API 5L series Pipe & its welding rods inquiry

[PARAI Reaction Channel]

Dear Sirs,

Good day.

As per API 1104, we are going to run PQRs soon;

So, Please give your suggestion and comments for welding the following API 5L series of pipes with the selected Class of welding rods & Fillers :

First, let me know if the selected AWS class are OK to proceed or not ?

1) API 5L Gr. X42 : GTAW : AWS Class 5.18 ER70S-6 + FCAW : AWS 5.20 E71T-1C

2) API 5L Gr. X65 : GTAW : AWS 5.28 ER80S-Ni1 + SMAW : AWS 5.5 E8018-C3  

3) API 5L X70 : GT : AWS 5.28 ER80S-Ni1 + SMAW : AWS 5.5 E9018M (OR)

FCAW : AWS 5.29 E91T1-K2C 

Also recommend me for welding parameters such as Amps, Volts, Gases, Preheat, Post Heat, Interpass Temps with site links to make these PQRs successful.

Best Regards,

Saravanan Sornam,

Ansan-Si,

S.Korea