offshore pipeline construction phase

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