Wednesday, February 16, 2011

Re: [MW:9896] Groove design and bevel

Dear Ahmed,
 
On worst case , we can go for an Mock Up , to prove the joint design will serve for the intended purpose.
 
Since the statement per 31.3  "End preparation for groove welds specified in ASME B16.25, or any other which meets the WPS, is acceptable." allows to give your own spec,   we can go for an Mock up to prove the joint design.
 
Thanks & Regards,
 
K. Babu

----- Original Message -----
Sent: Tuesday, February 15, 2011 6:30 PM
Subject: Re: [MW:9890] Groove design and bevel

Dear Mr. Babu,
 
ASME B31.3, Para 328.4.2 again refers to ASME B16.25. Also in fig 328.4, bevel above 22mm thickness are shown as compound bevel. But this figure states as typical end preparation.
 
I guess that your and Mr Manpreet interpretation is correct. Recommended, but not mandatory.
 
Thanks and regards,
Ahmed Husain
Mob-0547170325



From: Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>
To: materials-welding@googlegroups.com
Sent: Tue, February 15, 2011 6:32:23 AM
Subject: Re: [MW:9884] Groove design and bevel

Dear Ahmed,
 
As per my understanding, B16.25 (As in the scope of 16.25) would applicable to fittings only not for the pipes.
 
It is common practice that, pipe to fitting joint consist of one side (Fitting) compound bevel and pipe side single Bevel
 
I agree with the Para3.1C, requires the compound bevel for the fittings not  on the pipe side.
 
Thanks & Regards,
 
K. Babu
----- Original Message -----
Sent: Monday, February 14, 2011 6:19 PM
Subject: Re: [MW:9874] Groove design and bevel


Dear Mr. Babu,
 
As per ASME B16.25, Para 3.1C, I think this requirement of compound bevel is mandatory.
 
Please let me know if my interpretation is correct or not ?
Regards,
 
Ahmed Husain
Mob-0547170325



From: Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>
To: materials-welding@googlegroups.com
Sent: Mon, February 14, 2011 11:47:11 AM
Subject: Re: [MW:9872] Groove design and bevel

Dear Ahmed,
 
Is the ASME 16.25 would cover bevel preparation for the pipe  or fittings ?
 
As per my understanding that, Fig 328.4.2  is the typical examples only. Not an mandatory.
 
Regards,
K.Babu
 
 
 
Thanks & Regards,
 
K. Babu
----- Original Message -----
Sent: Monday, February 14, 2011 4:24 PM
Subject: Re: [MW:9871] Groove design and bevel

Dear Bharat/Manpreet,
 
At our project, what ever fiiting and pipe were received, it have compound bevels, but bevel prepared at site are single bevel. So it is quite common to see joint fit-up where one component with compound bevel and joining component with single bevel.Is this a acceptable? Contractor says since groove design is non-essential variable in WPS, so such fit-up are acceptable.
 
My concern is that since compound bevel is mandatory as per ASME B16.25, Contracor should follow the requirement of this code.
What is your opinion in this regard.
 
Ahmed Husain
Mob-0547170325



From: BHARAT GOLE <bharatgole@hotmail.com>
To: Material Welding <materials-welding@googlegroups.com>
Sent: Mon, February 14, 2011 10:23:40 AM
Subject: RE: [MW:9867] Groove design and bevel

Dear Manpreet,
I would like to share my experience realted to same issue which is raised by Mr. Husain.
In our previous project we received fittings thickness greater than 22 mm with compound bevel .However pipes received with single bevel.Then contractor propose  to do compound bevel for pipes with additional work and of course with extra cost.
Construction code ASME 31.3 & approved WPS was without Impact, with PWHT as per ASME IX .
WPS/PQR was qualified by Ludwing (one of reputed TPI ) showing various combination of joint configurations.Based on that we told contractor to go ahead with welding as it is - i.e.one side compound bevel & other side single bevel
So there was big noise between contractor & us....contractor was not ready to weld joint like that
Please let me know then my interpretation was correct or not ?
Warm regards

Bharat







Date: Mon, 14 Feb 2011 06:28:05 +0000
To: materials-welding@googlegroups.com
Subject: Re: [MW:9866] Groove design and bevel
From: manpreetsin88@rediffmail.com

Dear Husain,

I guess your design code is ASME B31.3, ASME Sec ix do not go into process details (bevel preparation etc.)

With reference to the butt end preperation shown in Fig 328.4.2 , Manufacturer has provided pipes with compound bevel as required by code, now you need to confirm whether bevel preperation done at site is in accordance with Fig 328.4.2.

Regards
Manpreet Singh



On Sun, 13 Feb 2011 21:42:00 , Ahmed Husain <ahmraha@yahoo.com> wrote

 Dear All,

 

I have a query, kindly share your valuable knowledge on this subject.

 

1-As per ASME IX,  Table QW-253 and QW-256, groove design is non-essential variable for SMAW and GTAW welding.

2-As per ASME B31.3, Fig 328.4.2 and ASME B16.25 Fig 3 and 5 (also Para 3.1C), components having thickness above 22 mm shall have compound bevel.

 

I would like to know that if the requirements of ASME B31.3 and 16.25 as stated above are mandatory? Because as per SEC IX, it is non-essential variable.

What I have observed at site, all pipes and fitting above 22 mm thickness have compound bevel from manufacturer, but all bevel prepared at side are single bevel. Is this acceptable?

 


 
Ahmed Husain
Mob-0547170325


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