Materials & Welding: September 2018

Sunday, September 30, 2018

Re: [MW:28364] evaluating of micro structure

Replica will give macrostrure, not micro

Best Regards,
Shashank  C Vagal


                      On Sunday, 30 September, 2018, 12:30:08 PM IST, pradip kumar Sil <pradipsil@gmail.com> wrote:                  


Go for replica test

On Sun, 30 Sep 2018, 11:44 Ali Asghari, <asgharialigl@gmail.com> wrote:
Dear All.
Does anybody know how it is possible to evaluate the bainite or martensite of the base metal is tempered or not?
I want to know the method , frequency of testing, acceptance( such as figures) and any other issues that can say with confidently we have tempered micro structure or not?
as you know this is more crucial in sour service and is a requirement in our specification but doesn't mention detail of it.

Regards.

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[MW:28364] how to find exact travel speed of welder

What is the proper way to calculate a welder's travel speed?

please answer this question according to your experience.

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Re: [MW:28363] evaluating of micro structure

Go for replica test

On Sun, 30 Sep 2018, 11:44 Ali Asghari, <asgharialigl@gmail.com> wrote:

Dear All.

Does anybody know how it is possible to evaluate the bainite or martensite of the base metal is tempered or not?
I want to know the method , frequency of testing, acceptance( such as figures) and any other issues that can say with confidently we have tempered micro structure or not?
as you know this is more crucial in sour service and is a requirement in our specification but doesn't mention detail of it.

Regards.

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[MW:28362] evaluating of micro structure

Dear All.

Does anybody know how it is possible to evaluate the bainite or martensite of the base metal is tempered or not?

I want to know the method , frequency of testing, acceptance( such as figures) and any other issues that can say with confidently we have tempered micro structure or not?

as you know this is more crucial in sour service and is a requirement in our specification but doesn't mention detail of it.

Regards.

Friday, September 28, 2018

Re: [MW:28360] RE: 28355] Water Vapor in welded joints

Dear sir,

My work shop is in Kerala, India. The interesting thing is that the vapours are seen even in afternoon (Humidity may be >65%). After the weld got cooled, the surface of the joint is like somebody poured water on the joint. This is visible in SS only.This water vapours are not making any issue in Weld joint.

I will share the photos latter.

Is it related to heat conductivity of SS?

Is it related to flux as commented by a member of this group ? if so which component/metal contained in flux?

Thank you all for the replay.

Regards,

Hareesh K V

On Fri, Sep 28, 2018, 7:59 PM PGoswami <pgoswami@quickclic.net> wrote:

Hi,
This is a case of moisture condensation. It's possible if the relative humidity(RH) factor is high, typically above 60% or more. In Indian subcontinent after the Monsoon RH could be very high contributing to this. Where's the location of your plant? Do you have any humidity control in the shop floor?, it may help.
Stainless steel does not require any preheating however some preheating ( typically up to 30-40 DegC) is advisable to get rid of the moisture accumulation, typically happening due to condensation.

Thanks.

P.Goswami.P.Eng, IWE.
Welding & Metallurgical Specialist
Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hareesh K V
Sent: September 28, 2018 12:24 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: [MW:28355] Water Vapour in welded joints

Dear Veterans,

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints.

Regards,

Hareesh K V
+91-8547859202
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Re: [MW:28360] RE: 28355] Water Vapor in welded joints

I also experienced the same but my observation is perticularly in night shift where welders are not particular about removing and cleaning the slag from welded joint and remains till morning Such practices causing moisture accumulation in the visinity of such jt

Therefore We had made mandatory to clean the weld joint free of slag Which has given us good results

Regards

Hegde

Sent from Yahoo Mail on Android

On Fri, 28 Sep 2018 at 19:59, PGoswami
<pgoswami@quickclic.net> wrote:

Hi,
This is a case of moisture condensation. It's possible if the relative humidity(RH) factor is high, typically above 60% or more. In Indian subcontinent after the Monsoon RH could be very high contributing to this. Where's the location of your plant? Do you have any humidity control in the shop floor?, it may help.
Stainless steel does not require any preheating however some preheating ( typically up to 30-40 DegC) is advisable to get rid of the moisture accumulation, typically happening due to condensation.

