank (tanks, decantation zone, movable storage tanks, pumps, compressors, etc.).
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 11
-
protection zone:
The D.M. 31-7-1934 mention that as a minimum distances between tanks/ hazardous enclosed spaces and enclosure. The D.M. 13-10-1994 doesn’t report distances from dangerous elements of the tank to the enclosure. -
respect zone:
The D.M. 31-7-1934 doesn’t mention that (see protection spacing) but defines the distances between tanks/ warehouses/ decantation rooms and inner buildings to be respected. The D.M. 13-10-1994 defines that as a zone in which ignition sources, utilities building of the tank, (offices, laboratories, workshops, warehouses, services), roads open to traffic and projection of air-ways, must not exist. Confined explosion: Ignition in bulk of a cloud of flammable gas with explosion into an area confined by walls and ceiling with a whole open area less than 40% of the total walls area. Unconfined explosion: Ignition in bulk of a cloud of flammable gas with explosion outdoors. IDLH - Immediately Dangerous to Life or Health Limit of concentration to which a man can be exposed for half an hour without any irreversible consequences for health or any impairment of escape possibility. (Ref. NIOSH - National Institute for Occupational Safety). LOC - Level of concern Concentration in air of a hazardous substance to which, for a relatively short exposure time, injuries for health can be expected (Ref. EPA - Environmental Protection Agency and ISPESL 1° Supplement of n°1/1993). Preventive measure: Measure or device able to prevent ignition into an area involved by the presence of explosive mixture as a consequence of releases from anomalous events “reasonably expected”. Reasonably expected: It is an event that, according to known incidental events (well-known data), can be considered frequent enough to found on it the dimensioning of active and passive defences. For this reason it is not generally the “most serious” event, since the serious event is also rare or not very frequent, so it is not a valid design reference.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 12
2.2
Operative environment
The design of oil and gas treatment units must take account of environmental conditions of the installation place, defined by the design specification. All the environmental factors, that can influence the system reliability, shall be to consider: -
2.2
minimum and maximum temperature; wind velocity and direction; snowfalls; presence of polluting and corrosive substances; earthquakes; mechanical stress and vibrations due to normal operation; direct or indirect fulmination; electromagnetic influences.
Functional requirements
The General Plot Plan shall be to realise in accordance with the criteria hereinafter stated. Once the General Plot Plan is defined, for process and utilities areas shall be to respect the safety distances stated in subchapter 2.4 of this specification. The General Plot Plan shall be to define in order to maintain the separation among the process equipment and from process equipment and manned areas (or areas that can be manned for emergency). Defining the General Plot Plan the possibility of a next enlargement shall be to consider, in order that the future process areas do not determine an unacceptable reduction of the safety distances. The layout of the areas into the Unit shall be defined so as to exploit main direction of the winds in order to reduce the possibility that gas or smoke release for fire occurrence can involve manned areas and main escape ways.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 13
The volume at /Ref.2/ (F.P. Lees: “Loss Prevention in the Process Industries”) suggests not to exceed the dimensions 100 x 200 m, in order to make emergency entrance and escape easy. The criteria that have determined such layout are stated in the following paragraphs. Units have been divided into the following groups: -
2.3.1
Process and utilities Units Safety main Units “Critical” plant Units
Process and utilities Units Process and utilities Units considered by this specification are as follows; indications for their suitable location are stated in Annex 2: Unit 120: Unit 190: Unit 200: Unit 200: Unit 210: Unit 220: Unit 300: Unit 310: Unit 320: Unit 350: Unit 380: Unit 390: Unit 430:
Chemical injection for well head and plant Launching and/or receiving traps Oil separation (Heaters) Oil separation (Separators/ Oil column stabilisation) Oil treatment Oil transport and storage (Oil removal pumps) Gas separation Gas dehydration (Gas dehydration columns) Liquid hydrocarbons recovery (Gasoline stabilisation column) Gas conditioning Glycol for gas dehydration (Reconditioning glycol column) Glycol for gas dehydration (Glycol storage tanks) Combustible gas oil.
Grouping the process or utilities units must be realised according to the following requirements: -
reduce areas containing toxic or corrosive products;
-
bring the export pumps as close as possible to the relevant storage tanks;
- maintain the (fractioning, absorption, etc.) column as close as possible to the relevant reboiler;
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 14
- put the compressors of acid or sweet gas into the same area for easiness of maintenance, taking into consideration the length of inlet and sending pipes of acid gas (for instance installing the compression unit close to the sweetening unit); - place the air heat exchangers as close as possible to the process areas connected to them and as far as possible from equipment with free burning flame (i.e. ovens, etc.). The evacuation and access paths to the process and utilities areas must have the following characteristics: - two accesses to the installation areas must always exist, one at least placed upwind. - stairs to the installation areas must be provided with handrail; sailor stairs are allowed as escape and access ways only to out-of-the-way zones seldom visited by personnel (i.e. for maintenance); - the access stairs must be placed on the side of plant or equipment more proofed against hazardous events, in order that the equipment itself can be a shield for the personnel going upstairs a nd downstairs.
