Re: [MW:32347] Sulfuric acid drum nozzle problem

Dear zohair,

Thank you for your help! We have decided to use SS316 steel instead of carbon steel. Problem is actually because of sulphuric acid corrosion.

Kind regards,

1 Nisan 2021 Perşembe tarihinde saat 09:51:58 UTC+3 itibarıyla Zohair.O şunları yazdı:

Hi everyone, 

Sulfuric acid is very tricky when we talk about corrosivity because it depends on many factors ( concentration, temperature, velocity ... etc). For the concentration of 98% generally, it's better to use the SS316 instead of carbon steel for pipes, and you may use the carbon steel tanks with SS clad or overlaid nozzles. 

I thank the problem is mainly related to material selection.    

you can consult the NACE Standard related to sulfuric acid storage tank inspection. 

Z.O

Le mercredi 31 mars 2021 à 04:14:02 UTC+1, chandrakant mohikar a écrit :

Nozzle failed means, what exactly happened.?  if no flow through nozzle means, it is choked. it should be dechoked and material like dirt etc to be removed, another reason may be there is some other corrosive material through reverse flow. you can conduct systematically risk / HAZOP study with guidewords. if you can isolate, drain 99% H2SO4, remove nozzle and perfoem QA / TIC (testing, inspection & certification). as per design & EPC requirements, considerations & criteria. 

chandrakant mohikar

Infra Academy.
https://tinyurl.com/InfraAcademy

8446079514

  

On Tue, 30 Mar 2021, 14:01 okay Tutar, <okay...@gmail.com> wrote:

Hello everyone, I hope you all have a nıce day.

We had a problem in sulfuric acid %99 conct. drum nozzle.

After 2 years of operation, suddenly our nozzle has been failured.

We checked api 571.Concentration of acid is ok, it is %99.Speed of acid is lower than critical level.

But, when we examine flange and piping of nozzle. There is general corrosion and thickness of weld neck is thinned . Our material is carbon steel. But, in pipe thickness is not thinned.

Do you have suggestion for reason of this problem ? What could it be ?

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Re: [MW:32346] test medium Temperature

Thanks & Regards

J.Gerald Jayakumar

On Thursday, 29 April, 2021, 05:05:29 pm IST, abdulkhadar musthafa <abdulrilvan@gmail.com> wrote:

Dear Experts ,

Is there is any minimum and maximum  temperature for  test medium in Pressure testing ???

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[MW:32345] test medium Temperature

Dear Experts ,

Is there is any minimum and maximum  temperature for  test medium in Pressure testing ???

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+91-9841879981 (India )

+965- 50399719 (Kuwait)
"The reward of deeds depends upon the intentions"

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Re: [MW:32344] Lower - % Ferrite in Super Duplex Stainless Steel

Dear Friend ,

try to replace E 2594 by E2595 .. it have W element which is promoting ferrite

Best Regards ,

ENG. Ahmed Osman

On Thursday, April 29, 2021, 11:50:38 a.m. GMT+3, Chintan <chintan51@gmail.com> wrote:

Dear Expert, 

After Filling & Capping of  Weld Metal, During % Ferrite check via Feritoscope  values are showing less than requirement, How ever all other test i.e. Hardness, PMI etc. are well accepted. 

Kindly advice on  possible root cause as well as tips to achieve high Ferrite 

Please find below details for your quick ref. 

 Material Grade - SDSS -UNS s32760

Joint type -Pipe - Butt weld - 18 mm thick 

Welding Process - GTAW + SMAW 

Welding Consumable - ER 2594 + E 2594-15

% Ferrite - GTAW ( Root ) - 35%, SMAW ( Capping) - 25 -28 %, Base metal - 35to 40%, HAZ - 32 to 35% 

% Ferrite - Spec Req - 30  to 70%

Inerpass mentained - 100°C for GTAW, 120°C for SMAW

Heat input - GTAW - 0.8 to 1 KJ/mm

SMAW - 1.2 KJ/mm

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[MW:32343] Lower - % Ferrite in Super Duplex Stainless Steel

Dear Expert, 

After Filling & Capping of  Weld Metal, During % Ferrite check via Feritoscope  values are showing less than requirement, How ever all other test i.e. Hardness, PMI etc. are well accepted. 

Kindly advice on  possible root cause as well as tips to achieve high Ferrite 

Please find below details for your quick ref. 

