IS 6392
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IS :6392 -1971 (Reaffirmed 1008)
Indian Standard SPECIFICATION FOR STEEL PIPE FLANGES Seventh Reprint MAY 1999 ( Incorporating Amendment No. 1)
UDC
621.643.412
0
BUREAU MANAK
Gr 11
OF
BHAVAN,
[ 669.1.4
1
Copyright 1972
INDIAN
STANDARDS
9 BAHADUR SHAH NEW DELHI 110002
ZAEAR
MARG
September 1972
IS : 6392 - 1971
Indian Standard SPECIFICATION FOR STEEL PIPE FLANGES Steel
T;bes,
Pipes
and
Fittings
Sectional
Committee,
Chairman
SklIX
22
Reprrsentin~
Indian Tube Co Ltd, Calcutta
,HRI J. G. KESWANX Members jHRIS. C. ANAND SHRI K. C. SRIVASTAVA ~HRI E. ANANDA Rao
Uharat Steel Tubes Ltd, New Delhi (Alltmafe)
Tube Products of India, SIIRI T. SIVASHANKAR ( Altcmafe ) jHRI D. K. rZROR.4 Jyoti Limited, Baroda ~SSISTAF;TI)IRECTOR STANDARDS Ministry of Railways ( Loco ), LICKNOW ~HRI K. K. BANERJEE SHRI s. SRlNIVAsAN (.&7~~t~) IHRI B. BEHERA SHRI G. DAS GUPTA ( Ahmtc) ~HRI B. H. CHAKRAVERTI SI$RI 4. K. SHOME i klernalr) ~xE~UTI\,E E:NCINELR, CENTRAL STORES DIVISION NO. 1 &RI PII.M. GHOSH SHRI B. K~MAR ( Alternafe ) ~HRI C. P. GUPTA SHRI B. A. DEWI ( Afternote ) ~HRI P. K. GUPTE
Hindustan . Hindustan
Shipyard Stcrl
Stewarts Zenith
Works
8~ Lloyds St&
Ltd, Visakhapatnam
Co of India
Public
Madras
Ltd, Rourkcla
Superintendrnce Central
Avadi,
Private
Department,
of India
Ltd,
Ltd, Calcutta New Delhi
Calcutta
Pipes Ltd, Khopoli
Metallurgical National ( CSIR ), Laboratory Jamshedpur Indian Oil Co Ltd, Bombay ~HRI M. K. JAIN Kalinga Tubes Ltd, Calcutta ~HRI J~con JOHN SHRI AJIT MOHAPATRA ( Alternate ) Directorate General of Supplies & Disposals &RI M. T. KANSE ( Inspection Wing ) SHRI S. G. KAPUR ( Alternntc) Defcnce Xlcrallurgical Research I.&oratory [ Ministry LT-CDK V. N. MADHAV RAO ofDefenceiR&Djl SI~RI P. S. ARAVINDAKSHAN( Alternate ) Indian Tube Co Ltd. Jamshedpur SHRI P. MITRA Gujarat Steel Tubes Ltd. Ahmedabad SHRIGOPAI. J.PATEL SHRI SHAILESH V. SHAH ( Alfcrrtnte ) Burmah-Shell Rrfinrries I.td, Bomba) SHRI N. R. ROYCHOWDHURY SHRI S. L. ARANHA ( Altrrnote) l’.W.D. ( Public Health Branch ), Governmrnt of SHRI J. L. SETHI Hnrynn;~. C:h:mdigar h
BUREAU MANAK
OF
INDIAN
STANDARDS
BHAVAN, 9 BAHADUR SHAH NEW DELHI 110002
ZAFAR
MARC
18 : 6392 - 1971 ( Continucdfiom
pug8 1 ) Represenfing
hhmbers SHRI D. V. VADERA SE~RIR. K. SRIVASTAVA,
Deputy Director
( Strut & Met )
Central Boilers Board, New Delhi Director General, IS1 ( Ex-ofi& Member ) Secretary SHRI P. K. JAIN
Assistant Director Panel
( Metals ), ISI
for Steel Pipe Flanges and Steel Pipe Flanged Fittings, SMDC 22 : P 1I
Stewarts
SHRI K. E. BISHOP
& Lloyds of India Ltd, Calcutta
Members SHRI K. S. BASU ( Alternate
Shri K. E. Bishop ) SHRI K. K. BANERJEE
to
S. SRINIVASAN( Alternate ) CHIEF CHEMICAL ENGINEER AND SAUZS MANAGER SHRI VINODCHANDRAH. DOSHI SHRI H. H. JETHANANDANI SIIRI .I. P. JOSHI SHRI
SHRI
B.
N.
MAUSKAR
Hindustan
Shipyard
APV Engineering
Ltd, Visakhapatnam
Co Ltd, Calcutta
Echjay Industries Private Ltd, Bombay Fertilizer Corporation of India Ltd, Sindri ,W?lchandnagar Industries Ltd, P.O. Walchandnagar Republic Forge Co Ltd, Secunderabad Indian Tube Co Ltd, Jamshedpur Bharai Heavy Electricals Ltd, Tlruchirapalli
SKRI Y. MITRA SHRI V. R. RAMA PRASAD . SHRI M. K. RAGHUNATHAN ( Alternate ) John Thompson (I) Private Ltd, Calcutta REPRESENTATIVE K. C. P. Ltd, Madras SHRI K. SATYANARAYANA Dewrance Macneill & Co Ltd, Calcutta SHRI K. K. SEN ACC-Vickers-Babcock Limited, Durgapur SHRI D. G. TURNBULL Central Boilers Board, NW Delhi SHRI D. V. VADERA
IS : 6392 - 1971
Indian Standard SPECIFICATION FOR STEEL PIPE FLANGES 0.
