procedures for usari fa
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8/11/2019 Procedures for USARI FA
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USARI IDOHO PIPELINES REPLACEMENT PROJECT 26/06/12
RISER INSTALLATION PROCEDURE at FA REVISION : REV 1
F10190-SAI-FAFR-OPS-PRO-0062671NG00-SA-OPZZZ-0062671 PAGE: 26/ 198
RESTRICTED INFORMATION: May not be copied or distributed without SPECIFIC AUTHORIZATION.Warning: This document as printed may not be the latest version. Please refer to the electronic file in the EDMS.
9.3. PROCEDURE MAIN STEPS
IMPORTANT NOTE
STEP DESCRIPTION1. Mooring of installation vessel away from platform2. Loading the riser from supply vessel to the installation vessel3. Installation vessel in position at platform4. Installation of all equipment on the platform
PREPARATORY WORK ON PLATFORM5. Preparation works on platform:
- Scaffolding erection- Winch transfer, positioning, welding on main deck and load testing- Cable overboarding system installation and routing of cable
6. Subsea survey7. Identification of subsea working area & cleaning of jacket area by diver
RISER INSTALLATION8. Hanger clamp installation9. Subsea clamp installation10. Clamp alignment checking11. Riser upending on deck12. Riser overboarding13. Winch connection14. Riser load transfer to winch15. Crane disconnection16. Positioning of riser into upper clamp17. Riser rotation into final orientation18. Riser lowering (hanger flange stopped by hanger clamp)19. Positioning of riser into lower clamp
Diver to monitor20. Riser tie-in21. Diver Survey
PRE-COMMISSIONNING ACTIVITY22. Pigging & Hydrotest test (once subsea spool installed, before or after the riser guard
installation)
Whichever installation vessel is chosen to carry out the work, the step by stepwritten in section 10 as well as the installation drawings in Appendix L shall befollowed.In the few instances where the use of the DSV texas requires more details (i.e.vessel positioning, cranage verification, diver umbilical checks…) refer to
Addendum.
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USARI IDOHO PIPELINES REPLACEMENT PROJECT 26/06/12
RISER INSTALLATION PROCEDURE at FA REVISION : REV 1
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RESTRICTED INFORMATION: May not be copied or distributed without SPECIFIC AUTHORIZATION.Warning: This document as printed may not be the latest version. Please refer to the electronic file in the EDMS.
STEP DESCRIPTION
RISER GUARD INSTALLATION23. Ensure subsea cleaning of jacket area by diver24. Subsea stabbing guide installation25. Riser guard installation26. Riser guard bracing adjustment and welding27. Diver Survey
TOPSIDE SPOOL REMOVAL & INSTALLATION28. Existing topside spool removal29. Metrology (by laser survey)30. Finalization of topside spool fabrication31. Installation and connection of topside spool and its support32.
PRE-COMMISSIONNING ACTIVITY33. Leak test
CLEAN-UP34. Platform Clean-up
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USARI IDOHO PIPELINES REPLACEMENT PROJECT 26/06/12
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10. INSTALLATION PROCEDUREThe flowchart presented in this section indicates the planned sequence of operations. Theimplemented offshore sequence of operations may have to be revised to accommodateunforeseen site or weather conditions, in order to avoid unnecessary vessel stand-by or siteaccess conflict.
Since the task plans are principally live working documents, the task plans may be revised offshoreat the time of the installation, following discussions between Offshore Manager, Field / ProjectEngineer and Client representative onboard. Any procedural changes will only take placeaccording to SAIPEM Management of Change Procedure.
10.1. Task plans
Task plan n°1:Preparation activitiesonboard vessel
Task plan n°5:Riser installation
Task plan n°4:Riser upending,overboarding andflooding
Task plan n°6:Riser guard installation
Task plan n°2:Preparation activitieson USARI FA platform
Task plan n°3:Hanger clamp &Subsea Clampinstallation
Task plan n°7:Existing topside spoolremoval &Topside spoolinstallation
Task plan n°8:Platform clean-up
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USARI IDOHO PIPELINES REPLACEMENT PROJECT 26/06/12
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10.2. Task plan n°1: Preparation Act ivi ties onboard S355
PREPARATION ACTIVITIES ONBOARD S355Step
n°Sequence Responsible Drawings
1. INST. VESSEL Permit To Work inplace.
MasterHSE rep /
2.
