Re: [MW:31866] PWHT required after Preheat for CS or LTCS

 Based off the information that you have given, Post weld heat treatment is not mandatory if preheat of 200°F was applied to the welded joint, with the welded joint being greater than or equal to 1 inch in thickness. 

Cheers.....

On Thu, Dec 17, 2020 at 12:07 AM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

if code of construction is ASME sec1, it is required or if it is Sec8, preheat is enough upto 38mm

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Thu, Dec 17, 2020 at 10:33 AM furkan topaloğlu <topaloglufurkan8@gmail.com> wrote:

In order to reduce the risk of cold cracks due to thickness and stress, PWHT can be applied to provide slow cooling after welding.

Jamie Reyes <jamiejrmachineco@gmail.com>, 17 Ara 2020 Per, 06:55 tarihinde şunu yazdı:

What is the code of construction?

What is the type of service?

Is Lethal Services involved?

Need the above mentioned information.....

Regards,

Jamie Reyes

J.R. Machine Company, Inc.

On Wed, Dec 16, 2020 at 7:47 PM thanh tung Nguyen <tungexp.268@gmail.com> wrote:

Dear Experts,

Hope you all are well.

I have a question is about the weld of the base material of CS (or Low temp. CS) with wall thickness greater than 25mm, Do we still required PWHT if we applied a preheating process before, or PWHT is no longer mandatory?

And which reference can be found?

Thank you & best regards./.

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Regards / Saygılarımla

 

	Furkan TOPALOĞLU Metallurgy and Material & Welding Engineer Metalurji ve Malzeme & Kaynak Mühendisi
	Phone : +90 (539) 437 88 03 E-Mail : topaloglufurkan8@gmail.com

 

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Jamie Reyes

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