RE: [MW:32404] LAS P11 minimum required hardness for operation

Dear Devang,

This P11 material is already affected by creep, the microstructures reveal it.

It has accumulation of microstructural damages due to prolong operation (10 years) decreasing their load bearing capacity, with formation of Cr carbides at the grain boundaries and carbon dissolution in the matrix.

You have to notify the plant of the need to change that section of pipe affected by creep, due to the risk of sudden cracking, with operational consequences.

On the other hand, under normal conditions, the welding of P11 material (1 ¼ Cr - ½ Mo) should has maximum hardness of 225 HBN for service at high temperature operating.

A good solution is use the material P22 (2 ¼ Cr-1/2 Mo). Propose it.

 

Regards,

Ramon Briceno

http://www.linkedin.com/in/ramonbriceno-metalengineer

 

Sent from Mail for Windows 10

 

From: Devang Majithia
Sent: Friday, May 28, 2021 1:27 AM
To: materials-welding@googlegroups.com
Subject: [MW:32392] LAS P11 minimum required hardness for operation

 

Dear All,

Hope all are safe and doing good in this tough time.

 

36" LAS P11 steel is used in FCC Reactor O/H line with operating temperature of 500-530 Deg. C. Design temp. is 569 Deg. C. Creep temperature starts from 427 Deg. C as per API 571. Line in service for 10 yrs.

 

Insitu metallography is taken and noted to be with pearlitic structure disintegration and dissolved carbides in matrix (at 500X). Refer pic.

 

We noted hardness in the range of 105-120 BHN which appears to be quite low against generally noted 160-180 BHN. Baseline reading is not available. Hardness measurement done with a portable machine having angle compensation.

 

Request to kindly guide me on how much minimum hardness is acceptable for P11 material for such critical service?

 

Regards,
Devang Majithia

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Re: [MW:32402] welder qualification

Qualify in 2G and 5G 

Range Qualification  become All position

On Mon, 31 May 2021, 08:29 Hany Nabil, <eng.hanynabil20@gmail.com> wrote:

Dear All,

It is known that the 6G position qualifies welder for all positions.

 If not possible to apply for a 6G position during WQT what are the two positions necessary to qualify a welder for all positions ?

 Best Regards,

 Eng. Hany Nabi

Welding Engineer

 Email: eng.hanynabil20@gmail.com

 Egypt Mobile: 002-01225622022

This message, including any attachments, may contain confidential and privileged information for the sole use of the intended recipient(s). Review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient, or authorised to receive information on behalf of the recipient, please contact the sender by reply email, and delete all copies of this message. While we have taken reasonable precautions to ensure that this message and any attachments are free from viruses, we cannot guarantee that they are virus free and accept no liability for any damage caused by this message or any attachments. Messages sent or received through our networks may be monitored to ensure compliance with the law, regulation and/or our policies.

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Re: [MW:32401] Weld Quality Inspection

0.7 x leg length

On Wednesday, April 14, 2021 at 12:45:05 PM UTC+8 gerry_tup@yahoo.com wrote:

For a Fillet weld, it is based on the Throat size and Leg size and the required profile as convex or concave as Applicable

Thanks & Regards

J.Gerald Jayakumar

On Wednesday, 14 April, 2021, 07:58:49 am IST, Harish Kannepalli <harishka...@gmail.com> wrote:

Hi,

    Please follow ISO 5817 for weld quality levels. However this has to be documented in your or end user SOP.

Regards,
Harish Kumar

On Wed, 14 Apr 2021, 07:55 Amit Singh, <ami...@gmail.com> wrote:

Dear Experts,

What is the acceptable weld bead reinforcement and allowable penetration in the GMAW welding process? Any specific code for structural welding. Please suggest.

Joint design- Fillet Type

Plate thickness- 8mm to 32mm

Material Grade- IS2062 E350C

Thank you in advance.

Regards,

Amit Singh

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Re: [MW:32400] welder qualification

2G & 5G

On Mon, May 31, 2021 at 8:29 AM Hany Nabil <eng.hanynabil20@gmail.com> wrote:

Dear All,

It is known that the 6G position qualifies welder for all positions.

 If not possible to apply for a 6G position during WQT what are the two positions necessary to qualify a welder for all positions ?

 Best Regards,

 Eng. Hany Nabi

Welding Engineer

 Email: eng.hanynabil20@gmail.com

 Egypt Mobile: 002-01225622022

This message, including any attachments, may contain confidential and privileged information for the sole use of the intended recipient(s). Review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient, or authorised to receive information on behalf of the recipient, please contact the sender by reply email, and delete all copies of this message. While we have taken reasonable precautions to ensure that this message and any attachments are free from viruses, we cannot guarantee that they are virus free and accept no liability for any damage caused by this message or any attachments. Messages sent or received through our networks may be monitored to ensure compliance with the law, regulation and/or our policies.

