Materials & Welding: April 2019

Tuesday, April 30, 2019

Re: [MW:29542] A 234WPB

Can use upto temp 425 0c.

Regards

Anand gupta

ThyssenKrupp

On Tue, 30 Apr 2019 at 17:05, krishna kamal nayan Pandey
<kkmech1987@gmail.com> wrote:

Gents,
Can anyone confirm the temperature range of A 234 WPB fittings.
I mean the temperature this grade fitting can resist?

Best Regards,

Krishna Kamal Nayan

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29540] Re: ASME Sec-IX ( QW-403.5) interpretation

Yes.It qualifies the listed all three base materials using same F.No.as used for qualification.

On Sun, Apr 28, 2019 at 6:51 PM Souravbohray <ermechsouravbohray@gmail.com> wrote:

1.p number is essential variable either impact required or not .
2.g number is essential impact required
3.f and a number is essential  either impact required or not
so we can only weld P-No. 1 Gr. No 2 to P-No.8 Gr.No.1
CORRECT ME IF I AM WRONG

On Monday, 24 August 2009 09:27:51 UTC+5:30, Kural wrote:
Interpretation: Answer is yes ( for all 3 combination of basemetals) as long as other essential and supplemtary essential are unchanged.

On Sun, Aug 23, 2009 at 9:48 PM, Sukamal Naskar <sukama...@gmail.com> wrote:

Dear All,

Good Morning !!!

I have a query on ASME SEC-IX ( 2007 ED, 08 ADD )

QW-403.5 (c ) , states that " ---------------   In addition, when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group Numbers to themselves as well as to each other using the variables qualified."

Query: If we qualify one PQR, with P-No. 1 Gr. No 2 to P-No.8 Gr.No.1 material using SMAW ( E 309MoL) process with impact testing on weld metal & both HAZ portion , does this PQR supports the following WPS combination of base metals , if all other welding variables are unchanged ?

(i)                  P-No. 1 Gr.No.2 to P-No. 1 Gr.No.2

(ii)                P-No. 1 Gr.No.2 to P-No. 8 Gr.No.1

(iii)               P-No. 8 Gr.No.1 to P-No. 8 Gr.No.1

Please give your comments,

Thanking you,
Regards,
--
Sukamal Naskar
Malaysia

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29539] A 234WPB

Gents,

Can anyone confirm the temperature range of A 234 WPB fittings.

I mean the temperature this grade fitting can resist?

Best Regards,

Krishna Kamal Nayan

Re: [MW:29538] X-ray of pipe girth weld

Yes you can take the X ray.

On Tue, 30 Apr 2019 at 10:33 AM, MADHUSOODHANAN NAIR .G <nairdan2@gmail.com> wrote:

definitely you can do which will not affect any image quality.
Regards
MS NAIR

On Tue, 30 Apr 2019, 10:13 am nabeel ahmed khan <khan.nabeelahmed@gmail.com wrote:
Can X-ray of pipe joint be taken after painting of weld?

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29537] X-ray of pipe girth weld

definitely you can do which will not affect any image quality.

Regards

MS NAIR

On Tue, 30 Apr 2019, 10:13 am nabeel ahmed khan <khan.nabeelahmed@gmail.com wrote:

Can X-ray of pipe joint be taken after painting of weld?

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29536] X-ray of pipe girth weld

Can X-ray of pipe joint be taken after painting of weld?

Monday, April 29, 2019

Re: [MW:29533]

When you are using SS sheets, you cannot expect to have zero gap between base and cladding...

With overlay welding, that is possible but with this method, no.

Regards

Ramin Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

PG-Dip. in Welding Engineering (IWE AT 0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

On Sun, Apr 28, 2019 at 6:48 AM 'Ali Bhatti' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear experts

We are preparing a tank for use of Caustic Soda (NaOh) with inside SS cladding for cladding we will use SS sheet after fabrication. Above I forwarded query of our client. Can u give ur suggestion against query. Main point is that how we can sure zero gap between MS & SS

By UT strainght beam method. To check lack of bonding between cs and ss
Sent from my iPhone

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29533] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

Can you share your WPS so that I can help you.

