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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...316 or 316L for Sour Service Piping316 or 316L for Sour Service Piping
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2/19/2006 9:00 AM
 
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we are looking to use 316 for a gas seperator outlet line. CO2 is 2.5M% and H2S is 1M% and temp 55 to 60'C + condensed water (probable pH calc not reliable). As this is a marine environment there is a potential for external CSCC so the line will be coated. Would 316L give significant benefit over 316 in terms of resistance to intergranular attack on the piping butt welds. Also we would intend to use PWHT stress relief to reduce the possibility of CSCC. I have heard of slight embrittlement problems when PWHT used on 316L anyone got any experience of the likelihood and severity of this? Your feedback appreciated Jack
 
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2/26/2006 9:00 AM
 
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Jack: Either 316SS or 316LSS should be resistant to the internal environment. However, the "L" grade of 316 is almost universally used now in welded construction due to its increased resistance to intergranular corrosion in some aqueous environments. Post weld heat treating 316LSS is not necessary nor is it advised. David Hendrix The Hendrix Group Inc.
 
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7/25/2007 9:00 AM
 
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try ss 316 or csrbon steel calorised. It will work. you can buy from us
 
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HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...316 or 316L for Sour Service Piping316 or 316L for Sour Service Piping


  

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