NATIONAL CERTIFIED PIPE WELDING BUREAU
WELDING PROCEDURE SPECIFICATION
NO. 8:1-3-1
FOR
GAS TUNGSTEN ARC WELDING (GTAW)
OF
AUSTENITIC STAINLESS STEEL PIPE, VALVES, FITTINGS AND FLANGES
TO
CARBON STEEL PIPE, VALVES, FITTINGS AND FLANGES
USING ER309 FILLER METAL
© NCPWB
This document is the property of
(NCPWB Member Company Name)
This Welding Procedure Specification (WPS) and Procedure Qualification Record(s) (PQR)
are issued by the NCPWB for adoption by its members. Reproduction or
use of this WPS and PQR(s) by anyone other than members of the NCPWB is
prohibited
WELDING PROCEDURE SPECIFICATION (WPS)
Company Name:
WPS Number: 8: 1-3-1 Original WPS Date: 5-5-87 Supporting PQRs: 87805, 87806
Revision Number: 2 Revision Date: 10/1/13
Welding Process: Gas Tungsten Arc (GTAW) Type: Manual
Joints (QW-402)
Joint Design: Single-V or U, Double-V or U, Fillets, Repairs, Build-up Details: See Typical Joint Designs
Backing: Optional Backing Material Type: Carbon Steel, when used
Base Metals (QW-403) Filler Metals (QW-404) Root Balance
P-Number: 8 Group Number: 1, 2 Specification Number (SFA): 5.9 5.9
to P-Number: 1 Group Number: 1, 2 Classification: ER309 ER309
Thickness Range F-number: 6 6
Groove Welds: 1/16” to 2.25” A-Number: 8 8
Fillet Welds: All Maximum Deposited Weld
Pipe Diameter Range Metal Thickness - Groove: 0.652” (including root)
Groove Welds: Over 1” O.D. - Fillet: All All
Fillet Welds: All Maximum Bead Thickness: 1/8” 1/8”
Flux Trade Name: N/A N/A
Consumable Insert: None None
Positions (QW-405) Postweld Heat Treatment Technique (QW-410)
(QW-407)
Welding Positions: All Temp. Range: None String or Weave Bead: Either
Welding Progression: Uphill Time Range: N/A Method of Backgouging: None
Preheat and Interpass Electrical Initial and Interpass Cleaning: Grind to re-
Temperature (QW-406) Characteristics move cutting oxide, solvent clean to remove
(QW-409) cutting oil. Grind and wire brush to remove
Minimum Preheat: 50˚F Current Type: DC slag deposits.
Maximum Interpass: 350˚F* Polarity: Straight Orifice or Gas Cup Size: #4 to #12
Preheat Maintenance: Not Required Amperage: See Table Oscillation: N/A
Gas (QW-408) Electrode Feed Speed: N/A Contact Tube to Work Distance: N/A
Shielding Gas: 100% Argon Voltage: N/A Multiple or Single Pass: Either
Composition: Welding Gr. Travel Speed: See Table Multiple or Single Electrode: N/A
Flow Rate: 8-20 CFH Tungsten Type: 2% Thoria Peening: Not Permitted
Gas Backing: Ar, 5-15 CFH Tungsten Size: 3/32,1/8” Other:
Tracking Shield: None Pulsed Current: None
Weld
Layer
Welding
Process
Filler Metal Current
Volts
Travel
Speed *
(ipm)
Other
Class Dia. (in) Type/
Polarity Amps
*These values are recommended
only, not mandatory
1(S5, 10) GTAW(3/32) As Above 3/32 or 1/8 DCSP 40-60 2-4
1(S40+) GTAW As Above 3/32 or 1/8 DCSP 70-100 2-5
Fill and GTAW As Above 3/32 DCSP 70-170 2-6
Fillets GTAW As Above 1/8 DCSP 70-200 2-8
The undersigned contractor, a member of the National Certified Pipe Welding Bureau, hereby adopts this
jointly developed procedure as its company Welding Procedure Specification and certifies that this
procedure has been qualified as shown on the attached Procedure Qualification Record.
Contractor:
By: Date:
Title:
WPS 8:1-3-1 NCPWB Form QW-482 4/87
Use 3/32” tungsten on Schedule 5 to 10 pipe
For use by NCPWB members only (©NCPWB)
September 20, 2012
Z
Typical Joint Designs Other joint designs shown on Engineering drawings supersede these joint details
Butt welds
Note 1: 1/8 inch maximum except for B31.1 and B31.5 work, 1/16 inch maximum
Fillet, Nozzle and Branch Connection Welds
Socket and Slip-on Flange Welds
T = The nominal thickness of the pipe
X = the lesser of 1.4T or the hub thickness unless another size is shown on the engineering drawings
Y = the lesser of 1.1T or the fitting thickness unless another size is shown on the engineering drawings
Z = for B31.9 work, minimum of the greater of the pipe nominal wall thickness or 1⁄4 in. (6 mm) and face
fillet is not required unless specified by the design.
