Straight Face Requirement in Dished End..Reg.,

[kcrtechnical]

Dear Friends,

 

Is there any specific requirement specified any PV Codes regarding requirement of Straight Face in Dished Ends.

 

Best regards

K C R

[Shashank Vagal]

Will you please be more specific? This is an interesting question.A sketch will be of great help. --- On Thu, 5/1/12, kcrtechnical <kcrtec...@gmail.com> wrote:

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[GOPU NAIR]

Dear KCR

 Kindly refer to ASME Sec. VIII Div 1 2010, fig: UW 13.1 (l) and note under the same which reads "When thick is equal to.........."  also look at 2 of page no. 122.  Strictly speaking SF is not required when the thickness of shell and dished end are equal and the joints are made by butt welds. When there is a difference in thickness the 1:3 transition that needs to be made shall  be within the SF.

However, as a good engineering practice the butt weld shall be avoided in the knuckle area.

Gopal

---

From: kcrtechnical <kcrtec...@gmail.com>
To: material...@googlegroups.com
Sent: Thursday, 5 January 2012 2:08 PM

Subject: [MW:13413] Straight Face Requirement in Dished End..Reg.,

[Karthik]

Hi,

The straight Face on the dished head is important to weld the Dished head to the Vessel/Shell. As you know, all welds joints surface and face to be flat and smooth for welding. 

 

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

---

From: Shashank Vagal <nach...@yahoo.com>
To: material...@googlegroups.com
Sent: Thursday, January 5, 2012 10:21 PM
Subject: Re: [MW:13420] Straight Face Requirement in Dished End..Reg.,

[RAJASEKARAN]

UG 32 (ASME Sec VIII – Div 1)

 

(l) All formed heads, thicker than the shell and concave to pressure, intended for butt welded attachment, shall have a skirt length sufficient to meet the requirements of Fig. UW-13.1, when a tapered transition is required. All formed heads concave to pressure and intended for butt welded attachment need not have an integral skirt when the thickness of the head is equal to or less than the thickness of the shell. When a skirt is provided, its thickness shall be at least that required for a seamless shell of the same inside diameter.

 

Rgds

Raj

[vijayan]

Hi

 

There is some specific requirements for Straight Flange in formed dish heads with respect to the

 

-       Thickness difference between shell and dish head (Thickness diff by more than 3mm or 1/4^th of thinner whichever is less, requires 1:3 transition, Ref UW-9 (c) and UW-13(b)(2)).

-       Type of attachment(Fig UW 13.1)

-       Side to pressure (UG-32 and UG-33)

 

Refer the following clauses UG-32 (l),(m), (n) and UG-33(i), and UW-13 for further details.

BR

M.Vijayan

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of kcrtechnical
Sent: Thursday, January 05, 2012 11:38 AM
To: material...@googlegroups.com
Subject: [MW:13413] Straight Face Requirement in Dished End..Reg.,

 

Dear Friends,

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[Desai Jignesh (Mumbai - Piping)]

Can somebody write me about the possibility of either radiography OR Ultrasonic testing of attached butt weld?

 

We have tried to carry out radiography with and without non metallic support as in the attached snaps but image is not clear.

 

Regds/Jignesh

[Madhusudan Rout]

Dear Jignesh,

                 I face same problem my previous project,

               We have done both NDE. RT & UT.

[vijayan]

Hi

 

What is the joint configuration

BR

M.Vijayan

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[balaganapathy lingam r]

Dear Sir,

             Both are possible but we have to slightly bend the film(cassette) to get a clear image(i.e) :- the cassette must be very closely packed with the joint. I think this will be giving you a good result. 

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R.Balaganapathylingam

 

QC - Lead Engineer,

FLSmidth.

[balaganapathy lingam r]

Dear Sir,

            As per your first photo only UT is possible since space constraint for the film.

[Desai Jignesh (Mumbai - Piping)]

It is a butt weld.