2.3.2
Safety main Units Safety main Units considered by this specification are as follows; indications for their suitable location are stated in Annex 3: Unit 230: Unit 480: Unit 560: Unit 580: Unit 690: Unit 730:
Flares and vents Electric power generation Oily waters treatment Gaseous effluents treatment Civil buildings Foam/water fire system
Main requirement for safety main Units is to be allowed to work during the foreseeable hazardous events, thus they must be protected against any consequence of those events.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 15
The evacuation and access paths from the areas with safety fundamental Units must comply with the following requirements: - access to the Plant, adopted as the main escape way, must allow a fast access to the car parking; - the plant for the treatment of liquid effluents must be in the centre of the area which it is devoted to and not near to one of the external roads, in order to be far from the vehicles entries. 2.3.3
“Critical” plant Units “Critical” plant Units considered in this specification are the following; indications for their suitable location are stated in Annex 4; Unit 220: Unit 310: Unit 320: LNG Unit 330: Unit 330: Unit 330: Unit 360: Unit 370: Unit 400: Unit 410: Unit 420: Unit 460: Unit 910: Unit 920: Unit 970:
Oil transport and storage (Oil storage tank) Gas dehydration (Instrumentation rooms with fiscal metering equipment) Liquid hydrocarbons recovery (Ethane removing / LPG storage) Gas deacidification (Gas deacidification column) Gas deacidification (H 2S absorber reconditioning column) Gas deacidification (Sulphur recovery) Gas compression Natural gas liquefaction (NGL) Cooling and refrigeration Heating Combustible gas Compressed air Electric energy main supply >1000 V Electric energy main supply 60°C)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 40
(Annex 2)
UNIT 300
:
GAS SEPARATION
Plant
:
Oil and Gas Heaters
Better location:
• •
Alternative location:
•
UPWIND OF PLANTS DOWNWIND OF BUILDINGS AREA
CROSSWIND CLOSE ARRIVALS UNIT
TO
THE
Position as to other Units: ( = prevailing wind)
Area involved by waste gas: the smokes temperature must be < 540°C into gas areas or < 250°C into oil areas
UNIT 310
:
GAS DEHYDRATION
Plant
:
Gas Dehydration Columns
Better location:
• •
Alternative location:
UPWIND OF OIL TREATMENT UNITS UPWIND OF FLAMMABLE LIQUIDS STORAGE -----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 41
(Annex 2)
UNIT 320
:
LIQU ID HYDROCARBONS RECOVERY
Plant
:
Gasoline Stabilising Column
Better location:
•
Alternative location:
DOWNWIND PLANTS
OF
GAS
TREATMENT
-----
Position as to other Units: ( = prevailing wind)
UNIT 350
:
GAS CONDITIONING
Plant
:
Gas Conditioning Plant
Better location:
• •
Alternative location:
UPWIND OF OIL TREATMENT UNITS UPWIND OF FLAMMABLE LIQUIDS STORAGE -----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 42
(Annex 2)
UNIT 380
:
GLYCOL FOR GAS DEHYDRATION
Plant
:
Glycol Reconditioning Columns
Better location:
•
Alternative location:
UPWIND OF PLANTS -----
Position as to other Units: ( = prevailing wind)
UNIT 390
:
GLYCOL FOR GAS DEHYDRATION
Plants
:
Glycol Storage Tanks
Better location: Alternative location:
•
UPWIND OF PLANTS -----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 43
(Annex 2)
UNIT 430
:
COMBUSTIBLE GAS OIL
Plant
:
Gas Oil Tank and Pumps
Better location:
• •
Alternative location:
DOWNWIND OF GAS TREATMENT UNITS DOWNWIND OF EQUIPMENT
-----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 44
Annex 3 -
Better location - Safety main units
UNIT 230
:
FLARES AND VENTS
Plant
:
Gaseous Effluents Treatment System
Better location:
•
DOWNWIND OF PLANTS DOWNWIND OF FLARES
•
BARYCENTRIC AS TO THE PLANTS
•
Alternative location:
Position as to other Units: ( = prevailing wind)
Respect area (free from plants) around the 30 m radius flare for dry gas Plants and 60 m radius flare for gasoline gas Plants
