Re: [MW:35289] Welding consumable for S355J2WP material

S355 J2 WP 

is a weathering structural steel 

It has better atmospheric corrosion resistance.

Use E 8018 - W1/W2  Electrodes

This is regularly  available in market 

Vishwas

IWE 

9823472273

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On 20 Sep 2024, at 11:05 AM, sridhar cn <sridharcn305@gmail.com> wrote:



ER80S-Ni1(a nickel alloy filler wire), E81T1-Ni1C 9 (for FCAW process with 80 A+20 CO2) 

Please read it as "ER80S-Ni1(a nickel alloy filler wire), E81T1-Ni1C (for FCAW process with 

80 A+20 CO2)".

You can also try with E/ER309L which will help to avoid preheating or post weld cooing. But it 

is only an option.

Sridhar.

On Thu, 19 Sept 2024 at 19:27, sridhar cn <sridharcn305@gmail.com> wrote:

Mr.Xun Thong,

S355J2WP is a weathering steel.  E7018-1, E 8018-W2 (for higher strenths),

ER80S-Ni1(a nickel alloy filler wire), E81T1-Ni1C 9 (for FCAW process with 80 A+20 CO2) 

are generally suitable. 

Preheat & PWHT may be necessary to prevent cracking.

rgds,

Sridhar.

On Wed, 18 Sept 2024 at 21:22, Xuân Thông <xuanthong.hp@gmail.com> wrote:

Hi Experts,

Any one please give me the suggestion for welding consumables that will be used for S355J2WP.  If you have any WPS for this material, please let me know.

Thanks !

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Re: [MW:35290] SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure

Dear Friend :

Its not  a recommended combination. But can you please  describe its application? 

On Mon, 16 Sept 2024 at 13:07, Vijay Kumar <vijaytuty@gmail.com> wrote:

Dear Experts,

I need SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure with some reference codes. 

Please share 

Thanks 

Vijayakumar

+91 8238450968

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[MW:35291] Reg: Welding Procedure Qualification as per ISO15614

Dear experts... I have one clarification in ISO15614; I have a WPS qualified in Group No. 6.1 with Group No. 5.1... Shall I use this WPS for Group No. 6.1 with Group No. 5.2. As per table 5 in ISO 15614 we can use it. But I have a concern I have to use filler material with different chemical and Mechanical property (Cl.8.4.4) like instead of ER80S-B2 I will use ER90S-B3. My Qualification level as per ISO15614 is Level II. Pls suggest your opinion with back up. Thanks in advance...

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Re: [MW:35292] SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure

Which fillers have to use for P91-P22, nd P22-P11 , P11-106

On Sun, 22 Sept, 2024, 6:43 pm Vinay, <vinay.thattey@gmail.com> wrote:

Dear Friend :

Its not  a recommended combination. But can you please  describe its application? 

On Mon, 16 Sept 2024 at 13:07, Vijay Kumar <vijaytuty@gmail.com> wrote:

Dear Experts,

I need SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure with some reference codes. 

Please share 

Thanks 

Vijayakumar

+91 8238450968

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Re: [MW:35293] SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure

P91 - P22 - TYP B91 /B3

P22 -P11- TYP B3/B2

P11-SA 106 - B2/ Carbon steel 

Normally Higher alloy of the consumables

Deployed 

You can decided based on PQR 

Vishwas-IWE

9823472273

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On 23 Sep 2024, at 4:07 PM, Md Usman Ghani <mdushmanghani@gmail.com> wrote:



Which fillers have to use for P91-P22, nd P22-P11 , P11-106

On Sun, 22 Sept, 2024, 6:43 pm Vinay, <vinay.thattey@gmail.com> wrote:

Dear Friend :

Its not  a recommended combination. But can you please  describe its application? 

On Mon, 16 Sept 2024 at 13:07, Vijay Kumar <vijaytuty@gmail.com> wrote:

Dear Experts,

I need SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure with some reference codes. 

Please share 

Thanks 

Vijayakumar

+91 8238450968

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Re: [MW:35295] Ferrite content effects on corrosion

Dear Mohd Siraj,

Can you please provide a more precise answer to my question?

Your help will be highly appreciated.

