Materials & Welding: March 2009

Tuesday, March 31, 2009

[MW:1852] Re: Hi Presuure Vessel Testing Facility- India

Dear Mr. Soman,

These products are to be tested for ~ 36000 PSI( is 2500 Bar).

We as a design service provider to many global and domestic enginnering houses has to provide information where these parts can get tested for approval.

Kindly let me have the information on where they can be tested and validated.

With kind regards,

A. Kiran Babu

# +91 09342410446

On Mon, Mar 30, 2009 at 9:06 AM, <donboscomarine@vsnl.net> wrote:

Dear Mr. Kiran Babu,

The Pressure Vessels are to be tested to 31 KSI or 36 PSI ? And do you require a NABL Certified Laboratory. Please let us know.

Best Regards,

G. A. Soman
PRINCIPAL

----- Original Message -----
From: KIRAN BABU AKSHINTHALA <kiranbabua@gmail.com>
Date: Sunday, March 29, 2009 9:53 am
Subject: [MW:1830] Hi Presuure Vessel Testing Facility- India
To: materials-welding@googlegroups.com

> Hi Team,
>
> We are looking for contact details of Lab Facilities who can test

> thesepressure vessels to 36 KSI.
>
> With kind regards,
>
> A. Kiran Babu
> Magna Design Technologies
> #93424 10446
>
> >
>

DON BOSCO MARITIME ACADEMY
Premier Automobiles Road,
Kurla West, Mumbai 400070
Tel: (022) 2504 1585 / 2018; 25036344. Fax: (022) 2504 0682
Email: donboscomarine@vsnl.net
Website: www.dbma.in

Contact: +91 26764690.
Cell: +91 9342410446

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By BR - March 31, 2009 No comments:
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[MW:1851] Re: 1841] Re: 1838] Fabricated Stiffeners

If that is the case than why ASME permit a staggered weld between shell to stiffeners weld? As per my opinion we can do staggered weld for stiffeners fabrication b'cas same redial pressure load + Redial shear load (please refer UG-30(e))acting on stiffener weld.

Regards,

Devang Patel
Manager Engineering

INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com

----- Original Message -----

From: Yagnesh Desai

To: materials-welding@googlegroups.com

Sent: Tuesday, March 31, 2009 9:42 AM

Subject: [MW:1850] Re: 1841] Re: 1838] Fabricated Stiffeners

Its so because the design is guided by buckling and not induced stress.

"Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>

"Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>
Sent by: materials-welding@googlegroups.com
03/30/2009 11:58 AM

Please respond to
materials-welding@googlegroups.com

To

<materials-welding@googlegroups.com>

cc

Subject

[MW:1843] RE: 1841] Re: 1838] Fabricated Stiffeners

Devang, As per ASME it is no where specified for external pressure design to use the staggered intermittent weld to fabricate the stiffeners. Hence, in my opinion it should not be used. You have to meet the required moment of inertia for the provided section. It is advisable to fabricate the stiffener with continuous welding only. Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel Sent: March 30, 2009 1:48 PM To: materials-welding@googlegroups.com Subject: [MW:1841] Re: 1838] Fabricated Stiffeners Thanks, Somesh, Yes, you are write but my question is can we do staggered intermittent weld to fabricate the stiffeners? ASME Sec. VIII Div-1 told about the stiffeners to shell welding only. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com ----- Original Message ----- From: "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com> To: <materials-welding@googlegroups.com> Sent: Monday, March 30, 2009 10:45 AM Subject: [MW:1840] RE: 1838] Fabricated Stiffeners Dear Devang, Fabricated stiffeners can be used in external pressure design of shell of pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig. UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on the acceptable method of attaching stiffener rings Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel Sent: March 30, 2009 12:24 PM To: materials-welding@googlegroups.com Subject: [MW:1838] Fabricated Stiffeners can we use fabricated stiffeners in external pressure design of shell of pressure vessel? If, yes than please tell, can we use staggered intermittent weld to fabricate T or Angle? Please reply. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.
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[MW:1850] Re: 1841] Re: 1838] Fabricated Stiffeners

Its so because the design is guided by buckling and not induced stress.

"Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>

"Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>

Sent by: materials-welding@googlegroups.com

03/30/2009 11:58 AM

Please respond to
materials-welding@googlegroups.com

To	<materials-welding@googlegroups.com>
cc
Subject	[MW:1843] RE: 1841] Re: 1838] Fabricated Stiffeners