FOREWORD
0.1 This Indian Standard was adopted by the Indian Standards Institution on 29 October 1971, after the draft finalized by the Steel Tubes, Pipes and Fittings Sectional Committee had been approved by the Structural and Metals Division Council. 0.2 The ‘importance of piping i:lstallations necessitated the preparation of this standard turers of flanges and flanged fittings.
in various industries has for the users and manufac-
0.3 In the formulation of this standard due weightage has been given to international co-ordination among the standards prevailing in different countries in addition to rclatin 9 it to the practice in the field in this country. , Considerable assistance has been drawn from BS 4504 : 1969 ‘ Flanges and bolting for pipes, valves and fittings ’ issued by the British Standards Institution. 0.4 For the information of designers the high temperature properties steels, whereves available, have been given in Appendix A. Values other steels will be included when available. 0.5 This agreement
standard between
contains clauses 1.3, 5.2 and 7.1 the purchaser and the manufacturer.
which
call
of for
for an
0.6 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, exprcssing the resrrlt of a test or analysis, shall be rounded off in accordance with The number of significant places retained in the rounded off IS: 2-19tio*. value should be the same as that of the specified value in this standard.
1. SCOPE 1.1 This standard covers the requirements for cast, forged and plate or flat steel pipe flanges of the following types for use in industry for oil, water,
steam,
air, gas and chemical
services:
a) Integral, b) Welding
neck,
*Rules for rounding off numerical valu,.s ( revised ). 3
IS : 6392 - 1971 c) Plate, d) Screwed e) Slip-on
boss, boss,
f ) Loose flanges for welded-on
lapped pipe ends, and
g) Blank. 1.2 This standard uoes not specify limitations on the use of various methods The adequacy for of attachment of flanges to pipe or other equipment. operating conditions of any method of attachment specified should be determined by the designer of the piping or equipment. I.3 The types and materials of gaskets used shall purchaser and the manufacturer.
he agrerd
between
NOTE 1 - The term ‘ plate flange’ indicates the shape of the flange ‘as the flanges not necessarily made from steel plate hut may he made from forged or cast steel. NOTE 2 fittings.
The term
‘ integral
flange
’ applies to flanges integral
the are
with pipes, valves and
2. MATERIAL 2.1 The material\ shall be those given in Table 1 cxcc.pt that alternative materials may be uyed provided that their mechanical properties are not inferior at the operating temper-aturr. 2.2 Bolting Material-Both bolts and nuts shall be in accordance with IS : 1364-1967*. For alloy steel studs or bolts, nuts of a similar steel, If carbon steel is used, it shall have but of a different qrade shall be used. a tensile strength of 415 N/mm%, A4in ( 1 kgf = 9.81 N )~ 2.2.1 For temperatures may be used.
up to 45O”C, carbon
steel bolts,
studs
2.2.2 For temprratures higher than 450°C bolts and studs alloy steel and nutr shall be of carbon or alloy steel of different bolts less than 12 mm size alloy steel nuts shall be used. 2.3 Steel pipe flanges shall be supplied according all threaded fasteners according to IS : 1367-1967$.
and
nuts
shall ,be of grade. For
to IS : 1387-1967T
and
3. CLASSIFICATION 3.1
This standard
applies
Classes O-1, 0.25,
to Sarlges
0.60,
l.0,
of the following
1.6, 2.5, 4.0, 6.4,
class designations: 10.0 and 16.0.
*Specification for precision and semi-precision hexagon bolts, screws, nuts and lock nuts ( dia range 6 to 39 mm ) (J;nr revision ). tGencra1 requirements for the supply of metallurgical materials (jrst revision ). :Technical supply conditions for threaded fasteners (Jirst r~~kion ).
4
+
IS : 6392 - 1971 TABLE
1
MATERIAL
SPECIFICATION
(ckWsc2.1
9
SPECll’ICATION
CLASSlPICAT~OFd
IE. a)
)
Forgings
Carbon
steel
IS : 2004.1970+,
Classcs 2 and 3
molybdrnum
IS:
Grade 20 @050, Max, of
ii)
Carbon
iii)
Chrome-molybdenum
atccl
1570-196lt, MO g with S and P
steel
1) 1 percent chromium-O.5 denum steel chromium 2) 2.25 percent molybdenum steel
percent -
1
molyb-
IS : 261 l-1964$
percent
IS : ;3;0&67’, r
Grade
10
b) Costingr iv) v)
Carbon
Chrome-molybdenum
CSW-
IS : 2856-196411, Grades C20 and CSW-C25
steel steel
1) Carbon molybdenum steel 2) 2.25 percent chromium molybdenum steel 3) 225 percent chromium-l dcnum steel
-
0.5
percent
IS : 3038-19659, IS : 3038-19659,
mol)&
IS
: 3038-196571, Grade 5
IS
: 2002-1962**,
percent
Grade Grade
2 4
c) Rolled Plates vi)
Carbon
atccl
Grades
1 and
2A vii)
Carbon
molybdenum
IS:2041-1962tt, MoZ
steel
‘Specification for carbon steel forgings for general engineering tSchedules for wrought steels for general engineering purnoses. issued in parts ).
Grade
purposes ( first r&ion ( Since revised and
20
).
$Sprrification for carbon chromium molybdenum steel forgings for high temperature scwic c. $Speciticntion for alloy and tool steel forgings for general industrial use. IlSperification for carbon stw! casting- suitablr for high trnlperature service ( fusion welding quality ). ( Since revised ). l/Speciticariotr for alloy steel castings for pressure containing parts suitable for high lcr~~pcr’dt~rc scrvire. ( Since revised ). **Specikation for Ttrrl platrs for boilers. ttSpccification for steel pi.11~5for pressure vessels. 3.2 Pressure Temperature tire primary servkc pre~\rk~c square.
