Materials & Welding: March 2021

Wednesday, March 31, 2021

[MW:32131] interruption limitations to stop welding

Dear All ,

In our Pressure vessel project 10mm thickness plate they using (GTAW+SAW) process , They have welded GTAW with 4 mm of 10mm thickness and leave open for 1 days .. I like to Know what is the interruption limitations to stop welding Limits for <19mm thickness

Please send me code documents

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[MW:32130] Charpy Test of Inconnel (ASME B 31.3)

Hi All,

Could you please advise, when does ASME B31.3 require to perform Charpy Test for Inconel Material (UNS 06625)?

After which MDT it is mandatory to perform it?

Regard,

Ilkin HASANOV.

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Re: [MW:32129] RWC (Responsible Welding Coordinator)

Where do you want to sign on WPS/PQR ? as a preparer or checker or approver ?

You may not sign in any of these areas, The role is to perform quality checks during manufacturing and it shall be defined by your QA/QC manager / Document systems.

You can assist IWE/IWT for preparing WPS/PQR , but the final responsibilities lie with the IWE/IWT holder only.

Even some case, IWT holders sign itself not accepted by some clients

Refer ISO 3834-2 , Clause 7.3

Also, as per above link,

It's clear that RWC is not a portable title since There is no actual qualification for personnel responsible for welding coordination.

only IWE, IWT , IWS have been accepted as satisfying the specific knowledge requirements for Responsible Welding Coordinators.

Thanks and Regards

Rameshkannan D

"What you have learned is a mere handful; What you haven't learned is the size of the world – Avvaiyar"

On Tue, Mar 30, 2021 at 5:00 PM ilkinhasanov <ilkinhasanov.91@gmail.com> wrote:

Hi Gents,

Could you please advise ; does RWC (ISO 3834-2) can issue/sign WPS & WPQR and is it requirement of Standard/Codes that RWC should has a IWE Diploma for this?.

Regards,
Ilkin HASANOV

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[MW:32128] Saudi Aramco CBT Welding Piping EXAM related Documents

Dear Experts,

Please Share Saudi Aramco CBT Welding Piping EXAM related all Documents.

Thanks in Advance.

PKM.

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Tuesday, March 30, 2021

Re: [MW:32122] Cladding Welding

I am sending you two examples, if I am not mistaken, the Inconel is a P43 under the ASME scheme, but take this into account: they are only examples !, which will undoubtedly serve as a guide for you to do your own procedures.  Greetings!.

El mar, 30 mar 2021 a las 2:38, PK M (<pkmqaqc@gmail.com>) escribió:

Dear Experts,

Any one have WPS for Inconel 718 , 625 , & 825 on materials ?

any cladding welding related Method statements or procedure.

Please share.

Thanks in Advance

PKM.

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Ing. José Juan Jiménez Alejandro

Independent Consultant in Parts

and Pressure Equipment

SUMMIT MÉXICO - TPI

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

Móvil +52 1 812 352 4606

Skype: jjjimeneza

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Re: [MW:32122] RWC (Responsible Welding Coordinator)

Not mandatory but u should have sufficient knowledge experience in welding. 3834 system for qualification fusion welding of shop.

On Tue, Mar 30, 2021, 5:00 PM ilkinhasanov <ilkinhasanov.91@gmail.com> wrote:

Hi Gents,

Could you please advise ; does RWC (ISO 3834-2) can issue/sign WPS & WPQR and is it requirement of Standard/Codes that RWC should has a IWE Diploma for this?.

Regards,
Ilkin HASANOV

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Re: [MW:32122] Require grade of CS pipe as per PMI values

Dear Rajnish,

Its not our in-house materials, this is the existing material used in Loading Arm. Client wants us to replace it with same one. they just provided the PMI on XRF method, however we have requested for OES and a sample for chemical analysis to look further.