Devang, As per ASME it is no where specified for external pressure design to use the staggered intermittent weld to fabricate the stiffeners. Hence, in my opinion it should not be used. You have to meet the required moment of inertia for the provided section. It is advisable to fabricate the stiffener with continuous welding only. Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel Sent: March 30, 2009 1:48 PM To: materials-welding@googlegroups.com Subject: [MW:1841] Re: 1838] Fabricated Stiffeners Thanks, Somesh, Yes, you are write but my question is can we do staggered intermittent weld to fabricate the stiffeners? ASME Sec. VIII Div-1 told about the stiffeners to shell welding only. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com ----- Original Message ----- From: "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com> To: <materials-welding@googlegroups.com> Sent: Monday, March 30, 2009 10:45 AM Subject: [MW:1840] RE: 1838] Fabricated Stiffeners Dear Devang, Fabricated stiffeners can be used in external pressure design of shell of pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig. UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on the acceptable method of attaching stiffener rings Regards Somesh Kumar Pandey KBR Energy & Chemicals 79 Anson Road #20-01 Singapore 079906 Office: +65 6210 7459 Fax: +65 6210 7250 Email: Somesh.Kumar@kbr.com -----Original Message----- From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel Sent: March 30, 2009 12:24 PM To: materials-welding@googlegroups.com Subject: [MW:1838] Fabricated Stiffeners can we use fabricated stiffeners in external pressure design of shell of pressure vessel? If, yes than please tell, can we use staggered intermittent weld to fabricate T or Angle? Please reply. Regards, Devang Patel Manager Engineering INOX INDIA Ltd. Ph :+91-265-3056392-3056100 Fax :+91-265-2333398-2341449 email : devangp@inoxindia.com www.inoxindia.com This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.

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[MW:1849] Re: Query on SMAW electrode selection for API 5L X65

Dear all,

The root pass is grinded to te half (aprx) before make the hot pass. the efectiva area is fullfilled with hot+filler passes, then the final strenght of joint doesn't depend on root pass.

Regarding metallurgical issues I agree and give thanks to Mr. Babu for the explanation.

One more factor is the operative difficult of make the root pass with 7010 or 8010.

BR

Date: Mon, 30 Mar 2009 22:19:46 +0800
Subject: [MW:1847] Re: Query on SMAW electrode selection for API 5L X65
From: kbabupsg@gmail.com
To: materials-welding@googlegroups.com

Hi,

The strength of joint not purely depend on the root pass.

My explanation as follows,

1) Main problem starts at Root if you have the different metallurgical phases at the root, , say you have 50% ferrite and 50% pearlite, the properties of metallurgical phases are different. Obviously that would carry forward to mechanical properties too.

2) As we all ,know the corrosion starts, where ever you have two differrent phases or chemical composition ; So in order to avoid this variation , it is necessary to keep the dilution level to minimum in the root pass

3) It is well proved by the researchers that, dilution is more on the root pass.

4) The strength of weld, not purely depend on the Root passes.

Thanks & regards,

K.Babu

Singapore

On Sun, Mar 22, 2009 at 9:43 PM, ARI <ariv2k@gmail.com> wrote:

Hi,

Using E6010-G would keep the dilution level as minimum, but at the same time, it wouldn;t give the UTS equal to Parent metal UTS for API5L X65?

Regards,

Ari

On 3/21/09, babu k <kbabupsg@gmail.com> wrote:

Hi,

Put it in simple words, the use of E6010-G is to keep the dilution level to be minimum ;

Thanks & Regards,

K.Babu

Singapore

On Thu, Mar 19, 2009 at 6:15 PM, Ari <ariv2k@gmail.com> wrote:

Dear All,

Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are
used for Oil pipelines(Sour) containing parent material of API 5L X65.
Since these type of PQR/WPS are being approved by most of the
Company.

As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has
YS of 48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both
of these electrodes the weld metal strength would not exceed YS
60,000 psi.

How its acceptable to keep the low weld metal strength(<YS 60,000 Psi)
than the parent metal (= YS 65,000Psi).

Thy suppose to use E8010 for root and E8018 for hot/fill, for API 5L
X65 materials, which only would give the equivalent WM strength.

As we all know that overmatching weld metal strength causes gross
section yielding in the pipe, whereas Undermatching weld metal
strength will cause straining of the weld.

Your advise/suggession, based on experience is appreciated.

Regards,

Ari

<span

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Monday, March 30, 2009

[MW:1848] Re: Fabricated Stiffeners

You can use fabricated stiffener with if it is considered fabricated stiffener in Design Calculation. You can do the staggered intermittent welding on bottom side of the Stiffener.

Regards

B.K.Shah

On Mon, Mar 30, 2009 at 7:23 AM, Devang Patel <devangp@inoxindia.com> wrote:

can we use fabricated stiffeners in external pressure design of shell of
pressure vessel?

If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?

Please reply.

Regards,

Devang Patel
Manager Engineering

INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com

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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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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[MW:1847] Re: Query on SMAW electrode selection for API 5L X65

Hi,

The strength of joint not purely depend on the root pass.

My explanation as follows,

3) It is well proved by the researchers that, dilution is more on the root pass.

4) The strength of weld, not purely depend on the Root passes.

Thanks & regards,

K.Babu

Singapore

On Sun, Mar 22, 2009 at 9:43 PM, ARI <ariv2k@gmail.com> wrote:

Hi,

Using E6010-G would keep the dilution level as minimum, but at the same time, it wouldn;t give the UTS equal to Parent metal UTS for API5L X65?