Thanks.

P.Goswami.P.Eng, IWE.
Welding & Metallurgical Specialist
Email:pgoswami@quickclic.net,pradip.goswami@gmail.com

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hareesh K V
Sent: September 28, 2018 12:24 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: [MW:28355] Water Vapour in welded joints

Dear Veterans,

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints.

Regards,

Hareesh K V
+91-8547859202
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[MW:28359] RE: 28355] Water Vapor in welded joints

Hi,

This is a case of moisture condensation. It's possible if the relative humidity(RH) factor is high, typically above 60% or more. In Indian subcontinent after the Monsoon RH could be very high contributing to this. Where's the location of your plant? Do you have any humidity control in the shop floor?, it may help.

Stainless steel does not require any preheating however some preheating ( typically up to 30-40 DegC) is advisable to get rid of the moisture accumulation, typically happening due to condensation.

Thanks.

P.Goswami.P.Eng, IWE.

Welding & Metallurgical Specialist

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

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hareesh K V
Sent: September 28, 2018 12:24 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: [MW:28355] Water Vapour in welded joints

Dear Veterans,

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints.

Regards,

Hareesh K V

+91-8547859202

[MW:28356] Water Vapour in welded joints

Appreciate if you can share the picture

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Re: [MW:28356] Reg:SS to MS support welding

You can use MS cleats buttered with E 309 electrode for minimum of 3

layers. This helps to avoid contamination and carbon pick up on SS plate.

On MS plate, there will not be any issue.

C Sridhar

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

On Friday, 28 September, 2018, 9:54:48 AM IST, George Dilintas <dilintas@gmail.com> wrote:

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The contamination will not affect the test piece. However in production contamination has to be avoided

Στις Πέμ, 27 Σεπ 2018, 13:55 ο χρήστης Gopalakrishnan G <gopal2408@gmail.com> έγραψε:

Dear experts
I want to do PQR for ss304L to is2062.my doubt is what material to be used for support to avoid distortion ? whether SS or MS ?.if I use MS for support any contamination will reflect in test piece?.kindly guide me.

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Re: [MW:28356] Water Vapour in welded joints

Pl. check. There can not be water vapour after welding. You can see side wetting (on either end of bead toes) and it is normal in SS welding due to certain chemical used in flux coating. It gets dried on its own.

C Sridhar.

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

On Friday, 28 September, 2018, 11:18:32 AM IST, Hareesh K V <hareesh13h@gmail.com> wrote:

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Dear Veterans,

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints.

Regards,

Hareesh K V

+91-8547859202

I'm protected online with Avast Free Antivirus. Get it here — it's free forever.

[MW:28355] Water Vapour in welded joints

Dear Veterans,

After the cooling of weld joints, water vapor is seen in the surface of weld joints. What is the reason? This is particularly seen in SS welded joints.

Regards,

Hareesh K V

+91-8547859202

Re: [MW:28352] Re: Reg:SS to MS support welding

Sir

Thk u for ur reply.but how it affects the strength ?can u guide me plz.

On Thu, 27 Sep 2018, 6:35 pm sandeep kumar, <sandeepdhiman63@gmail.com> wrote:

Preferably use SS because of superior properties in terms of corrosion resistance & strength. I assume you are going to weld with 309L type consumables.

Otherwise use MS, weld with 309L, that what actually you are doing for the designed weld joint also.

Thanks & regards
Sandeep Kumar

On Thursday, September 27, 2018 at 1:55:59 PM UTC+3, Gopalakrishnan G wrote:
Dear experts
I want to do PQR for ss304L to is2062.my doubt is what material to be used for support to avoid distortion ? whether SS or MS ?.if I use MS for support any contamination will reflect in test piece?.kindly guide me.