Thanks for your support

Best Regards

Dhana

On Tue, Mar 30, 2021 at 2:02 PM 'Rajnish Dixit' via Materials & Welding <materials-welding@googlegroups.com> wrote:

If you have neither any idea about pipe's material specification nor the material test certificate, it is not advisable to confirm the same with merely PMI or chemical testing. Please avoid this material to use as pressure part in your job.

Thanks,
Best Regards,
Rajnish Dixit

Sent from Yahoo Mail on Android

On Sun, 28 Mar 2021 at 18:03, Dhanabal Jalachandran
<dhanabal.jalachandrann@gmail.com> wrote:

Dear Expert,

Find the below chemical composition values as per PMI, unfortunately we do not have any Test certificate and traceability. Can you please provide an update.

Carbon Steel
Fe 97.8%
Ti 0.85%
Co 0.62%
Mn 0.50%
Zn 0.17%
Cr 0.06%

Thanks in advance
--
Regards
Dhanabal Jalachandran

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Regards

Dhanabal Jalachandran

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Re: [MW:32122] Sulfuric acid drum nozzle problem

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, <okaytutar@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:32122] RWC (Responsible Welding Coordinator)

Please refer ISO 3834-5, Annex A.

I think you can sign the document.

On Tue, 30 Mar, 2021, 5:00 pm ilkinhasanov, <ilkinhasanov.91@gmail.com> wrote:

Hi Gents,

Could you please advise ; does RWC (ISO 3834-2) can issue/sign WPS & WPQR and is it requirement of Standard/Codes that RWC should has a IWE Diploma for this?.

Regards,
Ilkin HASANOV

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Re: [MW:32122] RWC (Responsible Welding Coordinator)

Dear ,

Pl Refer the web Link

https://www.iso3834.org/faqs/

On Tuesday, 30 March, 2021, 03:30:34 pm GMT+4, ilkinhasanov <ilkinhasanov.91@gmail.com> wrote:

Hi Gents,

Could you please advise ; does RWC (ISO 3834-2) can issue/sign WPS & WPQR and is it requirement of Standard/Codes that RWC should has a IWE Diploma for this?.

Regards,

Ilkin HASANOV

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[MW:32121] RWC (Responsible Welding Coordinator)

Hi Gents,

Could you please advise ; does RWC (ISO 3834-2) can issue/sign WPS & WPQR and is it requirement of Standard/Codes that RWC should has a IWE Diploma for this?.

Regards,

Ilkin HASANOV

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Re: [MW:32119] Sulfuric acid drum nozzle problem

Dear sir,

Greetings

kindly make sure that the pipe thickness is not thinned using DIGITAL RT if possible.

We experienced the same problem in repair of sulphuric acid vertical mounted vessel , Carbon steel A 516 Gr B , nozzle failure .

later we found under deposit corrosion of nozzle pipes . the we back gouged and flush grounded with E-316 for repair.

please update , if you got better solution.

Regards

Vinoth kanna

QC- welding & piping inspector

Manifa Project

API -510, CSWIP 3.1, NDT level II - UT, RT ,PT, MT, VT,LT,Infrared & Thermography

Technical - Metallurgy

Contact : M - +91-9787954338,+966-539127946

Email id : srvkanna1@gmail.com

On Tue, Mar 30, 2021 at 2:01 PM okay Tutar <okaytutar@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:32119] Require grade of CS pipe as per PMI values

If you have neither any idea about pipe's material specification nor the material test certificate, it is not advisable to confirm the same with merely PMI or chemical testing. Please avoid this material to use as pressure part in your job.

Thanks,

Best Regards,

Rajnish Dixit

Sent from Yahoo Mail on Android

On Sun, 28 Mar 2021 at 18:03, Dhanabal Jalachandran
<dhanabal.jalachandrann@gmail.com> wrote:

Dear Expert,

Find the below chemical composition values as per PMI, unfortunately we do not have any Test certificate and traceability. Can you please provide an update.