Ratings rxtings
rJf
5
-
The the
&ss
flanges
designations represent in newtons/millimetre
IS2 6392 - 1971 3.2.1 The allowable stress values for the different materials given in Table 1 shall be determined by dividing the appropriate properties of the mtiterial by the‘ factors given in the table below and taking the lowest value. 3.2.2 Pressure ratings at different temper:rtures for ‘flan:qes made E-om different types of steel mentioned in Table 1 may Ix arrived at by the formula given below: Pressure Pressure -
ratings at primary service Gmperature, ratings at any other temperature, ‘rS
Allowable Allowable
3.2.3
Other
II
stress value at primary service temperaturt-, stress value at any temperature, 7, properties
T,
are given below: Carbon and Carbon Matzganese Steele
Proper9
Low Alloy Steels
Certified or specified minimum yield ( or 0.2 percent proof) stress at design temperature
1.5
1.5
Specified minimum tensile stress at room temperature
3.0
3.0
Average stress to rupture in 10000 design ternperaturc
1
1
produce hours at
NCITE 1 ---In the case of castings, the above factors shall be divided by a qu&y factor of 0.75. However, a quality factor of 0.9 shall be used when the following requirements have been met with: a) Each casting has been radiographically examined at all critical locations and found free from harmful defects, or the castings have been fully machined to such an extent that all critical sections arc exposed for the full thickness as in the case 6f tube plats with holes spaced not further apart than the thickness of the casting.. b) All castings have been examined at a11 critical localions using magnetic particle, or pcnetrant fluid procedure ( see IS : 3658-19OG* and IS: 370%196Gt ) or by grinding or machining and etching. c) Castings found tobc dcfcctivc have been njccted or repaired to the satisfaction ofthc inspecting authority. If repairs by welding arc carried out, the castings shou!d be subsequently stress-relieved or heat-treated 3s agrpcd between the st:cl-maker and the inspecting authority, Repair areas of castings should bc rcexamsned in accordance with 3.2.3 (a) and should be shown to bc free ~from In all other cases a factor of 0.75 shall be used instead ofO.90. harmful defects. NOTE 2 - The minimum tensile strength been specified in the relevant specifications. NOTE 3 -For *Code t&de
of practice or practice
high temperature
properties,
yield strength see Appendix
for liquid pcnclrant flaw detection. for magnetic particle flaw dckection.
6
at A.
room
tcmpcraturc
have
L
IS : 6392 - 1971 4. DESIGNATION 4.1 The flanges shall be designated
by the nominal bores of their respective In addition to the nominal pipes as shown in column 1 of Tables 2 to 42. bore size the rated pressure, type, grade and standard number of the material for flange should also be given to completely specify the flange.
5. FLANGES 5.1 Dimensions pressure to 42.
- The dimensions of various types of flanges for different classes conforming to this standard shall be as given in Tables 2
5.2 Machining of Flanges - ?‘he backs of integral flanges shall be machined except that the backs of integral forged flanges need not be machined provided they are parallel with the whole face within 1 deg. Where machining is carried out it may be either by spot facing at the bolt holes or by back facing at the option of the manufacturer. 5.2.1 The backs of other flanges may be left unmachincd ing is required by the purchaser. 5.2.2 Unless othcrwGsc specified by the purchaser drilled, equally spaced on the pitch circle diameter. Ilangcs the bolt holes shall be drilled off centres.
unless machin-
all bolt holes shall be In the case of i,ntegral
6. TOLERANCES 6.1 Tolerances
on flange diameter, shall be as follows: 6.1.1
thickness
and
length
of welding
necks
Outside Diameter D Machined
Unmachined
Up to 200 nun inclusive
f
1 mm
f2mm
Over
200 mm to 300 mm inclusive
f
1.5 mm
&2mm
Over
300 mm lo 400 mm inclusive
& 2 mm
-&3mm
*2mm
f5mm
Over 400 mm 6.1.2
Thickness b
6.1.2.1 steel ) :
Flanges
integral
with valves
7
and
fittings
(other
than
forged
IS : 6392 - 1971 Thickness ____A_.___~ Over Up to and In&ding mm mm
Machined at Back
.Not Machined at Back
-
10
+ 1.5 -0
+ !Er -0
10
20
-t 2.0 -0
+ 3.5 -0
20
30
+ 2.5 -0
+ 4.5 -0
30
50
+ 3.0 -0
+ 6.5 -0
50
70
+ 4.0 -0
+ 8.5 -0
70
100
+ 5.0 -0
+ 10.5 -0
100
-.
+ 7.0 -0
+ 14.5 -0
6.1.2.2
Flanges
not integral
Thickness
with valves and fittings: Not Machined at Back
Machined at Back
Up to 35 mm inclusive
+ 1.5 -0
t-3 -0
Over 35 mm
+3 -- 0
+5 --- 0
6.1.2.3
Forged
steel flanges
Thickness
of
Not Machined at Back
+ 1.5 -0 -t 3 -0
Over 35 mm thick Length
with valves and fittings:
Machined at Back
Up to 35 mm inclusive
6.1.3
integral
+3 -0 i- 3 -0
( h, ) -- shall be as given below:
Welding Neck Range
Machined Up to 80 mm nominal
size inclusive
Over 80 to 250 mm nominal Over 250 mm nominal
size inclusive
size
f
1.5 mm mm
k2 f 3
mm
6.2 Finish of Joint Surfaces -The finish ofjoint faces a.nd 11x type of gasket to he used are not specified in this standard due to the ITide rangy 8
L
IS : 75392- 1971 However, the recomof applidations for which the flanges can be used. mended joint face finish to be provid-ed on flanges used for steam, feed, water, and other fluids for which similar standards of joint tightness are required is as follows: a) Flanges Up to 300 mm Nominal Size Inclusive-A continuous spiral ,groove produced by a I.5 mm radius round-nosed tool at a feed of approximately 0.8 mm per revolution. b) Flanges Over 300 mm .Nominal SizeA continuous produced by a 3 mm radius round-nosed tool approximately 1.2 mm per revolution.
spiral groove at a feed of
6.3 Joint Faces y Steel flanges shall have raised joint faces except that blank flanges may be flat faced or have a spigot at the option of the manufacturer.
