7/18/2019 Preliminary WPS for mechanized GMAW root to cap

http://slidepdf.com/reader/full/preliminary-wps-for-mechanized-gmaw-root-to-cap 1/2

Sheet 1/2

Rev. B

Equipment for welding

 API 5L - X 60

Pipe Dimensions:

COMPUTERIZED AUTOMATIC GMAW

PWT-CWS.02E

MAINLINE CARBON STEEL PIPE LINE WELDING

OUTSIDE DIAMETER 28 INCHES

Project: On-shore Export pipeline West Qurna Phase II-Iraq

W.T. 19.1 mm

JOINT DESIGN

Date : 04-11-2012

 Appl ication:

Base Material:

Welding Process:

WELDERS PROCEDURE SPECIFICATIONS

(WPS)-PRELIMINARY

FOR AUTOMATIC WELDING

EPC Contractor: TECHNO

ENGINEERING SERVICES(PVT) LTD

TORCH FEATURES & FILLER MATERIALS

Shielding gas typeFlow rate

[L/min.]

(±10%)

1.2 30

1.2 30

1.2 30

1.2 30

Minimum Welders Number for root pass:

Minimum Welders Number for joint:

HOT

ROOT

CO2 100%

CAP

ELGAMATIC 103

ELGAMATIC 103

CO2 100%

Diam.mm

Filler metal typePass N°

21 mm

 (±10%)

 A 5.18 - ER 70S - 6

 A 5.18 - ER 70S - 6

 A 5.18 - ER 70S - 6

TWO

CO2 60% / Arg 40%

Gas nozzle diameter:

Minimum Run Number: Eight

5G (HORIZONTAL AXIS) ALL PASSES DOWNHILLDirection of welding: Welding position

 AWS Classi fi cat ion

Batch. No. when available

FILL1-5 CO2 60% / Arg 40%  A 5.18 - ER 70S - 6ELGAMATIC 103

ELGAMATIC 103

ROOT

HOT

FILL1

FILL2

FILL3

FILL4

FILL5

7/18/2019 Preliminary WPS for mechanized GMAW root to cap

http://slidepdf.com/reader/full/preliminary-wps-for-mechanized-gmaw-root-to-cap 2/2

Width

mm.

no.

oscillation

/ min

ROOT DC + 20÷23 230÷300 0.4-0.5 60÷85 6.0÷8,0 10÷15 0÷1,0 200

Polarity Volts

Date : 04-11-2012

Type of Line-up clamp:

Removal of Line-up clamp:

Post Weld Heat Treatment:

Sheet 2/2

NOT NECESSARY

RING BURNER WITH PROPANE GAS OR INDUCTION HEATING SYSTEM

Preheating min temperature:

Type of heater to be used:

  80 °C max. temperature:   100 °C

WELDERS PROCEDURE SPECIFICATIONS

(WPS)-PRELIMINARY

FOR AUTOMATIC WELDING

Rev. B

STANDARD INTERNAL PNEUMATIC INCLUDING PWT-BACKING SYSTEM

 AFTER ROOT HAS BEEN 100% COMPLETED

Oscillation

WELDING PARAMETERS

Stick out

mm. Amp s

H.T.

kJ/mm

(±10%)

Travel

speed

cm/min.

Wire

speed

m/min.

Order and

Pass N°

Current

type

 AC-DC

HOT DC + 20÷23 230÷300 0.65-0.8 40÷55 6.0÷8,0 12÷15 2.5÷4 100÷200

FILL 1 DC + 19÷22 200÷280 0.65-0.75 35÷50 6.0÷7.5 12÷15 3.5÷5 100÷200

FILL 2 DC + 19÷22 200÷280 0.65-0.75 35÷50 6.0÷7.0 12÷15 4.5÷6 100÷200

FILL 3 DC + 19÷22 200÷280 0.65-0.75 35÷50 6.0÷7.0 12÷15 5.5÷7 100÷200

FILL 4 DC + 19÷22 200÷280 0.65-0.75 35÷50 6.0÷7.0 12÷15 6÷8 100÷200

FILL 5 DC + 18÷21 180÷250 0.6-0.7 30÷45 5.0÷6.0 12÷15 6.5÷8.5 100÷200

CAP DC + 17÷19 160÷210 0.8-1 15÷30 3,5÷5,0 10÷12 9÷11 80÷180

Time lapse between the end of root pass and start of hot pass : MAX. 1 hour 

Time lapse between the end of hot pass and start of subsequent pass : MAX. 1 hour 

Interpass temp.: Min. °C 70 max. °C 150

Minimum. Number of runs before joint allowed to cool:

Cleaning :   BRUSHING IF IT NECESSARY

Back gouging : N.A.

THREE or 50% of W.thk.