Carbon Steel
Fe 97.8%
Ti 0.85%
Co 0.62%
Mn 0.50%
Zn 0.17%
Cr 0.06%

Thanks in advance
--
Regards
Dhanabal Jalachandran

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.

[MW:32118] Cladding Welding

Dear Experts,

Any one have WPS for Inconel 718 , 625 , & 825 on materials ?

any cladding welding related Method statements or procedure.

Please share.

Thanks in Advance

PKM.

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[MW:32117] Sulfuric acid drum nozzle problem

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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Monday, March 29, 2021

Re: [MW:32115] API 650

Ref: API 650: 8.1.5 Radiographic Standards
Welds examined by radiography shall be judged as acceptable or
unacceptable by the standards of Paragraph UW-51(b) in Section
VIII of the ASME Code

On Fri, Jan 22, 2021 at 2:17 PM chitko khaing
<chitkokhaing2009@gmail.com> wrote:
>
> Dear all
> I am chit ko from Myanmar. i want to know " API 650 RT acceptance Criteria" refer to ASME VIII Division 1?
>
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Re: [MW:32115] Impact energy Vs Structure

Martensite formation depends also on the chemical composition and not only on the cooling rate.

The last weld bead has not a fine grain structure. It has more a dendritic structure.

Fine grain martensite will give low impact energy

Fine grain ferrite will give better impact energy.

Residual stresses also affect impact energy in a negative way.

In the mild steel the PWHT is to relief the residual stresses and not to temper the martensite.

Στις Πέμ, 25 Μαρ 2021 στις 5:13 π.μ., ο/η EmaD FaRaHanI <emad.farahani@gmail.com> έγραψε:

Dear Friends,
Consider we have a mild-steel, cooling fast from welding temperature, we must have a fine grain structure with martensite formation.
Hypothetically, considering that we want to use this structure. I was wondering what is the relation between the impact energy and the structure? will it be decreased due to martensite formation? or increased due to fine grain? I understand that we don't use the martensite state of structures and we need to quench and tempering them.

Thanks,
Emad

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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[MW:32111] Pipe Laying process

Hello experts,

In the current project,we are faced with the challenge of laying pipes below a canal.The design is to lay 1600 mm steel pipes which is to be welded inside a concrete pipe installed via jacking method.Please advice us on how to proceed with laying the pipes in this method.Thanks

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Sunday, March 28, 2021

Re: [MW:32111] Require grade of CS pipe as per PMI values

Do chemical analysis _ Spectro or weight ana

PMI is not right method.

On Sun, 28 Mar 2021, 16:33 Dhanabal Jalachandran, <dhanabal.jalachandrann@gmail.com> wrote:

Dear Expert,

Find the below chemical composition values as per PMI, unfortunately we do not have any Test certificate and traceability. Can you please provide an update.

Carbon Steel
Fe 97.8%
Ti 0.85%
Co 0.62%
Mn 0.50%
Zn 0.17%
Cr 0.06%

Thanks in advance
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Dhanabal Jalachandran

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Re: [MW:32111] Impact energy Vs Structure

The martensite phase essentially consists of a metastable iron phase oversaturated in carbon. Since the more carbon a steel has, the harder and more brittle it is, a martensitic steel is very hard and brittle. Because the cooling rate is so sudden, carbon does not have enough time for diffusion. Yes ,impact energy absorbing capacity will decrease..

On Thu, 25 Mar 2021 at 08:43, EmaD FaRaHanI <emad.farahani@gmail.com> wrote:

Dear Friends,
Consider we have a mild-steel, cooling fast from welding temperature, we must have a fine grain structure with martensite formation.
Hypothetically, considering that we want to use this structure. I was wondering what is the relation between the impact energy and the structure? will it be decreased due to martensite formation? or increased due to fine grain? I understand that we don't use the martensite state of structures and we need to quench and tempering them.

