Flange Buttering
sankar krishnan
Jim Price
Please see UW 42 of ASME Section VIII Div 1. A butt welding procedure is enough for buttering.
UW-42 SURFACE WELD METAL BUILDUP
Construction in which deposits of weld metal are applied to the surface of base metal for the purpose of:
(a) restoring the thickness of the base metal for strength consideration; or
(b) modifying the configuration of weld joints in order to provide the tapered transition requirements of UW-9(c)
and UW-33(b) shall be performed in accordance with the following rules:
(1) A butt welding procedure qualification in accordance with provisions of Section IX must be performed for
the thickness of weld metal deposited, prior to production welding.
(2) All weld metal buildup must be examined over the full surface of the deposit by either magnetic particle
examination to the requirements of Appendix 6, or by liquid penetrant examination to the requirements of Appendix 8.
When such surface weld metal buildup is used in welded joints which require full or spot radiographic examination,
the weld metal buildup shall be included in the examination.
Reference Appendix 6 Section VIII Div 1
Buildup QW202.3
Thickness QW451.1
Best Regards
Jim Price | Welding Engineer, CWI
Direct: 320.7463439 | Fax: 417-862-5564
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sankar bombay
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shankar
dili...@gmail.com
| From: sankar bombay Sent: Πέμπτη, 25 Φεβρουαρίου 2016 - 05:37 Reply To: material...@googlegroups.com Subject: Re: [MW:24366] Flange Buttering |
Lakshman
Hi Friend,
Instead of flange buttering and re machining you can go for a layer build up on the pipe, and particularly for your case pipe has ovality, then as per the gap positions you can deposit single layer or multiple layer and have a proper grinding to give proper fitup to flange.
Thanks & Regards,
Lakshman Kumar B,
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of sankar krishnan
Sent: Tuesday, February 23, 2016 11:08 AM
To: Materials & Welding
Subject: [MW:24361] Flange Buttering
Dear All,
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sankar bombay
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shankar
Lakshman
There is no code for the same,
However as suggested by some of our friends, same WPS can be used for 1 or 2 layer deposition.
And regarding heat treatment – it depends on the MOC, flange size, thickness, deposited weld thickness, and any more heat treatment done during manufacturing etc has to be reviewed,
And finally – convince client once again - that it is some tolerance matter and pipe ovality issue and not the flange concern.
If the pressure ratings are of nominal, than no need of all these manipulation, you can directly weld it.
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of sankar bombay
Sent: Thursday, February 25, 2016 3:18 PM
To: material...@googlegroups.com
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