Shell Lifting Attachments

Sarawak Shell Berhad Sabah Shell Petroleum Company Limited

STANDARD ENGINEERING SPECIFICATION

APPENDIX IX DESIGN

BRIEF FOR

 ATTACHMENTS

DRAFT SES 10.1 Rev. 3 Page 107 APPENDIX

  Shell Berhad Sabah Shell Petroleum

 Limited

STANDARD ENGINEERING SPECIFICATION INDEX

1 .0

2.0

INTRODUCTION

DESIGN PHILOSOPHY 2.1 2.2

Definition of Terms Basis for Design

3.0

CALCULATION OF FACTORED

4.0

DISTRIBUTION OF SLING LOADS 4.1 4.2

5.0

SLING 5.1 5.2

6.0

6.8 6.9 6.10

7.0

Decks, Modules, Packages Jackets

 SHACKLE SELECTION Sling Selection Shackle Selection

LIFTING ATTACHMENT 6.1 6.2 6.3 6.4 6.5 6.6 6.7

 WEIGHT

DESIGN

Lifting Attachment Design Load Permissible Stresses Hole Bearing Stress Cheek Plates Pull-out Shear Tension Failure out-of-Plane Loading Combined Stresses

TRUNNION TYPE LIFTING POINTS

FIGURE IX

ALL OW AB LE

GRA VI TY POSITIO N

FIGURE IX 2.

LIFTING

FIGURE IX 3.

TRUNNION DETAILS

EYE

DETAILS

DRAFT SES 10.1 Rev. 3 Page 108 APPENDIX I:

Sarawak Shell Berhad Sabah Shell Petroleum Company Limited

DRA FT

SES 10.1 Rev. 3 Page 110  APPENDIX 1

STANDARD ENGINEERING SPECIFICATION BASIS FOR DESIGN

2.2.1

General Structural Components The structure to be lifted shall be checked on the basis of  the design lift   (section 2.1.3) with the sling loads No increases in distributed as defined in section 4.0. allowable stresses shall be applied.   and

2.2.2

  Steelwork

  and   and immediately adjacent structural load bearing steelwork shall be designed for   lift weight (section 2.1.3) loads resul ting from the This with the sling loads distributed as   section 4.0. load will be defined as the “lifting attachment design No   in allowable stresses shall be applied.  Allowable st resses are defi ned in Section 6.2. 2.2.3

Shackles The shackles shall be checked for the loads resulting from the factored lift weight (section 2.1.2) distributed in No additional impact factor accordance with section 4.0. shackle the this is covered by shall be used, manufacturers rating:

2.2.4

Slings The slings should be sized such that the   of the sling is in excess of the sling loads evaluated on the basis of the factored lift weight (section 2.1.2). distributed to the slings in accordance with section 4.0. No additional impact factor shall be used   this is covered by the sling factor of safety (see section 5.1.1).

SES 10.1

Sabah Shell Petroleum Company Limited APPENDIX

STANDARD ENGINEERING SP E 3.0

CALCULATION OF FACTORED LIFT WEIGHT

The factored lift weight and COG position shall be established the basis of weight control reports, reflecting accurate weight taks offs and vendor data. The factors applied to base weights shall in accordance with Appendix XI.

If the structure or module is weighed at the completion fabrication, the weighed weight shall be increased by 3% compared to that used in the final lift analysis, to establish if further analysis is required, prior to offshore installation.

4.0

DISTRIBUTION OF

 LOADS

4.1

DECKS, MODULES, PACKAGES

Rotation of the structure about any horizontal axis upon lifting As far as possible equal should be limited  level occurs in one slings should be used.  may be adjusted by using pairs of equal length slings. Sling length may be adjusted by using link plates, or, discussion with the installation contractor by the  of shackle The angle between the sling and horizontal shackle connections. shall be limited to an absolute minimum of 60 degrees. -

-

To allow for the possibility of a change in the position of centre of gravity at a late stage, the calculation of design load shall include for the effect of the centre of gravity 1  in any direction.

..I

Sarawak Shell Berhad Sabah Shell Petroleum

SES 10.1

Company Limited

STANDARD ENGINEERING SPECIFICATION F o r c a s e s w h e r e t h e r i g g i n g   configuration has redundancy, an allowance shall be made in the calculation of sling load e.g. for 4 slings to   common block a 75% 25% load distribution in diagonal s li ng s s ha ll be as su me d. F o r ot h er r i g gi n g c on f ig u ra t i on s ( e. g . employing lifting frames or bars) the sling load distribution should be submitted for approval by SSB. 4. 2

 

JACKETS

When selecting slings for jacket lifts where the rigging arrangement has redundancy, (e.g. ‘4 slings to a common block) it shall be assumed that only three slings are active.