Thanks,
Emad

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Re: [MW:32111] API 650

SEC-VIII UW51.(b)

On Sun, Mar 28, 2021 at 4:33 PM Pankaj Kolhe <pankaj.kolhe15@gmail.com> wrote:

Yes

On Fri, Jan 22, 2021 at 2:17 PM chitko khaing <chitkokhaing2009@gmail.com> wrote:
Dear all
I am chit ko from Myanmar. i want to know " API 650 RT acceptance Criteria" refer to ASME VIII Division 1?

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Re: [MW:32107] Simulations PWHT

Yes this is client requirement,

1+ 2 simulation cycle required.

has client asked for plate , pipe, flanges and fittings?

On Thu, Jan 21, 2021 at 1:53 PM sajeed zaheer <sajeed7674@gmail.com> wrote:

Hello Everyone,

As per Sec 8 code there is no were written about the simulation PWHT, but in the ARAMCO specification I'm encountering with this simulation PWHT, Two PWHT cycle to account for future repair.Please clarify my doubt about the simulation PWHT.

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Re: [MW:32107] API 650

Yes

On Fri, Jan 22, 2021 at 2:17 PM chitko khaing <chitkokhaing2009@gmail.com> wrote:

Dear all
I am chit ko from Myanmar. i want to know " API 650 RT acceptance Criteria" refer to ASME VIII Division 1?

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Re: [MW:32107] NACE SP0472-PWHT - AMINE service

Correct,

Refer API RP 945 for amine service.

PWHT is required and hardness control is required.

On Mon, Feb 1, 2021 at 8:43 AM PSS <mechselastine@gmail.com> wrote:

Experts

Client Requirement : Vessel shall be PWHT. Production Weld deposits hardness shall not exceed 200HBW after PWHT. Carbon steel welds shall comply with NACE STD SP0472 para. 2.2 & 3.3

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[MW:32107] Require grade of CS pipe as per PMI values

Dear Expert,

Find the below chemical composition values as per PMI, unfortunately we do not have any Test certificate and traceability. Can you please provide an update.

Carbon Steel

Fe 97.8%
Ti 0.85%
Co 0.62%
Mn 0.50%
Zn 0.17%
Cr 0.06%

Thanks in advance

Regards

Dhanabal Jalachandran

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Saturday, March 27, 2021

[MW:32106] Radiography on Bronze casting material

Dear Experts

Need opinion on radiography source selection for bronze casted raw material sleeve of size OD 400mm X ID 364mmn X Length-446mm.

Grade CuSn12Ni2-CG (DIN EN 1982)

What are factor need to consider for the radiography testing on this material. What is the sensitivity of the same?

Regards

Suresh

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Re: [MW:32105] Impact energy Vs Structure

Greetings

When carbon steel (BCC) - cools rapidly it forms BCT -martensite .

When Austenitic Stainless steel (FCC) - Rapid cool may form FCT martensite . Based on CCT AND TTT diagrams.

Regards

Vinoth kanna

9787954338

On Sat, 27 Mar 2021, 11:05 sunil kaushik, <sunilkaushik08@gmail.com> wrote:

What is the difference between BCT and FCT structure?

On Thu, 25 Mar, 2021, 9:29 am Vinoth kanna ramachandran, <srvkanna1@gmail.com> wrote:
Dear sir,

Greetings for the day

Mild steel - BCC structure (body centred cubic )
Austenite stainless steel - FCC structure (face centered cubic)
Martensite - FCT structure ( face centred tetragonal )

coarse grain means - less FCT crystals , fine grain means - More FCT crystals.

Tetragonal structure can't absorb more impact energy , due to its crystal structure , since it prevents its movement . if it's fine grain , still more difficulty to absorb energy .

That's why FCC crystals have better impact properties than any other in the steel family .Fine Grain FCC - greater impact energy absorption.