Regards,

Ari

On 3/21/09, babu k <kbabupsg@gmail.com> wrote:

Hi,

Put it in simple words, the use of E6010-G is to keep the dilution level to be minimum ;

Thanks & Regards,

K.Babu

Singapore

On Thu, Mar 19, 2009 at 6:15 PM, Ari <ariv2k@gmail.com> wrote:

Dear All,

Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are
used for Oil pipelines(Sour) containing parent material of API 5L X65.
Since these type of PQR/WPS are being approved by most of the
Company.

As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has
YS of 48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both
of these electrodes the weld metal strength would not exceed YS
60,000 psi.

How its acceptable to keep the low weld metal strength(<YS 60,000 Psi)
than the parent metal (= YS 65,000Psi).

Thy suppose to use E8010 for root and E8018 for hot/fill, for API 5L
X65 materials, which only would give the equivalent WM strength.

As we all know that overmatching weld metal strength causes gross
section yielding in the pipe, whereas Undermatching weld metal
strength will cause straining of the weld.

Your advise/suggession, based on experience is appreciated.

Regards,

Ari

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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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By BR - March 30, 2009 No comments:
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[MW:1846] Re: 1838] Fabricated Stiffeners

Hi Devang,

I don't think you can.

In the fig UG-29.1 of ASME VIII-1, the term 'butt-welding' is used for stiffener to stiffener welding.

Also, UG-29 (e) states that

Any internal stays or supports used as stiffeners
of the shell shall bear against the shell of the vessel
through the medium of a substantially continuous ring.

The word 'substantially continuous ring' is important here.

Thanks

Johnson Madukayil
Mechanical Engineer
CCI Thermal Technologies Inc.
2721, Plymouth Drive
Oakville, ON L6H 5R5
Canada

On Mon, Mar 30, 2009 at 1:48 AM, Devang Patel <devangp@inoxindia.com> wrote:

Thanks, Somesh,

Yes, you are write but my question is can we do staggered intermittent weld
to fabricate the stiffeners?

ASME Sec. VIII Div-1 told about the stiffeners to shell welding only.

Regards,

Devang Patel
Manager Engineering

INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com

----- Original Message -----
From: "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>
To: <materials-welding@googlegroups.com>
Sent: Monday, March 30, 2009 10:45 AM
Subject: [MW:1840] RE: 1838] Fabricated Stiffeners

Dear Devang,

Fabricated stiffeners can be used in external pressure design of shell
of
pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig.
UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on
the acceptable method of attaching stiffener rings

Regards

Somesh Kumar Pandey
KBR Energy & Chemicals
79 Anson Road #20-01
Singapore 079906
Office: +65 6210 7459
Fax: +65 6210 7250
Email: Somesh.Kumar@kbr.com

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel
Sent: March 30, 2009 12:24 PM
To: materials-welding@googlegroups.com
Subject: [MW:1838] Fabricated Stiffeners

can we use fabricated stiffeners in external pressure design of shell of

pressure vessel?

If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?

Please reply.

Regards,

Devang Patel
Manager Engineering

INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com

This e-mail, including any attached files, may contain confidential and
privileged information for the sole use of the intended recipient. Any
review, use, distribution, or disclosure by others is strictly prohibited.
If you are not the intended recipient (or authorized to receive information
for the intended recipient), please contact the sender by reply e-mail and
delete all copies of this message.

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To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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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By BR - March 30, 2009 No comments:
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[MW:1845] Re: MWAP, Design Pressure, MDMT and Design Temperature

Designated temperature normally is the Design Temperature or Desired Temperature.
MAWP for practical purposes is synonymous with Design Pressure. But many a times MAWP>Design Pressure, especially when you use stronger or thicker than required material for fabricating the pressure vessel.
MDMT is the lowest design temperature that the metal can be exposed to and not rupture under pressure (MDMT is important in cryogenic applications and in very cold places)

On Mon, Mar 30, 2009 at 1:10 AM, Chandulal Vithlani <chandulal.vithlani@borouge.com> wrote:

As per API 510, MAWP is defined as "The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc.".

What is the designated temperature?

How does MWAP differ from Design Pressure?

Similarly, MDMT has been defined in API 510 as "The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b))."

What is the difference between MDMT and Design Temperature?

Regards

Chandulal S Vithlani

**********************************************************************
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By BR - March 30, 2009 No comments:
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[MW:1844] welding distortion

Hi all I have one problem, if anyone have a solution these plz. give. I want to weld a tobe of wall thk. 5 mm. I want to acheive a weld of 20 mm od pipe on its wall with a controlled distortion of 0.01 mm. Can anyone please tell m which welding process I adope to acheive this. Please tell.
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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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By BR - March 30, 2009 No comments:
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[MW:1843] RE: 1841] Re: 1838] Fabricated Stiffeners

Devang,
As per ASME it is no where specified for external pressure design to use
the staggered intermittent weld to fabricate the stiffeners. Hence, in
my opinion it should not be used. You have to meet the required moment
of inertia for the provided section. It is advisable to fabricate the
stiffener with continuous welding only.
Regards
Somesh Kumar Pandey
KBR Energy & Chemicals
79 Anson Road #20-01
Singapore 079906
Office: +65 6210 7459
Fax: +65 6210 7250
Email: Somesh.Kumar@kbr.com

