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welding procedure

welding procedure

(OP)

PQR P8 TO P8 Can support TO P10H - P10H WPS.( DUPLEX STEEL)
MY understanding this PQR Won't SUPPORT even filler material is same.
my understanding Base metal group is different 7 base metal is essential element.
please clarify me if i am wrong.
stanly


RE: welding procedure

Your P-No 8 to P-No 8 WPS/PQR cannot support a weld to P-No 10H.

RE: welding procedure

(OP)

YES that what I said to him when i was inspecting.
when i was inspecting I SEEN PQR P8 TO P8 & THEY attached WPS P10H TO P 10H TO P10H.
both filler material group F NO 6.

other side person showed me QW-424.

One metal from a P-Number to any metal from any other P- Number ----
Base Metals Qualified
Any metal assigned the first P-Number to any metal assigned the second P-Number

THEN I SHOWED HIM

QW-403.l A change from a base metal listed under
one P-Number in Table QW /QB-422 to a metal listed under
another P-Number or to any other base metal. When
joints are made between two base metals that have different
P-Numbers, a procedure qualification shall be made
for the applicable combination of P-Numbers, even
though qualification tests have been made for each of
the two base metals welded to itself.

i said group number is essential element .
PQR -P8 is p8 ( Austenitic steel) not support to WPS- P10H TO P10H ( DUPLEX STEEL).

regards
stanly





RE: welding procedure

Don't get confused on group number and P#. Group # is only essential when impacts are required, while P# is always essential.
Of course a P8-P8 PQR cannot support a P10H - P10H WPS.....kinda scary considering this is basic stuff.

RE: welding procedure

Your "other person" has misinterpreted QW-424.

RE: welding procedure

The other side person is possibly confusing the rules in QW-423 (Welder Qualification) with [QW-424]Welding Procedure Qualification...

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