INST. VESSEL is positioned bow atNorth-East of USARI FA platform andparallel to the swell. INST. VESSELis far away from platform.
Master 0062671-03
3. All personnel involved in theoperations are informed about the jobto be performed.
ALL /
4. Preparation of rigging for risertransfer to INST. VESSEL. Deck foreman 0062671-11
5. All rigging certified. Deck foreman /
6.Preparation of INST. VESSEL decklayout for riser transfer (woodsupports).
Deck foreman 0062671-01
7. Supply vessel berthing. MasterDeck foreman /
8.USARI FA riser is horizontally liftedand transferred from supply vesseldeck to INST. VESSEL deck.
Tug MasterMastercrane operatorDeck foreman
0062671-02
9. Disconnection of lifting rigging usedfor transfer
Deck ForemanCrane Operator /
10. Connection of up-ending rigging.Installation of tag lines.
Deck ForemanCrane Operator 0062671-11
11. All rigging certified. Deck foreman /12. Riser secured on deck. Deck foreman /
13. Supply vessel moves away fromINST. VESSEL.
Tug MasterMaster /
14.
Marking of riser flange and hangerclamp in order to monitor visually therotation of the riser duringinstallation.
Deck foreman /
15. Marking of flooding line on riser Deck foreman 0062671-06
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PREPARATION ACTIVITIES ONBOARD S355
Stepn° Sequence Responsible Drawings
16.
Installation of blind flange at bottomwith flooding valve and protection ifrequired.Only 4 bolts will be pre-installed onthe flangeDiver superintendent or his team towitnessThe riser upper flange can be:
- the pre-commissioning flangeequipped with an open valve toexhaust the air pressure during
the flooding- a wood flange
Deck foremanDiver superintendent /
17.
Check position ofvalve on bottom flange
Valve shall be on the upper part ofthe flange (when the riser is up)
Valve shall be open
Deck foreman /
18.
Installation of the 2 transponders,one close to the flange and thesecond one at the exit of the bottombend, to get data for riser orientationconfirmation
Deck foremanSurvey /
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10.3. Task plan n°2: Preparation Activ iti es on USARI FA Platform
PREPARATION ACTIVITIESStep
n°Sequence Responsible Drawings
1.
Permit To Work from USARI FA inplace.Dive permit in place.Inform platform HSE responsible.
Barge Master /
2.
Move all temporary equipment andpersonnel from INST. VESSEL toUSARI FA Platform main deck:
rigging, cutting, grinding, weldingequipment, air hoses, electric hoses,scaffolding, and lighting…etc.
Riggers
Deck Foreman/
3.
A topside survey shall determine if awinch frame shall be fabricated andinstalled to rest on deck frame orspread the load.
Superintendent1rst Assistant
Inst. Eng.0062671-04
4.
Erection of scaffolding on:- jacket level- at future hanger clamp location- at existing/new topside spool
bottom and upper flange andsupport
- at riser guard location (leg)
Scaffolders /
5. Transfer the winch on platform. RiggersDeck Foreman 0062671-04
6.Installation of winch at main deck.Secure it by welding to the main deck Riggers
1rst Assistant 0062671-04
7.
Load Test of the winch to beperformed at 12.5t on the padeye tobe used for the topside spoolremoval/installation.
Deck Foreman,QA/QC
Client Rep/
SCAFFOLDING AREA
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PREPARATION ACTIVITIES
Stepn° Sequence Responsible Drawings
8.
Remove main deck net.Weld horizontal pipe for cableoverboarding and vertical pipe forcable guiding
Deck Foreman 0062671-04
9.Remove any obstructing item thatprevent the riser installation ifnecessary
Deck ForemanWelder Foreman /
10.
If required, install diver installationaids (come alongs, chain hoist…etc)on the platform and prepare electriccables for power supply coming fromINST. VESSEL.
Diving Supervisor /
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10.4. Task plan n°3: Riser Clamps Installation on USARI FA PlatformClamps will be installed by different teams, platform team or divers, according to the tasks to beperformed and the water depth where to operate.
