Hi everyone,

I just want to know if during material receiving the required is API 5L Gr.B PSL2 SCH.20 but supplier delivered API 5L GR.B PSL2 SCH.30/STD., is this acceptable?My idea is that a document signed by the client allowing this specification change is necessary,is that correct?In welding, will it have an effect on the wps?

I am looking forward for your replies.

Thanks.