On Tuesday, July 2, 2024 at 8:19:35 PM UTC+5 Mohd Siraj wrote:

it look like copy paste from chat gpt without even read the entire article. Many serious error are there..

technology can be used, but read and validate before answer it your way!

On Friday, May 31, 2024 at 8:09:17 AM UTC+3 Amol Betkar wrote:

Dear Tahir,

In urea production environments, materials used for constructing process equipment must be highly resistant to corrosion, particularly from carbamate solutions and other aggressive chemical compounds. For this reason, specific stainless steels such as 316 UG (Urea Grade) or 25Cr-22Ni-2Mo are preferred. These materials are designed to have very low or no ferrite content. Here's why controlling ferrite content is crucial in these grades and how ferrite can impact corrosion resistance:

Importance of Low Ferrite Content in Urea Grade Materials:

1. Corrosion Resistance:

   • Corrosion Susceptibility: Ferrite phase in stainless steels is generally more susceptible to corrosion in the aggressive environments found in urea production. Ferrite can form galvanic cells with the austenite phase, leading to localized corrosion.
   • Carbamate Corrosion: Urea production involves the formation of ammonium carbamate, which is highly corrosive. Ferrite phases can be more prone to attack by carbamate solutions, leading to pitting and other forms of localized corrosion.

2. Phase Stability:

   • Sigma Phase Formation: Ferrite is a precursor to the formation of sigma phase at high temperatures. Sigma phase is a brittle intermetallic compound that can drastically reduce toughness and corrosion resistance.
   • Chromium Depletion: The formation of sigma phase also causes chromium depletion in the surrounding matrix, further reducing the corrosion resistance of the material.

3. Mechanical Properties:

   • Embrittlement: Ferrite can contribute to embrittlement at low temperatures, which is undesirable in many industrial applications where toughness is required.

How Ferrite Content Causes Corrosion:

1. Galvanic Corrosion:

   • Differential Aeration Cells: Ferrite and austenite phases can form micro-galvanic cells. The anodic (ferrite) areas corrode preferentially, leading to localized corrosion like pitting or crevice corrosion.

2. Decreased Passivity:

   • Chromium Distribution: Ferrite tends to have a different distribution of alloying elements, such as chromium, compared to austenite. This can lead to regions with lower chromium content, reducing the formation of the passive oxide layer that protects stainless steel from corrosion.

3. Carbide Precipitation:

   • Sensitization: In ferritic regions, chromium carbides can precipitate at grain boundaries during thermal cycles, depleting chromium and making these regions more susceptible to intergranular corrosion.

Conclusion:

For urea grade materials such as 316 UG and 25Cr-22Ni-2Mo, maintaining a ferrite content lower than 0.6 percent or ensuring it is absent is essential to maximize corrosion resistance in the harsh environments of urea production. High ferrite content can lead to various forms of corrosion, including pitting, crevice corrosion, and intergranular corrosion, due to the formation of galvanic cells, phase instability, and localized depletion of chromium. Therefore, controlling the microstructure to minimize or eliminate ferrite is critical for ensuring the longevity and reliability of materials used in urea production plants.

On Thu, 30 May 2024 at 19:43, Talha Aamir <aamirt...@gmail.com> wrote:

Hi,

Why ferrite content should be lower than 0.6 percent or absent in Urea grade materials like 316 UG or 25Cr-22Ni-2Mo. How ferrite content causes corrosion ?

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Re: [MW:35294] Reg: Welding Procedure Qualification as per ISO15614

As per Table 5, Foot note b , it may not qualify

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015, ISO 3834, EN 15085, 

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Mon, Sep 23, 2024 at 3:34 PM s.harikrish s <harikrish1511@gmail.com> wrote:

Dear experts... I have one clarification in ISO15614; I have a WPS qualified in Group No. 6.1 with Group No. 5.1... Shall I use this WPS for Group No. 6.1 with Group No. 5.2. As per table 5 in ISO 15614 we can use it. But I have a concern I have to use filler material with different chemical and Mechanical property (Cl.8.4.4) like instead of ER80S-B2 I will use ER90S-B3. My Qualification level as per ISO15614 is Level II. Pls suggest your opinion with back up. Thanks in advance...