Level(approx) Clamp type Weight
(kg)Installation Activities
+4.3 m Hanger clamp 400 kg Platformrigger
-10.9m Subsea RiserClamp 1.0t Air diving
Check that lifting padeyes are welded on the subsea clampIf not, a round sling will be installed on the clamp.
Note: No diving to be performed while hanger clamp is being installed
RISER CLAMP INSTALLATION
Stepn°
Sequence Responsible Drawings
RISER HANGER CLAMP INSTALLATION
1.Platform team to mark position ofdoubler plates and hanger clampusing metrology.
Platform rigger 00626450062648
2. Welding of the 2 doubler plates Welding Foreman 0062648
3.Deck team to prepare clamp inconfiguration for lifting in closeposition.
RiggersDeck Foreman /
4.Lifting rigging connection to clamp.Deck lifting trial for riggingadjustment.
RiggersDeck Foreman /
5. Clamp overboarding. Crane operatorDeck Foreman /
6.
Load transfer of clamp to winch.
Disconnection of crane rigging.Clamp lowering.
Riggers
Deck ForemanCrane operator /
7. Platform team to position the hangerclamp in final position and secure it.
RiggersDeck Foreman /
8. Platform team to weld the clamp tothe bracing. Welder Foreman /
9. Platform team to perform NDT. Welder Foreman /10. Paint touch up at welding location Painters /
11. Platform team to open clamp andsecure it in open position with ropes.
RiggersDeck Foreman /
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RISER CLAMP INSTALLATION
RISER SUBSEA CLAMP INSTALLATION
1.
Ensure that the subsea bracings are
checked by divers to avoid loosepoles on upper braces.
If necessary, install a downline frominstallation vessel to platform.
Diver SupervisorSuperintendent /
2.
Diver to perform metrology/taut wire tolocalize subsea clamp areas.
Area of cleaning can be delimited byrope.
DiverDiving Supervisor
NG00-SA-NDZZZ-0062647
0062671-05
3. Diver to clean area using HPWJaccording to drawing. Diver 0062671-05
4. Diver to mark position of clamp usingtaut wire. Diver 0062671-05
5. Superintendent and Dive supervisorto confirm clamp location
Diver SupervisorSuperintendent 0062671-05
Safety note:Ensure that before anydiving, the scaffoldingwork will stop. Scaffolding to be greentagged upon completioninsuring competentconstruction, insurethere are no objectsfrom the scaffolding thatcan fall into the divearea and there is nowork progressed duringdive operations.Prework survey by diverto determine the workarea and the area abovethe divers work area isclear from all potentiallyhazardous items.
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RISER CLAMP INSTALLATION
6.
Deck team to prepare clamp inconfiguration for lifting.Deck lifting trial for riggingadjustment.Diving superintendent or his team toview and accept prior to leaving thedeck.The riser clamp will be installed closeat riser side while the clamp will beinstalled open at bracing side. Riggers
Deck Foreman 0062671-10
7. Clamp overboarding. Crane operatorDeck Foreman 0062671-10
8. Lowering clamp into waterLoad transfer of clamp to winch withclamp into water.
Crane operatorDeck Foreman 0062671-14
9.
Diver to position clamp in finalposition.
Note: Pay attention to below anodeon jacket horizontal bracing whileinstalling
Diver 0062671-14
10.Clamp to be bolted up but finaltightening to be carried out laterDiver to check batter angle.
Diver 0062671-14
11. Diver to open the clamp (riser side)with tirfor and to secure it by rope Diver 0062671-14
12. Diver to perform visual inspection. Diver 0062671-14
Safety note:No diver into water
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METROLOGY
1.
