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This document provides you the basic information on essential variables for welding performance qualifications (WPQ). It takes you through the all the necessary details to understand the qualification criteria for a welder. After going through this document, you would be able to know about the essential variables and their approval ranges for SMAW and GTAW processes. It also guide as how WeldPulse software helps in verification of welders qualification and calculating the approval ranges.
Citation preview
How to
verify welder
qualification
ASME IX code
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to
verify welder
qualification to
ASME IX code
Sales: [email protected]
ngineering Pulse © 2013
2 | P a g e
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to verify welder qualification
Welding and welding inspection engineers often need to verify the welder qualification for a welding
job he is going to do. Welder can belong to their company or provided by the fabricator, constructor
need to carry out a welding job. The
contains all the approval ranges and verification can be done straight away whether he is qualified or
requires requalification. However in some case, WPQ is condensed in a card form which w
with them while doing the job and welding engineers and inspectors need to verify whether they are
doing the same job for which they are qualified. That condensed information should enlist all the
essential variables which upon any change call
variables is required to verify welder qualification.
critical for welding performance qualifications is required.
welders qualification according to the requirements of ASME Sec. IX.
Sales: [email protected]
ngineering Pulse © 2013
ow to verify welder qualification to ASME IX
Welding and welding inspection engineers often need to verify the welder qualification for a welding
job he is going to do. Welder can belong to their company or provided by the fabricator, constructor
need to carry out a welding job. The first thing to do is to obtain the WPQ for the welder. WPQ itself
contains all the approval ranges and verification can be done straight away whether he is qualified or
requires requalification. However in some case, WPQ is condensed in a card form which w
with them while doing the job and welding engineers and inspectors need to verify whether they are
doing the same job for which they are qualified. That condensed information should enlist all the
essential variables which upon any change call for a requalification. Still, understanding of the essential
to verify welder qualification. On to this, correct information of F
critical for welding performance qualifications is required. This document will help yo
welders qualification according to the requirements of ASME Sec. IX.
First Words
Info: [email protected] [email protected]
Welding and welding inspection engineers often need to verify the welder qualification for a welding
job he is going to do. Welder can belong to their company or provided by the fabricator, constructor
first thing to do is to obtain the WPQ for the welder. WPQ itself
contains all the approval ranges and verification can be done straight away whether he is qualified or
requires requalification. However in some case, WPQ is condensed in a card form which welders keep
with them while doing the job and welding engineers and inspectors need to verify whether they are
doing the same job for which they are qualified. That condensed information should enlist all the
understanding of the essential
-numbers which is
This document will help you in verifying the
3 | P a g e
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to verify welder qualification
Fig. 1 Representation of properties linked with Ferrite Number
Essential variables of
The first thing to know about is the essential variables for welding performance qualification.
Only after understanding each essential variable, you would be able to verify if the welder is
qualified for a new welding job or not.
Please note that essential variables are different for different welding processes.
See for shielded metal arc welding, th
see if the welder is qualified to do your job. Not a single one should be ignored or missed out
while verification. There are cases when peop
with the essential variable of procedure qualification. L
essential variable means if the qualification was done with backing then the welder cannot weld
without backing material. However this variable doesn’t affect proced
Similarly, change in pipe diameter is an essential variable for welder qualification and not for
procedure qualification. Change in F
well as for welder qualification. Every sin
pages.
Addition in welding position
Change up or down for
vertical welds
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ow to verify welder qualification to ASME IX
Fig. 1 Representation of properties linked with Ferrite Number
Essential variables of welding performance qualifications
The first thing to know about is the essential variables for welding performance qualification.
er understanding each essential variable, you would be able to verify if the welder is
qualified for a new welding job or not.
Please note that essential variables are different for different welding processes.
See for shielded metal arc welding, there are seven essential variables which must be verified to
see if the welder is qualified to do your job. Not a single one should be ignored or missed out
while verification. There are cases when people miss an essential variable or they confuse them
the essential variable of procedure qualification. Like removal of backing material is an
essential variable means if the qualification was done with backing then the welder cannot weld
without backing material. However this variable doesn’t affect procedure qualification.
Similarly, change in pipe diameter is an essential variable for welder qualification and not for
procedure qualification. Change in F-numbers is an essential variable for welding procedure and
well as for welder qualification. Every single essential variable is being discussed on the next
SMAW
Removing backing material
Change in pipe
diameter
Change in P-number
Change in F-number
Change in weld
deposit thickness
Addition in welding position
Change up or down for
vertical welds
Info: [email protected] [email protected]
Fig. 1 Representation of properties linked with Ferrite Number
welding performance qualifications
The first thing to know about is the essential variables for welding performance qualification.
er understanding each essential variable, you would be able to verify if the welder is
ere are seven essential variables which must be verified to
see if the welder is qualified to do your job. Not a single one should be ignored or missed out
they confuse them
ike removal of backing material is an
essential variable means if the qualification was done with backing then the welder cannot weld
ure qualification.
