Monday, November 28, 2016

[MW:25771] reg: Maximum interpass temperature in a WPS

Dear Sir's,

Kindly reply to  my below query:

We have project approved WPS with following details:

Material Spec: ASTM A106 Gr.B

P no:1/Group no:1

Material thickness: 1.5 -14.22 mm

Welding process: GTAW+SMAW

GTAW-Filler wire : ER 70S-2

SMAW-Electrode: E 7018

Preheat - 10 deg minimum

Interpass temp: 200 Deg C Maximum

In the PQR: pre heat temperature:38 deg C

                  Interpass temperature: 68 deg C maximum



Since interpass temperature is not a essential variable (Impact test is not applicable); but still our client is asking to recheck the max.interpass temperature value ( 200 Deg C) in the WPS. How to convince client to get approval on the same?






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