Welding L-80 Type-1 Tubing to AISI 4130 Hammer Union

[S.G]

Dear All,

We need to weld an L-80 Type-1 tubing to an AISI 4130 Hammer Union. This assembly will be used on a well testing package vent/flare line.

We already have the WPS and supporting PQR for base metal AISI 4130 or its equivalent. Post-weld heat treatment (PWHT) will be carried out, and our engineering contractor has successfully performed this for other operators.

Do you foresee any issues with this approach?

Best regards,

 

[jmec87]

This should be fine, as long as the chemistry, mechanical properties, and tempering temperature of the L80 tubing are suitable for your qualified WPS and PWHT temperature.