Re: [MW:32767] PWHT and Hydrotest

Hi,

As per Table UCS56-1- Note (b) of Section VIII,Div.1 , for 32mm to 38mm thickness PWHT is not mandatory as below. But hydrostatic test to be done as per the drawing & Design requirements.

GENERAL NOTES:

(a) When it is impractical to postweld heat treat at the temperature specified in this Table, it is permissible to carry out the postweld

heat treatment at lower temperatures for longer periods of time in accordance with Table UCS-56.1.

(b) Postweld heat treatment is mandatory under the following conditions:

(1) for welded joints over 11/2 in. (38 mm) nominal thickness;

(2) for welded joints over 11/4 in. (32 mm) nominal thickness through 11/2 in. (38 mm) nominal thickness unless preheat is

applied at a minimum temperature of 200°F (95°C) during welding. This preheat need not be applied to SA-841 Grades A and

B, provided that the carbon content and carbon equivalent (CE) for the plate material, by heat analysis, do not exceed 0.14%

and 0.40%, respectively, where

Thanks& Regards,

(Karthik)
Karthikeyan.S
M: +66-892512282

On Wednesday, January 19, 2022, 03:05:37 PM GMT+7, Shahil Saini <sainishahil98@gmail.com> wrote:

Hello everyone,

If 4-5 mm welding is performed in the 32 mm thick material, is PWHT & Hydro required or not or can I skip PWHT and Hydro? any clause related to this??

Regards,

Shahil Saini

PGET-Welding

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