Dear Abdul Rahman, Please see below clause from note 5 of UCS 56 for P.No.1 materials. for corrosion resistant weld metal overlay cladding or for welds attaching corrosion resistant applied lining (see UCL-34) provided preheat to a minimum temperature of 200°F (95°C) is maintained during application of the first layer when the thickness of the pressure part exceeds 1 1⁄4 in. (32 mm). You'll definetely have to post weld heat treat the 60mm thick CS weldment, but can avoid CRO getting post weld heat treated using the above clause, if you want to utilize the above clause you'll have to first weld the CS part, do the PWHT and then deposit your CRO with the minimum specified preheat as above. Regards, Praveen
--- On Wed, 1/5/11, manpreet <manpreetsin88@rediffmail.com> wrote:
From: manpreet <manpreetsin88@rediffmail.com>
Subject: Re: [MW:0] PWHT Requirement For CRO
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Wednesday, January 5, 2011, 5:07 PM
Dear Rahman, Quote- "if preheat (95 deg c) is there PWHT is not mandatory for thickness greater than 33mm" what i can read from your below mentioned Que is that Base material thickness is 60 mm, how can you get exemption? Regards Manpreet Singh On Wed, 05 Jan 2011 16:57:08 +0530 rinshad abdul rahman wrote > Dear sir, > >Thanks for your replay > >But what about the notes in UCS-56 2 (c) 5 >that is if preheat (95 deg c) is there PWHT is not mandatory for thickness greater than 33mm > > On Wed, Jan 5, 2011 at 1:04 PM, Karthik <karthik6684@yahoo.com> wrote: > Hi,
>Yes.You should do PWHT of SA516 with CRO as per ASME Sec,VIII,DIV 1,UCL34.Please find below the extraction.
>UCL 34
>(a) Vessels or parts of vessels constructed of base material
with corrosion resistant integral or weld metal overlay
cladding or applied corrosion resistant lining material shall
be postweld heat treated when the base material is required
to be postweld heat treated. In applying these rules, the
determining thickness shall be the thickness of the base
material.
>When the thickness of the base material requires postweld
heat treatment, it shall be performed after the application
of corrosion resistant weld metal overlay cladding or
applied corrosion resistant lining unless exempted by the
Notes of Table UCS-56.
>(b) Vessels or parts of vessels constructed of chromium
>stainless steel integral or weld metal overlay cladding and
>those lined with chromium stainless steel applied linings
>shall be postweld heat treated in all thicknesses, except
>vessels that are integrally clad or lined with Type 405 or
>Type 410S and welded with an austenitic electrode or nonair-
>hardening nickel–chromium–iron electrode need not be
>postweld heat treated unless required by (a) above.
>
> Thanks & Regards,
>
>
(Karthik)
>
>
Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282
>
>--- On Wed, 1/5/11, rinshad abdul rahman <rinshad043@gmail.com> wrote:
>
>From: rinshad abdul rahman <rinshad043@gmail.com>
>Subject: [MW:9091] PWHT Requirement For CRO
>To: materials-welding@googlegroups.com
>Date: Wednesday, January 5, 2011, 3:49 PM
>
> Dear all,
>
> I just want to know that whether PWHT is required for CRO on SA516 Gr. 70 (60 mm thick) on the same part we need do SMAW+SAW weld with 60 mm nominal size (construction is as per ASME BPV SEC VIII DIV 1)
>
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> > -- >To post to this group, send email to materials-welding@googlegroups.com >To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com >For more options, visit this group's bolg at http://materials-welding.blogspot.com/>The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. >  -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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