UNIT 480
:
ELECTRIC POWER GENERATION
Plant
:
Electric Power Generator
Better location:
•
UPWIND OF PLANTS IN SAFE AREA(*)
Alternative location:
•
CROSSWIND, BY ADOPTING SAFETY SPACING FROM OTHER AREAS
Position as to other Units: ( = prevailing wind)
(*) Avoid barycentric position as to the plants. Do not place above electric rooms or transformers
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 45
(Annex 3)
UNIT 560
:
OILY WATERS TREATMENT
Plant
:
Liquid Effluents Treatment System
Better location:
•
•
IN DEDICATED AREA DOWNWIND OF PLANTS, MACHINERY AND BUILDINGS OUT OF THE AREA DOWNWIND OF STORAGE TANKS AND LPG/NLG UNITS
Alternative location:
-----
Position as to other Units: ( = prevailing wind)
UNIT 580
:
GASEOUS EFFLUENTS TREATMENT
Plant
:
Thermodestroyer
Better location:
Alternative location:
•
DOWNWIND OF PLANTS
•
DOWNWIND OF FLARES
•
BARYCENTRIC AS TO THE PLANTS
Position as to other Units: ( = prevailing wind)
Respect area (free from plants) around the 30 m radius flare for dry gas Plants and 60 m radius flare for gasoline gas Plants
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 46
(Annex 3)
UNIT 690
:
CIVIL BUILDINGS
Plant
:
Multipurpose Building with or without Control Room
Better location:
•
UPWIND OF PLANTS IN SAFE AREA(*)
Alternative location:
•
CROSSWIND, BY ADOPTING SAFETY SPACING FROM OTHER AREAS
Position as to other Units: ( = prevailing wind)
(*) Avoid barycentric position as to the plants. Do not place above electric rooms or transformers
UNIT 730
:
FOAM/WATER FIRE FIGHTING SYSTEM
Plant
:
Water Pumping Fire Fighting System
Better location:
•
UPWIND OF PLANTS IN SAFE AREA
Alternative location:
•
THE DISTRIBUTION SYSTEM MUST BE PLACED 30 m FROM THE PROVIDED FLAME UPWIND OF IT
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 47
Annex 4
Better location - “Critical” plant units
UNIT 220
:
OIL TRANSPORT AND STORAGE
Plant
:
Oil Storage Tanks
Better location:
•
Alternative location:
DOWNWIND OF PLANTS, BUILDINGS AND MACHINERY, 60 m FROM GASEOUS EFFLUENTS UNIT -----
Position as to other Units: ( = prevailing wind)
UNIT 310
:
GAS DEHYDRATION
Plant
:
Instrumentation room with fiscal metering equipment
Better location:
• •
Alternative location:
UPWIND OF OIL TREATMENT UNITS UPWIND OF FLAMMABLE LIQUIDS STORAGE UNITS -----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 48
(Annex 4)
UNIT 320
:
LIQUID HYDROCARBONS RECOVERY
Plant
:
LPG-LNG Hethane removing unit/Storage
Better location:
• •
Alternative location:
DOWNWIND OF GAS TREATMENT UNITS, BUILDINGS AND MACHINERY OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS(*) --------
Position as to other Units: ( = prevailing wind) (*)For LPG/LNG storage, these criteria are valid only for evaporation basins
UNIT 330
:
GAS DEACIDIFICATION
Plant
:
Gas deacidification column
Better location:
Alternative location: to the barycentric position
•
BARYCENTRIC POSITION AS TO THE PLANTS OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS
•
60 m FROM THE FENCE
•
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 49
(Annex 4)
U NIT 33 0
:
G A S D E AC ID IF ICA T IO N
P lant
:
H2S Absorber Reconditioning Column
Better location:
•
BARYCENTRIC POSITION AS TO THE PLANTS OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS
•
60 m FROM THE FENCE
•
Alternative location: to the barycentric position
Position as to other Units: ( = prevailing wind)
U NIT 33 0
:
G A S D E AC ID IF ICA T IO N
P lant
:
Sulphur Rec ove ry
Better location:
Alternative location: to the barycentric position
•
BARYCENTRIC POSITION AS TO THE PLANTS OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS
•
60 m FROM THE FENCE
•
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 50
(Annex 4)
U NIT 36 0
:
G A S C O M P RE SSIO N
P lant
:
Gas compressors
Better location:
• •
Alternative location:
UPWIND OF OIL TREATMENT PLANTS AND LPG/LNG UNITS AS BARYCENTRIC AS POSSIBLE RELATING TO THE NOISE - - -- -