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[MW:35297] HIGH THICKNESS (80-120MM) PRESSURE VESSEL FABRICATION

Dear team,

We got an order for 120 mm the carbon steel pressure vessel from our customer. Is there any special care to follow during fabrication. It will be very helpful if anybody could share a procedure for high wall thick pressure vessel fabrication. I have no experience of high wall thick PV fabrication. 

Thanks in advance for your expert opinion.

Manoj.

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[MW:35298] RF pad requirement

Dear Experts

I have a question regarding the RF pad design. If a vessel's RF pad is designed as a full RF pad but is facing fabrication issues such as the welding not being allowed to touch and potential concerns with bolt placement, how does that impact our calculations?
Specifically, if the cutting portion of the RF pad is affected, do we need to recalculate the entire design calculations for that RF pad?

Thanks in advance for your expert opinion.

Akash

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[MW:35299] Re: RF pad requirement

plase mention if there is any code standard in ASME 

thank you in advance

On Saturday, October 5, 2024 at 10:26:00 AM UTC+5:30 akash sgk wrote:

Dear Experts

I have a question regarding the RF pad design. If a vessel's RF pad is designed as a full RF pad but is facing fabrication issues such as the welding not being allowed to touch and potential concerns with bolt placement, how does that impact our calculations?
Specifically, if the cutting portion of the RF pad is affected, do we need to recalculate the entire design calculations for that RF pad?

Thanks in advance for your expert opinion.

Akash

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[MW:35300] Re: SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure

this could be part of improper design or RF Pad support welding(fillet)? 

and this question already earlier answered in the group.

this kind of joint can be further welded or joint by weld flange at each and then bolted with insulated bolt., 

however service temperature variation may affect both joint thermal expansion that need to add by metal expansion joint at CS side.

pl do not joint directly by welding. Or else use transition spool as mentioned above if you have multiple WPS's/PQR's to support these welding.

On Monday, September 16, 2024 at 10:37:39 AM UTC+3 Vijay Kumar wrote:

Dear Experts,

I need SA335 P91 to SA106Gr.B Dissimilar Material Welding Procedure with some reference codes. 

Please share 

Thanks 

Vijayakumar

+91 8238450968

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[MW:35301] Re: Material Certification 3.1 / 3.2/2.2--EIL India

Hi 

Can any body respond at what stage an independent inspector witness material testing for certification of 3.2.?

On Wednesday, December 19, 2018 at 6:03:43 PM UTC+5:30 shaikh ahmed wrote:

Dear Friends,

Please can you advise in which EIL Standard or API standard  to find the material certification requirement  EN3.1 or 3.2 or 2.2 for Pumps ( various components) in EIL Specification.

waiting for your response.

thanks.

Ahmed

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Re: [MW:35302] Acceptance for Ovality in mid section of 90 deg Elbow [**EXTERNAL**]

Dear Sir,

Could you please inform me about the permissible variation for elbow ovality? and also about that Tolerances of pipe and fittings deviation same or different.

On Thursday 1 September 2016 at 16:10:25 UTC+5 Faizal, Majeed [c] wrote:

Dear All,

 

According to ASME B31.3, Section 332.2 Bending, flattering or ovality of a bend , the difference between maximum and minimum diameters at any cross section, should not exceed 8% of nominal outside diameter.

 

 

 

Thanks & Regards,

________________________

Faizal R Majeed

QC Piping/Mechanical

Saudi Chevron Phillips Chemical

Office  (+966) 13 3568100 Ext.1466

E-mail   : fai...@saudichevron.com

P Think Green!!!  Please consider your environmental responsibility before printing this e-mail.

 

 

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of M S R K S Prasad
Sent: Thursday, September 01, 2016 9:11 AM
To: material...@googlegroups.com
Subject: [MW:25335] Acceptance for Ovality in mid section of 90 deg Elbow [**EXTERNAL**]

 

*** WARNING: This email originated outside of the CPChem network. Use caution opening attachments, clicking web links, or replying. ***
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Dear Members,

Recently we have ordered   8" X 20.62 mm thk 90 deg SMLS long radius (1.5 D)  A403 WP 316L modified(Urea grade)  elbows to be supplied as per ASME B 16.9  standard.

On verification of the elbows received at our site we found ovality in the mid section of the elbows.

