Carbon steel weld consumables with nickel restriction less than 1%
Carbon steel weld consumables with nickel restriction less than 1%
(OP)
We have an iso pentane sphere with design temperature of (0ºC to 50ºC) Material is type A516 Gr 70 and pressure 1.5Kg/cm2. Should carbon steel weld consumables electrodes for welding this sphere plates have a nickel restriction less than 1%?
An answer should be appreciated
Luis Marques
An answer should be appreciated
Luis Marques





RE: Carbon steel weld consumables with nickel restriction less than 1%
Check application with client.
RE: Carbon steel weld consumables with nickel restriction less than 1%
The isopropane sphere is not subjected to sour service but it can eventually be contaminated with p.p.m`s of H2S. In this case in your opinion shall we be mandatory in this requirement of 1% nickel restriction?
Best Regards
Luis Marques
RE: Carbon steel weld consumables with nickel restriction less than 1%
From what I have read, the 1% Ni limit is still a subject of debate within NACE. If you would like more information on this subject, there was an interesting paper published by NACE in 2004, #04649 titled "An Overview of NACE International Standard MR0103 and Comparison with MR0175. The paper compared Standard MR0175 with MR0103, with the discussion about the limit of 1% Ni.
As ijzer mentioned, check with the client. In my opinion, the 1% Ni limit is not required for this application.
RE: Carbon steel weld consumables with nickel restriction less than 1%
RE: Carbon steel weld consumables with nickel restriction less than 1%
I agree with you and I think that E7018-1 or E7018-G with a Ni % less than 1% will meet our purposes. The use of an electrode such as E8018-C1 is not ad equated to our needs.
Regards
Luis Marques