7. ATTACHMENT
OF FLANG-ES
7.1 The method of securing flanges ( other than the integral flanges ) to pipes and fittings shall be in accordance with the appropriate application standard. Where there is no application standard the method of attachment shall be the subject of agreement between the purchaser and the manufacturer. 7.2 Flanges machined according to the tolerances for attachment to pipe as in 7.2.1 to 7.2.3. 7.2.1 Screwed Flanges contracting parties.
These
shall Abe screwed
in 6 shall as agreed
be prepared
to between
the
7.2.2 Steel Plate and Steel Slip-On Boss Flanges - These shall be machined in the bore to a diameter to be specified by the purchaser and suitable for welding to form one of the types in the appropriate application standard as required by the purchaser. The purchaser shall specify the weld preparatio? required. 7.2.3 Welding Neck Flanges-These shall be machined in the bore to a diameter to be specified by the purchaser, and suitably prepared for welding to pipes and fittings. The thickness of the portion of the flange which connects it to the pipe should be not less than the pipe thickness nor more than 3 mm thicker. If the difference is more than 3 mm, it may be ncgotiatcd in a slope of 1 in 5. B. HYDRAULIC
TESTING
OF
FLANGES
B.l This standard does not specify the hydraulic test pressures for flanged pipes or components, details which should be obtained from the appropriate standards wl,ich specify test pressures for pipes or components but the test l>i‘cssure ::pplied to the joint shall not exccerl I.5 times the nominal pressure for the flanges. 9
IS : 6392 - 1971 9. INSPECTION 9.1 The purchaser or his representative shall have free access at all reasonable times to those parts of the manufacturer’s works actually engaged upon his contract and shall be at liberty to inspect at any stage of manufacture the materials covered by such contract. He shall be at liberty to reject any material which does not comply with the requirements of this .standard. 9.1.1 When the purchaser or his representative desires to witness the specified tests on the materials covered by his contract, the manufacturer shall notify him sufficiently in advance of the tests to enable him to be present. 9.2 Defects which do not impair the strength of the flanges may be welded by a procedure approved by the purchaser. They shall be cleaned out to sound metal before welding, and shall be submitted to the purchaser’s inspector for approval in this condition, after which they may be welded if the purchaser so agrees. After welding, flanges shall be heat-treated, except that welds required for finish- and appearances only need ‘not be heat treated, if approved by the purchaser. When the welding of defects is permitted, the welding rod shall be such as to produce a weld having characteristics similar to the parent metal. 10. DETAILS
TO BE SUPPLIED ORDERING FLANGES
BY
THE
10.1 The following information shall be supplied placing an order or making an enquiry:
4
PURCHASER
WHEN
by the purchaser
when
Nominal size, nominal pressure, type of flange (including type of screwing whether taper or parallel ) ( see Tables 2 to 42 ) and materials ( see Table 1 ) ;
b) Whether test certificates of the material are required; c) Details of bolting ( if required ) ( see 2.2 ); 4 Whether flanges are to be machined (see 5.2 and 5.2.1 e) Details of the machining for the attachment of flanges
); and ( see 7 ).
11. MARKING 11.1 Flanges marked
manufactured in accordance as in 11.1.1 to 11.2.
11 .l .l Manufacturer’s
with
this specification
shall be
name or trade-mark.
11 .1.2 Class Rating - Numerals ‘which the product is designated.
giving the primary
service
pressure
for
11.1.3 Muferials Idenf$xfion Carbon steel flanges shall be marked with the word ‘ Steel ‘. Alloy steel flanges shall be marked with the symbols designated in Table 1. 10
L
IS : 6392 - 1971 11 J.4 Thread Identification - The marking shall be cast or stamped on the flanges to indicate the type of thread used. For details reference may be made to IS : 1367-1967*. 11.1.5 Size markings
Numerals denoting the nominal pipe but may be omitted from reducing flanges.
size in
mm
size
11.1.6 Omission of Markirlgs - On flanges of such’ size or shape as will not permit of full markings, those may be omitted with the approval of the purchaser keeping the minimum the markings as under: a) b) c) d)
Size, Materials specification, Class rating, and Manufacturer’s name or trade-mar.k.
The remaining if required.
information
11.2 Flanges conforming 1,$1 Certification Mark.
should be made available
to this standard
may
to the purchaser,
also be marked
with
the
use of the ISI Certification Mark is governed by the provisions of the NOTE-The Indian Standards Institution ( Certification Marks )-Act and the Rules and Regulations made thereunder. The ISI Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under-a well-defined system of inspection, testing and qualit control which is devised and supervised by ISI and operated Ly the producer. IS{ marked products are also continuousl checked by IS1 for conformity to that stand& as a further safeguard. Details o P conditions under which a licence for the use of the ISI Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.
PRESERVATION
12.
12.1 After inspection,
AND
PACKING
and before
despatch,
flanges
shall,
if necessary,
be
dried and cleaned. 12.1.1 approved at 65°C.
Threaded and machined rust preventive material
surfaces shall be well-covered with an that will not become fluid and run off
12.1.2 Exposed faces of flanges shall be protected over their entire surface with a suitable close-fitting protector securely attached at not less than four points. The type of protector and method of attachment shall be approved by the purchaser. 12.2
Pactillg
12.2.1 Flrr,nges shall be bundled by bolting them together or securing them with wire of suitable strength passed through the bolt holes in such a manner that the flanges are paired and no flange facings remain exposed. 12.2.2 Other methods of preparation for despatch shall agreement between the purchaser and the manufacturer. *Technical
supply conditions for threaded fasteners (first rcui&r ).