 Material Grade - SDSS -UNS s32760

Joint type -Pipe - Butt weld - 18 mm thick 

Welding Process - GTAW + SMAW 

Welding Consumable - ER 2594 + E 2594-15

% Ferrite - GTAW ( Root ) - 35%, SMAW ( Capping) - 25 -28 %, Base metal - 35to 40%, HAZ - 32 to 35% 

% Ferrite - Spec Req - 30  to 70%

Inerpass mentained - 100°C for GTAW, 120°C for SMAW

Heat input - GTAW - 0.8 to 1 KJ/mm

SMAW - 1.2 KJ/mm

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[MW:32341] CS pipeline hydro static test

Hi,

I would like to know the basis of deciding the hydro test calculation for strength test 1.5*DP and 1.1*DP for tightness test. And why normally for CS pipeline we are going with 24 hours tightness test.

Thanks and Regards,
Ayoub

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[MW:32337] AWS D1.1 vs AWS B2.1

Hi there,

Can I use AWS B2.1 for identifying the material grouping while preparing AWS D1.1 WPS?

AWS D1.1 got a material grouping  and AWS B2.1 also have material grouping,  could some one please confirm  AWS D1.1 and AWS B2.1 is same grouping ?

if your answer is YES

I went  through AWS D1.1: 2020 Table 5.3 (Table 5.3 - Approved Base Metals for Prequalified WPSs (see 5.3))   found out API 5L X52 is a Group II material

Then i went to AWS B2.1   Table C.1 -- List of Base Metal Specifications—Ferrous Alloys  :  found out API 5L X52 is a Group I material.

Much appreciated your kind help

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Re: [MW:32337] PMI for ASTM A105 Flanges

In case of MTC non Availability or traceability chemical, mechanical and heat treatment condition to be proved. 

All test required by A105 and some additional test for heat treatment condition to be carried out. 

On Thu, 22 Apr 2021, 09:12 Babur Khan, <mbabur.bwp@gmail.com> wrote:

Dear Experts,
One of our contractor purposed PMI for ASTM A105 Flanges due to lake of inspection documents.
As my understanding PMI is suitable for HSLAS,
SS and DSS. For carbon Steel we can check if there is something happened im change of welding consumables for welding.
Please share your experience.

Babur Khan Lashari

Sent from my iPhone

Muhammad Babur Khan
Sent from my iPhone

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Re: [MW:32337] PMI for ASTM A105 Flanges

Dear Khan ;

PMI can be opted but it's not an alternative to chemical testing .  Yor statement " For carbon Steel we can check if there is something happened im change of welding consumables for welding" is not clear ...Can you specify . Well .What about physical properties ?

On Thu, 22 Apr 2021 at 09:12, Babur Khan <mbabur.bwp@gmail.com> wrote:

Dear Experts,
One of our contractor purposed PMI for ASTM A105 Flanges due to lake of inspection documents.
As my understanding PMI is suitable for HSLAS,
SS and DSS. For carbon Steel we can check if there is something happened im change of welding consumables for welding.
Please share your experience.

Babur Khan Lashari

Sent from my iPhone

Muhammad Babur Khan
Sent from my iPhone

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Re: [MW:32337] Please do your homework before sending questions to the group

I think the message is loud and clear now and I hope group members will take it in the right direction. 

On Sun, Apr 25, 2021 at 10:29 José Juan Jiménez Alejandro <jjjimeneza@gmail.com> wrote:

I know, but someone has to give you an answer, maybe many of them keep silence and caution, it is not my case.

El vie, 23 abr 2021 a las 22:52, Ramin Kondori (<raminkondori@gmail.com>) escribió:

Dear Mr. José Juan Jiménez Alejandro,

I do not know why you felt it is addressed to you.

This is a general message...

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

But let's get back to the subject matter...

We have been in this situation before and it was sorted out.

But as I said, every once in a while, we see it happening again;

which is unfortunate...

This is a professional group and all the group members are expected to act accordingly...

Being respectful is not only about using nice words; sometimes people disrespect each other by their actions...

• Whenever anyone has a question, it is common sense that he/she does some research before taking other people's time. Anyone who can send an email to the group, obviously has access to websites like Google and almost in all cases, the answers could be easily found with a simple search. Of course, we all would be glad to help but this is the least a person can do to show his respect for the other group members.
• Please do your own research first; you will find most of the answer online. If there was any area that required more clarification, send your question to the group and our senior members are here to help you out.

Other members' time is as valuable as ours;

It is not respectful to expect others to do the things that we can easily do by ourselves...

This is basic ethics...

• The other issue is question like "Please send me a WPS with all the required information and documents necessary for this or that"...

