RE: RE: Flattening limits for pipes

From: <Saha>
Date: Tue Jul 05 2005 - 00:06:00 EDT


For ethylene service at -110 degree C, SS304 or SS 304L is sufficient as per shell DEP and total spec. other materials are also possible as per ANSI B 31.3 or ASME SEC II part D but cost point of view for piping material this is sufficient for the service and temperature. For valve trims etc other materials like SS316 etc are used.

Tanmoy

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=smT-CCAlaeLd3Oij5tKA1fDooRLle65EpDDkP4qd5akvUtz4TjF8aLs3a-_pEfs28SX5N0FTDprGvbldaFwYF4y3KQs9">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=smT-CCAlaeLd3Oij5tKA1fDooRLle65EpDDkP4qd5akvUtz4TjF8aLs3a-_pEfs28SX5N0FTDprGvbldaFwYF4y3KQs9">PipingDesign@yahoogroups.com</a>] On Behalf Of kuralenthi
Sent: Tuesday, July 05, 2005 2:38 AM
To: <a href="/group/PipingDesign/post?postID=smT-CCAlaeLd3Oij5tKA1fDooRLle65EpDDkP4qd5akvUtz4TjF8aLs3a-_pEfs28SX5N0FTDprGvbldaFwYF4y3KQs9">PipingDesign@yahoogroups.com</a> Subject: Re: RE: [PipingDesign] Flattening limits for pipes

  316 OR 316L or 9% nickel piping (ASTM A333 GRADE8) and corresponding fittings (astm A350/ ASTM A 420 WPL8 ), FOR SS FITTINGS LOOK INTO ASTM A 403 LIST. SS PIPES LOOK INTO SS316 OR 316 L. look into ASME SEC II A.

REGARDS
KURAL

Can anyone help , finding replies to following queries:

  1. What is the ideal material of construction for pipes handling Cryogenic ethylene for operating temp of -110 degree C ?Also for flanges , bends , gaskets and fasteners . 2.What should be thickness of cold insulation for same operating temp and the ambient temp as 50 degree C .Also where I can locate specification for the type of insulation.

thanks ,
Goswami

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