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel
Sent: March 30, 2009 1:48 PM
To: materials-welding@googlegroups.com
Subject: [MW:1841] Re: 1838] Fabricated Stiffeners

Thanks, Somesh,
Yes, you are write but my question is can we do staggered intermittent
weld
to fabricate the stiffeners?
ASME Sec. VIII Div-1 told about the stiffeners to shell welding only.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com
----- Original Message -----
From: "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>
To: <materials-welding@googlegroups.com>
Sent: Monday, March 30, 2009 10:45 AM
Subject: [MW:1840] RE: 1838] Fabricated Stiffeners
Dear Devang,
Fabricated stiffeners can be used in external pressure design of shell
of
pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig.
UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on
the acceptable method of attaching stiffener rings
Regards
Somesh Kumar Pandey
KBR Energy & Chemicals
79 Anson Road #20-01
Singapore 079906
Office: +65 6210 7459
Fax: +65 6210 7250
Email: Somesh.Kumar@kbr.com
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel
Sent: March 30, 2009 12:24 PM
To: materials-welding@googlegroups.com
Subject: [MW:1838] Fabricated Stiffeners

can we use fabricated stiffeners in external pressure design of shell of
pressure vessel?
If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?
Please reply.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com
This e-mail, including any attached files, may contain confidential and
privileged information for the sole use of the intended recipient. Any
review, use, distribution, or disclosure by others is strictly
prohibited.
If you are not the intended recipient (or authorized to receive
information
for the intended recipient), please contact the sender by reply e-mail
and
delete all copies of this message.

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By BR - March 30, 2009 No comments:
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[MW:1842] RE: 1839] MWAP, Design Pressure, MDMT and Design Temperature

Maximum Allowable Working Pressure (MAWP): It is the maximum permissible pressure at the top of the vessel in its normal operating position at a specific temperature, usually the design temperature (this is what the designated temp you are asking)

When calculated, the MAWP should be stamped on the nameplate. The MAWP is the maximum pressure allowable in the “hot and corroded’ condition. It is the least of the values calculated for the MAWP of any of the essential parts of the vessel, and adjusted for any difference in static head that may exist between the part considered and the top of the vessel.

Design Pressure: The pressure used in the design of a vessel component for the most severe condition of coincident pressure and temperature expected in normal operation. For this condition, and test condition, the maximum difference in pressure between the inside and outside of a vessel, or between any two chambers of a combination unit, shall be considered. Any thickness required for static head or other loadings shall be additional to that required for the design pressure.

Design temp: Generally it is the temp that corresponds to deign pressure. Vessels are designed for both max and min design temperatures.

Design temperature for vessels under external pressure shall not exceed the maximum temperatures given on the external pressure charts.

The MDMT or Minimum design metal temperature is the lowest temp expected in service or the lowest allowable temp calculated for each individual part. (Search for MDMT in the group you will get past discussions on MDMT)

Just go thro the name plate or MDR of the vessel, you will get all these values

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Chandulal Vithlani
Sent: Monday, March 30, 2009 10:40 AM
To: materials-welding@googlegroups.com
Subject: [MW:1839] MWAP, Design Pressure, MDMT and Design Temperature

As per API 510, MAWP is defined as “The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc.”.

What is the designated temperature?

How does MWAP differ from Design Pressure?

Similarly, MDMT has been defined in API 510 as “The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)).”

What is the difference between MDMT and Design Temperature?

Regards

Chandulal S Vithlani

**********************************************************************

Borouge is a leading provider of value creating, innovative plastics solutions for customers in the Middle East, Asia-Pacific and Africa. Borouge employs unique Borstar® technology to produce differentiated products for high-value infrastructure applications, including water, gas and industrial pipe systems, power and communication cables, advanced packaging and automotive components. Borouge’s state-of-the-art petrochemical complex is located at Ruwais, Abu Dhabi in the United Arab Emirates.

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By BR - March 30, 2009 No comments:
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[MW:1841] Re: 1838] Fabricated Stiffeners

Thanks, Somesh,
Yes, you are write but my question is can we do staggered intermittent weld
to fabricate the stiffeners?
ASME Sec. VIII Div-1 told about the stiffeners to shell welding only.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com
----- Original Message -----
From: "Somesh Kumar Pandey" <Somesh.Kumar@kbr.com>
To: <materials-welding@googlegroups.com>
Sent: Monday, March 30, 2009 10:45 AM
Subject: [MW:1840] RE: 1838] Fabricated Stiffeners
Dear Devang,
Fabricated stiffeners can be used in external pressure design of shell
of
pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig.
UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on
the acceptable method of attaching stiffener rings
Regards
Somesh Kumar Pandey
KBR Energy & Chemicals
79 Anson Road #20-01
Singapore 079906
Office: +65 6210 7459
Fax: +65 6210 7250
Email: Somesh.Kumar@kbr.com
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel
Sent: March 30, 2009 12:24 PM
To: materials-welding@googlegroups.com
Subject: [MW:1838] Fabricated Stiffeners

can we use fabricated stiffeners in external pressure design of shell of
pressure vessel?
If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?
Please reply.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com
This e-mail, including any attached files, may contain confidential and
privileged information for the sole use of the intended recipient. Any
review, use, distribution, or disclosure by others is strictly prohibited.
If you are not the intended recipient (or authorized to receive information
for the intended recipient), please contact the sender by reply e-mail and
delete all copies of this message.

