Why you do not perform a calculation using as allowable stress the stress value at the PwhT temperature? Consider the Euler case which is closer to your configuration
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| From: pradip kumar Sil Sent: Τρίτη, 24 Νοεμβρίου 2015 - 12:42 To: materials-welding Reply To: materials-welding@googlegroups.com Subject: Re: [MW:23914] Bulge P-91 Pipe after PWHT |
It is not possible to do PWHT horizontally because spool piece is welded at location
On Tue, Nov 24, 2015 at 3:25 PM, VHEER RAJHU <rajuveera2011@gmail.com> wrote:
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
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAFz2VvSzYO2qNL6SWL4ww0jhoRZLxcr2GRp%2Bc9%3DfN9uuKiAUBg%40mail.gmail.com.On 24 Nov 2015 14:46, "shanmuganathan .subbiah" <shanmuganathan.subbiah@gmail.com> wrote:--DearBoth 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 mentPic AttachedRegards,Pradip
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