Position as to other Units: ( = prevailing wind)
U NIT 37 0
:
NA T UR A L G AS L IQ U E F AC T IO N
P lant
:
LPG-LNG Hethane removing unit/Storage
Better location:
• •
Alternative location:
DOWNWIND OF GAS TREATMENT UNITS, BUILDINGS AND MACHINERY OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS(*) - - - -- - - -
Position as to other Units: ( = prevailing wind) (*)For LPG/LNG storage, these criteria are valid only for evaporation basins
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 51
(Annex 4)
U NIT 40 0
:
CO O L ING A ND RE F RIG ER AT IO N
P lant
:
P ropane Cooling Cycle
Better location:
• •
Alternative location:
DOWNWIND OF GAS TREATMENT UNITS, BUILDINGS AND MACHINERY OUT OF AREA DOWNWIND OF STORAGE TANKS AND DRAINAGE TREATMENT UNITS(*) - - - --
Position as to other Units: ( = prevailing wind) (*)These criteria are valid only for evaporation basin
U NIT 41 0
:
H O T O IL
P lant
:
F r e e bu r n i n g H e a t e r s
Better location:
• •
Alternative location:
•
UPWIND OF PLANTS DOWNWIND OF BUILDINGS AREA CROSSWIND CLOSE TO ARRIVALS UNIT
Position as to other Units: ( = prevailing wind)
Area involved by waste gas: the smokes temperature must be < 540°C into gas areas or < 250°C into oil areas
––––––––––––––––––––– ––––––––––––––––––––––––––––– –––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 52
(Annex 4)
UNIT 420
:
COMBUSTIBLE GAS
Plant
:
Combustible Gas System
Better location:
• •
Alternative location:
UPWIND OF OIL TREATMENT PLANTS UPWIND OF FLAMMABLE LIQUIDS STORAGE UNITS -----
Position as to other Units: ( = prevailing wind)
UNIT 460
:
COMPRESSED AIR
Plant
:
Instrumentation Air System
Better location: Alternative location:
•
UPWIND OF PLANTS -----
Position as to other Units: ( = prevailing wind)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 53
(Annex 4) UNIT 910
:
MAIN POWER SUPPLY >1000V
Plant
:
Electric cabin or substation
Better location:
•
UPWIND OF PLANTS, AT THE PLANT BOUNDARY, ACCORDING TO THE INNER AND OUTER CONNECTIONS
Alternative location:
•
CROSSWIND PLANTS
SAFE
SPACED
FROM
Position as to other Units: ( = prevailing wind)
UNIT 920
:
MAIN POWER SUPPLY 5 m 3
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3
D (m.c.)
LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS GAS TREATMENT PLANTS COMPRESSION STATIONS GLYCOL HEATING AND RECOND. GLYCOL TANKS OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
30 (n.n.) 40 (l.i.) 30 (l.r.) 30 (n.n.) 20 (e.i.) 30 (l.r.) 30 (n.n.)
40 (l.i.) 15 (l.i.) (4) 40 (l.i.) 40 (5) 40 (5) 40 (l.i.) 40 (l.i.)
D (m.c.) 20 (e.i.) 30 (e.i.) 30 (e.i.) 60 (n.i.) 60 (n.i.) 15 (n.n.) 15 (n.n.) 30 (n.n.) 30 (e.i.) 30 (e.i.)
40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 60 (n.i.) 60 (n.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.)
40 (l.i.)
40 (l.i.) Σ iDi/2
(3)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
(*) (l.i.) 30 (e.i.) 30 (e.i.) 30 (e.i.)
40 (l.i.) 40 (l.i.) 40 (l.i.) d.s. (l.i.)
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
(3) (4) (5) (*)
-
(*) (l.i.) (*) (l.i.) (*) (l.i.) (*) (l.i.) (*) (l.i.)
40 (l.i.) 40 (l.i.) 40 (l.i.) 60 (l.i.) 60 (l.i.)
it reduces to 0.8 m if the tanks are underground it reduces to 7.5 m if the tanks are underground it reduces to a half if a water barrier is interposed to be defined each time according to the tank capaci ty
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 58
(Annex 5)
LIQ. HYDROC. LOADING BAYS
LPG LOADING BAYS
WELLS
40 (l.i.) 15 (l.i.) 40 (l.i.) 10 (l.i.) 50 (l.r.) 40 (5) 40 (5) 60 (n.n.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 60 (n.i.) 60 (n.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.) 40 (l.i.)
30 (l.i./l.r.) 30 (l.i./l.r.) 50 (l.r.) 50 (l.r.) n.v. 30 (e.i.) 30 (e.i.) 30 (l.r.) 50 (l.r.) 15 (e.i.) 50 (l.r.) 50 (l.i.) 100 (l.r.) 15 (e.i.) 30 (n.i.) 60 (n.i.) 30 (e.i.) 30 (e.i.) 30 (l.i./l.r.) 30 (l.i.) 30 (e.i.)