This is a whole new level of disrespectful behavior...

When you see such questions, you can be 100% sure that the person who has sent the question is trying to take advantage of the positive attitude of the group members. 

How would you feel if your colleague does the same to you at work...?

Constantly coming to you with a very polite "sir, thank you very much sir", leaving his own work on your desk so you do it for them...?

This is not acceptable...

Everyone knows what's the deal with these questions...

But they do not say anything out of politeness...

They do not want to create an unpleasant atmosphere...

But we have all worked hard to be here...

We are not here to be taken advantage of...

Our esteemed members have not build this group to "Serve" lazy individuals...

We help each other here but it does not mean that people could bring their work here so that others do it for them...

I hope we would never have to bring up this issue again...

This is an old and friendly group of professionals...

Many of us have been here for more than 10 years...

Our friendship is longer than many friendships in the "real" world...

We all respect each other and intend to keep this group in the best shape as long as possible...

as it has been the case through all these years...

Kind 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 Fri, Apr 23, 2021 at 5:58 PM José Juan Jiménez Alejandro <jjjimeneza@gmail.com> wrote:

I want to assume that it is for the whole group, I do not remember having asked any questions to the members of the group on any occasion, I always investigate on my own, I generally have the codes, norms, standards and if I do not have them then I do a search In the net.
But if I have observed that some want their work problems to be solved and that does not seem entirely correct to me, however, I do not have any moral authority of any kind to oppose the freedom they have to express their doubts in a group like this.
Greetings!.

El vie, 23 abr 2021 a las 3:00, Chris Sabu (<chrissabu28@gmail.com>) escribió:

I think you have to take his comment with a little bit of salt.. there is no harm in asking but what might seem basic to us won't be the case for another .. Plus If there is like a search option with keyword so that we can search if the grades in our question has already been answered by someone before it would be nice . I haven't used this feature in groups so cannot confirm.

On Fri, Apr 23, 2021 at 11:51 José Juan Jiménez Alejandro <jjjimeneza@gmail.com> wrote:

I want to think that the message is for the whole group.

El jue, 22 abr 2021 a las 22:24, Ramin Kondori (<raminkondori@gmail.com>) escribió:

Unfortunately, every every once in a while, we see this unethical behaviour from some new members...

Please do some research before sending questions...

Group members will be glad to help but you should not take advantage and expect the group members to do all the work for you...

This is the group policy...

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

                        

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Independent Consultant in Parts

and Pressure Equipment

SUMMIT MÉXICO - TPI

https://www.linkedin.com/in/summit-m%C3%A9xico-tpi-760047137/

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THANKS AND REGARDS

CHRIS SABU

0559695451

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Independent Consultant in Parts

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SUMMIT MÉXICO - TPI

https://www.linkedin.com/in/summit-m%C3%A9xico-tpi-760047137/

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SUMMIT MÉXICO - TPI

https://www.linkedin.com/in/summit-m%C3%A9xico-tpi-760047137/

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0559695451

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Re: [MW:32336] Please do your homework before sending questions to the group

I know, but someone has to give you an answer, maybe many of them keep silence and caution, it is not my case.

El vie, 23 abr 2021 a las 22:52, Ramin Kondori (<raminkondori@gmail.com>) escribió:

Dear Mr. José Juan Jiménez Alejandro,

I do not know why you felt it is addressed to you.

This is a general message...

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

But let's get back to the subject matter...

We have been in this situation before and it was sorted out.

But as I said, every once in a while, we see it happening again;

which is unfortunate...

This is a professional group and all the group members are expected to act accordingly...

Being respectful is not only about using nice words; sometimes people disrespect each other by their actions...

• Whenever anyone has a question, it is common sense that he/she does some research before taking other people's time. Anyone who can send an email to the group, obviously has access to websites like Google and almost in all cases, the answers could be easily found with a simple search. Of course, we all would be glad to help but this is the least a person can do to show his respect for the other group members.
• Please do your own research first; you will find most of the answer online. If there was any area that required more clarification, send your question to the group and our senior members are here to help you out.

Other members' time is as valuable as ours;

It is not respectful to expect others to do the things that we can easily do by ourselves...

This is basic ethics...

• The other issue is question like "Please send me a WPS with all the required information and documents necessary for this or that"...

This is a whole new level of disrespectful behavior...

When you see such questions, you can be 100% sure that the person who has sent the question is trying to take advantage of the positive attitude of the group members. 

How would you feel if your colleague does the same to you at work...?

