Re: [MW:24286] Alloy Material P22, A335 (Cr2.25 and Mo 1)

Dear Bhatti,

Your actual answer is yes. You have to do PWHT as your WPS is qualifies with PWHT (essential variable). 

You have an option:

You can avoid PWHT.............if your construction code is ASME B 31.3.

1st you have to qualify an WPS without PWHT.

2nd: for production weld you have to do recommended preheat as per WPS.

And please make sure the piping service does not fall under the following services: (Check your Piping Material Specification)

a. NaOH

b. MEA

c. DGA

d. ADIP

e. Hydrogen

f. DEA

g. MDEA

h. Boiler Deaerator.

i. Sour

If your service falls under the above services you have to do PWHT for your cases.

Regards

On Sat, Feb 13, 2016 at 5:01 PM, 'nawab ali bhatti' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Sir

Thanks for reply

Shoe support material is P22 / A335 thickness 12 mm and WPS qualified with PWHT 

Best Regards

---

From: 'Biplab Pal' via Materials & Welding <materials-welding@googlegroups.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Saturday, February 13, 2016 1:47 PM
Subject: Re: [MW:24279] Alloy Material P22, A335 (Cr2.25 and Mo 1)

Dear Bhatti,

First you tell me what is the material you have selected to use as a support and what is the thickness for the support material.

If your WPS is qualified with PWHT you have to do the PWHT.

If PWHT is service requirement you have to do PWHT.

Other cases you have to follow construction code (unless otherwise specified in client std/specification).

Regards

On Thu, Feb 11, 2016 at 8:09 PM, 'nawab ali bhatti' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Experts

Please   share your best  experience  with reference of international codes

Pipe Material  P22, A335 (Cr2.25 and Mo 1), Shoe support to be welded direct with pressure parts.(Pipe material thickness 33 mm, Operating Temperature 500 Centigrade  and pressure 106 bar)

 

My question,   Is  PWHT require for shoe supports  Or Not???

                     Shoe support plate thickness is 12 mm and throat thickness is 8 mm, Preheating is perform as WPS.

NA Bhatti

00966 593530001

                     

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Thanks & Regards
Biplab Pal
Welding Inspector

E-mail:   biplab.mech@gmail.com
 
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Biplab Pal
Welding Inspector

E-mail:   biplab.mech@gmail.com
 
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