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Suresh Paidi

 

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[MW:32396] RE: 32392] LAS P11 minimum required hardness for operation

Hi Devang,

An operating temperature of 500-530 Deg C is fairly high for P11 steel. Though the design code provides the allowable stresses at that temperature I would say for that operating temperature range selection of   P22 steel would have been a better choice. In the context of the refineries 300 series is very common so as to have the thermal stability and desired machinal properties @ 500-530 Deg C, why it was not chosen ??

Having said those, the hardness values 100-125 BHN too low for these steels. As fabricated and PWHT-ed( if applicable) hardness readings of 150-180 HB would have been appropriate.

Materials degradations in the creep range can't be concluded by hardness reading alone. The following additional inspections are warranted:

• Signs of deformations , swellings on the lines
• Replications for Creep Cracks/damages.

You may find additional guideline in API 571.

Thanks.

 

Pradip Goswami.P.Eng, IWE.

Independent Consulting Welding & Metallurgical Engineering  Specialist

Saudi Aramco Approved Designated Project  Welding Engineer(DPWR)

Qatar Petroleum Approved, SME-Materials & Corrosion Engineering.

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

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

Cell/Whasapp:1-905-9793232

 

From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Devang Majithia
Sent: May 27, 2021 11:41 PM
To: materials-welding@googlegroups.com
Subject: [MW:32392] LAS P11 minimum required hardness for operation

 

Dear All,

Hope all are safe and doing good in this tough time.

 

36" LAS P11 steel is used in FCC Reactor O/H line with operating temperature of 500-530 Deg. C. Design temp. is 569 Deg. C. Creep temperature starts from 427 Deg. C as per API 571. Line in service for 10 yrs.

 

In situ metallography is taken and noted to be with pearlitic structure disintegration and dissolved carbides in matrix (at 500X). Refer pic.

 

We noted hardness in the range of 105-120 BHN which appears to be quite low against generally noted 160-180 BHN. Baseline reading is not available. Hardness measurement done with a portable machine having angle compensation.

 

Request to kindly guide me on how much minimum hardness is acceptable for P11 material for such critical service?

 

Regards,
Devang Majithia

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[MW:32395] RE: welder qualification

Please qualify separately in 2G and 5G to have the welder qualified for all positions.

 

Thanks.

 

 

Pradip Goswami.P.Eng, IWE.

Independent Consulting Welding & Metallurgical Engineering  Specialist

Saudi Aramco Approved Designated Project  Welding Engineer(DPWR)

Qatar Petroleum Approved, SME-Materials & Corrosion Engineering.

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

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

Cell/Whasapp:1-905-9793232

 

From: Hany Nabil <eng.hanynabil20@gmail.com>
Sent: May 30, 2021 3:15 AM
To: materials-welding@googlegroups.com
Subject: welder qualification

 

Dear All,

It is known that the 6G position qualifies welder for all positions.

 If not possible to apply for a 6G position during WQT what are the two positions necessary to qualify a welder for all positions ?

 

 

 Best Regards,

 

 Eng. Hany Nabi

Welding Engineer

 Email: eng.hanynabil20@gmail.com

 Egypt Mobile: 002-01225622022

 

This message, including any attachments, may contain confidential and privileged information for the sole use of the intended recipient(s). Review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient, or authorized to receive information on behalf of the recipient, please contact the sender by reply email, and delete all copies of this message. While we have taken reasonable precautions to ensure that this message and any attachments are free from viruses, we cannot guarantee that they are virus free and accept no liability for any damage caused by this message or any attachments. Messages sent or received through our networks may be monitored to ensure compliance with the law, regulation and/or our policies.

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[MW:32394] RE: Automatic welding machines for Pipeline Welding,

Hi,

Did you look at this manufacturer's website? Some information is as attached. There may be other manufacturer's also, which may be available through web search.

 

Thanks.

 

Pradip Goswami.P.Eng, IWE.

Independent Consulting Welding & Metallurgical Engineering  Specialist

Saudi Aramco Approved Designated Project  Welding Engineer(DPWR)

Qatar Petroleum Approved, SME-Materials & Corrosion Engineering.

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

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

Cell/Whasapp:1-905-9793232

 

 

Welding Machines | crc-evans.com

 

From: Lakshmanan Suresh Kumar <suresh18381@gmail.com>
Sent: May 30, 2021 1:25 AM
To: materials-welding@googlegroups.com
Subject: Automatic welding machines for Pipeline Welding

 

Gentlemen,

 

Can anyone suggest a suitable best quality automated / orbital welding machine for welding Pipeline girth Welds.