Constantly coming to you with a very polite "sir, thank you very much sir", leaving his own work on your desk so you do it for them...?

This is not acceptable...

Everyone knows what's the deal with these questions...

But they do not say anything out of politeness...

They do not want to create an unpleasant atmosphere...

But we have all worked hard to be here...

We are not here to be taken advantage of...

Our esteemed members have not build this group to "Serve" lazy individuals...

We help each other here but it does not mean that people could bring their work here so that others do it for them...

I hope we would never have to bring up this issue again...

This is an old and friendly group of professionals...

Many of us have been here for more than 10 years...

Our friendship is longer than many friendships in the "real" world...

We all respect each other and intend to keep this group in the best shape as long as possible...

as it has been the case through all these years...

Kind 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 Fri, Apr 23, 2021 at 5:58 PM José Juan Jiménez Alejandro <jjjimeneza@gmail.com> wrote:

I want to assume that it is for the whole group, I do not remember having asked any questions to the members of the group on any occasion, I always investigate on my own, I generally have the codes, norms, standards and if I do not have them then I do a search In the net.
But if I have observed that some want their work problems to be solved and that does not seem entirely correct to me, however, I do not have any moral authority of any kind to oppose the freedom they have to express their doubts in a group like this.
Greetings!.

El vie, 23 abr 2021 a las 3:00, Chris Sabu (<chrissabu28@gmail.com>) escribió:

I think you have to take his comment with a little bit of salt.. there is no harm in asking but what might seem basic to us won't be the case for another .. Plus If there is like a search option with keyword so that we can search if the grades in our question has already been answered by someone before it would be nice . I haven't used this feature in groups so cannot confirm.

On Fri, Apr 23, 2021 at 11:51 José Juan Jiménez Alejandro <jjjimeneza@gmail.com> wrote:

I want to think that the message is for the whole group.

El jue, 22 abr 2021 a las 22:24, Ramin Kondori (<raminkondori@gmail.com>) escribió:

Unfortunately, every every once in a while, we see this unethical behaviour from some new members...

Please do some research before sending questions...

Group members will be glad to help but you should not take advantage and expect the group members to do all the work for you...

This is the group policy...

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

                        

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RE: [MW:32333] I need complete detail or reports for successful cladding welding

Hello,

Please read this book. It covers various issues related welding of clad plates, pipes in great details. You may find answers to many of your questions here.

 

Regards.

 

Pradip Goswami.P.Eng, IWE.

Independent  & Consulting Welding & Metallurgical Specialist

Saudi Aramco Approved Designated Welding Engineer(DPWR)

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

Email:pgoswami@rogers.com,pradip.goswami@gmail.com

Cell/Whasapp:1-905-9793232

 

From: PK M <pkmqaqc@gmail.com>
Sent: April 23, 2021 10:55 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:32321] I need complete detail or reports for successful cladding welding

 

Dear All,

I need complete detail or reports for successful cladding welding..

What are the quality controls usually applied for a cladding welding / pipe weld joint?

What are the possible problems that may occur during the welding of cladding?

The question raised based on avoiding even Single weld defects?

Special technique / Application

 

Sour Service & non Sour service.

Base material - A333 Gr 6 + UNS N06625, API 5L Gr B + UNS N06625, API 5L X52 PSL2 SMLS + UNS N08825

Pipe Size Range- 1. 0.5" to 8" Thickness -2.77 mm to 6.02 mm

                             2. 0.5" to 4" Thickness -3.73 mm to 8.56 mm

                             3. 6" & Above Thickness -10.97 mm to 30.18 mm

Application/ Process – GTAW + SMAW 

Joint Type –Butt, Branch Conn, Fillet, Socket

Alloy Type -625 / 825

Clad/overlay – 3 to 5 mm

With PWHT / with PWHT

Applicable Code- ASME 31.3, Sec IX, SAES-0W-11

 

Thank you & thank you very much.

 

 

 

 

On Thu, Apr 22, 2021 at 9:12 AM Vinay Thattey <vinay.thattey@gmail.com> wrote:

Pl specify base material , thickness , application , design parameters , environment .... 

 

On Wed, 21 Apr 2021 at 08:23, PK M <pkmqaqc@gmail.com> wrote:

Dear All,

I need complete detail or reports for successful cladding welding ..

What are the quality controls usually applied for a cladding welding / pipe weld joint?

What are the possible problems that may occur during the welding of cladding?

The question raised based on avoiding even Single weld defects?

 Thank you & Thank you very much.

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