Similarly, change in pipe diameter is an essential variable for welder qualification and not for
numbers is an essential variable for welding procedure and
gle essential variable is being discussed on the next
4 | P a g e
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to verify welder qualification
Change in P-number
P-number is an essential variable of welder qualification with few exceptions. WeldPulse
software helps you in calculating the approval ranges for different P
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ow to verify welder qualification to ASME IX
number
number is an essential variable of welder qualification with few exceptions. WeldPulse
software helps you in calculating the approval ranges for different P-numbers as shown below:
Info: [email protected] [email protected]
number is an essential variable of welder qualification with few exceptions. WeldPulse
hown below:
5 | P a g e
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to verify welder qualification
Change in F-number
Except few exceptions a change in F
are for different F-numbers with /without backing. Like a welder qualified with F
without backing is qualified to work with F
with or without backing. WeldPulse software helps you in looking for the approval range of F
number as shown below:
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ow to verify welder qualification to ASME IX
Except few exceptions a change in F-number requires re-qualification. The exceptions associated
numbers with /without backing. Like a welder qualified with F
to work with F-number 1, 2 and 3 with backing and with F
with or without backing. WeldPulse software helps you in looking for the approval range of F
Info: [email protected] [email protected]
qualification. The exceptions associated
numbers with /without backing. Like a welder qualified with F-number 4
and with F-number 4
with or without backing. WeldPulse software helps you in looking for the approval range of F-
6 | P a g e
A product of Engineering Pulse Limited, UK
Logos, names used within this document are copyrighted by EngAny unauthorized use is illegal and strictly prohibited.
How to verify welder qualification
Change in weld deposit thickness
Change in weld deposit thickness
approval range needs to be complied with. Following are the images showing how WeldPulse
provides the approval ranges.
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ow to verify welder qualification to ASME IX
eld deposit thickness
Change in weld deposit thickness is also an essential variable for welder qualification. Its
approval range needs to be complied with. Following are the images showing how WeldPulse
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is also an essential variable for welder qualification. Its
approval range needs to be complied with. Following are the images showing how WeldPulse
7 | P a g e
A product of Engineering Pulse Limited, UK
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How to verify welder qualification
Addition in welding position
An addition in welding position is an e
ASME IX requirements and then welder may or may not need requalification. For example, if a
welder is qualified on a plate with groove joint in 3G, he is qualified to weld
position for plate and pipe over 24 in OD. Below this diameter till 2
position only.
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ow to verify welder qualification to ASME IX
elding position
An addition in welding position is an essential variable. Any addition should be assessed as per
ASME IX requirements and then welder may or may not need requalification. For example, if a
welder is qualified on a plate with groove joint in 3G, he is qualified to weld in flat and vertical
ion for plate and pipe over 24 in OD. Below this diameter till 2-7/8” OD, he can weld in flat
Info: [email protected] [email protected]
ssential variable. Any addition should be assessed as per
ASME IX requirements and then welder may or may not need requalification. For example, if a
in flat and vertical
7/8” OD, he can weld in flat
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A product of Engineering Pulse Limited, UK
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How to verify welder qualification
Change up or down for ver
Except cover or wash pass, upward or downward progression for any vertical weld requires
requalification.
Removal of backing material
The removal of backing material in single welded groove welds requires requalification. Double
welder groove welds are considered welding with backing.
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ow to verify welder qualification to ASME IX
p or down for vertical welds
Except cover or wash pass, upward or downward progression for any vertical weld requires
acking material
The removal of backing material in single welded groove welds requires requalification. Double
welder groove welds are considered welding with backing.
Info: [email protected] [email protected]
Except cover or wash pass, upward or downward progression for any vertical weld requires
The removal of backing material in single welded groove welds requires requalification. Double
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A product of Engineering Pulse Limited, UK
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How to verify welder qualification
GTAW – Gas Tungsten Arc Welding
For GTAW, there are 12 essential varia
processes are not discussed again. Only the variables which are different in GTAW are discussed.
Change in
thickness
Addition in welding position
Change up or down
for vertical welds
Deletion of backing
gas
Change in current or
Addition or deletion of
Addition or deletion of filler metal is an essential variable. If a welder is qualified with filler metal then
he is not qualified to weld without filler and vice versa.
Addition or deletion of
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ow to verify welder qualification to ASME IX
Gas Tungsten Arc Welding
For GTAW, there are 12 essential variables. Common essential variables for SMAW and GTAW
processes are not discussed again. Only the variables which are different in GTAW are discussed.
GTAW
Removal of backing material
Change in pipe
diameter
Change in P-number
Addition or deletion of filler metal
Change in F-number
Addition or deletion of
insertsChange in product
form
Change in weld
deposit thickness
Addition in
Deletion of
Change in current or
polarity
Addition or deletion of filler metal
Addition or deletion of filler metal is an essential variable. If a welder is qualified with filler metal then
he is not qualified to weld without filler and vice versa.
Addition or deletion of inserts
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. Common essential variables for SMAW and GTAW
processes are not discussed again. Only the variables which are different in GTAW are discussed.
Addition or deletion of filler metal
Addition or deletion of filler metal is an essential variable. If a welder is qualified with filler metal then
10 | P a g e
A product of Engineering Pulse Limited, UK
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How to verify welder qualification
Change in product form
Deletion of backing gas
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ow to verify welder qualification to ASME IX
product form
backing gas
11 | P a g e
A product of Engineering Pulse Limited, UK
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How to verify welder qualification
Final Words
While managing welders for welding job, it is pertinent to know about the essential variables for the
welding processes they are qualified to weld with. This knowledge helps in understanding the
changing scenarios while managing them and using on several o
provides you a competitive edge in verifying a welder’s qualification in lesser time.
Sales: [email protected]
ngineering Pulse © 2013
ow to verify welder qualification to ASME IX
While managing welders for welding job, it is pertinent to know about the essential variables for the
welding processes they are qualified to weld with. This knowledge helps in understanding the
changing scenarios while managing them and using on several other welding jobs. WeldPulse software
provides you a competitive edge in verifying a welder’s qualification in lesser time.
Info: [email protected] [email protected]
While managing welders for welding job, it is pertinent to know about the essential variables for the
welding processes they are qualified to weld with. This knowledge helps in understanding the
ther welding jobs. WeldPulse software