3/32 to 1/8”
See note 1
30 to 45
3/32 to 1/8”
3/16 Nom. See Note 1
30 to 45
3/32 to 1/8”
1/8” min 45 min
Smaller of T or 1/4”
X
X
1/16” min
1/16” min
Y Y
Approximately
1/16” before
welding
Size (leg)
Dimension
Throat
dimension
1/16” max
For use by NCPWB Members Only (© NCPWB)
PROCEDURE QUALIFICATION RECORD (PQR)
WPS followed during welding of test coupon: 108B021-2.25(IT), Rev 0 Dated 10/6/81 Test Date: 11-24-81
Welding Process(s) used: Gas Tungsten Arc/Shielded Metal Arc Type: Manual
Base Metal Specification: SA-312, Type 316 to Base Metal Specification: SA-333 Grade 6
P-No: 8 Group No: 1 to P-No: 1 Group No: 1 Thickness: 1.125”
Plate: Diameter if pipe: 10” Sch 160 Joint Type: Single V-Groove without backing, 1/8 root opening
Filler Metal Specification: SFA 5.9/SFA 5.4 AWS Classification: ER309/E309-16 F-No.: 6/5
A-No.: 8 Filler Metal Size: 1/8,3/32,1/8,5/32 Supplementary Filler Metal: NA
Weld Metal Deposit Thickness : 0.125/1.0 Maximum Pass Thickness : <1/4”
Preheat Temp (◦F): 70 Interpass Temp (◦F): 350 Welding Position/Progression: 5G Uphill
Tungsten Type/Size: 2% Thoria, 1/8” Current: DC Polarity: SP/RP Travel Speed: NA ipm
Postweld Heat Treatment (◦F): None Heat Treatment Time (Hrs): NA
Shielding Gas Composition : Welding Grade Argon, 20 CFH Backing Gas: Argon, 10-30 CFH
Stringer/Weave Bead: Stringer and Weave Transfer Mode: NA
Oscillation: NA Single/Multi-Pass: Multi Single/Multi-Arc: Single
Layer Process Filler Class Diameter Amperage Travel Speed(ipm) Other
1,2
3,4
5,6
7,8
9,13
GTAW
SMAW
SMAW
SMAW
SMAW
ER309
E309-16
E309-16
E309-16
E309-16
1/8
3/32
1/8
5/32
1/8
80-120
60-110
80-105
130-150
80-130
3-5
1.5-3
1.5-2.5
1.75-3
1.5-3
Reduced Section Tensile Tests
Specimen No. Width/Dia. Thickness Area Ult. Load (lbs) Ult. Stress (psi) Failure Location
5G-1 0.748 1.017 0.761 55,500 72,900 Base Metal
5G-2 0.757 1.007 0.762 56,000 73,500 Base Metal
Guided Bend Tests [ X ] QW-452.2 (Side) [ ] QW-462.3(a) (Trans R&F) [ ]QW-462.3(b)(Long R&F)
Side Acceptable Side Acceptable
Side Acceptable Side Acceptable
Welder’s Name: David Touhey Stamp No. 1B Test Number: 8-7075-D
Welding Witnessed by : Jagdish Gupta Specimens Evaluated by : Twin City Testing and Eng. Lab
We Certify that the statements in this record are correct, and that the test coupons were prepared, welded
and tested in accordance with the requirements of Section IX of the ASME Code.
NATIONAL CERTIFIED
PIPE WELDING BUREAU Contractor:
By: Date:
BY:
Chairman, Technical Committee NCPWB Form QW-483 4/87 PQR Number: 87805
For use by NCPWB members only (©NCPWB)
PROCEDURE QUALIFICATION RECORD (PQR)
WPS followed during welding of test coupon: P8-P1-ST(ap) Test Date: 1-10-83
Welding Process(s) used: Gas Tungsten Arc Type: Manual
Base Metal Specification: SA-312, Type 304 to Base Metal Specification: SA-333 Grade 6
P-No: 8 Group No: 1 to P-No: 1 Group No: 1 Thickness: 0.326”
Plate: Diameter if pipe: 8” Joint Type: Single V-Groove without backing, 1/8 root opening
Filler Metal Specification: SFA 5.9 AWS Classification: ER309 F-No.: 6
A-No.: 8 Filler Metal Size : 3/32,1/8 Supplementary Filler Metal: NA
Weld Metal Deposit Thickness : 0.326 Maximum Pass Thickness : <1/8”
Preheat Temp (◦F): 50 Interpass Temp (◦F): 350 Welding Position/Progression: 6G Uphill
Tungsten Type/Size: 2% Thoria, 1/8” Current: DC Polarity: SP Travel Speed: NA ipm
Postweld Heat Treatment (◦F): None Heat Treatment Time (Hrs): NA
Shielding Gas Composition : Welding Grade Argon, 10-20 CFH Backing Gas: Argon, 5-35 CFH
Stringer/Weave Bead: Stringer and Weave Transfer Mode: NA
Oscillation: NA Single/Multi-Pass: Multi Single/Multi-Arc: Single
Layer Process Filler Class Diameter Amperage Travel Speed(ipm) Other
1
2
3,4
Bal
GTAW
GTAW
GTAW
GTAW
ER309
ER309
ER309
ER309
3/32
3/32
1/8
1/8
40-65
40-65
50-75
65-85
2-4
1-4
1-4
1-4
Reduced Section Tensile Tests
Specimen No. Width/Dia. Thickness Area Ult. Load (lbs) Ult. Stress (psi) Failure Location
T-1 0.741 0.195 0.144 11,500 79,860 Base Metal
T-2 0.740 0.250 0.185 15,200 82,160 Base Metal
Guided Bend Tests [ ] QW-452.2 (Side) [ X ] QW-462.3(a) (Trans R&F) [ ]QW-462.3(b)(Long R&F)
Root No Defects – Acceptable Face No Defects – Acceptable
Root No Defects – Acceptable Face No Defects – Acceptable
Welder’s Name: D. Hodgin Stamp No. 14 Test Number: X03153
Welding Witnessed by : N.W. Seld Specimens Evaluated by : D. Bogart, Valley M.F.I, Portland
We Certify that the statements in this record are correct, and that the test coupons were prepared, welded
and tested in accordance with the requirements of Section IX of the ASME Code.
NATIONAL CERTIFIED
PIPE WELDING BUREAU Contractor:
By: Date:
BY:
Chairman, Technical Committee NCPWB Form QW-483 4/87 PQR Number: 87806
For use by NCPWB members only (©NCPWB)