Re: [MW:23913] Bulge P-91 Pipe after PWHT

Mr shanmugan,

Job is kept in vertical condition where and when the job is heated locally the material softens  at that particular area where all the weight of the job is acted on that softened area which leads to bulging locally

Preferred to do PWHT HORIZONTALLY

On 24 Nov 2015 14:46, "shanmuganathan .subbiah" <shanmuganathan.subbiah@gmail.com> wrote:

Dear 

Both end closed or not during PWHT?

On Tue, Nov 24, 2015 at 12:26 PM, pradip kumar Sil <pradipsil@gmail.com> wrote:

Dear Expert,

In P91 Material ( HRSG header Joint ) after pwht one joint is bulge.We did  Preheating ,Welding , Post Heating,& PWHT in proper way.

Can anybody explain why this bulge occurs & remedy.

During fit-up inspection & weld visual inspection all round the joint is perfect but after PWHT pipe is bulge 140 mm away from the   weld ment

Pic Attached

Regards,

Pradip

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Regards

SHANMUGANATHAN SUBBIAH

AIB- Vincotte International & Partners LLC

PO.Box-420, PC -116

MAF, Sultanate of Oman

Tel: +968 24565771

Fax: +968 24565772

Mob: +968 92096714

Web:www.vincotte.com

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