Impact testing is required.
Manufacturer enters in the SAW process PQR range for the parameters which form the Heat Input e.g.
A 500 - 550, V 28 - 30, vel. 20 - 25 cm/min.

Enters the same range of parameters in WPS.

I do not agree, because the maximum HI in WPS shall not exceed the minimum HI of PQR.
The W.E. of the Manufacturer does not accept this interpretation. Is there any Code interpretation which helps to clarify?

Thanks to volunteers.
Mauro

I guess I'm trying to understand your worry?



In my opinion this is wrong, but rather as the WE has specified and should be interpreted as shall not exceed the MAXIMUM qualified.

Hi,

I think the welding engineer is right.

That means the maximum heat input in WPS shall not exceed the maximum heat input of the supporting PQR

Please find this interpretation for clarification:
Interpretation: IX-81-19
Subject: Section IX, QW-409.1 and QW-410.7
Date Issued: March 27, 1981
File: BC80-299
….
Question (4): If QW-409.1 does not require that average heat input be determined, how is the heat input established for multiple pass procedure qualification? Must it be established for each pass?
Reply (4): QW-409.1 requires requalification when an increase in heat input occurs over that qualified. Maximum heat input is established during procedure qualification by determination of the maximum amperage and voltage in combination with the least travel speed, or, alternatively, the maximum volume of weld metal deposited per unit length of weld. Heat input is not required to be determined for each pass.
….

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Kind regards,
Juergen Fleischfresser