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 38mmTHANKS & 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 & QUALITYMobile 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 ReyesJ.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
J.R. Machine Company, Inc.
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