The sketch showing the dimensions measured in the mid section is attached for reference.


When we verified ASME B 16.9 we found information about acceptance  for out of roundness at end only.  

Nothing was mentioned about acceptance  criteria for  ovality at the middle of the 90 deg elbow.

Learned members are requested to guide me  in this matter .

regards


M.S.R.K.Srinivasa Prasad
A.G.M ( General Engg)
Nagarjuna Fertilizers And Chemicals Ltd
Nagarjuna Road
KAKINADA-533003
Ph: 0884-2360212(O),9676931414
                 2379302(R)
----- Forwarded by M S R K S Prasad/MAINT/KKD/NFCL/NAGARJUNA on 01/09/2016 11:37 AM -----

From:	"PEMMARAJU RAGHAVENDRA" <r...@hzw.ltindia.com>
To:	<material...@googlegroups.com>,
Date:	15/01/2010 10:00 AM
Subject:	Re: [MW:4049] Linear Indications After Pickling and passivation and         PWHT
Sent by:	material...@googlegroups.com

 

---

Dear All,
Thanks for the response given to me explaining the root cause of the same.
Could any of you help me in telling how to rectify / salvage the existing shell with the indications at the toes as mentioned below.

Regards,
Raghavendra  

Larsen & Toubro Limited
www.larsentoubro.com

This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system.


>>> "PEMMARAJU RAGHAVENDRA" <r...@hzw.ltindia.com> 12/01/2010 09:01 am >>>
Dear All,

I have a typical problem with my vendor who is manufacturing Coke drums for us.
The stage of NDT including RT is such that we need to take RT before PWHT and before overlay.

One of the section ( shell to Shell) under went the above process and cleared. After that it was overlayed by AWS class Inconel E NiCrFe3 electrodes on base plates ( SA387 Gr.11 ClassII) with 410S cladding on either side. Later the same was subjected to Pickling and passivation and went for PWHT.

Now durng APWHT stage, when we are performing PT and RT, surprisingly we are getting two wagon track linear indications on either sides of weld toes from inside ( on cladding side) which are exactly the border junction of ENiCrFe3 inconel and 410S cladding of the shell plates.
It is having a depth of around 0.5mm and width also same.

Could any one explain the cause of formation of this indication at the above juncture. As per our estimation, it could have happend due to pickling and passivation. Since another shell with above processes ( except pickling and passivation ) has not got any such indications.

Thanks for your time and efforts.

Regards,
Raghavendra  



Larsen & Toubro Limited
www.larsentoubro.com

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Re: [MW:35302] Re: Material Certification 3.1 / 3.2/2.2--EIL India

For Valve case it should be from Pouring to final test 

For Plate/Pipe- start from Raw material to final test

On Tue, Oct 8, 2024 at 1:04 PM israr <ahmedisrar.nm@gmail.com> wrote:

Hi 

Can any body respond at what stage an independent inspector witness material testing for certification of 3.2.?

On Wednesday, December 19, 2018 at 6:03:43 PM UTC+5:30 shaikh ahmed wrote:

Dear Friends,

Please can you advise in which EIL Standard or API standard  to find the material certification requirement  EN3.1 or 3.2 or 2.2 for Pumps ( various components) in EIL Specification.

waiting for your response.

thanks.

Ahmed

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[MW:35304] Minium distance between two joints in Pipeline.

Dear Friends,

Can any one tell Minium distance between two joints in Pipeline/API 1104.

Thanks 

Prabhu 

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Re: [MW:35305] Minium distance between two joints in Pipeline.

FYR.....

On Thu, 10 Oct 2024, 15:41 Prabhu PN, <prabhu.2k5@gmail.com> wrote:

Dear Friends,

Can any one tell Minium distance between two joints in Pipeline/API 1104.

Thanks 

Prabhu 

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[MW:35306] Re: SA 387 Grade 22 Cl.2 - Welding Crack

Hi Dear

You should do DHT operation immediately after finishing the welding process

post heating is to minimize the susceptibility to cold cracking due to residual hydrogen in the welds and to minimize problems due to low as-welded toughness. Because of hydrogen pick up during the welding process, a dehydrogenation heat treatment is applied to the weld to outgas the hydrogen before a weld allowed to cool.

