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 

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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

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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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