Diver to perform measurement/tautwire and to confirm accuracy ofclamp positioning and alignment withhanger clamp.Record measurement on datasheet
Diver Appendix F
2. If not accurate, redo clamppositioning
Diving Supervisor/ Superintendent
/
3. Clamp bolts final tightening usingspanner or impact
Diving Supervisor/ Superintendent
Appendix F
4.Secure subsea clamp to bracing toavoid any motion during riserinstallation
DiverPlatform riggers 0062671-14
5. Recovering of clamp rigging. DiverPlatform riggers 0062671-14
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10.5. Task plan n°4: Lift ing, Up-Ending and Transfer of the Riser on USARIFA Platform
To summarize the operations, we can consider 3 phases:► UPENDING ► OVERBOARDING/FLOODING ► TRANSFER TO WINCH ► INSTALLATION
Status on USARI FA Platform:o All equipment and rigging necessary for the riser transfer are on the platform, ready to use.o All riser clamps, hanger and subsea clamps are installed and in open position.o All the platform personnel have been transferred onto USARI FA.o Winch tested and ready to use.o Riser prepared on INST. VESSEL deck.
RISER UPENDING, OVERBOARDING, UP-ENDING AND TRANSFER
Stepn°
Sequence Responsible Drawings
PREPARATION AND UPENDING
1.
All persons involved must be familiarwith this procedure.Ensure that INST. VESSEL Permit ToWork and USARI FA platform PermitTo Work, Dive Permit, JSA and ToolBox Talk briefings have beencompleted and correct PPE isutilized.
MasterDiving Supervisor /
2.Weather forecast and weatherwindow are favorable for the wholeriser updending and transfer.
Superintendent /
3. ALL /
The dive team is to bedebriefed by the divesupervisor on the scope ofwork.
All equipment ready asper subcontractorprocedure documents.JSA/Tool Box Talkcompleted (DWP andTask plan included).
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RISER UPENDING, OVERBOARDING, UP-ENDING AND TRANSFER
Stepn°
Sequence Responsible Drawings
4. Diving supervisor /
5.
During the operations, weatherforecasts will be thoroughly reviewedto establish if the weather and seaconditions are likely to deteriorateduring the operation or not. Aweather watch is to be posted to givewarning of approaching squalls orstorms. During all tasks, divingsupervisor, divers and surfacetenders are to maintain watch onweather and sea conditions.Deteriorating conditions are to bereported and diving operationssuspended when conditions areunsafe.Weather window time frame to beagreed by all partied prior to riser lift.
ALL /
6.Pre dive checks to be carried out.Checklists completed, signed andkept in dive control.
Diving Supervisor /
7.
Dive Supervisor to keep a detailedlog of all directives, communications,actions and results in the divelogbook.
Diving Supervisor /
8.
Deploy diver to make an inspection ofthe pre-installed riser clamp, ensuringthat the riser clamp is tied back in theopen position and free fromobstruction.
Diving Supervisor /
Safety Note:Diving Supervisorshould consider allpossible safetyhazards andprecautionsincluding thoseidentified in theHIRA and Risk
Assessments
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RISER UPENDING, OVERBOARDING, UP-ENDING AND TRANSFER
Stepn°
Sequence Responsible Drawings
9. ALL /
10. INST. VESSEL in position at USARIFA platform. Superintendent 0062671-03
11.
Ensure lifting rigging for transfer ischecked.
Connection of riser rigging to crane.Connect crane tugger line to riserbottom for riser orientation.
RiggersDeck Foreman /
12.
Perfect communications will have tobe established. Perform a full radiocommunication, check with all partiesinvolved with the operation. VHFhand held radios to be used withdedicated operating channelallocated.
ALL /
13.
Final communication test is donebetween crane operator, the platformteam, the responsible of the liftingoperations, Bridge and Masters.
Master /
14. OPEN the valve on the bottom andon t he upper flange.
Ensure that pre-commissioning liquidis inserted into the riser as requestedin the pre-commissioning procedure.
SuperintendentDeck foreman 0062671-06
15. Riser up-ending by craneSuperintendentCrane operatorDeck foreman
0062671-14
OVERBOARDING & FLOODING
16.Riser is overboarded and loweredinto water.Pay out tugger line to follow riser.
SuperintendentCrane operatorDeck foreman
0062671-14
17. Lower the riser into water untilflooding marking is at water level. Crane operator 0062671-14
Ensure that line forlevel of free-floodingis marked on riser
Deck crew, and allpersonnel involved inthe operations areinformed about the jobto perform. JSA will be
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10.6. Task plan n°5: Riser Installation on USARI FA Platfo rm
Status:o INST. VESSEL close to platformo Riser hanged on winch installed on platformo Riser clamps on the platform in open positiono Riser rigging disconnected from craneo INST. VESSEL crane released
RISER INSTALLATION
Stepn°
Sequence Responsible Drawings
1.