On Mon, 29 Apr, 2019, 12:47 PM , <srimasstech@gmail.com> wrote:

DEAR EXPERTS
WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH
CHENNAI

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29533] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

If you use Chromium carbide base welding consumable for Abrasion Resistance then crack is Natural, Deposit max 2 Layer ( 6 to 8 mm )

With Regards

Rahul J Rathod
Welding Technician
mob +91 9727076573
whats up +91 81155889118
Email : welder.tigarc6g@gmail.com
Rahul.rathod1787@yahoo.com

On Mon, 29 Apr 2019 at 19:04, RAHUL Rathod <welder.tigarc6g@gmail.com> wrote:

Dear Venkatesan

Can you tell me what is your work Application, as per my knowledge some welding consumables have a natural tendency to crack due to high hardness if the crack is transverse, then no problem & please tell me which welding consumable you use & how much hardness its give as welded?

With Regards

Rahul J Rathod
Welding Technician
mob +91 9727076573
whats up +91 81155889118
Email : welder.tigarc6g@gmail.com
Rahul.rathod1787@yahoo.com

On Mon, 29 Apr 2019 at 12:47, <srimasstech@gmail.com> wrote:
DEAR EXPERTS
WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH
CHENNAI

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29532] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

Dear Venkatesan

Can you tell me what is your work Application, as per my knowledge some welding consumables have a natural tendency to crack due to high hardness if the crack is transverse, then no problem & please tell me which welding consumable you use & how much hardness its give as welded?

With Regards

Rahul J Rathod
Welding Technician
mob +91 9727076573
whats up +91 81155889118
Email : welder.tigarc6g@gmail.com
Rahul.rathod1787@yahoo.com

On Mon, 29 Apr 2019 at 12:47, <srimasstech@gmail.com> wrote:

DEAR EXPERTS
WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S
M.VENKATESAN
SRIMASSTECH
CHENNAI

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29531] Impulse Tube and Pipe -SS 316

Hi,

What is the differenc between a SS Impulse tube and SS pipe .

We have used 1/2" inch Pipe instead of Impulse tube ,with the thickness satisfying the Pressure requirements.Does it will affect the operation of the lines since we had to bend these pipes as per the requirement.

As far as I know ,the material properties are same for both pipe & tube ,only thickness varies in tubes depends on the design requirements and for pipe we have to take the matching sizes with respective SCH from the standards.

Also is there any difference in manufacturing or in properties of Impulse tube from normal tubes , or it is the same tube but only called as impulse tube based on application.

[MW:29530] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

DEAR EXPERTS

WHILE HARDFACING DONE IN PTA WELDING OVER CN3MN MATERIAL WE FOUND SMALL (3-4 MM LENGTH) CRACKS IN EVERY WHERE.PLEASE GUIDE US WHAT ARE ALL THE PRECAUTIONS WE CAN MADE BEFORE WELDING ?

REGARD'S

M.VENKATESAN

SRIMASSTECH

CHENNAI

[MW:29528] RE: 29521] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

The PCC-2 charts list a value for stored energy. How to calculate that manually without software? I assume a simple methodology for inspectors or inspection engineers would be available.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Sunday, April 28, 2019

Re: [MW:29528] Re: ASME Sec-IX ( QW-403.5) interpretation

All the below combinations can be written as per the qualified pqr, if no change in F no.

Regards

Muneeb

On Sun, Apr 28, 2019, 8:21 PM Souravbohray <ermechsouravbohray@gmail.com wrote:

1.p number is essential variable either impact required or not .
2.g number is essential impact required
3.f and a number is essential  either impact required or not
so we can only weld P-No. 1 Gr. No 2 to P-No.8 Gr.No.1
CORRECT ME IF I AM WRONG

On Monday, 24 August 2009 09:27:51 UTC+5:30, Kural wrote:
Interpretation: Answer is yes ( for all 3 combination of basemetals) as long as other essential and supplemtary essential are unchanged.

