Update ASME IX 2019
Scope of PQR
- Material: API 5L Gr. X52N PLS2 SMLS
- Pipe size: NPS 8” Sch 80 (12.7 mm)
- Joint design: Groove, included angle 60 deg.
- Welding process: weld metal deposit of GTAW (2.7 mm) and FCAW (10 mm).
Reference ASME II part A - base metals; part C - welding consumables, ASME B16.25 - end preparation.
Descriptions
Descriptions of WPS here.
QW-402 Joint details
Joint details of WPS shall be shown all variable in table QW-256 (for GTAW) and table QW-255 (for FCAW).
We should bring all variables in these tables and range of qualified application to new WPS.
- QW-402.1 Groove design: as detailed in the PQR, eg. included angle: 60 +/-10 deg., Root gap: 3.2mm, Root face: <1mm, see ASME B16.25 – groove bevel ends.
- QW-402.4 Backing: GTAW “N/A – not applicable”, FCAW “weld metal”.
- QW-402.5 Backing: GTAW “None”; FCAW “N/A”.
- QW-402.10 Root Spacing: 3.2mm
- QW-402.11 Retainers: GTAW “None”; FCAW “-“.
QW-403 Base metal
Base metal of the test coupon as mentioned in the PQR, base metal qualification of WPS follow an assigned material in table QW-422 including of P number, group number, thickness qualification.
- QW-403.5 Group no.: Gr-no. 1, see QW-422,
- QW-403.6 T limits: 12.7 to 25.4mm,
- QW-403.8 T Qualified: 5 to 25.4mm, see Table QW-451.1,
- QW-403.9 t pass > 13mm: “None“,
- QW-403.11 P Qualified: P-no. 1, see table QW-422,
Note: QW-402.5 and QW-402.6 shall apply when PQR required CVN test.
QW-404 Filler metal
- QW-404.3 Size: GTAW: “2.4 mm”, FCAW: “n/a”;
- QW-404.4 F Number: GTAW: “6”, FCAW: “6”; see table QW-432 and filler metal selection ASME II Part C SFA 5.18 Classification
Note: we should use an electrode classification of ER70S-6 , due to more projects restricts a classification “G” and supplementary PQR required CVN test. - QW-404.5 A Number: GTAW: “1”, FCAW: “1”; see table QW-442,
- QW-404.6 Diameter: GTAW: “n/a”; FCAW : “1.2mm”,
- QW-404.7 Diameter > 6mm: GTAW: “n/a”; FCAW: “-“,
- QW-404.12 Spec. or Class. A/SFA.: GTAW “A/SFA 5.18 ER70S-6”; FCAW “A/SFA 5.20 E70T-1C”,
- QW-404.14 Filler: GTAW: “Yes”; FCAW: “n/a”,
- QW-404.22 Consumable Insert : GTAW: “None”; FCAW : “n/a”,
- QW-404.23 Filler metal product form: GTAW: “Solid” ; FCAW: “Flux cored”,
- QW-404.24 Supplemental filler: GTAW: “n/a” ; FCAW: “None”,
- QW-404.24 Alloy elements: GTAW: “n/a” ; FCAW: “None”,
- QW-404.30 Max. Deposit thickness (t): GTAW: “6mm” ; FCAW : “19mm”, refer to table QW-451.1,
- QW-404.32 t limits: GTAW: “n/a” ; FCAW : “None”,
- QW-404.33 Classification: GTAW: “-“ ; FCAW : “-“, if not mentioned in the project specifications, please inorge this non-esstional variable,
- QW-404.50 Flux : GTAW: “None” ; FCAW : “n/a”.
QW-405 Positions
ASME IX allows qualification either plate or pipe test coupon, and not restrict the position like AWS D1.1 except supplementary essential variables. These supplementary essential variables shall become an essential variable when addition of CVN test. If the PQR are not required the CVN test, the test coupon on plates also qualify for pipe and vice versa.
- QW-405.1 + Position: “All”,
- QW-405.3 change vertical welding: “-“,
Note :
The welder or welding operator who prepares the WPS qualification test coupons meeting the requirements of QW-200 is also qualified within the limits of the performance qualifications, listed in QW-304 for welders and in QW-305 for welding operators. He is qualified only within the limits for positions specified in QW-303.
QW-406 Preheat
Preheat temperature will effect to a quality of weldment such as high hardness value, impact test value at heat affected zone, etc.
- QW-406.1 Decrease > 55 deg. C: “10 deg.C”,
An atual preheat temperature recorded and then minus of 55 deg.C, refer to ASME B31.3 table 330.1.1 – preheat temperatures if the WPS application to ASME B31.3. - QW-406.2 Preheat maintenance: “-“,
- QW-406.3 Increase > 55 deg. C: “250 deg. C”,
Almost project specifications are allowed of interpass temperature max. 250 deg C.
QW-407 PWHT
- QW-407.1 change PWHT: “None”
- QW-407.2 change PWHT (T & T range): “-“
- QW-407.4 T limits: “-“
QW-408 Gas
- QW-408.1 Trailing or composition: GTAW: “SG-A”, FCAW: “SG-C”, see AWS A5.32,
- QW-408.2 Single, mixture %: GTAW: “99.997%”, FCAW: “100%”, refer to AWS A5.32,
- QW-408.3 Flow rate: GTAW: “10-15 lpm”, FCAW: “10-17 lpm”,
- QW-408.5 Backing flow: GTAW: “None”, FCAW: “-”,
- QW-408.9 Backing or composition: GTAW: “None”, FCAW: “-”,
- QW-408.10 Shielding or trailing: GTAW: “-”, FCAW: “-”,
QW-409 Electrical characteristics
- QW-409.1 Heat input: calculation HI = (V x A x 60)/ TS (travel speel – mm/minute). Running PQR should control HI value between 1.0 to 3.5 kJ,
- QW-409.2 Transfer Mode: GTAW: “n/a”, FCAW: “None”,
- QW-409.3 Pulsing current: GTAW: “None”, FCAW: “n/a”,
- QW-409.4 Current and Polarity: GTAW: “DC EN”; FCAW: “DC EP”
- QW-409.8 I & E range: GTAW “A: 80 – 150”, “V: 10-14”; FCAW “A: 100-200, V:20-30”.
- QW-409.12: Tungsten electrode: GTAW: “2.4mm, 2%thoriated”, FCAW “n/a”,
QW-410 Technique
- QW-410.1 String/weave: GTAW: “string/weave”, FCAW: “string/weave”,
- QW-410.3 Orifice, nozzle or gas cup size: size no.: GTAW: “4 – 7”, FCAW: “3/4”,
- QW-410.5 Method cleaning: “grinding, wire brushing”,
- QW-410.6 Method back gouge: “None”,
- QW-410.7 Oscillation: “None”, due to manual/ semiauto process,
- QW-410.9 Multi to single pass/ side: “Multi”,
- QW-410.10 Single to multi electrodes: “Single”,
- QW-410.11 Closed to out chamber: “None”,
- QW-410.15 Electrode spacing: “None”,
- QW-410.25 Manual or automatic: Manual “GTAW” & Semiauto “FCAW”,
- QW-410.26 Peening : “None”,
- QW-410.64 Use of thermal processes: “None”,
Download WPS / PQR format.