5. 0

SLING AND SHACKLE SELECTION

5.1

SLING SELECTION

7

sling   A l l s l i n g s s h o u l d b e p r o v i d e d w i t h a v a l i d a n d r e c e n t he sling  certificate which documents the Safe Working Load (SWL and the Minimum Breaking Load   of the sling. The condition of  the sling and the date and type of inspection used to evaluate the sling condition should be included on the certificate. 5.1.1

Sling Factor of 11 be applied to the sling safe working  required sling minimum breaking load

5.1.2 Bend Radius The eye of a single part sling shall not be bent around a diameter less than the slings nominal diameter.  Any other part of a sling bent around a diameter shall be derated in accordance with the manufacturers instructions. 5.2

 SELECTION

. shackle  All shack les shoul d be provided wit h a val id and certificate which documents the rating of the e and the shackles ultimate capacity. The condition of the shackles and the date and type of inspection used to evaluate the shackle condition should be included on the certificate.

Sarawak Shell Berhad

 Shell Petroleum Company Limited  APPEN DIX

5.2.1 Shackle Rating and Factor of Safety Shackles shall be selected in excess of the sling load (distributed as described b en d r ad i us gi ve n a bo v e. should exceed the shackle

on the basis of the shackle rating being  determined from the factored lift weight in section 4.0) and the limitations on T h e u l ti m at e ca p ac i ty o f th e sh a ck l e rating by a factor of safety of at least

6.0

LIFTING EYE DESIGN

6.1

Lifting Attachment Design Load T h e s l i n g l o a d ( r e f . section 4.0) determined on the basis of    shall be by a factored lift weight (ref. section f a c t o r o f 1 . 3 3 t o e s t a b l i s h t h e “lifting attachment design load”. I n a d d i t i o n t o t h e d i r e c t “lifting attachment design. load” the   shall also be designed for a lateral load of at least o f  this load.

,

6.2 Permissible Stresses Permissible stresses shall be as defined in A.I.S.C. with the following additional requirements Transfer of stresses through the thickness of the plate shall be allowed unless the material has through thickness properties. In this instance through thickness stresses shall be limited to 0.2 Fy. Combined - - - - -stresses (see 6.9) shall be less than 0.66 Fy. Hole size

6.3

The pin hole diameter shall be the greater of : Pin diameter plus Pin diameter The i

  1.05.

  diameter shall be less than : Pin diameter plus

Sabah Shell Petroleum Company Limited  APPENDIX I

Miscellaneous Drawing

\

The drawing should define the slings and shackles to be used and, the lifting attachment design load. Fabrication Procedure Cheek plates should be welded to the lifting eye main plate and line bored as one unit. Tolerance on hole diameter shall be -0 + Flame cut holes shall not be allowed. 6.10.3

Edge The minimum distance from the edge of the pinhole to the edge of  the main plate shall be one pinhole diameter.

6.10.4

Sling Clearance  A min imu m cl ear an ce of 0. 5   sling diameter shall be provided between the outside of the sling passing through the shackle and the edge of the   main plate. (See Figure 1X-l).

6.10.5

Weld Clearance Clearance should exist between the full penetration butt weld attaching the main plate to   leg tubular or main beam and t he f i ll e t we ld a r ou n d th e c he e k pl a te . I n o rd er to a ch ie ve sufficient clearance the distance between the edge of the cheek plate and the edge of the   tubular (or beam) should be at least the main plate thickness plus

7. 0

TRUNNION TYPE LIFTING POINTS

  shall be designed following the criteria of Section 6. However the ‘side loading shall be minimum of   of the lifting  attachment design load applied perpendicular to the at   additional out of balance the extremity of the keeper plate. force   to difference in sling loads shall be considered by applying 45% o f the lifting attachment design load in one sling  and 55% in the other sling. The following criteria (see Figure IX-Z) shall be adhered to : The   central stiffener plate (shear plate) will be slotted through the main plate or tubular and be designed to transfer the total lifting attachment load into the main plate or tubular, not taking into account the

Sarawak Shell Sabah Shell Petroleum Company Limited  APP END IX  I

STANDARD ENGINEER1 ii) The trunnion will be regarded only as a former and will not be considered as resisting the load. The diameter of the pipe will be three times the required sling diameter. i i i ) A s t h e s l i n g w i l l f l a t t e n o u t a t t h e c o n t a c t ar e a d u r i n g   l i f t i n g , the width of the stub will be 1.25 times the sling  diameter, plus iv) The keeper plate will protrude a distance not less than 75% of the sling diameter at the bearing area and at least 100   above the   of the pipe.  An overall clearance of provided between the If, other projections. on after installation   apply between

1.5 ti mes th e sling diameter will be ‘keeper plate and any stiffeners or however the keeper plate is bolted of the slings, then this clearance the   pipe and any other

 Al l sharp   damage the sling during handling  and transportation will be   to a minimum of 5 mm.

.

Sarawak Shell Berhad Sabah Shell

SES 10.1

Petroleum Company Limited APPENDIX I.

RING SPECIFICATION.

W

WIDTA OF SHACKLE

 MAIN PLATE

 x

I 1

RADIUS MAIN PLATE CLEARANCE

SLING ACTUAL CHEEK PLATE THICKNESS < NOTE :

EFFECTIVE

 PLATE THICKNESS

FIGURE IX-l : SHACKLE

 DIMENSIONS

SES 10.1

Sabah Shell Petroleum Company Limited  APPENDIX I

  min. if keeper plt.   bolted after’ sling inst.

installation clearance all round.

  Ix-2 :

DETAILS