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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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By BR - March 30, 2009 No comments:
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[MW:1840] RE: 1838] Fabricated Stiffeners

Dear Devang,
Fabricated stiffeners can be used in external pressure design of shell
of
pressure vessel as per ASME Sec. VIII Div.1. You can refer UG -29 , Fig.
UG 29.1 , UG-30 & Fig. UG-30 of ASME Sec. VIII Div.1 for more details on
the acceptable method of attaching stiffener rings
Regards
Somesh Kumar Pandey
KBR Energy & Chemicals
79 Anson Road #20-01
Singapore 079906
Office: +65 6210 7459
Fax: +65 6210 7250
Email: Somesh.Kumar@kbr.com
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Devang Patel
Sent: March 30, 2009 12:24 PM
To: materials-welding@googlegroups.com
Subject: [MW:1838] Fabricated Stiffeners

can we use fabricated stiffeners in external pressure design of shell of
pressure vessel?
If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?
Please reply.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com
This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended recipient. Any review, use, distribution, or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive information for the intended recipient), please contact the sender by reply e-mail and delete all copies of this message.
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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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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By BR - March 30, 2009 No comments:
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[MW:1839] MWAP, Design Pressure, MDMT and Design Temperature

As per API 510, MAWP is defined as “The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc.”.

What is the designated temperature?

How does MWAP differ from Design Pressure?

Similarly, MDMT has been defined in API 510 as “The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)).”

What is the difference between MDMT and Design Temperature?

Regards

Chandulal S Vithlani

**********************************************************************
Borouge is a leading provider of value creating, innovative plastics solutions for customers in the Middle East, Asia-Pacific and Africa. Borouge employs unique Borstar® technology to produce differentiated products for high-value infrastructure applications, including water, gas and industrial pipe systems, power and communication cables, advanced packaging and automotive components. Borouge's state-of-the-art petrochemical complex is located at Ruwais, Abu Dhabi in the United Arab Emirates.
===================================================================================
CONFIDENTIALITY NOTICE
This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please delete the email and any attachment(s) and notify the sender.
This footnote also confirms that this email message has been scanned for the presence of computer viruses.
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By BR - March 30, 2009 No comments:
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[MW:1838] Fabricated Stiffeners

can we use fabricated stiffeners in external pressure design of shell of
pressure vessel?
If, yes than please tell, can we use staggered intermittent weld to
fabricate T or Angle?
Please reply.

Regards,

Devang Patel
Manager Engineering
INOX INDIA Ltd.
Ph :+91-265-3056392-3056100
Fax :+91-265-2333398-2341449
email : devangp@inoxindia.com
www.inoxindia.com

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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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By BR - March 30, 2009 No comments:
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[MW:1837] Re: Fabrication of eccentric reducer, ASME B 31.3

Hi,

Generally large size eccentric reducers had to be made from pipes containing seam (SAW STRT pipes) and/or plates. If the reducers are certified to material spec. SA234 WPBW then welds was 100% RT-ed, and additionaly if U has been specified then it was 100% UT-ed.

These fittings shall meet to dimensional standard ASME B 16.9.

Sometimes, based on the design requirement, MSS-SP-75 specification would be required, and fittings would need to be certified accordingly by the manufacturer.

Regards,

Ari

On 3/29/09, HAREESH K V <hareesh13h@gmail.com> wrote:

Dear Sir,

I need a help regarding the fabrication of Eccentric reducer. When we
made this with a seamed pipe, on of the cut of the reducer come along
with the seam of the pipe. Our client rejected this reducer due to
this reason.(reducer comes in process piing) What is the procedure we
have to do in this case(NDT methods, like that). Is there any clause
in ASME B 31.3 for this? Is there any clause in ASME Sec VII? Can the
cuts of the reducer be considered as a longitudinal joints?

Thanking You

Hareesh K V

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By BR - March 30, 2009 No comments:
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[MW:1836] Re: Hi Presuure Vessel Testing Facility- India

Dear Mr. Kiran Babu,
The Pressure Vessels are to be tested to 31 KSI or 36 PSI ? And do you require a NABL Certified Laboratory. Please let us know.
Best Regards,
G. A. Soman
PRINCIPAL