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Thursday, September 27, 2018

Re: [MW:28352] PQR usage (SA 516 Gr. 70 to SA 36)

Yes you can

Στις Τετ, 26 Σεπ 2018, 13:05 ο χρήστης Raghuram Bathula <raghurambathula@gmail.com> έγραψε:

yes
On Wed, 26 Sep 2018 at 14:00, williams p wilson <williamswilsonp@gmail.com> wrote:
Dear All,

I Have a PQR for SA 516 Gr.70 (N) Plate with Charpy V-notch Test -20 degree C
Can we use this as a supportive PQR for SA 36 Welding Procedure Specification.
(No Impact Test)
Welding Position, Process , Consumables will be same.
No PWHT.

Thank You & Regards
Williams
Mechanical Engineer
P Please consider the environment before printing this message

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Re: [MW:28352] Reg:SS to MS support welding

The contamination will not affect the test piece. However in production contamination has to be avoided

Στις Πέμ, 27 Σεπ 2018, 13:55 ο χρήστης Gopalakrishnan G <gopal2408@gmail.com> έγραψε:

Dear experts
I want to do PQR for ss304L to is2062.my doubt is what material to be used for support to avoid distortion ? whether SS or MS ?.if I use MS for support any contamination will reflect in test piece?.kindly guide me.

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[MW:28351] Re: Reg:SS to MS support welding

Preferably use SS because of superior properties in terms of corrosion resistance & strength. I assume you are going to weld with 309L type consumables.

Otherwise use MS, weld with 309L, that what actually you are doing for the designed weld joint also.

Thanks & regards

Sandeep Kumar

On Thursday, September 27, 2018 at 1:55:59 PM UTC+3, Gopalakrishnan G wrote:

Dear experts
I want to do PQR for ss304L to is2062.my doubt is what material to be used for support to avoid distortion ? whether SS or MS ?.if I use MS for support any contamination will reflect in test piece?.kindly guide me.

[MW:28350] Re qualification as per AWS D1.1

Dear All,

I have to re-qualify the welders as per AWS D1.1 but I have some
quires. Please help me to resolve the same.

1) What should be the test piece thickness for re qualification ? Our
previous thickness was 25 mm. ( As AWS shows option of 10 mm thk test
plate which will qualify any production welding thickness )
2) Do I need to go for mechanical testing or only radiography is sufficient?
3) What will be the qualification range after successful qualification?

Regards,
Somnath Ashtakar
8668674172

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[MW:28349] Reg:SS to MS support welding

Dear experts

I want to do PQR for ss304L to is2062.my doubt is what material to be used for support to avoid distortion ? whether SS or MS ?.if I use MS for support any contamination will reflect in test piece?.kindly guide me.

Re: [MW:28348] testing of inaccessible welded joints

It is not possible since all of joints butied.

Does anybody know about high resolution MFL would be useful in evaluting of joint

Regards.

On Thu, Sep 27, 2018, 11:15 AM 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Try Crawler RT

Best Regards,

Shashank C Vagal (Quality Adviser), (+91) 8082395502, 8779046302,

NEO METAL-ANALYST & NDT SERVICES

· A-25, Geet Siddhi, Boradevadi, Moshi-Haveli, PCMC, Pune 412105

· 301, PRATHAMESH, M G Rd – Mahant Rd, Vile Parle East, Mumbai 400 057 INDIA

www.neometalanalystndt.com / enquiry@neometalanalystndt.com / nach_sam@yahoo.com

On Thursday, 27 September, 2018, 12:30:25 PM IST, Ali Asghari <asgharialigl@gmail.com> wrote:

Do you have any file for presenting this method?
I said in previous emails, pressure testing may not detect some rejected defects that don,t cause leak.
Regards.