Slowly position the riser into hangerclamp. The hanger flange shouldremain about 1m over the top ofclamp.
Platform riggers 0062671-14
2. Riggers to close hanger clamp andkeep the clamp loose tighten. Platform riggers 0062671-14
3. Rigger to install flat slings around topof riser for rotation
Platform riggers 0062671-14
4.
Start rotation of riser.Continue rotation until the marking ofthe riser is aligned with the marking ofthe clamp.
Stop rotation.
Platform riggers 0062671-14
5.
Once rotation is completed, lowerriser with winch until the hangerflange sits on permanent support ofhanger clamp.
Platform riggers 0062671-14
6. Diver to report measurement of riserflange location and elevation.
DiverDiving Supervisor 0062671-14
7. Confirmation of the orientation bytransponder data Survey 0062671-14
8. Approval of riser configuration(position, elevation and orientation). Superintendent 0062671-14
9.
Platform rigger to tighten the bolts ofthe hanger clamp using torque orimpact.Platform rigger to respect tightentorque indicated in Appendix B.
Platform riggers 0062671-14
10.The diver will use Tirfor (suitable size)as well as ‘come alongs’ (suitablesize) to pull the riser into the clamp.
Diving Supervisor 0062671-14
11.
Diver to close the subsea clamparound.If required adjust position of subseaclamp on bracing.
Diver 0062671-14
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RISER INSTALLATION
Stepn°
Sequence Responsible Drawings
12.
Diver to tighten the bolts of thesubsea clamp using torque or impact.Diver to respect tighten torqueindicated in Appendix B.
Diver 0062671-14
13. Diver to perform visual inspection. Diver 0062671-14
14.Release tension from winch.Diver to disconnect slings from riserand recover rigging.
Platform riggersDiver 0062671-14
15.Ensure accessibility of on riser topflange (by scaffolding if necessary)
for pre-commissioning
Platform riggers 0062671-14
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10.7. Task plan n°6: Riser Guard Installation on USARI FA Platfo rm
NOTE: Riser guard installation is eased when low tide as crane operator has both stabbing guides
in sight.
RISER GUARD INSTALLATIONStep
n° Sequence Responsible Drawings
PREPARATION ACTIVITIES
1.
INST. VESSEL permit to work in place in
accordance with the USARI FA platformPTW system.
Superintendent
Safety officerClient /
2. ALL /
3. All Rigging used is certified and checked.Welding spread checked (to weld theriser guard to the jacket)
Deck Foreman0062671-12
Welding procedure
4.
Transfer of personnel and material onthe platform including cutting / grinding /welding equipment / rigging for securingthe riser guard in final position (chainblocks 3T, tirfors…) to the platform.
Deck Foreman /
5.On USARI FA platform, prepare thescaffolding on both location for upperbracing installation and welding
Scaffolder Assistant /
6. Welding of doubler plates for both upperbracing
Deck ForemanEngineers /
7.On USARI FA platform, verify the riserguard location, remove any obstructionthat can prevent the installation.
Deck ForemanEngineers /
8.On the USARI FA platform, confirm thatthe pre-installed winch is fullyoperational.
Deck FormanEngineers /
Deck crew, and all personnelinvolved in the operations areinformed about the job toperform including divingsubcontractor. TBT and jobsafety analysis is performedprior the operation start.
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RISER GUARD INSTALLATIONStep
n° Sequence Responsible Drawings
SUBSEA CLAMPS INSTALLATION
1. Diver SupervisorSuperintendent /
2. Diver to perform visual inspection tolocalize subsea clamp areas.
DiverDiving supervisor 0062671-05
3. Superintendent and Diver supervisor toconfirm the location
Diving supervisorSuperintendent /
4.
Diver to mark position of clamps bymeasurement.
Area of cleaning can be delimited byrope.
Diver /
5. Diver to clean area according to drawing. Diver 0062671-05
6. Once cleaning operation is completed,redo marking of clamp location. Diver /
7. Diver to perform visual inspection. Diver /
8.