----- Original Message -----
From: KIRAN BABU AKSHINTHALA <kiranbabua@gmail.com>
Date: Sunday, March 29, 2009 9:53 am
Subject: [MW:1830] Hi Presuure Vessel Testing Facility- India
To: materials-welding@googlegroups.com
> Hi Team,
>
> We are looking for contact details of Lab Facilities who can test
> thesepressure vessels to 36 KSI.
>
> With kind regards,
>
> A. Kiran Babu
> Magna Design Technologies
> #93424 10446
>
> >
>
DON BOSCO MARITIME ACADEMY
Premier Automobiles Road,
Kurla West, Mumbai 400070
Tel: (022) 2504 1585 / 2018; 25036344. Fax: (022) 2504 0682
Email: donboscomarine@vsnl.net
Website: www.dbma.in
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By BR - March 30, 2009 No comments:
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[MW:1835] Re: Fabrication of eccentric reducer, ASME B 31.3

the best way is to manufacture a reducer is in 2 halves formed from plate. These 2 nos long seams will be acceptable.you need to develop the plate profiles. Talk to any manufacturer of heat exchangers who did kettle type ones, in case you need some guidelines for the above development..
Tagore

On Sun, Mar 29, 2009 at 11:18 AM, HAREESH K V <hareesh13h@gmail.com> wrote:

Dear Sir,

I need a help regarding the fabrication of Eccentric reducer. When we
made this with a seamed pipe, on of the cut of the reducer come along
with the seam of the pipe. Our client rejected this reducer due to
this reason.(reducer comes in process piing) What is the procedure we
have to do in this case(NDT methods, like that). Is there any clause
in ASME B 31.3 for this? Is there any clause in ASME Sec VII? Can the
cuts of the reducer be considered as a longitudinal joints?

Thanking You

Hareesh K V

--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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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By BR - March 30, 2009 No comments:
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Sunday, March 29, 2009

[MW:1832] Re: Hi Presuure Vessel Testing Facility- India

Use ENERPAC high pressure hand pump. It will be economical and very effective. You do not need to get it done in a lab.
http://www.hyjacks.net/ep_40,000%20psi%20Hand%20Pump.pdf

Johnson Madukayil
CCI Thermal Technologies Inc.
Canada

On Sat, Mar 28, 2009 at 3:59 AM, KIRAN BABU AKSHINTHALA <kiranbabua@gmail.com> wrote:

Hi Team,

We are looking for contact details of Lab Facilities who can test these pressure vessels to 36 KSI.

With kind regards,

A. Kiran Babu

Magna Design Technologies

#93424 10446

[MW:1833] Fabrication of eccentric reducer, ASME B 31.3

Dear Sir,

I need a help regarding the fabrication of Eccentric reducer. When we
made this with a seamed pipe, on of the cut of the reducer come along
with the seam of the pipe. Our client rejected this reducer due to
this reason.(reducer comes in process piing) What is the procedure we
have to do in this case(NDT methods, like that). Is there any clause
in ASME B 31.3 for this? Is there any clause in ASME Sec VII? Can the
cuts of the reducer be considered as a longitudinal joints?

Thanking You

Hareesh K V

[MW:1834] Re: Query on SMAW electrode selection for API 5L X65

i think ,this chose is best because the service condition induceed the H embrittlement or cold crack even after days or months.therefore for reducing the probability of this crack ,the total strength of weld metal must be less than base metal and strain occur in weld not base.

From: Ari <ariv2k@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Cc: pssadanandan@yahoo.com
Sent: Thursday, March 19, 2009 1:45:44 PM
Subject: [MW:1784] Query on SMAW electrode selection for API 5L X65

Dear All,

Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are
used for Oil pipelines(Sour) containing parent material of API 5L X65..
Since these type of PQR/WPS are being approved by most of the
Company.

As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has
YS of 48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both
of these electrodes the weld metal strength would not exceed YS
60,000 psi.

How its acceptable to keep the low weld metal strength(<YS 60,000 Psi)
than the parent metal (= YS 65,000Psi).

Thy suppose to use E8010 for root and E8018 for hot/fill, for API 5L
X65 materials, which only would give the equivalent WM strength.

As we all know that overmatching weld metal strength causes gross
section yielding in the pipe, whereas Undermatching weld metal
strength will cause straining of the weld.

Your advise/suggession, based on experience is appreciated.

Regards,

Ari

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Saturday, March 28, 2009

[MW:1828] painting before hydrotest

Respected All,

my question is can we do painting of welded joints of pipe before hydrotest? As per B31.3 2006 clause 345.3.1 we can do '' but'' our applicable code is B31.8, Can we do with the same?

Regards,

m javed

[MW:1829] Re: 1814] Re: RT of Duplex Stainless Steel

Dear All,

We also encountered the same problem in Duplex but we concluded that it is due high ferrite content in the weld during weld.We send the sample in the lab for analysis and we found that there is a variation in the ferrite content in the two area and due to which we could find the line only in that area.

regds

Nilesh

On Sat, Mar 28, 2009 at 8:51 AM, ARI <ariv2k@gmail.com> wrote:

Hi,

By using Type-I films, which has slow speed, very high contrast, & very fine grain, using films Kodak M, TMX, T, Agfa D2, D4, Fuji 50, you may try!!!