Requirements are.....

* Carbon Steel, Sour Service

* both offshore and onshore works

* open root with STT/CMT preferred

 

Thankyou

 

Regards

Suresh 

 

 

 

 

 

 

Virus-free. www.avg.com

[MW:32396] welder qualification

Dear All,

It is known that the 6G position qualifies welder for all positions.

 If not possible to apply for a 6G position during WQT what are the two positions necessary to qualify a welder for all positions ?

 Best Regards,

 Eng. Hany Nabi

Welding Engineer

 Email: eng.hanynabil20@gmail.com

 Egypt Mobile: 002-01225622022

This message, including any attachments, may contain confidential and privileged information for the sole use of the intended recipient(s). Review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient, or authorised to receive information on behalf of the recipient, please contact the sender by reply email, and delete all copies of this message. While we have taken reasonable precautions to ensure that this message and any attachments are free from viruses, we cannot guarantee that they are virus free and accept no liability for any damage caused by this message or any attachments. Messages sent or received through our networks may be monitored to ensure compliance with the law, regulation and/or our policies.

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[MW:32396] Automatic welding machines for Pipeline Welding

Gentlemen,

Can anyone suggest a suitable best quality automated / orbital welding machine for welding Pipeline girth Welds.

Requirements are.....

* Carbon Steel, Sour Service

* both offshore and onshore works

* open root with STT/CMT preferred

Thankyou

Regards

Suresh 

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Re: [MW:32396] Re: Black spots on DSS Weld Joints.

Try cleaning with an SS wire brush .. Followed by cleaning with solvent like acetone .Better to use chloride ( halide ) controlled acetone 

On Mon, 17 May 2021 at 09:15, rajesh...@gmail.com <rajeshreddy32@gmail.com> wrote:

Hi All,

We are also facing the same issue in SDSS welds on 6" Pipe welded with ER2594.

Can anybody let me know the root cause for this spots and remedy. 

On Wednesday, February 12, 2014 at 3:08:50 PM UTC+5:30 Vasantharao wrote:

Dear Experts,

We observe Dark spots on Welding of Duplex Stainless Welds.  

Material is : UNS S31803 ,  Filler Wire for root - ER2594, rest ER2209.

Sample pictures are attached for reference.

Oxygen level in shielding / Purging maintained well below 0.2%.

Interpass <150 Deg.C

Pl. share your valuable information.

Thank you.

P.Rao

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Re: [MW:32393] Re: Black spots on DSS Weld Joints.

you can use wire ss brush  rubbing immediately after welding completion & than as soon possible u can clean with Acetone to avoid this type spot   it will help you to prevent oxidation.

On Tue, May 18, 2021 at 2:31 PM GMT <gmt.lah@gmail.com> wrote:

Hello

you can also use "Weld Cleaning Gel" for cleaning

Best Regard 

GMT

On Mon, May 17, 2021 at 8:45 AM rajesh...@gmail.com <rajeshreddy32@gmail.com> wrote:

Hi All,

We are also facing the same issue in SDSS welds on 6" Pipe welded with ER2594.

Can anybody let me know the root cause for this spots and remedy. 

On Wednesday, February 12, 2014 at 3:08:50 PM UTC+5:30 Vasantharao wrote:

Dear Experts,

We observe Dark spots on Welding of Duplex Stainless Welds.  

Material is : UNS S31803 ,  Filler Wire for root - ER2594, rest ER2209.

Sample pictures are attached for reference.

Oxygen level in shielding / Purging maintained well below 0.2%.

Interpass <150 Deg.C

Pl. share your valuable information.

Thank you.

P.Rao

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[MW:32392] LAS P11 minimum required hardness for operation

Dear All,

Hope all are safe and doing good in this tough time.

36" LAS P11 steel is used in FCC Reactor O/H line with operating temperature of 500-530 Deg. C. Design temp. is 569 Deg. C. Creep temperature starts from 427 Deg. C as per API 571. Line in service for 10 yrs.

Insitu metallography is taken and noted to be with pearlitic structure disintegration and dissolved carbides in matrix (at 500X). Refer pic.

We noted hardness in the range of 105-120 BHN which appears to be quite low against generally noted 160-180 BHN. Baseline reading is not available. Hardness measurement done with a portable machine having angle compensation.

Request to kindly guide me on how much minimum hardness is acceptable for P11 material for such critical service?

Regards,
Devang Majithia

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Re: [MW:32391] welding guide for 4145H API-7

DEAR Sir, 

It is D&H Secheron make CNM Spl M product suitable for this welding. 