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3 LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS GAS TREATMENT PLANTS COMPRESSION STATIONS GLYCOL HEATING AND RECOND. GLYCOL TANKS OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
30 (n.n.) 40 (l.i.) n.v. 40 (l.i.) 50 (l.r.) 60 (n.n.) 60 (n.n.) 60 (n.n.) 30 (n.n.) 30 (e.i.) 30 (e.i.) 30 (e.i.) 30 (e.i.) 30 (n.i.) 60 (n.i.) 30 (n.n.) 30 (n.n.) 30 (n.n.) 30 (n.n.) 30 (n.n.)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
30 (e.i.) 30 (n.n.) 30 (n.n.) 30 (a.c.)
40 (l.i.) 40 (l.i.) 40 (l.i.) d.s. (l.i.)
50 (l.i.) 30 (e.i.) 30 (e.i.) 50 (l.i.) 100 (l.r.)
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
(5)
30 (a.c.) 30 (a.c.) 30 (a.c.) 30 (e.i.) 30 (a.c.)
40 (l.i.) 40 (l.i.) 40 (l.i.) 60 (l.i.) 60 (l.i.)
50 (l.i.) 100 (l.r.) 30 (l.i.) 50 (l.i.) 100 (l.r.) 50 (l.i.) 100 (l.r.) 50 (l.i.) 100 (l.r.)
-- it reduces to a half if a water barrier is interposed
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 59
(Annex 5)
OIL TREATMENT PLANTS
GAS TREATMENT PLANTS
COMPRESSION STATIONS TURBINES
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3 LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS
30 (n.n.) 40 (l.i.) 60 (n.n.) 40 (l.i.) 30 (e.i.) 10 (m.c.)
20 (e.i.) 40 (l.i.) 60 (n.n.) 40 (l.i.) 30 (e.i.) 20 (m.c.)
GAS TREATMENT PLANTS
20 (e.i.)
3 (m.c.)
COMPRESSION STATIONS GLYCOL HEATING AND RECOND. GLYCOL TANKS
15 (e.i.) 30 (n.n.) 30 (e.i.)
3(m.c.) 30 (m.c.) 20 (e.i.)
OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES
20 (e.i.) 30 (e.i.)
20 (e.i.) 20 (e.i.)
PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER
15 (n.n.) 60 (n.i.) 60 (n.n.) 15 (e.i.)
15 (n.n.) 30 (n.i.) 60 (n.n.) 3 (m.c.)
MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
15 (e.i.) 30 (n.n.) 30 (n.n.) 30 (e.i.)
3 (m.c.) 30 (m.c.) 30 (n.n.) 40 (m.c.)
30 (l.r.) 40 (l.i.) 60 (n.n.) 60 (n.n.) 30 (l.r.) 0.27 · G
0,33
0.27 · G 0,33 3 (m.c.) 30 (l.r.) 0.27 · G 0,33 30 (n.n.) 0.27 · G 0,33 15 (n.n.) 30 (n.i.) 60 (n.i.) 0.27 · G 0,33 10 (l.i.) 30 (l.r.) 15 (e.i.) 30 (v.e.)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
60 (e.i.) 60 (n.n.) 30 (e.i.) 30 (n.n.)
40 (m.c.) 40 (m.c.) 40 (m.c.) 30 (m.c.)
30 (n.n.) 15 (n.n.) 15 (n.n.) 20 (l.i.)
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
30 30 30 60 60
(e.i.) (e.i.) (e.i.) (e.i.) (e.i.)
40 (m.c.) 40 (m.c.) 100 (m.c.) 100 (m.c.) 100 (m.c.)
20 (l.i.) 20 (l.i.) 100 (l.i.) 100 (l.i.) 100 (l.i.)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 60
(Annex 5)
GLYCOL HEATING AND RECOND.
GLYCOL TANKS
OILY WATERS TREAT. BASINS
D (m.c.) 40 (l.i.) 30 (e.i.) 40 (l.i.) 15 (e.i.) 30 (e.i.) 20 ( e.i.)
20 (e.i.) 40 (l.i.) 30 (e.i.) 40 (l.i.) 50 (l.r.) 20 (e.i.) 20 (e.i.) 30 (n.n.)
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3 LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS GAS TREATMENT PLANTS COMPRESSION STATIONS
30 (n.n.) 40 (l.i.) 30 (n.n.) 40 (l.i.) 50 (l.r.) 30 (n.n.) 30 (m.c.) 30 (l.r.)
GLYCOL HEATING AND RECOND. GLYCOL TANKS OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
n.v. 10 (e.i.) 20 (e.i.) 20 (e.i.) 15 (n.n.) 30 (n.i.) 60 (n.i.) 6 (m.c.) 6 (m.c.) n.v. 15 (n.n) 10 (m.c.)