On Sun, Aug 23, 2009 at 9:48 PM, Sukamal Naskar <sukama...@gmail.com> wrote:

Dear All,

Good Morning !!!

I have a query on ASME SEC-IX ( 2007 ED, 08 ADD )

QW-403.5 (c ) , states that " ---------------   In addition, when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group Numbers to themselves as well as to each other using the variables qualified."

Query: If we qualify one PQR, with P-No. 1 Gr. No 2 to P-No.8 Gr.No.1 material using SMAW ( E 309MoL) process with impact testing on weld metal & both HAZ portion , does this PQR supports the following WPS combination of base metals , if all other welding variables are unchanged ?

(i)                  P-No. 1 Gr.No.2 to P-No. 1 Gr.No.2

(ii)                P-No. 1 Gr.No.2 to P-No. 8 Gr.No.1

(iii)               P-No. 8 Gr.No.1 to P-No. 8 Gr.No.1

Please give your comments,

Thanking you,
Regards,
--
Sukamal Naskar
Malaysia

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29528] Re: ASME Sec-IX ( QW-403.5) interpretation

1.p number is essential variable either impact required or not .

2.g number is essential impact required

3.f and a number is essential either impact required or not

so we can only weld P-No. 1 Gr. No 2 to P-No.8 Gr.No.1

CORRECT ME IF I AM WRONG

On Monday, 24 August 2009 09:27:51 UTC+5:30, Kural wrote:

Interpretation: Answer is yes ( for all 3 combination of basemetals) as long as other essential and supplemtary essential are unchanged.

On Sun, Aug 23, 2009 at 9:48 PM, Sukamal Naskar <sukama...@gmail.com> wrote:

Dear All,

Good Morning !!!

I have a query on ASME SEC-IX ( 2007 ED, 08 ADD )

QW-403.5 (c ) , states that " ---------------   In addition, when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group Numbers to themselves as well as to each other using the variables qualified."

Query: If we qualify one PQR, with P-No. 1 Gr. No 2 to P-No.8 Gr.No.1 material using SMAW ( E 309MoL) process with impact testing on weld metal & both HAZ portion , does this PQR supports the following WPS combination of base metals , if all other welding variables are unchanged ?

(i)                  P-No. 1 Gr.No.2 to P-No. 1 Gr.No.2

(ii)                P-No. 1 Gr.No.2 to P-No. 8 Gr.No.1

(iii)               P-No. 8 Gr.No.1 to P-No. 8 Gr.No.1

Please give your comments,

Thanking you,
Regards,
--
Sukamal Naskar
Malaysia

Saturday, April 27, 2019

Re: [MW:29526] 40 mm root gap

Yes , I agree.

On Sat 27 Apr, 2019, 07:55 Muhammed Ibrahim PK, <ibratech@gmail.com> wrote:

Not a good engineering practice to have such a wide weld metal deposit. Weld metal never will substitute solid base metal. All weld shall be minimized. Otherwise you may have to make a mockup and perform a whole weld mechanical tests which required for base metal. That also required your client approval.

On Fri, Apr 12, 2019, 6:29 AM '憲正陳' via Materials & Welding <materials-welding@googlegroups.com wrote:

Dear .
Approval of the Engineer.

Giant-welding filler metal

在 2019年4月6日星期六下午8:26:27 [GMT+8]， Vinay Thattey<vinay.thattey@gmail.com> 寫道：

To my knowledge ,its a fault in weld design .

On Thu, Apr 4, 2019, 16:23 Arun Padman <arunpadman0105@gmail.com> wrote:
Dear All,

I have a situation in which I need to qualify a WPS with 40mm root gap and 10mm base metal,

But the client is not ready to allow us to conduct the PQR, he need a technical clarification before we conduct PQR,

Is it allowed to weld 40 mm root gap with backing plate as per AWS D1.1, please help me.

