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SA 516 Gr 70 HIC Plate

SA 516 Gr 70 HIC Plate

SA 516 Gr 70 HIC Plate

(OP)
Can someone tell me at what level of H2S do we have to use HIC plate. I have an exchanger with a stream containing 100ppm H2S  140F to 200F @ 60psia.
Is there a table or chart that will tell me this ?

Thanks
KWG

RE: SA 516 Gr 70 HIC Plate

KWG53;
I had come across a publication from Bethlehem Lukens Steel (web site www.bethsteel.com/customers/pdfs/pressure.pdf) that has a section on hydrogen induced cracking (HIC) resistant steel plate (low sulfur contents). The Bethlehem Lukens publication references a NACE publication 8X194 titled 'Materials and Fabrication Practices for New Pressure Vessels used in Wet H2S Service". I believe it contains categories of H2S service for pressure vessel plates.

RE: SA 516 Gr 70 HIC Plate

See NACE MR0175 or new ISO 15156. You also need to know Ph value.

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