0.27 · G 0,33 10 (e.i.) 7,5 (l.i.) 15 (m.c.) 20 (e.i.) 15 (n.n.) 30 (n.i.) 60 (n.i.) 7,5 (e.i.) 7,5 (e.i.) 10 (e.i.) 6 (l.i.) 20 (l.i.)
20 (e.i.) 15 (m.c.) n.v. 15 (n.i.) 15 (n.n.) 30 (n.i.) 60 (n.i.) 15 (m.c.) 15 (m.c.) 20 (e.i.) 15 (e.i.) 30 (m.c.)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
10 (m.c.) 10 (m.c.) 10 (m.c.) 15 (n.n)
20 (l.i.) 20 (l.i.) 20 (l.i.) 6 (e.i.)
30 (m.c.) 30 (m.c.) 30 (m.c.) 20 (e.i.)
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
30 (n.n.) 30 (n.n.) 30 (n.n.) 30 (n.n.) 30 (n.n.)
20 20 20 20 20
(l.i.) (l.i.) (l.i.) (l.i.) (l.i.)
30 (m.c.) 30 (m.c.) 30 (m.c.) 75 (m.c.) 75 (m.c.)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 61
(Annex 5)
OIL PIPELINES/GAS PIPELINES
PROCESS SAFETY VALVES
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3 LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS GAS TREATMENT PLANTS COMPRESSION STATIONS GLYCOL HEATING AND RECOND. GLYCOL TANKS OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
30 (e.i.)
30 (e.i.)
40 (l.i.) 30 (e.i.) 40 (l.i.) 50 (l.i.) 100 (l.r.) 30 20
40 (l.i.) 30 (e.i.) 40 (l.i.) 15 (n.n.) 15 (n.n.) 15 (n.n.) 15 (n.n.)
0.27 · G 0,33 20 (e.i.) 20 (e.i.) 15 (n.i.) 1 - 2 -10 (6) 15 (n.n.) 30 (n.i.) 60 (n.i.) 10 (l.i.) 10 (l.i.) 20 (e.i.) 30 30 (n.i.)
15 (n.n.) 15 15 15 15 15 15 15 15 15 15 15
(n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.) (n.n.)
15 15 15 15
(n.n.) (n.n.) (n.n.) (n.n.)
15 15 15 15 15
(n.n.) (n.n.) (n.n.) (n.n.) (n.n.)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.)
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
(6)
30 (n.i.) 30 (n.i.) 30 (n.i.) 100 (n.i.) 100 (n.i.)
- the minimum distance to be adopted are : * 1 m between two underground gas pipelines * 2 m between two underground oil pipelines or a gas pipeline and a oil pipeline * 10 m between the shut-off valves of the gas and oil lines placed at the connection to the main manifolds, if above ground
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 62
(Annex 5)
DRY GAS FLARES
WET GAS FLARES
H2S PROCESS
60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.n.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 15 (n.n.) 10 log(Q-2)/2 10 log(Q-2)/2 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.)
n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. n.v. 30 (m.c.)
PLANTS
HAZARDOUS EQUIPMENT LIQU. HYDROC. STORAGE TANKS LPG STORAGE TANKS > 5 m 3 LIQU. HYDROC. LOADING BAYS LPG LOADING BAYS WELLS OIL TREATMENT PLANTS GAS TREATMENT PLANTS COMPRESSION STATIONS GLYCOL HEATING AND RECOND. GLYCOL TANKS OILY WATERS TREAT. BASINS OIL PIPELINES/GAS PIPELINES PROCESS SAFETY VALVES DRY GAS FLARES WET GAS FLARES PRESSURE REDUCER MEASUREMENT CABIN FREE FLAME EQUIPMENT GLYCOL PUMPS MANUAL SOV
60 (n.i.) 60 (n.i.) 30 (n.i.) 60 (n.i.) 30 (n.i.) 60 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 15 (n.n.) 10 log(Q-2)/2 10 log(Q-2)/2 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.)
FITTINGS INSIDE THE PLANT OFFICES, CONTROL ROOM FIRE FIGHTING PUMPS FIRE FIGHTING VALVES AERIAL POWER LINES
30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.)
60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.)
30 (m.c.) n.v. n.v. n.v.
FITTINGS OUTSIDE THE PLANT CARRIAGE ROADS NON-CARRIAGE ROADS RAILWAYS AND TRAMWAYS PUBLIC PREMISES STATIONS
30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.) 30 (n.i.)
60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.) 60 (n.i.)
100 (m.c.) 30 (m.c.) 30 (m.c.) 100 (m.c.) 100 (m.c.)
