preheat temp
preheat temp
(OP)
I had a customer spec which states that min preheat temp for material having tensile above 485 Mpa shall be 100 C. My material is LTCS A350 LF2 & A333 Gr 6.
I have a previously qualified PQR in which preheat temp was 80 C.
I submitted the same for approval & it got rejected only because preheat in PQR was 80 C though i mentioned preheat in WPS 100 C min.
can i have a chance to convince customer with existing PQR.Design code is 31.3 & thickness of job is 10.97 mm.
I have a previously qualified PQR in which preheat temp was 80 C.
I submitted the same for approval & it got rejected only because preheat in PQR was 80 C though i mentioned preheat in WPS 100 C min.
can i have a chance to convince customer with existing PQR.Design code is 31.3 & thickness of job is 10.97 mm.





RE: preheat temp
RE: preheat temp
In both cases your 100 Deg. specified should be accepted.
RE: preheat temp
Show your client Table 330.1.1 from B31.3.
There is nothing remotely near 100 degrees C for that wall thickness,
Regards,
Kiwi