OFFSHORE PIPELINE CONSTRUCTION PHASE
Pipe Laying : Normal S-Laying Method
OFFSHOREPIPE LAYING: Normal S-Laying Method
Step 1: PIPE BEVELING Lift the pipe out of the supply barge onto the incoming rack Pipe Tallying (pipe number, length, joint number) Making the J-Bevel on pipe ends for Auto welding
Step 2: Station 1 (Fit up, Root and Hot Pass) Preheat on pipe end prior to welding (based on approved WPS) Fitting pipe ends to be aligned by means of internal clamp Root weld followed by Hot pass
Step 3: Station 2,3,4&5 Filler passes on Station 2 and 3 Cap welding on Station 4 Visual Inspection on Station 5
Sta #2
Sta #3
Sta #4Sta #5
Step 4: Station 6 (X-Ray)
X-ray operators control the movement ofthe X-ray crawler inside the pipe
Wrapping the film around the intended joint
Radiographic intrepeters from HHI, Client andMigas are reviewing the X-ray result
Step 5: Station 7& 8 (Brush up and Cold Wrap)
Sta #8: Cold WrapSta #7: Brush up
Step 6: Station 9 (FIELD JOINT COATING) & PULLING Foam Coating performed by OJS (Offshore Joints
Service)
WELDING
X - Ray
Coating
Laying
HD 423
Laying
LINE PIPE ON SEA BED
P2
P1
S1
S2
P4
S4
P5
S5
How the Barge Moves
P2
P1
S1
S2
P4
S4
P5
S5
P2
P1
S1
S2
P5
S5
P4
S4
P5
S5
P2
P1
S1
S2
P4
S4
P4
S4
P5
S5
P1
S1
P2
S2
P4
S4
P2
S2
P5
S5
P2
S2
P4
S4
P1
S1
P5
S5