Buttering as per ASME VIII

[azmir]

Good day.
I would like to know whether buttering is allowed in ASME VII code to
make the loss thickness due to corrosion. What are the guideline? The
material is SA-537-CL 1.

Regards,
Amir Zakee
Putrajaya
Malaysia

[Arunachalam A]

ASME SECTION VIII DIV 1:
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.

ARUN

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