Sarawak Shell Berhad Sarawak Shell Berhad
Sabah Shell Petroleum Company Limited Sabah Shell Petroleum Company Limited
STANDARD ENGINEERING
STANDARD ENGINEERING SPECIFICATION
SPECIFICATION
DRAFT DRAFT SES 10.1 SES 10.1 Rev. 3 Rev. 3 Page 107 Page 107 APPENDIX APPENDIX APPENDIX IX APPENDIX IX DESIG
DESIGN BRN BRIEFIEF FOR FOR ATTACHMENTS ATTACHMENTS
_._.
LIFTING LIFTING
Sabah Shell Petroleum
STANDARD
ENGINEERING SPECIFICATION
DRAFT SES 10.1 Rev. 3 Page 108 APPENDIX I: INDEX 1 .0 INTRODUCTION 2.0 DESIGN PHILOSOPHY 2.1 Definition of Terms
2.2 Basis for Design
3.0 CALCULATION OF FACTORED WEIGHT
4.0 DISTRIBUTION OF SLING LOADS
4.1 Decks, Modules, Packages
4.2 Jackets
5.0 SLING SHACKLE SELECTION
5.1 Sling Selection
5.2 Shackle Selection
6.0 LIFTING ATTACHMENT DESIGN
6.1 Lifting Attachment Design Load
6.2 Permissible Stresses 6.3 Hole 6.4 Bearing Stress 6.5 Cheek Plates 6.6 Pull-out Shear 6.7 Tension Failure 6.8 out-of-Plane Loading 6.9 Combined Stresses 6.10
7.0 TRUNNION TYPE LIFTING POINTS
FIGURE IX ALLOWABLE
FIGURE IX 2. LIFTING EYE DETAILS
FIGURE IX 3. TRUNNION DETAILS
Sarawak Shell Berhad
Compdny Limited
LIFT.
AND
Size
Niscellaneous
Sarawak Shell Berhad Sarawak Shell Berhad
Sabah Shell Petroleum Company Limited Sabah Shell Petroleum Company Limited
STANDARD ENGINEERING SPECIFICATION
STANDARD ENGINEERING SPECIFICATION
DRA FT SES 10.1 DRA FT SES 10.1 Rev. 3 Page 110 APPENDIX 1
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 d i s t r i b u t e d a s d e f i n e d i n s e c t i o n 4 . 0 . No increases in allowable stresses shall be applied.
2.2.2 Steelwork
a n d a n d i m m e d i a t e l y a d j a c e n t s truct ural l oad beari ng s t ee lw ork s hall be de si g ne d fo r
loads resulting from the
with the sling loads distributed as section 4.0. This
l o a d w i l l b e d e f i n e d a s t h e “ l i f t i n g a t t a c h m e n t d e s i g n
N o i n a l l o w a b l e s t r e s s e s s h a l l b e a p p l i e d . Allowable st resses are defi ned in Section 6.2.
2.2.3 Shackles
The shackles shall be checked for the loads resulting from t h e f a c t o r e d l i f t w e i g h t ( s e c t i o n 2 . 1 . 2 ) d i s t r i b u t e d i n accordance with section 4.0. No additional impact factor s h a l l b e u s e d , t h i s i s c o v e r e d b y the shackle 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 f a c t o r e d l i f t w e i g h t ( s e c t i o n 2 . 1 . 2 ) . d i s t r i b u t e d t o t h e 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).
weight
Padeyes/padears/trunnions and ImediatelL&djacent
Padeyes (padears trunnions)
design lift weight (section 2.1.3)
In
a8
S J
.a I
SES 10.1
Sabah Shell Petroleum Company Limited
APPENDIX
STANDARD ENGINEERING
SPE
3.0 CALCULATION OF FACTORED LIFT WEIGHT
The factored lift weight and COG position shall be established the basis of weight control reports,
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
4.1 DECKS, MODULES, PACKAGES
Rotation of the structure about any horizontal axis upon lifting
should be limited As far as possible equal 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 shackle connections.
shall be limited to an absolute minimum of 60 degrees.-
-centre of gravity at a late stage, the calculation of design load shall include for the effect of the centre of gravity 1
..I
or
reflecting accurate weight taks
bc
01
an<
SLING LOADS
t o L lengtt
IZ7ii?-of level occurs in one directior on y this
after
usa tc
The angle between the sling and horizontal ~ ;-.--- -_,.-_,_.. _
-,T-.,..--.-To allow for the possibility of a change in the position of the
sling shiftin
metre in any direction.