DHT will be started at 300 C within a minimum 200 mm band with weld in the center line promptly at the first strike of arc and will be finished minimum 2 hours after taking the strike off the base metal.

Thanks,

On Wednesday, September 11, 2024 at 1:52:03 PM UTC+3:30 williams p wilson wrote:

Hai Experts,

Greetings!!

Hope you are doing well.

We found crack on Turbine Exhaust Stack butt weld joints made by 6 mm thick, SA 387 Grade 22 Cl.2 

We repaired with E91T1-B3 with FCAW welding process  with a preheat of 140 degree C , maximum Interpass temp. of 240 degree C.

But again welding crack observed while doing the MPI, request to please share your comments to solve this matter.

Thank You & Regards

Williams P Wilson

+968-94600828

QA/QC Engineer

Please consider the environment before printing this message

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Re: [MW:35307] Re: SA 387 Grade 22 Cl.2 - Welding Crack

Welding SA 387 Grade 22 Cl.2, a high-strength alloy steel, can lead to issues like cracking if not handled properly. During the welding process:

o  Preparation: Preheating to 150⁰ C or as per specific guidelines or standards is essential to reduce the cooling rate of the weld and minimize 

    the risk of cracking.

o  Welding Procedure: Control the heat input with proper welding parameters Ampere, voltage, and travel speed) to avoid residual stresses.

o  Use Interpass Temperature Controls: Monitor the Interpass temperature to 250⁰ C to prevent overheating of the weld area.

o  Welding Technique: Instead of weaving, use stringer beads to reduce heat input and distortion.

o  Post-Welding Treatment: Post-heat weld and HAZ areas to 300-350 ⁰ C to release residual Hydrogen.

o  Post-Weld Heat Treatment: PWHT to 700°C to 760°C (but specific requirements may vary) to relieve residual stresses that may have been 

    introduced during welding.

o  Slow Cooling: Allow the welded assembly to cool slowly by 50 to 75⁰C (up to 325⁰C and air cool to room temperature to minimize the risk of 

    cracking.

o  Welding Environment: Avoid welding in windy (do not use fans) to evade faster cooling during welding and lead to cracking.

o  Training and Skill Development: Ensure Proper Training for Welders: Using skilled welders (under proper supervision & Inspection) familiar 

    with the specific requirements for welding LAHT steels can significantly reduce the risk of defects.

o  Filler wire: E 91T5-B3, a basic type of FCAW filler wire, designed to weld LAHT steels can be used in place of E 91 T1-B3 filler wire which is a 

    rutile version and may have moisture content.                                                                                                                                          

    But, why use a FCAW process for a 6 mm thick? You can also weld with an ER91-B3 (Hyundai, Kobe or equivalent brand) which may have less than 

    3 ppm hydrogen and help to avoid weld cracks. If it is a small job, you can use a GTAW / SMAW process too.

o  Repair welding: Follow the above procedure including a DP / MT test(s) after removing all the cracks through grinding and before repair welding. 

Hope the above inputs may help to avoid cracks while welding SA 387 Grade 22 Cl.2 material.

C Sridhar.

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

On Sun, 13 Oct 2024 at 16:22, Alireza Aghaei <ar.aghaie07@gmail.com> wrote:

Hi Dear

You should do DHT operation immediately after finishing the welding process

post heating is to minimize the susceptibility to cold cracking due to residual hydrogen in the welds and to minimize problems due to low as-welded toughness. Because of hydrogen pick up during the welding process, a dehydrogenation heat treatment is applied to the weld to outgas the hydrogen before a weld allowed to cool.

DHT will be started at 300 C within a minimum 200 mm band with weld in the center line promptly at the first strike of arc and will be finished minimum 2 hours after taking the strike off the base metal.

Thanks,

On Wednesday, September 11, 2024 at 1:52:03 PM UTC+3:30 williams p wilson wrote:

Hai Experts,

Greetings!!

Hope you are doing well.

We found crack on Turbine Exhaust Stack butt weld joints made by 6 mm thick, SA 387 Grade 22 Cl.2 

We repaired with E91T1-B3 with FCAW welding process  with a preheat of 140 degree C , maximum Interpass temp. of 240 degree C.

But again welding crack observed while doing the MPI, request to please share your comments to solve this matter.