Deck team to prepare clamp inconfiguration for lifting.The clamps will be tied open.
Install the lifting rigging and tag linesaccording to drawing.Deck lifting trial for rigging adjustment.
Adjust by means of chain hoist.Diving superintendent or his team to viewand accept prior to leaving the deck.
RiggersDeck Foreman
Diver superintendentDiver
0062671-12
Safety note:Ensure that before anydiving activities, thescaffolding work willstop. The existingscaffolding will bechecked to ensure it is
secured.
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RISER GUARD INSTALLATION
Stepn° Sequence Responsible Drawings
9.
Confirm that the air diving team is readyto assist the riser guard installationespecially to guide the riser guard duringfinal setting on pre-installed guideclamps.
Diving Team /
10. Clamp overboarding. Crane operatorDeck Foreman 0062671-15
11.
Lowering clamp into waterLoad transfer of clamp to winch withclamp into water. Crane operator
Deck ForemanPlatform riggers 0062671-15
12. Diver to position clamp on the bracing infinal position and secured it Diver 0062671-15
13. Diver to cut rope to close the clamps. Diver 0062671-15
14. Diver to check batter angle of stabbingguides Diver /
15.
Clamps to be tighten using torque orimpact.Diver to respect tighten torque indicatedin Appendix B
Diver Appendix B
16. Recovering of clamp rigging.Diver to disconnect rigging from clamp
DiverPlatform riggers /
17.Diver to perform visual inspection andmetrologyDatasheet to fill
Diver Appendix F
RISER GUARD INSTALLATION
1.
All persons involved must be familiar withthe present procedure. Ensure that INST.VESSEL permit to work, USARI FAplatform permit to work , dive permit andJSA have been completed and correctPPE is utilized.
SuperintendentSafety Officer
Diving Supervisor/
2. ALL /
Deck crew, and all personnelinvolved in the operations areinformed about the job toperform including divingsubcontractor. TBT and jobsafety analysis is performedprior the operation start.
Safety note:No diver into water
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RISER GUARD INSTALLATION
Stepn° Sequence Responsible Drawings
3. Personnel are transferred on USARI FAplatform.
Deck ForemanMaster /
4.
Perform a full radio communicationscheck with all parties involved with theoperation. bridge, platform team withwinch operator, dive control ormobile/portable surface supplied system,crane operator. VHF hand held radios tobe used with dedicated operatingchannel allocated.
ALL /
5.
On the USARI FA platform, the winchcable is routed through the snatch blocksaccording to the layout and preparationworks.
Deck ForemanRiggers team 0062671-04
6.
INST. VESSEL main crane is connectedon the riser guard rigging, and the riserguard is over boarded and positionedclose (+/- 3m) to the platform for thetransfer to the winch by zodiac. Deck Foreman
Crane Operator 0062671-15
7.Winch end to be lower at sea levelRiser guard rigging connection to winchend
RiggersZodiac
Crane op0062671-15
8.
Riser guard is lifted up out of waterLoad transfer to winch
RiggersWinch op 0062671-15
9.
Riser guard to be lowered into waterDisconnection of crane grommet by
zodiacRecover the Crane
RiggersWinch op
Zodiac0062671-15
10.
Riser guard is lowered about 1m aboveguide
RiggersWinch op
ALL
0062671-15
NOTE: Pay attention tosubsea guide out of waterduring load transfer
Safety note:No diver into water
Ensure goodcommunication isrequired betweenwinch operator andriggers foreman,divers, INST. VESSELmanagement team
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RISER GUARD INSTALLATION
Stepn° Sequence Responsible Drawings
23. Disconnection of hold back/winch rigging Rigger 0062671-14
24. Paint touch up at welding location Painting /
25. Remove installation aids from platform Riggers 0062671-14
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10.8. Task plan n°7: Topside Spool Removal & Installation on USARI FAplatform
Status:o Gauging and hydrotest from top of riser to top of riser performed and accepted by
COMPANY for topside spool installation.
Prior to the existing topside spool removal, existing 24” USARI FA-FR line shall
be deoiled and depressurized. Certificates shall be issued to SAIPEM.
For topside spool installation and removal, Asabo – Usari 20in Topside spool
shall not be installed.
