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Mehdi Eskandarzade
Other, Technical Inspector Qoordinator
G.G.S Group, Iran, Joined Mar 2006, 10

Mehdi Eskandarzade

Other, Technical Inspector Qoordinator
G.G.S Group,
Iran,
Joined Mar 2006
10
13:44 Jan-25-2017
API 5L X42 or X65 for H2S containing natural gas service

Hi All,

We want planning for our client's sour service natural gas pipeline system. You know API 5L X42 to X65 satisfies, the requirements of the NACE MR0175. But, I wonder if you can introduce me an any recommendation/document which compares X42 with X65. I want to know which one is much better for our application. We normally do our PWHT for thickness higher than 12.5mm for sour services; then, using X42 implies higher thickness and hence can bring the costly PWHT requirement.
On the other hand, X42 for a specific MAWP has a higher thickness and then it can be more resistive to corrosive environment.
There are many advantageous and dis advantageous for using both of them. But, some pratice can help me, if their is any.

Best Regards
Mehdi Eskandarzade

 
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