Thank You & Regards

Williams P Wilson

+968-94600828

QA/QC Engineer

Please consider the environment before printing this message

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[MW:35308] Tack weld requirements ASME / EN

Dears

regarding the tack weld I use the rod, both for supports installation EN 15609-1 and stainless steel piping installation according ASME IX.

There is any requirements that allow or prohibits to use the rod?

the rod with same material and certificate 3.1 etc etc.

thank you 

Matteo 

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Re: [MW:35309] Re: SA 387 Grade 22 Cl.2 - Welding Crack

Fcaw should be avoid ,and Follow the Post heat after welding ,  Fcaw not suitable for this Material and thickness range

On Sun, 13 Oct 2024, 21:34 sridhar cn, <sridharcn305@gmail.com> wrote:

Welding SA 387 Grade 22 Cl.2, a high-strength alloy steel, can lead to issues like cracking if not handled properly. During the welding process:

o  Preparation: Preheating to 150⁰ C or as per specific guidelines or standards is essential to reduce the cooling rate of the weld and minimize 

    the risk of cracking.

o  Welding Procedure: Control the heat input with proper welding parameters Ampere, voltage, and travel speed) to avoid residual stresses.

o  Use Interpass Temperature Controls: Monitor the Interpass temperature to 250⁰ C to prevent overheating of the weld area.

o  Welding Technique: Instead of weaving, use stringer beads to reduce heat input and distortion.

o  Post-Welding Treatment: Post-heat weld and HAZ areas to 300-350 ⁰ C to release residual Hydrogen.

o  Post-Weld Heat Treatment: PWHT to 700°C to 760°C (but specific requirements may vary) to relieve residual stresses that may have been 

    introduced during welding.

o  Slow Cooling: Allow the welded assembly to cool slowly by 50 to 75⁰C (up to 325⁰C and air cool to room temperature to minimize the risk of 

    cracking.

o  Welding Environment: Avoid welding in windy (do not use fans) to evade faster cooling during welding and lead to cracking.

o  Training and Skill Development: Ensure Proper Training for Welders: Using skilled welders (under proper supervision & Inspection) familiar 

    with the specific requirements for welding LAHT steels can significantly reduce the risk of defects.

o  Filler wire: E 91T5-B3, a basic type of FCAW filler wire, designed to weld LAHT steels can be used in place of E 91 T1-B3 filler wire which is a 

    rutile version and may have moisture content.                                                                                                                                          

    But, why use a FCAW process for a 6 mm thick? You can also weld with an ER91-B3 (Hyundai, Kobe or equivalent brand) which may have less than 

    3 ppm hydrogen and help to avoid weld cracks. If it is a small job, you can use a GTAW / SMAW process too.

o  Repair welding: Follow the above procedure including a DP / MT test(s) after removing all the cracks through grinding and before repair welding. 

Hope the above inputs may help to avoid cracks while welding SA 387 Grade 22 Cl.2 material.

C Sridhar.

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

On Sun, 13 Oct 2024 at 16:22, Alireza Aghaei <ar.aghaie07@gmail.com> wrote:

Hi Dear

You should do DHT operation immediately after finishing the welding process

post heating is to minimize the susceptibility to cold cracking due to residual hydrogen in the welds and to minimize problems due to low as-welded toughness. Because of hydrogen pick up during the welding process, a dehydrogenation heat treatment is applied to the weld to outgas the hydrogen before a weld allowed to cool.

DHT will be started at 300 C within a minimum 200 mm band with weld in the center line promptly at the first strike of arc and will be finished minimum 2 hours after taking the strike off the base metal.

Thanks,

On Wednesday, September 11, 2024 at 1:52:03 PM UTC+3:30 williams p wilson wrote:

Hai Experts,

Greetings!!

Hope you are doing well.

We found crack on Turbine Exhaust Stack butt weld joints made by 6 mm thick, SA 387 Grade 22 Cl.2 

We repaired with E91T1-B3 with FCAW welding process  with a preheat of 140 degree C , maximum Interpass temp. of 240 degree C.

But again welding crack observed while doing the MPI, request to please share your comments to solve this matter.

Thank You & Regards

Williams P Wilson

+968-94600828

QA/QC Engineer

Please consider the environment before printing this message

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