Thanks & Regards, 

www.dnhsecheron.com 

On Fri, May 21, 2021 at 8:22 AM Mohd Siraj <mohd52100@gmail.com> wrote:

gents,

pl advise welding of 4145H, thk-25mm dia-8"

Electrode selection,Preheat,PWHT...

with SMAW, or SMAW+GTAW

Mohd.

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Re: [MW:32390] PREHEAT TEMPERATURE

Preheat temp maximum restricted only in AWS D1.1 only

On Sun, May 23, 2021, 9:51 AM Ganesh Muthurajan <qceng.mg@gmail.com> wrote:

Mr. Manoj, 

Preheat requirements for P6 materials ( martensite stainless Steel). 

As per ASME 31.3 Table  330.1.1

State  the minimum requirement are 200. Deg. C. For all thickness. There is no additional  requirement. We should follow min 200 deg C minimum temperature.  

Ans the inter pass temperature is min 315 deg  C, 

Even your PQR is in ambient temperature.  

On Sat, 22 May 2021, 9:19 am Manoj Mumbai, <manojacgnr@gmail.com> wrote:

Dear Experts,

The preheat temperature shall not be less than 55 deg. C as per QW-406.1 but  not specified a maximum how much it can be from the temperature noted in PQR as preheat temperature is minimum temperature and interpass temperature is the maximum temperature.

My question , Is there any limitation to increase preheat temperature than mentioned in PQR. suppose PQR temperature is Ambient, say 38 deg. C, can we increase preheat temperature to 204 deg. C.  I have a qualified procedure of P6 material at ambient temperature 38 deg.C now I have to include preheat temperature.

Thanks in advance for your expert opinion.

Manoj.

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Re: [MW:32389] PREHEAT TEMPERATURE

Min and Max preheat temperatures are mentioned in ASME Sec II C also for certain consumables.

Regards

Prem Nautiyal 

On Sun, 23 May 2021, 09:14 Manoj Mumbai, <manojacgnr@gmail.com> wrote:

ASME B31.3 and RP582

On Sat, May 22, 2021 at 3:26 PM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:

Could you give code ref for control of preheat on maximum side

On Sat, May 22, 2021, 3:10 PM Gerry Lourens <Gerry.Lourens@newage-eng.com> wrote:

There are no limits to the Preheat temperature provided that there are no toughness requirements.

If toughness (impacts) are required :

the maximum inter-pass temperature qualified equals the maximum preheat temperature.

Best Regards,
	Gerry Lourens Welding Engineer New Age Engineering Solutions
	M: +27 62 192 1207 T:  +27 17 631 5282 F:  +27 (0)86 616 9701 E:  gerry.lourens@newage-eng.com A:  3 York Street, Evander, 2280

On Sat, May 22, 2021 at 5:49 AM Manoj Mumbai <manojacgnr@gmail.com> wrote:

Dear Experts,

The preheat temperature shall not be less than 55 deg. C as per QW-406.1 but  not specified a maximum how much it can be from the temperature noted in PQR as preheat temperature is minimum temperature and interpass temperature is the maximum temperature.

My question , Is there any limitation to increase preheat temperature than mentioned in PQR. suppose PQR temperature is Ambient, say 38 deg. C, can we increase preheat temperature to 204 deg. C.  I have a qualified procedure of P6 material at ambient temperature 38 deg.C now I have to include preheat temperature.

Thanks in advance for your expert opinion.

Manoj.

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Re: [MW:32386] PREHEAT TEMPERATURE

Could you give code ref for control of preheat on maximum side

On Sat, May 22, 2021, 3:10 PM Gerry Lourens <Gerry.Lourens@newage-eng.com> wrote:

There are no limits to the Preheat temperature provided that there are no toughness requirements.

If toughness (impacts) are required :

the maximum inter-pass temperature qualified equals the maximum preheat temperature.

Best Regards,
	Gerry Lourens Welding Engineer New Age Engineering Solutions
	M: +27 62 192 1207 T:  +27 17 631 5282 F:  +27 (0)86 616 9701 E:  gerry.lourens@newage-eng.com A:  3 York Street, Evander, 2280

On Sat, May 22, 2021 at 5:49 AM Manoj Mumbai <manojacgnr@gmail.com> wrote:

Dear Experts,

The preheat temperature shall not be less than 55 deg. C as per QW-406.1 but  not specified a maximum how much it can be from the temperature noted in PQR as preheat temperature is minimum temperature and interpass temperature is the maximum temperature.

My question , Is there any limitation to increase preheat temperature than mentioned in PQR. suppose PQR temperature is Ambient, say 38 deg. C, can we increase preheat temperature to 204 deg. C.  I have a qualified procedure of P6 material at ambient temperature 38 deg.C now I have to include preheat temperature.

Thanks in advance for your expert opinion.

Manoj.

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