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 63
Annex 6
Pool fire - Computational method
The relation for round base flame height computing is drawn from:
(1)
H = D ⋅ 42 ⋅ ( 0,06 / 1,27 ⋅ 9.8 ⋅ D ) 0,61
where: H is the flame height in metres D is the round base flame height 0,06 is the liquid hydrocarbons combustion rate in kg/(m 2 · s) If the base flame were square shaped (i.e. into a duct or a control basin or an annulus of a floating roof tank), the following relations would be adopted: (2)
Fr = 0,48 / D1
where: Fr is the discriminating factor for flame height determination D1 is the lower dimension of the flame base in meters. If Fr ≥ 0.25, the flame height is: (3)
H = 2,2 · D1
otherwise is: (4)
H = 0,88 · (Fr)-0,65 · D1
For radiation computing, the following relations are used: (5)
E = 130 · e-0,12 · D + 20 · (1 - e -0,12 · D)
where: E is the flame radiating flux in kW/m 2 (For flames with a diameter >20 m fixed value E = 130 kW/m 2 shall be to adopt). Radiation reaching the observer is: (6)
q = F · E
where: q is the radiation in kW/m 2 F is the view factor with the following values:
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 64
(Annex 6)
•
if the flame is round shaped, C is the distance in metres from the flame centre to the observer and B is the flame radius: H/B = 0,1 H/B = 0,5 H/B ≥ 2 H/B ≥ 2 H/B ≥ 2 H/B ≥ 2 H/B ≥ 2 H/B ≥ 2
•
C/B C/B C/B C/B C/B C/B C/B C/B
= = = = = = = =
2 2 1 1,2 1,5 2 3 4
F = 0,028 F = 0,129 F = 0,580 F = 0,517 F = 0,392 F = 0,267 F = 0,141 F = 0,083
if the flame base is square shaped, C is the distance in metres from the flame surface to the observer: H/C H/C H/C H/C H/C H/C H/C
= = = = = = =
0,5 0,5 0,5 0,5 0,1 0,1 0,1
D/C D/C D/C D/C D/C D/C D/C
= = = = = = =
0,5 0,2 0,1 0,05 0,2 0,1 0,05
F = 0,06 F = 0,027 F = 0,014 F = 0,007 F = 0,006 F = 0,003 F = 0,002
In order to evaluate the equilibrium radius of an unconfined pool fire, that is the flame radius relating to the steady phase when as much product leaks and burns, the following relation is considered: (7)
3 · log R = 1,6 · log Q + 0.89
(log = common logarithm)
where: R = pool equilibrium radius, in metres Q = leaking product flowrate, in kg/s When the flame radius is determined, radiation can be evaluated by (1) to (6) formulas. That is, with an oil leakage of 5 kg/s, R is 4.67 m, flame height is H = 15,3 m and radiating flux is E = 55.8 kW/m 2.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 65
Annex 7
Jet fire - Computational method
For gas jet fires can be used some correlations for the flame spacing (it corresponds to a 1% of gas concentration by volume) according to the hole diameter. The correlations are: (1)
X = 1,33 · (d'/d) · d
where: X is the distance in meters from the leakage point to the point where concentration is 1% (with an equipment pressure of 50 bar); (2)
d'/d = 0,625 ln p + 0,0625
where: d is the hole diameter in cm d' is the jet diameter in cm p is the equipment pressure in bar.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 66
Annex 8 Unconfined Computational method
gas
cloud
explosion
(pressurised)
-
The relation for the mass of flam mable gas in a cloud arising from a pressurised gas leakage is the following/Ref.2/: Q = 45400 ⋅ Ta ⋅ d 3 ⋅ 1067 / To
(1)
1,5
where: Q is the mass in kg of flammable gas into the cloud ; Ta is the ambient temperature in K d is the jet diameter of the already expanded gas (meters) (see Annex 7) To is the gas temperature in K (generally 288 K) The relation (1) is valid only for natural gas whose composition is defined by CEI 64.2 codes. Once determined the mass into the explosive zone, the “hazard circumference” shall be to evaluate, that is the distance where the consequences of a possible explosion are detected. The hazard circumference is from the following relation /Ref. 4/: R = K · (0.1 · E )
(2) where: R K
E Q
1/3
is the radius of the circumference limiting the hazard zone is a coefficient with value: - 0,03 if the hazard circumference is considered for the plants equipment; - 0,06 if the hazard circumference is considered for the fittings into the Plant; - 0,15 if the hazard circumference is considered for the fitting out of the Plant. is the energy content of the explosive part of the cloud whose value is 5 · 10 7 · Q (in Joule) is the mass in kg of the flammable gas into the cloud
In order to obtain the extension of the explosive zone downwind of the leakage, the following correlation is considered: (3)
log Q 1 = 2 · log L + 2
(log = common logarithm)
where: Q1 is the gas flowrate in m 3 / g L is the downwind spacing from the Explosivity Lower Limit (ELL) in atmosphere with a medium stability.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 67
(Annex 8)
The values obtained by the application of this computational model and listed in table of Annex 5 have been determined by the following operative scheme which can help for verifying also real conditions substantially different from those assumed : •
•
• •
•
•
• •
has been considered a pipe 120 mm in diameter and then a leakage from a hole 12 mm in diameter (10% of the pipe diameter, as sta ted in 2.4.2.1.2) from the relation (2) of Annex 7 the jet diameter can be determined ( 3 cm at 50 bar pressure) from the relation(1) the explosive mass Q can be determined ( 6 kg) from the relation (2) the hazard radius can be calculated as the minimum distance for the installations equipment ( 20 m) from the relation (2) the hazard radius can be calculated as the minimum distance for the fittings into the Plant, usually offices and control room( 40 m) from the relation (2) the minimum distance towards the fittings out of the Plant can be calculated ( 100 m) the gas flowrate is evaluated ( 1 kg/s at 50 bar pressure) from the relation (3) the ELL is evaluated ( 30 m) which represents the minimum distance from heaters, reconditioners and free burning flame equipment.
