hi gents,

Code 31.3
Impact test required.

My client requested to me to prepare a separate new PQR for API 5L X60 pipes,although we have PQR for 1(1) to 1(3) with E7018-1. I offered to use E8018-G, which is ready in our stock. i received a comment as i may use E8018G if it has batch certificate which shows Ni% is more than 0.8  also they recommend me to use E8018-C3 instead of E8018G because of hi Ni content in it

I would like to ask,

1- A number of E8018-G electrode is 1 or 10  ( Ni % 0.82)

2-If i put 10 as A number,is it possible to use E8018-G (Ni % less than 0.80,for example 0.65)

3- According to Sec. II part C,

min Ni % 0.5 for E8018-G
min Ni % 0.8 for E8018-C3

Can anybody tell me please , how this 0.3% Ni is affecting the weld pool and HAZ metallurgically ?

4- Why do i need to prepare a new PQR ?

Thanks,

T,