11
be subject
to
,
Is : 6392 : 1971
TABLE
2
WELDING
NECK FLANGES
( claI4.ws4.1 and 5.1 ) Nominal
pressure W25 N/mm’J.
All dimensions in millimetres. NOTE - For nominal sizes 10 to 1 000 mm, use Table 4.
*These dimensions are not to scale.
NOM SUE
PIPE 1 o. d. -dl
1
FRAISEDFAC E BOLT-I I ING
FLANGE
b
D .C
No.
4
--
DRILLING
--
NECK
-
k 4 - _- -
4
h2 =
, b.
1 200
1 220
1 375
26
70
M27
32
30
1 320
1 245
16
16
1 400
1420
1 575
26
70
M27
36
30
1 520
I 445
16
16
1 600
1 620
1’790
26
80
M27
40
30
1 730
1 645
20
16
1 800
1820
1990
26
80
M27
44
30
1 930
1 845
20
16
2 000
2 020
2 190
26
80
M27
48
30
2 130 2 045
22
16
-
12
IS : 6392 - 1971
TABLE
3
PLATE
FLANGES
FOR
WELDING
( Clauses 4.1 and 5.1 )
Nominal
pressure
All dimensions NOTE
*These
dimensions
-
For
nominal
0.25 N/mm2. in millimctrrs.
sizes 10 to 1 000 mm, use Tat !r 5
are not to scale.
NOM SIZE
PIPE o. d.
RAISED FACE
FLANGE
I
--
4
b
D
--~
I
I)RILLIXG
BOLTING
No.
4
4
_- ----
--
k -~.
1 200
1 220
1 375
36
1 280
M27
32
30
1 320
1 400
I 420
1 575
42
1 480
M27
36
30
1 520
1 600
1 620
1 790
46
1 690
M27
40
30
1 730
1 800
1 820
1 990
52
1 890
M27
44
30
1 930
2 000
2 020
2 190
50
2 a90
1
ML; 13
2 130
TABLE
4
WELDING
NECK
( Cln~cses A. 1 crw’ 3.1
‘\I1 dimensions
*These
dimensions
are not to scale. c
FLANGES
)
in miliimctres.
.. 09
ii I
IS : 6392 -
1971 TABLE
5
PLATE
FLANGES
FOR
WELDING
( Clauses 4.1 and 5.1 ) Nominal
pressure
All dimensions
i\;OM
PIPE
SIZE
0.
10 15 20 2.5 32 40 50 65 80 100 125 150 ‘00 ‘50 3rio 370 400 500 600 iO0 :XJO 900
1 000 1 200 1 400 I 600 1 800 2 000
cl.
T-
FLAN(:E
-
d!
b
li ‘I 21.3 26.9 33.7 42.4 48.3 6C.3 76.1 88.9 114.3 139.7 16;‘,.3 216.1 273 323.9 357.6 4&,.-i X8 GUY6 ill.2 812.8 914.4 1016 1 220 1 420 1 62.0
12 12 14 14 16 16 16 16 18 18
1 11211 2 020
0.60 N/mm?.
in millimetres.
ii 90
100 120 130 140 160 190 210 240 265 320 375 -I 10 490 540 645 755 860 975 1 07.5 1 175 1 405 1 1130 1 830 2 04.5 2265
:?I 22 24 24 26 28 z: 34 38 42 46 56 66 74 :v 92
T JOLT. T ING
.-
.3110 Ml0 Ml0 hfl0 Ml2
35 40 50 60 70 80 90 110 120 148 178 202 258 312 361 415 465 5iO 670 775 880 980 1 080 1 295 1510 1710 1 920 2 125
Ml2 Ml2 Ml2 Ml6 Ml6 hI16 Ml6 RI16 hllG M20 M20 A120 M20 IL124 M24 M27 M27 h127 M30 M33 hI33 hr3r: b’I”Y I . i
F
1’
NO.
4 4 4 4 4 4 :: 4 4 8 8 8 12 12 12 :: 20 24 ;t 28 32 3G 40 44 48
k
11 11 11 11 1-I 14 14 14 18 18 18 18 1: 22 22 22 z: 26 30 _;; 33 36 36 39 42
5c
5_ 62 7:’
9s 100 110 130 150 170 200 225 280 335 + 39.5 441 495 coo 705 810 920 1 020 1 120 1 340 1 560 1 760 1 970 2 180
IS : 6392 - 1971 TABLE
6
SCREWED
BOSS
( Clauses 4.1 and Nominal
pressure
All dimensions
NOM
SIZE
PIPE o. d. dl
0.60
N/mm2.
in millimetres.
_-
.-
-
I
1RAISED FACE
FLANGE
FLANGES
5.1 )
-
I1 I
D
b
h
(14
.f
10.2 13.5 17.2 21.3 26.9
65
:: 50 65
33.7 42.4 48.3 60.3 76.1
100 120 130 140 160
14 14 14
1:: 125 150
88.9 114.3 159.7 165.1
190 210 240 265
1G 16
:: 20 25
:: f
X
tt 12 12 14
18 18 z: 24
z 40 50
128 148. 178 202
17
4
NO.
Boss d3
k
.-
Ml0 Ml0 Ml0 Ml@ Ml0
25
t: 34 40 44 44
-
.-
-_
I
DRILLING
ING
6 8
-
3OLT-
11
18
ii !l 11
:‘5 30 40
Ml0 Ml2 hi12 Ml2 Ml2
-? 4 4 4 4
11 14
MlG Ml6 Ml6 Ml6
4 % 8
50 60
:: 14
;z 100 110 130
;: 100
18 18 13 18
150 170 200 225
110 130 160 185
P
IS
:
6392
-
1971 TABLE
7
SLIP-ON
BOSS FLANGES
( Cfauw Nominal
pressure
All dimensions
WELDING
O-60 N/mm*. in millimetres.
