QW-256.1 Welding Variables Procedure Specifications (WPS) — Gas Tungsten‐Arc Welding (GTAW)
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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-407
PWHT
QW-408
Gas
QW-409
Electrical
Characteristics
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
This copy downloaded on 2015-07-13 07:36:37 -0500 by authorized user logan ahlstrom.
QW-406
Preheat
Brief of Variables
Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).
ASME BPVC.IX-2015
No fu
Table QW-257
Welding Variables Procedure Specifications (WPS) — Plasma-Arc Welding (PAW) (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 Multiple to single pass/side
X
X
.10
ϕ Single to multiple electrodes
X
X
.11
ϕ Closed to out chamber
.12
ϕ Melt‐in to keyhole
.15
ϕ Electrode spacing
X
.26
±
X
.64
X
X
X
Peening
Use of thermal processes
X
Legend:
+ Addition
− Deletion
↑ Uphill
↓ Downhill
> Increase/greater than
< Decrease/less than
ϕ Change
This copy downloaded on 2015-07-13 07:36:37 -0500 by authorized user logan ahlstrom.
48
← Forehand
→ Backhand
Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).
ASME BPVC.IX-2015
No fu
ð15Þ
Table QW-257.1
Welding Variables Procedure Specifications (WPS) — Plasma-Arc Welding (PAW)
Special Process Variables
Essential Variables
Hard‐Facing Overlay (HFO)
(QW-216)
Paragraph
QW-402
Joints
QW-403
Base Metals
.16
<
Finished t
>
.20
ϕ P‐Number
ϕ P‐Number
.23
ϕ T Qualified
ϕ T Qualified
.12
ϕ Classification
.14
± Filler metal
± Filler metal
.23
ϕ Filler metal product form
ϕ Filler metal product form
ϕ > 10% Powder feed rate
ϕ > 10% Powder feed rate
.41
ϕ Particle size
ϕ Particle size
ϕ Powder type
ϕ Powder type
+
+
ϕ Powder feed rate
.46
.4
Position
Dec. > 100°F (55°C)
preheat > Interpass
Position
Dec. > 100°F (55°C)
preheat > Interpass
.6
ϕ PWHT
Dec. > 100°F (55°C)
preheat > Interpass
ϕ PWHT after fusing
ϕ PWHT
.1
.16
±
ϕ > 5% Arc or metal feed gas ϕ > 5% Arc or metal feed gas ϕ > 5% Arc or metal feed gas
.17
ϕ Type or mixture
ϕ Type or mixture
.18
ϕ > 10% Mix. comp.
ϕ > 10% Mix. comp.
.19
ϕ Plasma/feed gas comp.
.20
ϕ Plasma gas flow‐rate range
.4
ϕ Current or polarity
ϕ Current or polarity
ϕ Type or size of electrode
.12
ϕ > 10% I & E
.23
.24
ϕ > 10% Filler wire watt.
ϕ > 10% Filler wire watt.
.25
ϕ > 10% I & E
ϕ > 10% I & E
49
Trail or π comp.
This copy downloaded on 2015-07-13 07:36:37 -0500 by authorized user logan ahlstrom.
QW-409
Electrical
Characteristics
Position
ϕ PWHT
.7
.9
QW-408
Gas
+
ϕ Preheat maintenance
.5
QW-407
PWHT
ϕ P‐Number
ϕ > 5% Particle size
.43
QW-406
Preheat
Finished t
ϕ A‐Number
.44
.4
Nonessential Variables
for HFO, CRO, and HFSF
ϕ Classification
.42
QW-405
Positions
Hard‐Facing Spray Fuse
(HFSF) (QW-216)
< Finished t
.17
.37
QW-404
Filler Metals
Corrosion‐Resistant Overlay
(CRO) (QW-214)
Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).
ASME BPVC.IX-2015
No fu
Table QW-257.1
Welding Variables Procedure Specifications (WPS) — Plasma-Arc Welding (PAW) (Cont'd)
Special Process Variables
Essential Variables
Hard‐Facing Overlay (HFO)
(QW-216)
Paragraph
QW-410
Technique
Corrosion‐Resistant Overlay
(CRO) (QW-214)
Hard‐Facing Spray Fuse
(HFSF) (QW-216)
.1
ϕ String/weave (HFO
and CRO only)
.3
ϕ Orifice/cup or
nozzle size
.5
ϕ Method of cleaning
.7
ϕ Oscillation
.25
ϕ Manual or
automatic
.26
±
.38
ϕ Multiple to single layer
ϕ Multiple to single layer
.41
ϕ > 15% Travel speed
ϕ > 15% Travel speed
ϕ Multiple to single layer
.43
ϕ > 10% Travel speed range
.44
ϕ > 15% Torch to workplace
.45
ϕ Surface preparation
.46
ϕ Spray torch
.47
ϕ > 10% Fusing temp. or
method
.48
ϕ Transfer mode
ϕ Transfer mode
.49
ϕ Torch orifice diameter
ϕ Torch orifice diameter
ϕ Transfer mode
.52
ϕ Filler metal del.
ϕ Filler metal del.
Legend:
> Increase/greater than
< Decrease/less than
↑ Uphill
↓ Downhill
50
← Forehand
→ Backhand
ϕ Change
Peening
This copy downloaded on 2015-07-13 07:36:37 -0500 by authorized user logan ahlstrom.
+ Addition
− Deletion
Nonessential Variables
for HFO, CRO, and HFSF
Copyrighted material licensed to University of Toronto by Thomson Scientific, Inc. (www.techstreet.com).
ASME BPVC.IX-2015
No fu
