Dear Mr. Pradeep, Yes you are right. Please throw some more light on this issue Material : ASTM A333 Gr. 6 Design code : ASTM B31.3 Service : LNG line Impact requirement : yes @ -21° C Thanks for the suggestions. Nandesh
--- On Wed, 27/1/10, pgoswami <pgoswami@quickclic.net> wrote:
From: pgoswami <pgoswami@quickclic.net>
Subject: [MW:4156] RE: 4151] RE: 4150] ASME SEC IX...PWHT?
To: materials-welding@googlegroups.com
Date: Wednesday, 27 January, 2010, 3:48 AM
Looking at your query, if the material of construction is P No/S No-1 then PWHT is mandatory over ¾" or 20 mm pipe wall thickness. This is the PWHT criteria as per B-31.3 -2008 code. If the design code is not B-31.3 then PWHT requirements of the applicable design code will follow. Do you have impact requirements for LNG piping if so @ what temperature?. If you could provide those details e.g. materials grade, SA 333 Gr1 or 6 , design code, design temperature more comprehensive answers could be provided. Thanks 88,Garth Trails Crescent Hamilton,Ontario, L9B2X1,Canada Email-pgoswami@sympatico.ca Email-pgoswami@quickclic.net
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandra, Vasanthan (Lagos)
Sent: Tuesday, January 26, 2010 5:19 AM
To: materials-welding@googlegroups.com
Subject: [MW:4151] RE: 4150] ASME SEC IX...PWHT? Nandesh, PWHT requirement is to be cross referred in line with Construction/Design code. In your mail, the applicable design code is missing. However, assuming the design code as B31.3 (2008) for piping, PWHT is mandatory for a thickness >20mm.
From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Nandesh Kumar
Sent: 26 January 2010 10:33
To: materials-welding@googlegroups.com
Subject: [MW:4150] ASME SEC IX...PWHT? For our LNG piping project, as per ASME SEC IX for a pipe 16 inch OD and Thk 21.44 mm PWHT is manadtory? We are welding root and hot pass TIG and others SMAW. |
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