TOPSIDE SPOOL REMOVAL & INSTALLATION
Step n° Sequence Responsi ble Drawings
TOPSIDE SPOOL REMOVAL
1.
Erection of scaffolding at existingtopside spool area (flanges and topsidespool support)
NOTE: For scaffolding erection, pay
attention to topside spoolremoval/installation operation for anyclash
Platform rigger /
2. Rigger to connect hold back riggingand rigging on the topside spool
RiggersDeck foreman 0062671-14
3.Rigger to connect winch cable to therigging & to maintain in tension thewinch cable to secure the topside spool
RiggersDeck foreman
Winch Operator 0062671-14
4.
Riggers to cut the topside spoolbetween the 2 clamps, in the straightpart.
Deck Foreman 0062671-14Safety note:
Potential motion ofriser after cutting
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TOPSIDE SPOOL REMOVAL & INSTALLATION
Step n° Sequence Responsi ble Drawings
TOPSIDE SPOOL REMOVAL
5.
Riggers to remove bolts of the spoolfrom the flange valve using FloggingSpanner/nut Splitter/Impact
Deck Foreman /
6.
Slackening & release of the hold backrigging from spool until weight is totallysustained by winchRigger to guide the spool to avoid clashwith platform
RiggersDeck foreman /
7.
Lower the spool to the sea levelRiggers or zodiac to connect cranewhip hook to the dedicated grommet ofthe spool rigging
Winch OperatorDeck Foreman /
8.Load transfer from winch to vesselcrane hook until weight is fullysustained by the vessel crane.
Crane operatorWinch operator /
9. Zodiac to disconnect winch cableCrane operatorWinch operator
Zodiac/
10. Recovery on deck Deck foremanCrane operator /
11. Temporary plug to install on top ofexisting riser at cut location
Deck foremanRiggers /
Safety note:Potential motion of riserafter disconnection
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TOPSIDE SPOOL INSTALLATION
1.Ensure erection of scaffolding at newtopside spool area (flanges and topsidespool support)
Platform rigger /
2. Laser metrology between valve flangeand top of riser. Platform rigger NG00-SA-NDZZZ-
0062646
3.Final spool construction according tometrology receivedPay attention to hole alignment
Welder foreman NG00-SA-NDZZZ-0062677
4. Ensure spool hydrotest performed asper pre-commissioning procedure.
Deck ForemanQAQC
Pre-commissioningprocedure
5.
Riggers to install hold back rigging
arrangement on platform (flat roundsling, tirfor or beam clamp if required). Platform rigger /
6. Riggers on deck to prepare rigging oftopside spool. Deck Foreman 0062671-13
7.Topside spool lifting by crane,overboarding, lowering into water andconnection to winch at sea level.
Deck ForemanCrane operator 0062671-16
8. Connection of hold back rigging Platform riggerZodiac 0062671-16
9. Load transfer to winch at requiredlocation and level to avoid any clash
Deck ForemanCrane operator 0062671-16
10.
Slowly transfer spool to riggingarrangement on platform.Keep winch connected and in tensionfor 1rst steps
Platform rigger 0062671-16
11. Rigger to position topside spool in finallocation by tirfors. Platform rigger 0062671-16
12.Torque/tightening of topside spoolPlatform rigger to respect tighten valueindicated in Appendix B.
Platform rigger Appendix B
NG00-SA-OPZZZ-0058520
13. Welding of topside spool support Welding Foreman
NG00-SA-NDZZZ-0062658
NG00-SA-KPWLD-0058621
14. Paint touch up at support location Painting /
15.Insulation test to be conductedaccording to supplier procedure
AssistantInstallation Eng. /
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10.9. Task plan n°8: Remaining Activ iti es on USARI FA Platform
REMAINING ACTIVITIIES ON USARI FA PLATFORMStep
n°Sequence Responsible Drawings
1.
Remove winch, horizontal pipe onhelideck, lifting arrangement, weldingand scaffolding equipment offplatformClean-up platform.
Platform riggerSuperintendent
/
2. Touch up at required location Painting /
3.
Redo grating, net and deck which
could have been removed forinstallation.
Platform riggerSuperintendent
/