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Re: [MW:25403] RE: 25392] PWHT

By Materials & Welding
Hi everyone,

As per Aramco specifications such as W-011 and W-012, only hardness is mandatory for sour services,  normally on sampling basis ( 10%). Regarding PWHT, it is either required based on construction code or some specific services such as caustic or amines which are clearly stated in both the aramco standards, not for all sour services.

Regards
Ahmed 


On Thu, 15 Sep, 2016 at 9:28 am, 水海岩
<zhy370137@gmail.com> wrote:
Dear pgoswami:

Thank you for your reply!

PIPELINE design code is B-31.4/31.8 , Aramco specifications is SAES-W-012 and design office  is SNC- lavalin
the pipeline is LSPB contract and  in bidding phase, but design discription about PHWT just  is acoording to standard and spc  .
But we just find  hardness control for sour services in the above document (girth weld and HAZ hardness is more than 250 HV10)
According to my experiences, girth weld and HAZ hardness of X60 mterial is lower than 250 HV10 without PWHT.(EVEN like this ,in other country iraq or iran ,we need apply PWHT for girth weld because feed design requirment)
So pls help us confirm whether girth weld and HAZ Apply PWHT or just control hardness,because it is the first bid  in the saudi aramco.

thank you 

CNPC daqing saudi 

QAQC

 

 

From: materials-welding@ googlegroups.com [mailto:materials-welding@ googlegroups.com] On Behalf Of zhy370137@gmail.com
Sent: Wednesday, September 14, 2016 10:59 AM
To: Materials & Welding
Subject: [MW:25392] PWHT

 

Dear sir

good day 

pls hlep us confirm whether we need apply PWHT for every girth weld according to your experience.

pipe ：API 5 L X60 HIC resistant pipe

welding method: CRC automatic

pipeline diameter and thickness:20inch 0.4inch(10MM)

medium：sour condensate 

pressure:960psi

pipeline distance：164km between two gas plant in saudi （safaniya plant to berris gas plant)

client：saudi aramco

 

CNPC daqing saudi 

QAQC

 

 

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