NACE MR 0103 compliance 1

[LahaneD]

I have to weld a 10 mm thick A 182 F 316 material with A 350 LF2 material.
The compliance is required as per NACE MR 0175 & MR 0103.
Is PWHT required for this joint as per above two std?.
If customer has not specified any of the practises which are outlined in RP 0472, how the compliance can be given in this case? Is the control on chemical composition is sufficent only?

 

[strider6]

NACE MR 1075 apply to upstream while the MR0103 apply to refinery/downstream. I think you've to made clear which standard you've to comply with.

AN OVERVIEW OF NACE INTERNATIONAL STANDARD MR0103 AND COMPARISON WITH MR0175

http://www.documentation.emersonpro...iclesreprints/nace_overview_corrosion2004.pdf

http://www.corrosionist.com/Corrosion_Control_Offshore_Oil_Gas.htm

S

Corrosion & Rust Prevention Control

 

[LahaneD]

I have to comply with NACE MR0103

 

[jrupert24]

If they specified MR0103 and you have carbon steel in the equation, you will need to follow RP0472. Are you working to the latest version - RP0472-2010? You do not have to PWHT carbon steels in either MR0175 or MR0103, however, you do need to demonstrate your materials, welding process and fabrication methods ensure hardness below the maximum hardness permitted for each code. A350 LF2 has quite a range of carbon equivalent and it can be difficult to get it chemistry controlled to the recommended value of 0.43 and near impossible to get anyone to give you any less than 0.43. My experience is that it is difficult to meet the HAZ on A350LF2 without a stress relief with even a 0.43 CE, however, it can be done with creative process controls. If I were the client, I would definitely want to see a weld procedure with hardness survey (on the A350 LF2 side) per the latest MR0103 figures. The stainless weld and material will not be an issue to meet MR0103. RP0472-2010 is a booger.

 

[PAN]

0472 is now an SP document, not an RP document...

 

[jrupert24]

You're correct...typo on my part... So used to writing "RP".