QW-202.2 Groove and Fillet Welds
(a) Qualification for Groove Full Penetration Welds.
Groove-weld test coupons shall qualify the thickness
ranges of both base metal and deposited weld metal to
be used in production. Limits of qualification shall be in
accordance with QW-451. WPS qualification for groove
welds shall be made on groove welds using tension and
guided-bend specimens. Notch-toughness tests shall be
made when required by other Section(s) of the Code. The
WPS shall be qualified for use with groove welds within
the range of essential variables listed.
(c) Qualification for Fillet Welds. WPS qualification for
fillet welds may be made on groove-weld test coupons
using test specimens specified in QW-202.2(a) or (b).
Fillet-weld procedures so qualified may be used for welding
all thicknesses of base metal for all sizes of fillet welds,
and all diameters of pipe or tube in accordance with table
QW-451.4. Nonpressure-retaining fillet welds, as defined
in other Sections of the Code, may as an alternate be
qualified with fillet welds only. Tests shall be made in
accordance with QW-180. Limits of qualification shall be
in accordance with table QW-451.3.
--Hi Colleagues,
I am working on a pipeline construction project in Mpumalanga –South Africa. The client is a reputable water utility company in South Africa who has appointed a contractor to construct 37 km of 610mm Diameter pipeline. The joint design is Partial Joint Penetration ( by means of fillet weld). The pipe fit up is spigot and socket joint.
The appointed inspection authority is refusing to accept welder qualification for 'v' grove joint design allegedly because the client specification has asked for fillet weld and NOT butt weld.
Requalification of welders is not an issue apart from the time it will take to set up and get the qualification test done. I also know from training that range of approval for grove includes fillet welds as well.
Should I simply re-qualify the welders although their qualification covers fillet welds if range of approval is considered or should I insist on the inspection authority consulting for proper information on this matter?
The integrity of the profession is under threat if people without proper knowledge are allowed to rewrite the specifications for the industry and go unchallenged.
Your urgent response will be greatly appreciated.
MALEMELA N. S.
SITE MANAGER
SOUTHERN PIPELINE CONTRACTORS
6 Main Reef Road
DUNSWART
1508
TEL:0119148519
FAX:0119144524
CELL:0823892592
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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