Regards,

Ari

On 3/27/09, ndion@acuren.com <ndion@acuren.com> wrote:

You should do UT to confirm the indication
Sent from my Verizon Wireless BlackBerry

From: ndion@Acuren.com
Date: Fri, 27 Mar 2009 10:57:22 +0000
To: <materials-welding@googlegroups.com>
Subject: [MW:1822] Re: 1814] Re: RT of Duplex Stainless Steel

There are only three things that will cause white indications, tungsten in the weld, contaminated flux or excessive filler material.
Sent from my Verizon Wireless BlackBerry

From: "Chaitanya Purohit"
Date: Fri, 27 Mar 2009 15:11:21 +0800
To: <materials-welding@googlegroups.com>
Subject: [MW:1820] RE: 1814] Re: RT of Duplex Stainless Steel

Dear (ndion),

Thickness : 20mm

Method : X- ray

Film : Class 2

Screen used : 0.125mm Pb

Regards.

C. K. Purohit

General Manager - QC

KNM Process Systems Sdn Bhd - Malaysia

HP No. : 6016-3376448

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ndion@Acuren.com
Sent: Friday, March 27, 2009 11:13 AM
To: materials-welding@googlegroups.com
Subject: [MW:1814] Re: RT of Duplex Stainless Steel

How thick is the duplex, what film are they using and what source

Sent from my Verizon Wireless BlackBerry

From: "Chaitanya Purohit"
Date: Fri, 27 Mar 2009 11:03:30 +0800
To: <materials-welding@googlegroups.com>
Subject: [MW:1813] RT of Duplex Stainless Steel

Dear All,

I am facing problem during NDT (RT) of Duplex St.Steel) . The RT film shows 4-5" long white indication in the weld area. We tried changing the screen but still the same things appear on the film.

The welds are welded with SAW process. Generally the porosities are expected if we use SAW welding for Duplex but this indications are strange for me. Does anybody have experienced the same ?

Regards.

C. K. Purohit

***DISCLAIMER NOTICE ***

"This email and any files transmitted with it is confidential and is intended only for the use of the recepient(s) named above. If you are not the intended recipient, any review, retransmission, dissemination, distribution, printing, copying or use the information contained in this message or any part thereof in other manner is strictly prohibited. If you receive this email in error, please notify the sender immediately by return email and delete the email and any of its attachments. Any personal views or opinions expressed by the sender shall be understood as neither given nor endorsed by KNM or any of the companies within the Group."

***DISCLAIMER NOTICE ***

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--
Nilesh Parsekar
Sr QC Co-ordinator
Exterran Belleli Energy
Fujairah - Sidem
Mobile - 0506561785

[MW:1830] Hi Presuure Vessel Testing Facility- India

Hi Team,

We are looking for contact details of Lab Facilities who can test these pressure vessels to 36 KSI.

With kind regards,

A. Kiran Babu

Magna Design Technologies

#93424 10446

[MW:1831] Re: 1812] Re: Pre heat requirement for split welding procedures from combined PQR.

Dear all,

Thanks for the good discussion we had in below mails from J and Sayee. I
would just like to add the following from my experience.

When we discuss the Code, we have to judiciously follow the
provisions/limitiations therein. The explanation by J is the most
appropriate so far as the ASME is concerned. In case, the lower preheat
temperature are required to be used, the new qualification may be executed.
That is the only way. This doesnot mean that if we do not follow, there
would be really some problem of the sort we discussed in below mail.

It is something like this. When you are going on a highway, you have to
follow the maximum speed limit specified for the same even though by
exceeding the limit. This may be due to a no. of reasons, as we all know.
Similarly, when we need to follow certain standard, specification, code,
etc. we may have to make the best use of the provisions for our situation
before qualification of procedures and use the worst situation in
qualification so that during actual production welding, there would be
minimum problems.

Best regards,

Prasad

"Sayee
Raghunathan"
<Sayee.Raghunatha To
n@twi.co.uk> <materials-welding@googlegroups.com
Sent by: >
materials-welding cc
@googlegroups.com
Subject
[MW:1819] RE: 1812] Re: Pre heat
27/03/09 11:01 AM requirement for split welding
procedures from combined PQR.

Please respond to
materials-welding
@googlegroups.com

On a code basis, the explanation given by others limiting the decrease of
preheat on WPS to 55Deg C below that of the PQR is correct, and I agree
that the preheat shall be the minimum interpass temperature recorded for
the FCAW process-55Deg C, purely from a perspective of
application/interpretation of ASME Section IX code requirements.

For a more comprehensive answer, the preheat is determined by the combined
thickness, the carbon equivalent of the material(s), the level of
diffusible hydrogen in the weld metal and the heat input or arc energy of
the process. These factors either affect the cooling rate(s) or the
hardenability of the material and the susceptibility to hydrogen induced
cracking. Higher the hardness in the HAZ and higher the diffusible hydrogen
content in the wm, greater is the susceptibility to cracking. The method of
calculating the preheat temperatures is explained very clearly in EN
1011-2, which can be downloaded from the BSI website.