On Thu, Sep 27, 2018, 5:45 AM pradip kumar Sil <pradipsil@gmail.com> wrote:
Borodcope you can identify internal defect. otherwise pressure test

On Mon, 24 Sep 2018, 13:01 Ali Asghari, <asgharialigl@gmail.com> wrote:
Thank you for responding but our line is long& we want to know about internal defects and visual in that situation doesn't have good sensitivity.
Actually, I am wondering about mechanised ultrasonic that syncronised with crawler.
If you know any equipment or company that have simillar technology.
Regards.

On Mon, Sep 24, 2018, 8:37 AM sandeep kumar <sandeepdhiman63@gmail.com> wrote:
for smaller length, a surface inspection with boroscope can be possibly made. Now a days boroscope with robot manipulator (pipe crawler) also available which can be remotely controlled although a costly matter.

https://www.ryonic.io/products/pipeline-inspection-crawlers/
The above system can be used upto 500 mm however diameter restriction is applicable.

http://aitproducts.com/borescope-pipe-camera-rentals/pipe-camera-rental/pipeline-inspection-camera.html

Shared more details about the joint types, pipe dia length etc would be better for the understanding.

Thanks & regards
Sandeep Kumar

On Sunday, September 23, 2018 at 3:17:28 PM UTC+3, Ali Asghari wrote:
Dear Kumar.
this line is piggable but I don't think the pig with considering pf it's velocity don't have ability to scan welds?if you know information or experience, please let me know.
pressure testing can only detect defects that cause leak or rupture, and other rejected defects can be undetected.

Regards.

On Sun, Sep 23, 2018 at 1:32 PM Lakshmankumar Bayyana <lakshma...@gmail.com> wrote:
If it is a pipe line, best option is to do hydro test with 1.25 times of the working pressure to ensure the integrity
Also can go with ultrasonic pig in case of pig possible lines

Thanks and Regards
Lakshman kumar. B
+91 9440031459

Sent from my iPhone

On 23-Sep-2018, at 11:28 AM, Ali Asghari <asghar...@gmail.com> wrote:

Dear All.

Does anybody know there is NDT method that can inspected welded joints which are buried and not accessible?our concern is about finding of construction defects either surface and internal that have a good detect ability for linear ones particularly Transverse Crack.

Regards.

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Re: [MW:28347] testing of inaccessible welded joints

Try Crawler RT

Best Regards,
Shashank  C Vagal (Quality  Adviser), (+91) 8082395502, 8779046302,
NEO METAL-ANALYST & NDT SERVICES 
·        A-25, Geet Siddhi, Boradevadi, Moshi-Haveli, PCMC,  Pune 412105
·       301, PRATHAMESH, M G Rd – Mahant Rd, Vile Parle  East, Mumbai 400 057 INDIA
www.neometalanalystndt.com / enquiry@neometalanalystndt.com / nach_sam@yahoo.com



                      On Thursday, 27 September, 2018, 12:30:25 PM IST, Ali Asghari <asgharialigl@gmail.com> wrote:                  


Do you have any file for presenting this method?I said in previous emails, pressure testing may not detect some rejected defects that don,t cause leak.
Regards.

On Thu, Sep 27, 2018, 5:45 AM pradip kumar Sil <pradipsil@gmail.com> wrote:
Borodcope you can identify internal defect. otherwise pressure test

On Mon, 24 Sep 2018, 13:01 Ali Asghari, <asgharialigl@gmail.com> wrote:
Thank you for responding but our line is long& we want to know about internal defects and visual in that situation doesn't have good sensitivity.Actually, I am wondering about mechanised ultrasonic that syncronised with crawler.
If you know any equipment or company that have simillar technology.
Regards.

