QW-255.1 Welding Variables Procedure Specifications (WPS) — Gas Metal‐Arc Welding (GMAW and FCAW)
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ASME BPVC.IX-2015
Table QW-256
Welding Variables Procedure Specifications (WPS) — Gas Tungsten-Arc Welding (GTAW)
Paragraph
QW-402
Joints
QW-403
Base Metals
QW-404
Filler Metals
QW-405
Positions
Brief of Variables
ϕ Groove design
X
.5
+
Backing
X
.10
ϕ Root spacing
X
.11
±
X
.5
ϕ Group Number
Retainers
X
.6
T Limits
.8
T Qualified
X
X
X
.11
ϕ P‐No. qualified
.3
ϕ Size
.4
ϕ F‐Number
X
.5
ϕ A‐Number
X
.12
ϕ Classification
.14
±
Filler
.22
±
Consum. insert
.23
ϕ Filler metal product form
X
.30
ϕ t
X
.33
ϕ Classification
X
.50
±
Flux
X
.1
+
Position
X
.2
ϕ Position
.3
ϕ ↑↓ Vertical welding
.1
QW-407
PWHT
.1
ϕ PWHT
.2
ϕ PWHT (T &T range)
X
X
X
X
X
X
Decrease > 100°F (55°C)
.3
X
Increase > 100°F (55°C) (IP)
.4
QW-409
Electrical
Characteristics
Supplementary
Essential
Nonessential
.1
QW-406
Preheat
QW-408
Gas
Essential
X
X
X
T Limits
X
Trail or ϕ comp.
.1
±
X
.2
ϕ Single, mixture, or %
.3
ϕ Flow rate
.5
±
.9
− Backing or ϕ comp.
X
X
X
X
or ϕ Backing flow
X
.10
ϕ Shielding or trailing
.1
> Heat input
.3
±
.4
ϕ Current or polarity
.8
ϕ I & E range
X
.12
ϕ Tungsten electrode
X
X
Pulsing I
X
X
44
X
ASME BPVC.IX-2015
Table QW-256
Welding Variables Procedure Specifications (WPS) — Gas Tungsten-Arc Welding (GTAW) (Cont'd)
Paragraph
QW-410
Technique
Brief of Variables
Essential
Supplementary
Essential
Nonessential
.1
ϕ String/weave
X
.3
ϕ Orifice, cup, or nozzle size
X
.5
ϕ Method cleaning
X
.6
ϕ Method back gouge
X
.7
ϕ Oscillation
.9
ϕ Multi to single pass/side
X
X
.10
ϕ Single to multi electrodes
X
X
.11
ϕ Closed to out chamber
.15
ϕ Electrode spacing
X
.25
ϕ Manual or automatic
X
.26
±
X
.64
X
X
Peening
Use of thermal processes
X
Legend:
+ Addition
− Deletion
↑ Uphill
↓ Downhill
> Increase/greater than
< Decrease/less than
45
← Forehand
→ Backhand
ϕ Change
ASME BPVC.IX-2015
Table QW-256.1
Welding Variables Procedure Specifications (WPS) — Gas Tungsten-Arc Welding (GTAW)
Special Process Variables
Essential Variables
Paragraph
QW-402
Joints
QW-403
Base Metals
Hard‐Facing Overlay (HFO) (QW-216)
Finished t
Corrosion‐Resistant Overlay (CRO) Nonessential Variables for HFO
(QW-214)
and CRO
.16
<
<
Finished t
.20
ϕ P‐Number
ϕ P‐Number
.23
ϕ T Qualified
ϕ T Qualified
ϕ Wire size
.3
.12
QW-404
Filler Metals
ϕ Classification
.14
±
.23
ϕ Filler metal product form
Filler metal
.4
QW-406
Preheat
.4
QW-407
PWHT
.6
QW-408
Gas
.2
QW-409
Electrical
Characteristics
.4
QW-410
Technique
Filler metal
ϕ A‐Number
.37
QW-405
Positions
±
ϕ Filler metal product form
+ Position
+ Position
Dec. > 100°F (55°C) preheat
> Interpass
Dec. > 100°F (55°C) preheat
> Interpass
ϕ PWHT
ϕ PWHT
.9
ϕ Single, mixture, or %
ϕ Single, mixture, or %
ϕ Flow rate
.3
ϕ Current or polarity
ϕ Current or polarity
ϕ Tungsten electrode
.12
.26
1st layer — Heat input > 10%
1st layer — Heat input > 10%
.1
ϕ String/weave
.3
ϕ Orifice/cup or nozzle size
.5
ϕ Method of cleaning
.7
ϕ Oscillation
.15
ϕ Electrode spacing
.25
ϕ Manual or automatic
.26
± Peening
.38
ϕ Multiple to single layer
ϕ Multiple to single layer
.50
ϕ No. of electrodes
ϕ No. of electrodes
ϕ Filler metal delivery
.52
Legend:
+ Addition
− Deletion
> Increase/greater than
< Decrease/less than
↑ Uphill
↓ Downhill
46
← Forehand
→ Backhand
ϕ Change
ASME BPVC.IX-2015
Table QW-257
Welding Variables Procedure Specifications (WPS) — Plasma-Arc Welding (PAW)
Paragraph
QW-402
Joints
QW-403
Base Metals
QW-404
Filler Metals
QW-405
Positions
QW-406
Preheat
QW-407
PWHT
QW-408
Gas
QW-409
Electrical
Characteristics
Brief of Variables
Essential
Supplementary
Essential
Nonessential
.1
ϕ Groove design
.5
+
Backing
X
.10
ϕ Root spacing
X
.11
± Retainers
X
.5
ϕ Group Number
X
X
.6
T Limits
.8
ϕ T Qualified
X
.12
ϕ P‐Number/melt‐in
X
.3
ϕ Size
.4
ϕ F‐Number
X
.5
ϕ A‐Number
X
.12
ϕ Classification
.14
±
Filler metal
.22
±
Consum. insert
.23
ϕ Filler metal product form
X
.27
ϕ Alloy elements
X
.30
ϕ t
X
.33
ϕ Classification
X
.1
+
X
.2
ϕ Position
.3
ϕ ↑↓ Vertical welding
.1
X
X
X
X
X
Position
X
X
Decrease > 100°F (55°C)
.3
X
Increase > 100°F (55°C) (IP)
X
.1
ϕ PWHT
.2
ϕ PWHT (T & T range)
.4
ϕ Limits
.1
±
.4
ϕ Composition
.5
±
Or ϕ backing flow
.9
−
Backing or ϕ comp.
X
.10
ϕ Shielding or trailing
X
.21
ϕ Flow rate
.1
>
.4
ϕ Current or polarity
.8
ϕ I & E range
X
.12
ϕ Tungsten electrode
X
X
X
X
Trail or ϕ comp.
X
X
X
X
Heat input
X
X
47
X
