Dear Mr Robert,
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.
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
On Thu, Feb 3, 2011 at 11:52 PM, sooeey2u <robertp@westernp.com> wrote:
For future use, need to have a qualified "buttering" weld procedure in
place to use for closing a root opening in a repair situation.
As per Section IX QW-283, I intend to quality a basic butt welding
procedure specification using a .375" thk P-1 matl. plate, single V
groove joint design with metal backing with SMAW process. The root
opening will purposely be large and will surface weld metal buildup
with a deposit of .1875" thk, then make subsequent weld passes to join
the members.
During each deposition pass of weld metal, the surface shall receive
magnetic particle examination to reqs of Appendix 6 of Sec VIII Div 1.
After successfull PQR and subsequent WPQ tests, what thickness range
of "butter" weld metal is the production welder qualified to?
According to QW-283.3 Buttering Thickness, I understand that if
thickness of "butter" weld metal is less than .1875" that the actual
deposited "butter" weld metal becomes the minimum qualified
thickness. And I would assume the maximum thickness would be twice
the deposited "butter" weld metal thickness.
My ? is what would be the minimum & maximum qualified thickness for .
1875" deposited "butter" weld metal thickness?
Thanks in advance for comments and advice,
QCRobert
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