Regards,

Arun Padman Manayil
P Save a tree. Please don't print this e-mail unless you really need to

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29527]

Dear experts

We are preparing a tank for use of Caustic Soda (NaOh) with inside SS cladding for cladding we will use SS sheet after fabrication. Above I forwarded query of our client. Can u give ur suggestion against query. Main point is that how we can sure zero gap between MS & SS

By UT strainght beam method. To check lack of bonding between cs and ss
Sent from my iPhone

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

[MW:29525] RE: 29521] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Hi Vino,

I believe your query is on repair/alteration and rerating of an existing piping? If so follow the guidelines of API-570 as attached. Additionally follow the flow chart of ASME PCC-2 and the recommendations of article 5.1 of PCC-2 for more guidance. One should not repair/ alter and operate a 25+ year plant same as a new construction.

Following repair, one may perform pressure test at the MAWP, or rerate the piping or component and accordingly proceed for testing.

I would thing attached API 570 guidelines and guidelines of PCC-2 codes would be of help.

Thanks.

P.Goswami.P.Eng, IWE.

Independent Welding & Metallurgical Specialist

Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/

Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

Cell/Whasapp:1-905-9793232

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ViNo Varughese
Sent: April 27, 2019 4:33 AM
To: materials-welding@googlegroups.com
Subject: [MW:29521] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Dear All,

I have read recently an Oil & Gas Journal regarding the hydro test Vs holding time and looking for more insight from Experts from different industries. There are few questions which I would like to get more clarity on -

1. What should be the recommendation for pressure testing of existing piping line which is repaired due to leak? Whether we should follow the Construction code or should we limit just above the MAOP? Is there any criticality rating based on which we need to consider the pressure test value, eg: H2S service.

2. Many times our Operation colleague request to consider the closure weld principal where we can do additional NDT on the welded joints instead of pressure testing. I do understand that NDT cannot be replaced with pressure testing. However, there are good chance of having a defect opened up which is on the verge of failure when the line is tested at 1.5/1.3 times the design pressure. How to deal with such situations when Asset Plant has been in Operation since 25+ years?

3. There is reference in the same Oil & Gas Journal - " A study of the causes of failures of Defects that Have Survived a Prior Hydrostatic Test". Appreciate if someone holds a copy of this article and please share in forum.

4. I think there is no International code referring to holding time of pressure testing. Just would like to get a reconfirmation on this.

Hope to see view from Experts all around different industries. I am sure it's a very routine repair in almost all of the Plants/Company and will add value to each one of us.

Best Regards

Vino

Re: [MW:29524] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Min 10 mins as per code

On 27 Apr 2019 5:51 pm, "Johnson Madukayil" <jmadukayil@gmail.com> wrote:

Check ASME B31.1-137.4.5 and 137.5.5 as an example. The holding time is a minimum of 10 minutes.

On Sat, Apr 27, 2019 at 6:22 AM ViNo Varughese <vinopvarghese@gmail.com> wrote:

Dear All,

I have read recently an Oil & Gas Journal regarding the hydro test Vs holding time and looking for more insight from Experts from different industries. There are few questions which I would like to get more clarity on -
1. What should be the recommendation for pressure testing of existing piping line which is repaired due to leak? Whether we should follow the Construction code or should we limit just above the MAOP? Is there any criticality rating based on which we need to consider the pressure test value, eg: H2S service.

2. Many times our Operation colleague request to consider the closure weld principal where we can do additional NDT on the welded joints instead of pressure testing. I do understand that NDT cannot be replaced with pressure testing. However, there are good chance of having a defect opened up which is on the verge of failure when the line is tested at 1.5/1.3 times the design pressure. How to deal with such situations when Asset Plant has been in Operation since 25+ years?

3. There is reference in the same Oil & Gas Journal - " A study of the causes of failures of Defects that Have Survived a Prior Hydrostatic Test". Appreciate if someone holds a copy of this article and please share in forum.

4. I think there is no International code referring to holding time of pressure testing. Just would like to get a reconfirmation on this.

Hope to see view from Experts all around different industries. I am sure it's a very routine repair in almost all of the Plants/Company and will add value to each one of us.

