preliminary wps for mechanized gmaw root to cap
DESCRIPTION
using copper backingTRANSCRIPT
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7/18/2019 Preliminary WPS for mechanized GMAW root to cap
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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
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7/18/2019 Preliminary WPS for mechanized GMAW root to cap
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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.