Interpretation 22-35
Subject: ASME B31.3-2008, Para. 328.5.1(c), Tack Welding Welder Performance Qualifications
Date Issued: October 5, 2009
File: 09-1003
Question (1): Does ASME B31.3, para. 328.5.1(c) require that tack welds, whether they are to
be incorporated into the final weld or be removed, be made by a qualified welder?
Reply (1): Yes.
Question (2): Does ASME B31.3, para. 328.5.1(c) require that tack welds be made to a qualified
WPS for that joint?
Reply (2): Yes; see para. 328.5.1(a).
Question (3): Does ASME B31.3, para. 328.5.1(c) allow tack welds on a groove weld joint to be
made by a welder qualified on a fillet weld test?
Reply (3): No. See ASME BPV Code Section IX, para. 303.2.
Regards,
Darcy Morin
Bantrel Management Services
mor...@bantrel.com
o - 780 979 6225
c - 780 782 5692
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Nowhere or any code didn’t specified for qualification method of a tack
welder.
Tack welding is also a welding and which it needs to be done by a 100%
qualified welder only and not having any short cut.
All the sub contractors are taking advantage by saying the name of tack
welder.
Thanks and Regards.................
Lakshman Kumar.B|Manager |Lanco Infratech Limited
Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004
Phone : + 91 671 2445033 | Mobile : +91 9937286851 |www.lancogroup.com
Go Green|The future will thank you
-----Original Message-----
From: material...@googlegroups.com
[mailto:material...@googlegroups.com] On Behalf Of samshuddin k
Sent: Tuesday, December 13, 2011 10:19 PM
To: materials-welding
Subject: [MW:13203] Tack welder qualification
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As per AWS D1.1, we have provision and can qualify. But finally Customer spec will govern.
With Kind Regards,
S.Elumalai.
This appears in UW-31(c) and PW-31.1.3
- If the tack welds are completely removed prior to welding the joint, then tack welders do not have to be qualified.
- If the tack welds are to be incorporated into the joint (i.e. welded over after suitable prep and inspection), then the welder must be a welder qualified as appropriate for making the joint weld per Section IX.
John
-----Original Message-----
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Lakshman Kumar.B
Sent: Tuesday, December 13, 2011 9:25 PM
To: material...@googlegroups.com
Subject: [MW:13205] RE: 13203] Tack welder qualification
On 12/13/11, Morin, Darcy (Bantrel Management Services)
According to ASME B31.3, which has a very strict requirement, Tack Welders are the same as Welders. B31.3 requires that ALL welding (temporary or permanent) on a groove joint be performed by a 'qualified' welder.
You will find flexibility in the fact that ASME B31.3 does not specify HOW they will be qualified.
One possible scenario: If an Examiner witnesses the root tacks being performed, and then RT the completed weld (Welded by a qualified welder); some say that this is enough to qualify the Tack Welder in the positions witnessed, if the tacks are visually acceptable and the RT passes examination to ASME section IX criteria.
Fillet Welders are not qualified to weld on a groove joint (See ASME BPV Code Section IX, para. 303.2).
It is important to ensure that anyone who is welding on the pressure envelope, temporary or permanent, undergoes a documented evaluation and verification of their ability to deposit sound weld metal which is acceptable to Owner and Jurisdiction.
Some other Governing Bodies (AWS, CSA for example) have different ways of qualifying Tack Welders. An expert in our discussion group can speak to this?
From: anthony chundal Sent: Πέμπτη, 28 Ιουλίου 2016 - 13:04 To: Materials & Welding Reply To: material...@googlegroups.com Subject: [MW:25155] Re: Tack welder qualification |
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/BLU183-W15A51C161BD8FC45EFA3828F010%40phx.gbl.
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