 

It is welding of SS 321 forged component (Nozzle) of bevel end with 90 el. Actually forged nozzle is without tapering.

Proper radiography is executed for the BW valves joints as shown in Photo-0060.

 

UT is also a problem since probe movement is possible at only one side (Towards elbow) and there is no inside access.

 

It is 100% Radiography lines with high pressure – 1500#.

 

Regds/Jignesh

[george....@gr.bureauveritas.com]

I would not suggest to bend the film cassette. UT using angle and straight probes is more appropriate. However I am surprised that there is no a tapered transition as required by most of the codes in case of unequal thickness
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

---

  From: "Desai Jignesh (Mumbai - Piping)" [J.J....@ticb.com]
  Sent: 10/01/2012 15:27 ZE5B
  To: "material...@googlegroups.com" <material...@googlegroups.com>
  Subject: [MW:13441] NDE FOR BUTT WELD

Can somebody write me about the possibility of either radiography OR Ultrasonic testing of attached butt weld?

 

We have tried to carry out radiography with and without non metallic support as in the attached snaps but image is not clear.

 

Regds/Jignesh

[Leo Sudarmadji]

Jignesh,

 

I prefer RT for that butt. Of course radiographs will not clear enough to interpret due to weld position.

Be sure no hanger mark to darkroom technician due to welding on the edge of radiographs.

 

If you changed with UT you have to get same material of block calibration with that butt. And need some TQ due to limited access for UT scanning area.

 

Regards,

Leo Sudarmadji

From: Desai Jignesh (Mumbai - Piping) <J.J....@ticb.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Tuesday, January 10, 2012 2:57 PM
Subject: [MW:13441] NDE FOR BUTT WELD

[Dinesh Ravi Shankar]

 Use D4 film & Density difference will come more, but you have to interpret carefully.

 

Thank you & Best Regards,

S. Dinesh Ravi Shankar.
Mechanical Inspector,
Saudi Aramco Project Inspection Division (SAPID),
Manifa Core Hydrocarbon Facilities Project.

Kingdom of Saudi Arabia.,

Mobile : +966 562944695,
Tel      : +966 3 379 2018.

 

  

From: Desai Jignesh (Mumbai - Piping) <J.J....@ticb.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Tuesday, January 10, 2012 12:57 PM
Subject: [MW:13441] NDE FOR BUTT WELD

[george....@gr.bureauveritas.com]

Since it is a austenitic SS UT may not be possible. It is not possible to form a tapered transition 1:3 as required by almost all ASME code sections, which would make RT easier?

Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

  From: "Desai Jignesh (Mumbai - Piping)" [J.J....@ticb.com]
  Sent: 10/01/2012 18:06 ZE5B
  To: "material...@googlegroups.com" <material...@googlegroups.com>

  Subject: RE: [MW:13448] RE: 13441] NDE FOR BUTT WELD

It is a butt weld.

 

It is welding of SS 321 forged component (Nozzle) of bevel end with 90 el. Actually forged nozzle is without tapering.

Proper radiography is executed for the BW valves joints as shown in Photo-0060.

 

UT is also a problem since probe movement is possible at only one side (Towards elbow) and there is no inside access.

 

It is 100% Radiography lines with high pressure – 1500#.

 

Regds/Jignesh

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of vijayan
Sent: 10 January 2012 16:18
To: material...@googlegroups.com
Subject: [MW:13444] RE: 13441] NDE FOR BUTT WELD

 

Hi

 

What is the joint configuration

BR

M.Vijayan

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Desai Jignesh (Mumbai - Piping)
Sent: Tuesday, January 10, 2012 12:58 PM
To: material...@googlegroups.com
Subject: [MW:13441] NDE FOR BUTT WELD

 

Can somebody write me about the possibility of either radiography OR Ultrasonic testing of attached butt weld?

 

We have tried to carry out radiography with and without non metallic support as in the attached snaps but image is not clear.

