Re: [MW:28080] Preheat requirement as per AWSD1. 1

Dear Mr. Linoy,

From qualified WPS deceasing preheat temperature 15 deg. then required new qualification of WPS.

Refer Table No. 4.9 Base metal

 Metal thickness  up to 20mm, over 20-65, 38-65, over -65 & Pre Heating temp. 10deg, 50, 80, 110 degrees 

Thanks & Best regards ,

Siva Prasad B.V

(E&I, QA/QC- Surveyor, Offshore & Marine)

RINA  Services S.p.A.

Mob: +91- 8582808223, 9879113307,

B 607/608 ,Everest Chambers,

Marol Naka, Andheri-Kurla Road,
Andheri (E). Mumbai-400 059, India

Website & Email  : www.rina.org , sivaprasad.rina@gmail.com

On Fri, Jul 13, 2018 at 11:07 PM, Linoy Joseph <linoyjoseph@gmail.com> wrote:

Dear experts,
I have a prequalifed WPS for A36 material butt joint up to 32 mm thickness. Preheat mentioned there as 0deg.up to 20mm thickness and 20 to 32mm thickness is 20 deg.
But as per AWS D1.1 table 3.2, there is no preheat mentioned for base metal A36.

So what is the reference for 20 deg. Preheat for thickness 20 to 32 mm.
Please give your feedback.
Regards,
Linoy

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