..~d.
Sarawak Shell Berhad
SES 10.1Sabah Shell Petroleum
Company Limited
STANDARD ENGINEERING SPECIFICATION
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 5.1
5.1.1
SLING AND SHACKLE SELECTION
SLING SELECTION 7
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 sling 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.
Sling Factor of
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.
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
All shackles should be provided with a valid and
c e r t i f i c a t e w h i c h d o c u m e n t s t h e r a t i n g o f t h 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.
DUFT
--.
// -,
r e c e n t
certificate which documents the Safe Working Load (SWL he sling
(MBL) Safety,,- SEACKLE SELECTION _L ecen .shackle e sha k
Sarawak Shell
Berhad
APPEN DIX
5.2.1 Shackle Rating and Factor of Safety
Shackles shall be selected on the basis of the shackle rating being in excess of the sling load determined from the factored lift weight (d i st ribut ed as de scribed in s e ct io n 4.0) and t h e l i m it at i on s o n b en d r ad i us gi ve n a bo v e. T h e u l ti m at e ca p ac i ty o f th e sh a ck l e should exceed the shackle 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 . s e c t i o n 4 . 0 ) d e t e r m i n e d o n t h e b a s i s o f f a c t o r e d l i f t w e i g h t ( r e f . s e c t i o n b y a 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 o f
, this load.
6 . 2 P e r m i s s i b l e S t r e s s e s
P e r m i s s i b l e s t r e s s e s s h a l l b e a s d e f i n e d i n A . I . S . C . w i t h t h e 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.
-6.3 Hole size
The pin hole diameter shall be the greater of : Pin diameter plus
Pin diameter 1.05. The
Pin diameter plus
i
Sabah
Shell Petroleum Company Limited
EERING SPECIF
,, :* 2.1.2) shall be multipled
;/
padeye sh al l al so be de si g ne d f or a l at e ral l oad of at le as t 5Z
:-not ycbLzCjrt& ‘C;;)ew. -k 3mm i)
in hofe diameter shall be less than :
i) 6n
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 NDAR b NGINEERIN..G ‘i,,,/” 6.10.1 Notati. , r \ . /’ .10.2 l
line bored as one unit. Tolerance on hole diameter shall be -0 + Flame cut holes shall not be allowed.
6.10.3 E d g e ‘I
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
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
However the ‘side loading shall be minimum of of the lifting attachment design load applied perpendicular to the at the extremity of the keeper plate.
f o r c e t o d i f f e r e n c e i n s l i n g l o a d s s h a l l b e c o n s i d e r e d b y 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 : T h e c e n t r a l s t i f f e n e r p l a t e ( s h e a r p l a t e ) w i l l b e s l o t t e d t h r o u g h t h e m a i n p l a t e o r t u b u l a r a n d b e d es ig ne d to t ran sf er t he to t al l if ti ng att ach me nt
load into the main plate or tubular, not taking into account the
w~ce‘~~ ‘.\,___>.. ‘\L/
I---, p?@ sling diameter shall be provided
padeye
the’main
main
llhqa.
Trunnions shall be designed following the criteria of Section 6.
5I
trunnion An additional out of balance
d i) padear w+ll zdesign trunnions. ..r
Sarawak Shell
Sabah Shell Petroleum Company Limited
APP END IX
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.
iii) As the sling will flatten out at the contact area during 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 1.5 times the sling diameter will be provided between the ‘keeper plate and any stiffeners or other projections. If, however the keeper plate is bolted o n a f t e r i n s t a l l a t i o n o f t h e s l i n g s , t h e n t h i s c l e a r a n c e p i p e a n d a n y o t h e r
Al l sharp damage the sling during handling and transportation will be to a minimum of 5 mm.
I Beri;ad 25~~0. mm centre wil. a p p l y b e t w e e n t h e trunnion edge~~~likely to’ radiused
.
Sarawak Shell Berhad
Sabah Shell
Petroleum Company Limited
RING SPECIFICATION.
SES 10.1 APPENDIX I. WIDTA OF SHACKLE W IRADIUS MAIN PLATE 1
CLEARANCE
SLING
ACTUAL CHEEK PLATE THICKNESS < NOTE : EFFECTIVE
FIGURE IX-l : SHACKLE
_’
f
‘.
tl MAIN PLATE TEICICNESS l/lOW x l/SW
0.5ds
lm
ds TAMETER
0.75t1
CEEK PLATE THICKNESS 0.5tl
PADEYE DIMENSIONS