Best Regards
Vino

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29523] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Check ASME B31.1-137.4.5 and 137.5.5 as an example. The holding time is a minimum of 10 minutes.

On Sat, Apr 27, 2019 at 6:22 AM ViNo Varughese <vinopvarghese@gmail.com> wrote:

Dear All,

I have read recently an Oil & Gas Journal regarding the hydro test Vs holding time and looking for more insight from Experts from different industries. There are few questions which I would like to get more clarity on -
1. What should be the recommendation for pressure testing of existing piping line which is repaired due to leak? Whether we should follow the Construction code or should we limit just above the MAOP? Is there any criticality rating based on which we need to consider the pressure test value, eg: H2S service.

2. Many times our Operation colleague request to consider the closure weld principal where we can do additional NDT on the welded joints instead of pressure testing. I do understand that NDT cannot be replaced with pressure testing. However, there are good chance of having a defect opened up which is on the verge of failure when the line is tested at 1.5/1.3 times the design pressure. How to deal with such situations when Asset Plant has been in Operation since 25+ years?

3. There is reference in the same Oil & Gas Journal - " A study of the causes of failures of Defects that Have Survived a Prior Hydrostatic Test". Appreciate if someone holds a copy of this article and please share in forum.

4. I think there is no International code referring to holding time of pressure testing. Just would like to get a reconfirmation on this.

Hope to see view from Experts all around different industries. I am sure it's a very routine repair in almost all of the Plants/Company and will add value to each one of us.

Best Regards
Vino

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Re: [MW:29521] SAES W-12 PARA 6.1.5 NEED A CLEAR EXPLANATION

Standard clearly says cellulosic electrode may be used up to x60. So you cannot weld x65 with cellulosic. But if satisfying the requirements through pqr , no problem to weld with it.

On Sun 21 Apr, 2019, 6:58 PM Kannayeram Gnanapandithan, <kgpandithan@gmail.com> wrote:

Cellulose has got 30 to 60 ppm of Hydrogen. It is better not to use in high strength steel and thickness

On Sun, 21 Apr 2019 5:44 pm Akhil, <AKHILSUNDAR.NBC@gmail.com> wrote:
Hii

IN SAES W 12 , PARA 6.1.5 It is mentioned that cellulosic electrode may be used for all passes of grith weld of grades upto and including x60 and wall thickness less than or equal to 25 mm. Is this a mandatory requirement for doing pqr IN aramco project, if i want to use cellulosic electrode in all passes(E-7010 P1 for root & E-8010 P1 for all other passes ) of grith weld of x65 pipe is it possible ?

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Materials & Welding

Tuesday, April 30, 2019

Re: [MW:29542] A 234WPB

Re: [MW:29540] Re: ASME Sec-IX ( QW-403.5) interpretation

[MW:29539] A 234WPB

Re: [MW:29538] X-ray of pipe girth weld

Re: [MW:29537] X-ray of pipe girth weld

[MW:29536] X-ray of pipe girth weld

Monday, April 29, 2019

Re: [MW:29533]

Re: [MW:29533] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

Re: [MW:29533] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

Re: [MW:29532] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

[MW:29531] Impulse Tube and Pipe -SS 316

[MW:29530] REG : HARDFACING(ST-6) PRECAUTIONS OVER Cn3Mn CASTINGS

[MW:29528] RE: 29521] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Sunday, April 28, 2019

Re: [MW:29528] Re: ASME Sec-IX ( QW-403.5) interpretation

[MW:29528] Re: ASME Sec-IX ( QW-403.5) interpretation

Saturday, April 27, 2019

Re: [MW:29526] 40 mm root gap

[MW:29527]

[MW:29525] RE: 29521] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Re: [MW:29524] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Re: [MW:29523] Query related to Pressure testing of Existing piping/equipment - Looking for a right recommendation based on International Standard/ Guidelines

Re: [MW:29521] SAES W-12 PARA 6.1.5 NEED A CLEAR EXPLANATION

[MW:35346] Cast-iron welding

Search This Blog

Wikipedia

Followers