Thursday, August 6, 2020

[MW:31286] Low Temperature and LPG Service, is required NACE requirements ?

Dear Experts,

Good Morning

I have a piping class with Low-Temperature Service. LPG Service.

WPS and PQR Details as below :

Material: ASTM A333 Gr.6 to ASTM 350 Gr.LF2.

Thickness - 12.7 mm, WPS Thickness Range - 6.35 mm to 18.00mm 

Process - GTAW+SMAW

AWS Class- ER80S-Ni 1 / E7018 H4 R , SFA No- A5.28 / 5.1,

Impacte test @ -48°C 

Hardness - 228 HV

According to my line class required  Low Temperature and LPG Service.

I understand that sour service required NACE requirements.

I have a doubt regarding the above service required NACE requirement, so how I can know that service required NACE or Not.

And according to API 582 ER80S-Ni 1 not recommended and also hardness value shall be 225 BHN, but I couldn't find the hardness in API 582? 

My client is not accepting  ER80S-Ni 1 / Hardness - 228 HV, he needs according to API 582.

Please I am looking at your feedback in details on my doubt.

Thanks in advance.

Regards 

Kiran

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