RMSEDFACE
Pm3
FOR
4.1 amd 5.1 )
BOLT-
1
DRILUMO
o. d.
c9P
6 8 10 :;
4 25 30
IO.2 13.5 17.2 21.3 26-9
z 50
Ml0 Ml0 Ml0 Ml0 Ml0
4
11
t
II 11
40 45 50
t
f:
:z
4 4 4 4 4
14 11
G
14 FQ
E I30
’ 4
:
18 18 18 I8 18
150 170 200 223 280
:;
:z
335 395
z:
33.7 42.4 48.3 60.3 76.1
100 120 130 140 160
1:
MI0 Ml2 Ml2 Ml2 Ml2
80 100 125 150 200
88.9 114.3 139.7 1683 219.1
190 210 240 265 320
128 168 178 202 258
Ml6 Ml6 Ml6 Ml6 Ml6
312 365
Kft6 M20
25 32 40
250 300
375 440
60 z
18
:
IS : 6392 - 1971 TABLE
8
LOOSE
FLANGES
FOR
WELDED
ON LAPPED
PIPE
ENDS
(cfulI.rcr 4.1 and 5.1 ) Nominal pressure O-60 N/mm*. All dimensions in millimetres.
NOM SIZE
r4 r
-I-
PIPE o. d. 4
17.2 21.3 26-9 33.7 42.4 48.3 60.3 76.1 88.9 114.3 139.7 168.3 219-l 273 ‘323.9 355.6 419 508 609.6 711.2 812.8 91414 I 016 1 220
FLANGE
El 1z 120 E 160 190 210 % 320 375 440 490 540 645 755 860 975 I 075 I 175 L405
6
::
IO 12 12 f: if 14 :9 18 z: 26 30 32 36 40 44 48 2:
No.
c
Ml0 Ml0 Ml0 Ml0 Ml2 Ml2 Ml2 Ml2 Ml6 Ml6 Ml6 Ml6 Ml6 Ml6 M20 M20 M20 M20 M24 M24 M27 M27 M27 M30
if:
E
46
z’5 81 1:: 145 174 225 279 330 362 426 516 618 720 822 926 1 02e 1 232
19
I
DRILLING
BOLTING
D
-
4
4 t
::
k
65
t 4
:: 14
t 4 4 8
:t
zz 100 110 130 150 170 200 225
: 12 12 12 ::
:!I 18 :; 22
is
;; 26 36
::: 28 32
:I: 30 33
-
da Ma.%
2: 2 50
11
::
PIPE END
335 395 445 495 600 705 810 920 I 020 I 120 I 340
60 70 80
1:: 128 148 178 202 258 312 365 415 465 570 67a 775 88C 98C 1 08C 1 29:
r
3 : 4 4 5 5 3 5 : z 6 f f 6 E 8
TABLE
9
PLATE
BLANK
c ..
FLANGES
( ClUUS?S 4.1 and 5.1 ) Seminal
prc~ure
.A11dimensions
S
I
in millimetres.
-KCJTE - The tlvo t! pt-s of flanges shown are .~ltcrnativrs pq-dz
3
0.60 K/mm’. at the option
of the manufacturer.
G’J
5 2
bl
LO+------4
-
FobM B
FOPM A
FLASCE
I)
-I-
is
--
b
I
SPIGOT
90 100 120 130 140 160 190 210 240 265 2% 320 3i5
l! I! l-1 14 14 14 IG !F 18 18 20 20 22
440 490 5-10 I-I -.
G 22 nl
c
--
--
I:! 1L’
80
BOLTING
4
-_ 55
70 90 115 140 165 190 237 285 332 380
Ml0 Ml0 Ml0 Ml0 Ml2 A112 Ml2 Ml2 Ml6 MIC MlG Ml6 MIG Ml6 Ml6 M20 .M20 M20
DRILLING
_-
1.
zs
65
:o” 100 110 130 150 170 200 225 255 280 335 395 445 495
IS : 6392 - 1971 TABLE
10 WELDING
NECK
( Clauses 4.1 and5.1
FLANGES )
Nominal pressure 1 N/mm*. 411 dimensions in millimetres. NOTE -
*These JOM
iIZr.
dimensions
-
_
n
'14
_
340
400
219.1 273 323.9 3.j?‘(‘, 406.4
500 600 7 0’) 80:: 900
508 ti09.1; 711.2 *;12.8 914.4
670
0:io 280 ‘100 tioo 800 000
250
Y)O 3iO
- --
R:AISED
FLANGE
-200
sizes 10 to 175 mm, use Table
arc not to scale.
-
PIPI?. o.d. (11
For nominal
:
-
FACI 1 1SOLTING -
f -
268 320 370 430 192
hI20 M’O M20 ?.420 SI:! !
730 89 .Y) 101-l 1 1 1.-I
5fii c,U.! 301) 90.-J 1 001)
342 I M27 1127 1130 M30
01,; 2’0 420 620 820
1 231) 1 4.53 1 675 191-l 2 115
1110 1 330 1 53.5 1 76il 1 9tio
M33 h43ti h139 M4.i M45
020
2 3Li
2 170
M4 ‘:
3!li 4li
.,u:i .3x
I
21
16.
I
NECK
IS : 6392 - 1971 TABLE
11
PLATE
FLANGES
FOR
WELDING
( Clnusrs 4.1 nad 5.1 )
Nominal pressure 1 N/mm2. All dimensions in millimetres. NOTE-For
nominal sizes 10 to 175 mm, use Table
17.
*These iiimensions are not to scale.
