Dear Sajit
One factor which is very important is the seamless or welded type pipe.It is possible that the pipe used in the sour service is welded but the one in non-sour service is seamless.Also some contractors select the thickness in accordance with market availability of the material irrespective of the required calculated thickness and offer their Piping Material Specification based on market not design!!!
Cheers
Mani
Sajit Viswan <sviswan@tebodin.co.om> wrote: I have 2 - 900# CS Shell piping classes, one for SOUR the other non-SOUR is identical in pipe material and the corrosion allowance. Material is ASTM A 333 Gr 6. CA = 3 mm. The pressure temperture ratings are also the same. However the thickness differs for the same size, 12". For the non-SOUR class it is sch 120 and for the SOUR is sch 100. Which is about 4 mm less thick. What is that which makes the thickness lesser for the SOUR service material. Any guesses?
Sajit
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[Non-text portions of this message have been removed] Received on Sat Jun 26 09:27:00 2004
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