 

Regds/Jignesh

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

 

This communication and any files transmitted with it are confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient or the person responsible for delivering it to the intended recipient(s), please note that any form of distribution, copying or use of this communication or information contained in it is strictly prohibited and may be unlawful. If you have received this communication in error please return it to the sender, and delete the material from any computer. We reserve the right to monitor email communications through normal internal and external networks. We believe but not warrant that the email and the attachments are virus free. The statement and opinions expressed in this communication are those of the writer and do not necessarily represent those of Madina Group, whose registered office address is

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[vijayan]

Hi

 

Can you try as per the attached sketch.

 

Keep hole type IQI. Don’t bend the film cassette. Go for touching shot. I think you will get good result.

Pls update once done!

[Jean Staton]

I agree not to bend the film cassette but what about cutting the cassette to fit inside and placing IQI across the weld? Alsom you can “blow” the weld onto the film but need to realize this will give you a distortion of the weld.

 

Jean Staton

Corporate RSO/Quality, Safety, Environmental Manager

 

METCO - Materials Evaluation & Technology Corporation

27 Sawyer St, Beaumont, TX 77702

Phone: (409) 835-2600

Fax:  (409) 835-1199

Cell:  (409) 553-9460

Email: jean....@metco-ndt.com

Website:  www.metco-ndt.com

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[Ing. Manuel Haces Valdez]

Use small cassette to fit the weld and not bend the film also use UT straigth and angle beam to cover the entire volume of weld. Regards

Fuera de oficina. Out of office

---

From: george....@gr.bureauveritas.com

Sender: material...@googlegroups.com

Date: Tue, 10 Jan 2012 13:46:24 +0100

To: materials-welding<material...@googlegroups.com>

ReplyTo: material...@googlegroups.com

Subject: Re: [MW:13449] NDE FOR BUTT WELD

[venu moturu]

You can perform  PT for surface and RT & UT for subsurface .......

 

RT by placing the cut film on to the available area ( chances of missing HAZ region on one side)

UT by using Longitudinal Shear wave probes and normal probes ( weld shall be flush ground to ensure full coverage ) for subsurface and below surface

PT for surface

 

 

Best  Regards

Venu Moturu

 

From: "george....@gr.bureauveritas.com" <george....@gr.bureauveritas.com>
To: materials-welding <material...@googlegroups.com>
Sent: Wednesday, 11 January 2012, 19:25
Subject: Re: [MW:13454] RE: 13441] NDE FOR BUTT WELD

Since it is a austenitic SS UT may not be possible. It is not possible to form a tapered transition 1:3 as required by almost all ASME code sections, which would make RT easier?
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

This communication and any files transmitted with it are confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient or the person responsible for delivering it to the intended recipient(s), please note that any form of distribution, copying or use of this communication or information contained in it is strictly prohibited and may be unlawful. If you have received this communication in error please return it to the sender, and delete the material from any computer. We reserve the right to monitor email communications through normal internal and external networks. We believe but not warrant that the email and the attachments are virus free. The statement and opinions expressed in this communication are those of the writer and do not necessarily represent those of Madina Group, whose registered office address is

P.O. Box 20459, Doha, Qatar.
Tel. +974 44600818
Fax. +974 44603143

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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NOTICE: This message contains information which is confidential and the copyright of our company or a third party. If you are not the intended recipient of this message please delete it and destroy all copies. If you
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Nota : Ce message contient des informations confidentielles propriété de notre société et/ou d'un tiers. Si vous n’êtes pas parmi les destinataires désignés de ce message, merci de l'effacer ainsi que toutes ses copies. Si vous êtes parmi les destinataires désignés de ce message, prière de ne pas le divulguer ni de le transmettre à des tiers sans l’accord de notre société. Notre société ne peut garantir que l’intégrité de ce message a été préservée ni que la présente communication est sans virus, interception ou interférence. La responsabilité de notre société est limitée par nos Conditions Générales de Services.
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