NOM SIZE
PIPE o. d.
d,
-
T
FLANGE
--
I
RAISEU FACE
T I
hILLIN‘
No.
f
D
-
BOLTING
k
_200 250 300 350 400
219.1 273 323.9 355.8 406.4
340 395 445 505 565
268 320 370 430 482
M20 M20 M20 M20 M24
500 600 700 800 900
508 609.f.j 711.2 812.8 914.4
670 780 895 1015 1115
585 685 800 905 1 005
M24 M27 M27 hi30 M30
016 220
1 230 1 455
1110 1 330
M33 M36
1 000 1 200
22
295 350 400% 460 515 620 725 840 950 1 050 28 32
1 t60 1 380
lS x6992 - 1971 TABLE 12
SLIP-ON BOSS FLANGES FOR WELDING ( Chue~ 4.1 and 5.1 ) Nominal pressure 1 N/mm*. All dimckonr
N--Far
in millimetres.
nominal sires 6 to 65 mm inchkvc,
UK Tab!e 19.
TAPER 1 IN 6.25 ON DIAMETER
NOM
SIZE
PIPS d. dr *
o.
I
FLANGS
BOLT-
Boss d,
hILLlNG
ING
n
b
A
4
I
t
NO.
80
88-9
200
~20
34
138
MIG
8
18
160
118
100
114.3
220
20
40
158
Ml6
8
18
180
140
J25
i39-7
250
22
44
188
Ml6
8
18
210
f68
150
168.3
285
22
44
212
MM
8
22
240
195
200
219-l
340
24
44
268
M20
8
22
295
237
250
273
395
26
46
320
M20
12
22
350
292
300
323.9
445
26
46
370
M20
12
22
400
344
i 23
IS : 6392- 1971 TABLE
13
LOOSE
FLANGES
FOR
WELDED-ON
LAPPED
PIPE ENDS
( Clauses 4.1 and 5.1 ) Nominal pressure 1 N/mm:!. All dimensions in millimctres.
-
-
NO.
c?
17.2 21.3 26.9 33.7 42.4
115 140
:; 100
48.3 60.3 76-l 88.9 114.3
150 165 185 200 220
52 65 81 94 119
Ml6 Ml6 Ml6 Ml6 Ml6
125 150 200 250 300
139.7 168.3 219.1 273 323.9
250 285 340 395 445
145 174 225 279 330
Ml6 M20 M20 M20 M20
10 :z 23 32 40 50
Ml2 Ml2 Ml2 Ml2 Ml6
E 105
24
4 _-
--
_-
PIPE END
-
-iD
I
DRILLING
BOLTING
FLANGE
PIPE o. d. dl
NOM SIZE
k
-
d4
MOX
L
14 14
40 45
;: 18
:: 78
4 4
18 18
: 8
:: 18
110 125 145 160 180
1:: 122 138 158
210 240 295 350 400
188 212 268 320 370
TABLE
14
PLATE
BLANK
FLANGES
( Clauses 4.1 and 5.1 ) Nominal
prrssurc
All dimensions SOTE NOTE
12 -
The
t\vo types of flanges
For nominal
shown
1 N/mmj.
in millimctrcs. arc alternatives
sizes 10 to 175 mm, USCTable
at the option
of the manufacturer.
20.
PPROX
FORM
NOM
FORM
A
FLANGK
SPIGOT
SIZE
8
BOLTIn-G
DRILLING
ds
D
b
NO.
dz
k
IS:6392-1971 TABLE
,15
INTEGRAL
( Clauses 4.1 and
FLANGES 5.1 )
Nominal pressure 1.6 N/mms. All dimensions in millimetres. NOTE-
NOM SIZE
T
FLANGE
-
.-. D 5: 100 125 150 175 200 250 300 350 400 500 600 700 800 900 1000 1200 1400 1600 1800 2 000 2 200
185 200 220 250 285 315 340 405 460 520 580 715 840 910 1025 1 125 1255 1485 1 685 1 930 2 130 2 345 2 555
_-
b -ii--
20 ;: 22 :% 26 28 30 32 :x z
-
tz 52 58 64 68 70 74
I
For nominal sizes 10 to 50 mm, use Table 26.
RAISED FACE d4 122 138 158 188 212 242 268 320 378 438 490 610 725 795 9;oo 1 000 1115 1 330 1 530 1 750 1 950 2 150 2 360
BOLTING
f Ml6 Ml6 Ml6 Ml6 M20 M20 M20 M24 M24 M24 M27 M30 M33 M33 M36 M36 M39 M45 M45 M52 M52 M56 M56
26
DRILLING
-iNo.
_
-
dz
_
NECK
k 145 160 180 210 240 270 295 355 410 470 525 650 770 840 950 1 050 1 170 1 390 1 590 1 820 2 020 2 230 2 440
r
93 110 130 159 184 211 236 290 342 396 448 554 660 760 864 966 1070 1278 1 488 1 696 1902 2 106 2 312
5
2
6 6 f
t 8 10 10 :4 12 12 12 :z 18 18 ;:
*
TABLE
l6
WELDING
NECK
FLANGES
( Clauses 4.1 and 5.1 ) Nominal
pressure
All dimensions
*These
dimensions
I.6 N/mma.
in millimetres.
are not to scale.
-
NOM
PIPE o. d. dl
SIZE
FLANGE
D
RAISED FACE
hl
BOLTING
I
DRILLING No.
