Re: [MW:23337] Pre-heat & pre heat maintenance

Dear Sir,

             Is it OK to preheat the pipe using cooper heating method for high thickness (say >25mm) carbon steel/ alloy steel pipes, like SA335 P22? Root and hot pass will be performed by GTAW & subsequent passes by SAW or FCAW. Is there any restriction in using this type of heating in power piping, where the heating equipment is stationary and the pipe is rotating which might affect the uniform heating?

Regards

Rejoy Thomas

Piping/Welding QC & Expeditor

STF SpA

On 20 August 2015 at 14:43, pgoswami <pgoswami@quickclic.net> wrote:

ASME B-31.1, specifies that uniform ,preheat, post heating(when specified by design specifications) and PWHT (when specified by design code), needs to be done for power piping. Performing the above with resistance coils(local PWHT) are common practice for in situ fabricated piping.

 

Please look at AWS-D-10.10-2009, for  detailed guidance.

 

Thanks.

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Engineering Specialist

Hamilton, Ontario, Canada

pgoswami@quickclic.net

pradip.goswami@gmail.com

ca.LinkedIn.com/pub/pradip-goswami/5/985/299

 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com
Sent: Thursday, August 20, 2015 4:02 AM
To: pradip kumar Sil
Subject: Re: [MW:23317] Pre-heat & pre heat maintenance

The preheat method is not specified in the ASME Code. It is a matter of sound engineering practice

Sent from my BlackBerry 10 smartphone.

From: pradip kumar Sil Sent: Πέμπτη, 20 Αυγούστου 2015 - 10:29 To: materials-welding Reply To: materials-welding@googlegroups.com Subject: [MW:23316] Pre-heat & pre heat maintenance

 Dear All,

Is there any code requirement for  ASTM A335 Gr P-22 material before welding & pre heat maintenance by resistance coil ( For uniform pre-heating  pre heat maintenance ) for power piping

Regards

Pradip

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAB%3DAs8%3D9-XJZDRE%3DEbGUK20dAiDuz5igd5j9mg%3Dkgnoj1wCEyw%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

This message contains confidential information. To know more, please click on the following link: http://disclaimer.bureauveritas.com

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/20150820080155.6459476.92630.12530%40gr.bureauveritas.com.
For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/DCF733A2C42F4C7B9F8BD186CE9CB14B%40homepg.

For more options, visit https://groups.google.com/d/optout.

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CALLc27_SiSMKdFLH71wx0Jq0sT9inr%3DHUdGZqUbPR3bCFgsWSQ%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.