Therefore in my personal opinion, I would be looking at which has the lower
susceptibility to cracking, the FCAW process with potentially high weld
metal hydrogen, 24Deg preheat or with 32Deg preheat and compare with the
TIG process with diffusible hydrogen levels <5ml/100gm weld metal, 24Deg
preheat and lower arc energy(?). In my personal opinion the change in
preheat temperature will hardly be critical for welding C-Mn steels with
less than 0.43CEQ (IIW) and thicknesses lower than typically 25mm. I
mention this thickness and CEQ limit because from the level of preheat
specified by you, I would assume this is the case.

Regards

Sayee

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of
pieper-qsi@kpnmail.nl
Sent: 26 March 2009 21:09
To: Materials & Welding
Subject: [MW:1812] Re: Pre heat requirement for split welding procedures
from combined PQR.

Dear J,

Your explanation is correct regarding the problem with hydrogen cracks but
you call them HIC cracks and in my opinion you only get typical HIC cracks
(better known as stepwise cracking) when a sensitive material is exposed to
a H2S containing gas. Cracks will start anywhere in the microstructure on
dislocations and/or MnS inclusions because of hydrogen collecting at such
location and building op internal pressure by which the crack will find his
way through the microstructure by following the path with the lowest
resistance.

The typical cracks due to Hydrogen during welding mostly called cold
cracking.

Hope this information is useful.

Best Regards,

Herman Pieper

On 26 mrt, 14:56, jhenn...@deltak.com wrote:
> Your AI is correct. You may not use the 24C preheat recorded for the
> SMAW process as a basis for FCAW. Each process is qualified
> independently as far as essential variables is concerned. QW-200.2(b)
> states, in part: "The completed PQR shall document all essential
> variables of QW-250 through QW-280 for each welding process used
> during the welding of the test coupon". QW-406.1 is an essential
> variable for the FCAW process and therefore the minimum temperature
> used during the welding of the FCAW pass(es) becomes the "preheat"
> value used for the WPS. Of course, the WPS may have a preheat 100F or
> 55C less than the lowest recorded temperature for the process per
> QW-406.1.
>
> Thickness of base metals, thickness of the deposited weld metal have
> no bearing on this - you have two welding processes and the essential
> variables shall be recorded for each seperate process and the WPS
> shall be based on those values.
>
> In your case, the WPS for the FCAW process (PQR minimum preheat
> recorded 87C) may have a minimum preheat of 32C.
>
> If you think about it this makes sense. Assume you were to use GTAW
> for the root pass and FCAW for the fill and the material was carbon
> steel with a carbon equivalent of, say, 0.55. This material would
> have some sensitivity to hydrogen induced cracking. GTAW has very low
> hydrogen potential, <H4, and would probably require no preheat above
> ambient in order to prevent HIC. However, standard FCAW with a
> hydrogen content of >H8 may require preheat to prevent HIC. Would you
> want to assign no preheat to a WPS of FCAW only?
>
> We will see what the other pundits have to say. Cheers.
>
> J
>
> On Mar 26, 5:49 am, Muhammed Ibrahim <ibrat...@gmail.com> wrote:
>
>
>
> > Hi friends,
>
> > I would like to clarify one important thing about preheat. My PQR is
> > qualified with SMAW+FCAW. When I start the welding I preheated to 24
> > degree C. After root and hot pass compleated with SMAW before
> > starting FCAW the plate temperature is 87 degreeC. If I split this
> > PQR to make a WPS only for FCAW, Is it required to preheat the plate
> > to 87 degree C or can I give 24 degree celcius as preheated in the
> > starting of PQR test coupon?. Your response will be highly appreciated.
>
> > The AI insisting to put preheat of 87 degree shall be considered
> > when we split the PQR for FCAW because when FCAW process starts the
> > temperature of the plate to be considered as the preheat temperature
(87 degreeC).
>
> > Thanks & Regards
> > Muhammed Ibrahim PK- Tekst uit oorspronkelijk bericht niet weergeven
> > -
>
> - Tekst uit oorspronkelijk bericht weergeven -

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Materials & Welding

Tuesday, March 31, 2009

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[MW:1851] Re: 1841] Re: 1838] Fabricated Stiffeners

[MW:1850] Re: 1841] Re: 1838] Fabricated Stiffeners

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Monday, March 30, 2009

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[MW:1847] Re: Query on SMAW electrode selection for API 5L X65

[MW:1846] Re: 1838] Fabricated Stiffeners

[MW:1845] Re: MWAP, Design Pressure, MDMT and Design Temperature

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[MW:1843] RE: 1841] Re: 1838] Fabricated Stiffeners

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[MW:1841] Re: 1838] Fabricated Stiffeners

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[MW:1839] MWAP, Design Pressure, MDMT and Design Temperature

[MW:1838] Fabricated Stiffeners

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[MW:1836] Re: Hi Presuure Vessel Testing Facility- India

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Sunday, March 29, 2009

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[MW:1833] Fabrication of eccentric reducer, ASME B 31.3

[MW:1834] Re: Query on SMAW electrode selection for API 5L X65

Saturday, March 28, 2009

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[MW:1830] Hi Presuure Vessel Testing Facility- India

[MW:1831] Re: 1812] Re: Pre heat requirement for split welding procedures from combined PQR.

[MW:35346] Cast-iron welding

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