Regards

Vinoth kanna
QC- welding & piping inspector
Manifa Project

API -510, CSWIP 3.1, NDT level II - UT, RT ,PT, MT, VT,LT,Infrared & Thermography
Technical - Metallurgy

Contact : M - +91-9787954338,+966-539127946
Email id : srvkanna1@gmail.com

On Thu, Mar 25, 2021 at 8:43 AM EmaD FaRaHanI <emad.farahani@gmail.com> wrote:
Dear Friends,
Consider we have a mild-steel, cooling fast from welding temperature, we must have a fine grain structure with martensite formation.
Hypothetically, considering that we want to use this structure. I was wondering what is the relation between the impact energy and the structure? will it be decreased due to martensite formation? or increased due to fine grain? I understand that we don't use the martensite state of structures and we need to quench and tempering them.

Thanks,
Emad

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Friday, March 26, 2021

Re: [MW:32102] Impact energy Vs Structure

What is the difference between BCT and FCT structure?

On Thu, 25 Mar, 2021, 9:29 am Vinoth kanna ramachandran, <srvkanna1@gmail.com> wrote:

Dear sir,

Greetings for the day

Mild steel - BCC structure (body centred cubic )
Austenite stainless steel - FCC structure (face centered cubic)
Martensite - FCT structure ( face centred tetragonal )

coarse grain means - less FCT crystals , fine grain means - More FCT crystals.

Tetragonal structure can't absorb more impact energy , due to its crystal structure , since it prevents its movement . if it's fine grain , still more difficulty to absorb energy .

That's why FCC crystals have better impact properties than any other in the steel family .Fine Grain FCC - greater impact energy absorption.

Regards

Vinoth kanna
QC- welding & piping inspector
Manifa Project

API -510, CSWIP 3.1, NDT level II - UT, RT ,PT, MT, VT,LT,Infrared & Thermography
Technical - Metallurgy

Contact : M - +91-9787954338,+966-539127946
Email id : srvkanna1@gmail.com

On Thu, Mar 25, 2021 at 8:43 AM EmaD FaRaHanI <emad.farahani@gmail.com> wrote:
Dear Friends,
Consider we have a mild-steel, cooling fast from welding temperature, we must have a fine grain structure with martensite formation.
Hypothetically, considering that we want to use this structure. I was wondering what is the relation between the impact energy and the structure? will it be decreased due to martensite formation? or increased due to fine grain? I understand that we don't use the martensite state of structures and we need to quench and tempering them.

Thanks,
Emad

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[MW:32102] Nitric Acid storage tank AL 1080

Hi ,

Pl recommend the filler metal & welding process for 10 mm thick Aluminium AL 1080 tank for nitric Acid storage purpose.

Urgent response required.

Thanks & Regards

Riaz

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RE: [MW:32101] ductile iron welding procedure

Hi Cast Irons are typically subjected to repair weld. The repair welding is normally done by Nickel based electrodes, 99% Ni or 55% Ni electrodes. This applies to any welding on new cast iron pipes also. It's extremely difficult to meet ASME Sec-IX welding qualification criteria for Cast Iron Welding.

The links cited below would provide you good resources for Cast Iron Welding.

Thanks.

Pradip Goswami.P.Eng, IWE.

Independent & Consulting Welding & Metallurgical Engineering Specialist

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

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

Cell/Whasapp:1-905-9793232

Can You Weld Cast Iron? (A Complete Guide) - TWI (twi-global.com)

Sec. 8 Introduction (ductile.org)

From: luis carlos greggianin <luiscargreg8@gmail.com>
Sent: March 25, 2021 5:53 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:32090] ductile iron welding procedure

Use shot penning during the weld too

Em Qui, 25 de mar de 2021 00:13, QA/QC <adnanziad49@gmail.com> escreveu:

Dear master

in our project we have a leak in fire water service and I want to know the repair procedure for the pipe

ductile iron C151A21.51

electrode rod using for and procedure if possible
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