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 68
Annex 9
Unconfined gas cloud Computational method
explosion
(not
pressurised)
-
The relation for the mass of flammable gas in a cloud arising from non pressurised gas leakage is the following/Ref.2/: Q = (12 / T a) · V1.2 · 63 / (1 - 0.55 T a / To) 0.6
(1)
where: Q is the mass in kg of flammable gas into the cloud ; Ta is the ambient temperature in K V is the gas flowrate in m3/s To is the gas temperature in K The relation (1) is valid only for natural gas whose composition is defined by CEI 64.2 codes. Once determined the mass into the explosive zone, the “hazard circumference” shall be to evaluate, that is the distance where the consequences of a possible explosion are detected. The hazard circumference is from the following relation /Ref. 4/: R = K · (0.1 · E )
(2) where: R K
E Q
1/3
is the radius of the circumference limiting the hazard zone is a coefficient with value: - 0.03 if the hazard circumference is considered for the plants equipment; - 0.06 if the hazard circumference is considered for the fittings into the Plant; - 0.15 if the hazard circumference is considered for the fitting out of the Plant. is the energy content of the explosive part of the cloud whose value is 5 · 10 7 · Q (in Joule) is the mass in kg of the flammable gas into the cloud
The values obtained by the application of this computational model and listed in table of Annex 5 have been determined by the following operative scheme which can help for verifying also real conditions substantially different from those assumed : has been considered a pipe 120 mm in diameter and then a leakage from a hole 12 mm in diameter (10% of the pipe diameter, as stated in 2.4.2.1.2) •
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 69
(Annex 9)
• • •
•
•
the gas flowrate is evaluated (0.17 kg/s) from the relation(1) the explosive mass Q can be determined (0.8 kg) from the relation (2) the hazard radius can be calculated as the minimum distance for the installations equipment (6 m) from the relation (2) the hazard radius can be calculated as the minimum distance for the fittings into the Plant, usually offices and control room(10 m) from the relation (2) the minimum distance towards the fittings out of the Plant can be calculated too (25 m).
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
20243.VON.SAF.SDS Rev.0 May 1996 Sheet 70
Annex 10
Heavy vapours dispersion - Computational method
The vapours quantity that can overflow from a basin containing oily products has been considered by Kletz /Ref.2/; it has been evaluate d about 1 ton. It is necessary to evaluate the volume into the explosive field. Different criteria can be used: 10% of the volume released in 30” can be considered ( Bureau of Mines), or 2% of the total volume of released vapours ( Industrial Risk Insurers), or 7% of the total mass released ( TNO, "Report of the Committee for the Prevention of Disasters" published by General Directorate of Work of the Ministry of Social Affairs, 1979). Once determined the mass into the explosive zone, the “hazard circumference” shall be to evaluate, that is the distance where the consequences of a possible explosion are detected. The hazard circumference is from the following relation /Ref. 4/: R = K · (0.1 · E )
(2) where: R K
E Q
1/3
is the radius of the circumference limiting the hazard zone is a coefficient with value: - 0.03 if the hazard circumference is considered for the plants equipment; - 0.06 if the hazard circumference is considered for the fittings into the Plant; - 0.15 if the hazard circumference is considered for the fitting out of the Plant. is the energy content of the explosive part of the cloud whose value is 5 · 10 7 · Q (in Joule) is the mass in kg of the flammable gas into the cloud
––––––––––––––––––––––––––––– Il presente documento è RISERVATO ed è di proprietà dell'AGIP. Esso non sarà mostrato a Terzi né sarà utilizzato per scopi diversi da quelli per i quali è stato inviato. This document is CONFIDENTIAL and the sole property of AGIP. It shall neither be shown to third parties nor used for purposes other than those for which it has been sent.
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