Purging Gas for Fillet Weld

[yoga nandhan]

Can anyone please clarify,  for Fillet weld to be carried out in a S.S Pipe (4.5mm wall thickness) to support joint with GTAW Process. Is it required to give Purging Gas in pipe.  (as per Clause 7.5 of API582. (attached)).

 

Pipe Material: SA312 TP316/316L

Support Material: SA240TP316/316L

 

Thickness: 4.5 mm Max.

 

Thanks in advance.

Best Regards,

Yoganandhan Palaniappan

 

[manpreet]

Dear Yoga,

for GTAW welds, an internal 100% argon shall be used for the root pass and second layer (i.e. Hot Pass) of Stainless Steel Welds.

Regards
Manpreet Singh



On Wed, 26 Jan 2011 21:29:54 +0530 yoga nandhan wrote
>

>

Can anyone please clarify,  for Fillet weld to be carried outin a S.S Pipe (4.5mm wall thickness) to support joint with GTAW Process. Is itrequired to give Purging Gas in pipe.  (as per Clause 7.5 of API582. (attached)).

 

Pipe Material: SA312 TP316/316L

Support Material: SA240TP316/316L

 

Thickness: 4.5 mm Max.

 

Thanks in advance.

>

Best Regards,

YoganandhanPalaniappan

 

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[Karthik]

No need if it is a support welded on the pipe.But if u welded like end plate (groove+fillet) need. Thanks & Regards, (Karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Wed, 1/26/11, yoga nandhan <yogan...@gmail.com> wrote:

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[Suresh]

Hi

 

I think NOT required for Fillet welds especially pipe to supports .

 

Suresh

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Thanks  & Best Regards,

Suresh

Mobile No: 91-92 92 905 905

[Elshan Feyzullayev]

This clause is only for full pen welds but not fillet welds.

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Date: Wed, 26 Jan 2011 15:16:24 +0400

Subject: [MW:9489] Purging Gas for Fillet Weld

From: yogan...@gmail.com
To: material...@googlegroups.com

[manish kulkarni]

Dear ,   You need to provide purging if thk. of SS pipe is less than 6 mm thk. Heat input during fillet welding of support to SS pipe thk.< 6 mm, produces heat tints on ID of pipe,which leads to service failures deoending upon corrosivity of carrying fluid.   You can think. of reducing cost of purging by different means . Above 6 mm SS pipe thk. it is not required.API 582 has got guidence notes.Pl refer.   Regards,   Manish Kulkarni --- On Thu, 27/1/11, Suresh <bobsu...@gmail.com> wrote:

[praveen alavandar]

Dear Yoga,   As per API RP 582 you'll need to purge when the process pipe wall thickness is 6.3mm and less.   As suggested by Manpreet, you can use Argon, or you can use purging gas as Nitrogen (Welding Grade) where you can have considerable cost saving if your purging volume is more.   Regards,   A.Praveen Welding Engineer Muscat --- On Thu, 1/27/11, manpreet <manpre...@rediffmail.com> wrote:

[ANDRE P]

Experience has shown that when the material is thin, especially in stainless steels, the temperature produces an internal oxidation, eg loss when welding on flanges slip on

Regards

Andre Marcel

---

From: elsh...@hotmail.com
To: material...@googlegroups.com
Subject: RE: [MW:9508] Purging Gas for Fillet Weld
Date: Thu, 27 Jan 2011 08:32:52 +0400