4
NECK
k
4
_17.2 21.3 26.9 33.7 42.4
iii 105 115 140
48.3 60.3 76.1 88.9 114.3
150 165 185 200 220
125 150 175 200 250
139.7 168.3 193.7 219.1 273
250 285 315 340 405
300 zz 500 600
323.9 355.6 406.4 508 609.6
460 520 580 715 840
700 800 900 1 000 L 200
711.2 812.8 914.4 1016 1220
910 1 025 1 125 1 255 1 485
1 400 1 600 1 800 2 000
1 420 1 620 1820 2 020
1 685 1 930 2 130 2 345
58 68 78
Ml2 Ml2 Ml2 Ml2 Ml6
:z 100
88 102 122 138 158
Ml6 Ml6 Ml6 Ml6 Ml6
110 125 145 160 180
;z 105 131
188 212 242 268 320
Ml6 M20 M20 M20 M24
210 240 270 295 355
156 184 210 235 292
378 438 490 6 10 725
M24 M24 M27 M30 M33
410 470 525 650 770
344 390 445 548 652
100 105 110 120 130
795 900 1 000 1115 1 330
M33 M36 M36\ M39 M45
840 950 1 050 1 170 1 390
755 855 955 1 058 1 262
:: 22 30
145 160 170 180
1 530 1 750 1 950 2 I.50
M45 M52 M52 M56
1 590 1 820 2 020 2230
1 4G5 1 668 1 270 2 072
30 35 35 40
E 38 38 40 42 45 45 ::
78 82 85 ::
ti
60 65
5:: 58 32 36 40 1;:
28 z:, 45 56 64
:: 16 16 18 18
As in the Original Standard, this Page is Intentionally Left Blank
1d:6392 -1971 TABLE
17
PLATE FLANGES FOR ( Clallses 4.1 ond 5.1 )
WELDING
Nominal pressure 1.6 N/mmz. Ail dimensions in millimetres.
*These dimensions are not to scale.
NOM
SIZE
:i
20 :z 40 2: 1:: 125 150 175 200 250 300 350 400 500 600 700 800 900 1 000 -1 200
PIPE o. d. dl
17.2 21.3 26.9 33.7 42.4 48.3 60.3 76.1 88.9 114.3 139.7 168.3 193.7 21911 273 323.9 355.6 .406.4 508 609.6 711.2 812.8 914.4 1016 1 220
RAISEDFACE
FLANGE
D
b
is
105 115 140 150 165 185 200 220 250 285 315 340 405 460 520 580 715 840 910 1 025 1 125 1 255 1 485
-
BOLTING
f
4 40 45 58 68 78 1:; 122 138 158 188 212 242 268 320 378 438 490 610 725 795 900 1 000 1115 1 330
29
I
DRILLING
No. Ml2 Ml2 Ml2 Ml2 Ml6 Ml6 Ml6 Ml6 Ml6 Ml6 Ml6 M20 M20 M20 M24 M24 M24 M27 M30 M33 M33 M36M36 M39 M45
k
60 7”,” 1:: 110 125 145 160 180 210 240 270 295 355 410 470 525 650 770 840 950 -1050 1 170 1 390
IS : 6392 - 1971 TABLE
18
SCREWED
BOSS
FLANGES
(Clauses 4.1 and 5.1 ) Nominal
pressure
.411 dimensions
1 and
1.6 N/mm?.
in millimetres.
d, +-----+_I
t--
TAPER 1 IN 6.25 ON DIAMETER
-
NOM
PIPE
SIZE
o.
d.
dl z=z
FLANGE
/
80 100 125 150
R.AISED FACE
_.
b
D
_ G 8
-
-
I1
75
10.2 13.5 17.2 21.3 26.9
10.3
12 12 14 14 1G
33.7 42.4 48.3 60.3 76.1
11.5 140. 150 lG5 185
1G 16 16 18 18
88.9 114.3 139.7 165.1
200 220 250 28.5
20
95
BOL.TING
I so.
f
I
I)RILLISG
Boss
dz
A
11
50 5.5
&I12 Ml2 Ml2
:: 14 14
GO 65 7.5
14 18
1:: 122
hl12 MlG Ml6 MlG Ml6
138 158 188 212
Ml6 Ml6 hflG %I20
4
__
-80 90
I
- -
:: 22
18 18 ;i 24
XI10
:: 58
G8 78
34 40 44 44
30
hIi
1: 18 8 : 8
18 18
20 25 30 35 45
85 100 110 125 145
52 GO 70 85 105
160 1RO 210 240
1I-8 140 lG8 195
+.
IS I 6392- 1971 TABLE
19
SLIP-ON
BOSS FLANGES
FOR WELDING
( Chuicr 4.1 and 5.~1 ) Nominal pressure 1.6 N/mm’. All dimensions in millimctres. Norr pressure.
Use this table also for nominal
sizes 6 to 65 mm for 1.0 N/mm2
nominal
-,_++I
Now
SlZE
PIPE o. d. dt S
I
DNLLINO
FLANGE
b
I)
.-
d:,
I i-
I
l”oZ
12 12 14 14 16
18 18 20 20 24
115 140 150 165 185
16 16 16 1u 18
;: “6 28 32
1% 130-7 168.3 419.1
200 220 2w 285 340
;: 22 22 24
ZJ
273 323.9
405 460
26 28
10.2 I3..5 17.2 21.3 26-3 [!n . i 42.4 48.3 CO.3 76.1
75 t
k!
No.
I1
MI0
45 58
MI0 h112 h412 Ml2
G8 7P,
-4 : 4 4
II II 14 14 14 14 In
1:; 122
t: 18
f :: 44
130 158 188 212 268
hllG Mlci Ml6 h12O M20
46 46
320 378
M24 M24
k
dz
__
SO 55 60
65 75 1% 110 125 145
18 z 22 22
20 25 30 35 45
1: 210 240 295 355 410
118 140 168 195 247
TABiE
20
PLATE BLANK FLANGES ( CkUUSCJ4~1 d 5.1 )
Nominal pressure 1.6 K/nml*. All dimensions in millimetres. Norm -- The two types of Ranges shown arc alternatives at the option
FORM A
w r.l
I-
FORM
51 .. a ;g
of the manufacture:.
B
-
FL.tNGE
SPIGOT
BOLTING
DRILLING
4
n
b
No.
-
90 95
IO3
115 140 150 165 185 200 L” 0
55
2
250 285 315 340 405 28 30 32 36
460 520 580 715 t
Ml2 Ml2 Ml2 h112 Ml6 Ml6 Ml6 Ml6 h116 MlG
115 140 165 190 237
Ml6 h
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