On Mon, Sep 24, 2018, 8:37 AM sandeep kumar <sandeepdhiman63@gmail.com> wrote:
for smaller length, a surface inspection with boroscope can be possibly made. Now a days boroscope with robot manipulator (pipe crawler) also available which can be remotely controlled although a costly matter.
https://www.ryonic.io/products/pipeline-inspection-crawlers/
The above system can be used upto 500 mm however diameter restriction is applicable.

http://aitproducts.com/borescope-pipe-camera-rentals/pipe-camera-rental/pipeline-inspection-camera.html

Shared more details about the joint types, pipe dia length etc would be better for the understanding.

Thanks & regards
Sandeep Kumar

On Sunday, September 23, 2018 at 3:17:28 PM UTC+3, Ali Asghari wrote:Dear Kumar.this line is piggable but I don't think the pig with considering pf it's velocity don't have ability to scan welds?if you know information or experience, please let me know.
pressure testing can only detect defects that cause leak or rupture, and other rejected defects can be undetected.

Regards.

On Sun, Sep 23, 2018 at 1:32 PM Lakshmankumar Bayyana <lakshma...@gmail.com> wrote:
If it is a pipe line, best option is to do hydro test with 1.25 times of the working pressure to ensure the integrity Also can go with ultrasonic pig in case of pig possible lines

Thanks and Regards Lakshman kumar. B 
+91 9440031459

Sent from my iPhone

On 23-Sep-2018, at 11:28 AM, Ali Asghari <asghar...@gmail.com> wrote:

Dear All.
Does anybody know there is NDT method that can inspected welded joints which are buried and not accessible?our concern is about finding of construction defects either surface and internal that have a good detect ability for linear ones particularly Transverse Crack.

Regards.
 

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Re: [MW:28346] testing of inaccessible welded joints

Do you have any file for presenting this method?

I said in previous emails, pressure testing may not detect some rejected defects that don,t cause leak.

Regards.

On Thu, Sep 27, 2018, 5:45 AM pradip kumar Sil <pradipsil@gmail.com> wrote:

Borodcope you can identify internal defect. otherwise pressure test

On Mon, 24 Sep 2018, 13:01 Ali Asghari, <asgharialigl@gmail.com> wrote:
Thank you for responding but our line is long& we want to know about internal defects and visual in that situation doesn't have good sensitivity.
Actually, I am wondering about mechanised ultrasonic that syncronised with crawler.
If you know any equipment or company that have simillar technology.
Regards.

On Mon, Sep 24, 2018, 8:37 AM sandeep kumar <sandeepdhiman63@gmail.com> wrote:
for smaller length, a surface inspection with boroscope can be possibly made. Now a days boroscope with robot manipulator (pipe crawler) also available which can be remotely controlled although a costly matter.

https://www.ryonic.io/products/pipeline-inspection-crawlers/
The above system can be used upto 500 mm however diameter restriction is applicable.

http://aitproducts.com/borescope-pipe-camera-rentals/pipe-camera-rental/pipeline-inspection-camera.html

Shared more details about the joint types, pipe dia length etc would be better for the understanding.

Thanks & regards
Sandeep Kumar

On Sunday, September 23, 2018 at 3:17:28 PM UTC+3, Ali Asghari wrote:
Dear Kumar.
this line is piggable but I don't think the pig with considering pf it's velocity don't have ability to scan welds?if you know information or experience, please let me know.
pressure testing can only detect defects that cause leak or rupture, and other rejected defects can be undetected.

Regards.

On Sun, Sep 23, 2018 at 1:32 PM Lakshmankumar Bayyana <lakshma...@gmail.com> wrote:
If it is a pipe line, best option is to do hydro test with 1.25 times of the working pressure to ensure the integrity
Also can go with ultrasonic pig in case of pig possible lines

Thanks and Regards
Lakshman kumar. B
+91 9440031459

Sent from my iPhone

On 23-Sep-2018, at 11:28 AM, Ali Asghari <asghar...@gmail.com> wrote:

Dear All.

Does anybody know there is NDT method that can inspected welded joints which are buried and not accessible?our concern is about finding of construction defects either surface and internal that have a good detect ability for linear ones particularly Transverse Crack.

Regards.

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