Materials & Welding: August 2021

Tuesday, August 31, 2021

Re: [MW:32499] Cracking of Monel 400 TTS welds

Please advise shell and tube side services or share the data sheets to bitter advise the suitability of such dissimilar joint as other operating and design conditions shall be validated

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On Tue, Aug 31, 2021 at 5:58 AM, Jeya Prakash
<jeyaprakashjj@gmail.com> wrote:

Dear Experts,
Thank you all for the reply.

As an alternate option we are planning to change the tubes from Monel 400 to SA 789 S3750 Super duplex tube.

Kindly suggest the filler wire for welding this dissimilar joint.
Whether it is feasible to weld this dissimilar joint.

Thanks in Advance.

Regards,
Jeya Prakash. J

On Mon, Aug 30, 2021 at 4:07 PM Chiranjeevi A <chiranjeevipuvvula@gmail.com> wrote:
Dear Jeya,

It is due to high heat input

Regards
Anil

On Mon, Aug 30, 2021 at 9:42 AM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:
Dear Experts,
We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.
Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk
Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)
Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.
crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,
Jeya Prakash. J

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Re: [MW:32498] Cracking of Monel 400 TTS welds

Super duplex spec may be SA789 S32750

Filler wire ER 2509 or ER NiCrMo3

Heat input shall be within 0.5 to 1.5kj/mm

Interpass shall not exceed 100 deg celsius

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,

International Welding Engineer.

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Tue, Aug 31, 2021 at 9:21 AM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:

Dear Experts,
Thank you all for the reply.

As an alternate option we are planning to change the tubes from Monel 400 to SA 789 S3750 Super duplex tube.

Kindly suggest the filler wire for welding this dissimilar joint.
Whether it is feasible to weld this dissimilar joint.

Thanks in Advance.

Regards,
Jeya Prakash. J

On Mon, Aug 30, 2021 at 4:07 PM Chiranjeevi A <chiranjeevipuvvula@gmail.com> wrote:
Dear Jeya,

It is due to high heat input

Regards
Anil

On Mon, Aug 30, 2021 at 9:42 AM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:
Dear Experts,
We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.
Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk
Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)
Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.
crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,
Jeya Prakash. J

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Monday, August 30, 2021

Re: [MW:32497] Cracking of Monel 400 TTS welds

Dear Experts,

Thank you all for the reply.

As an alternate option we are planning to change the tubes from Monel 400 to SA 789 S3750 Super duplex tube.

Kindly suggest the filler wire for welding this dissimilar joint.

Whether it is feasible to weld this dissimilar joint.

Thanks in Advance.

Regards,

Jeya Prakash. J

On Mon, Aug 30, 2021 at 4:07 PM Chiranjeevi A <chiranjeevipuvvula@gmail.com> wrote:

Dear Jeya,

It is due to high heat input

Regards
Anil

On Mon, Aug 30, 2021 at 9:42 AM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:
Dear Experts,
We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.
Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk
Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)
Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.
crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,
Jeya Prakash. J

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Re: [MW:32496] Cracking of Monel 400 TTS welds

Dear friend ,

this may be related to high heat input especially the cracks location in photos mention the points of doubled heated times .

high temp. with Ni/Cu alloys make carbides precipitate easier leading to cracks also coarse grain size which increase with heat have more tendency to crack as precipitation area increase

Best Regards ,

AWS CWEng. Ahmed Osman

On Monday, August 30, 2021, 11:42:03 a.m. GMT+3, Jeya Prakash <jeyaprakashjj@gmail.com> wrote:

Dear Experts,

We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.

Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk

Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)

Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.

crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,

Jeya Prakash. J

Re: [MW:32495] Cracking of Monel 400 TTS welds

over heated

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,

International Welding Engineer.

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Mon, Aug 30, 2021 at 2:12 PM Jeya Prakash <jeyaprakashjj@gmail.com> wrote:

Dear Experts,
We are facing cracking issues during welding in Monel 400 Tube to Tubesheet Joints. Refer attached photographs.
Tube: SB-163 UNS-N04400; 25.0 mm OD x 2.0 mm thk
Tubesheets: SA-336M Gr F304L + SB-127 UNS-N04400 (48 + 10 mm thick clad)
Welding: ERNiCu-7 GTAW filler wire with Ar shielding gas.
crack locations: weld toe on tube side, tube ends.

Kindly share the reason for such cracking, and precautions required during Monel 400 welding.

Thanks in Advance.

Regards,
Jeya Prakash. J

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Friday, August 27, 2021

Re: [MW:32493] interpass temperature

Client specification always takes precedence and is mandatory.

For structural Application according to AWS D 1.1 gives the same requirement.

Maximum interpass temperature according to AWS D1.1 as mentioned in it based on Hardness value;

Please select based on the requirement.

Thanks & Regards

J.Gerald Jayakumar

On Monday, 23 August, 2021, 08:46:25 am IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

Thursday, August 26, 2021

Re: [MW:32490] interpass temperature

As per Aramco Standard SAES-W-11 the maximum interpass temperature for P1 material is 315 degree celsius, and P8 material is 177 degree celsius.

On Mon, Aug 23, 2021 at 6:10 AM Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

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Thanks & Regards

Mohammed Tajuddin

WELDING INSPECTOR CSWIP 3.1

Contact 0508780633

JUBAIL

Wednesday, August 25, 2021

Re: [MW:32489] Welder Qualification

API 1104 does allow for welder qualification of butt weld joint only by RT (API 6.6.1) it also allows welders to be qualified under ASME SEC. IX, which allows RT.

BUT, it depends on what they are being qualified to weld on. If they will be welding on natural gas facilities, they will be required to have been qualified by destructive testing. (Per CFR requirements).

Thanks,

Chip Frizzell

Price is what you pay-value is what you get.

Seldom does the lowest price result in the best value!

Sent from my iPhone

On Aug 25, 2021, at 1:46 AM, qaqcbarmer mech <qaqcbarmer@gmail.com> wrote:

Is it mandatory mechanical test qualification for welders as per API 1104

Qualification by RT is acceptable ?.

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[MW:32487] Welder Qualification

Is it mandatory mechanical test qualification for welders as per API 1104

Qualification by RT is acceptable ?.

Tuesday, August 24, 2021

Re: [MW:32486] Multi process PQR to Single Process WPS

Ref 5.2.2 may be useful

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,

International Welding Engineer.

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Tue, Aug 24, 2021 at 9:55 AM Manikandan J <mechmani22@gmail.com> wrote:

Hello Experts,

I have existing PQR having combination of GTAW+FCAW process as per AWS D1.1-2015 Edn.

Can I write the WPS by using only FCAW process?

There is no clause in AWS D1.1?

Expecting your response with clause reference.

Regards,
Manikandan.
India.

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Monday, August 23, 2021

Re: [MW:32480] interpass temperature

Just to add,

Your PQR temperature is 290 and according to ASME Sec.iX it can be increased to 345max in the WPS if Charpy Impact test is Applicable else even more.

Thanks & Regards

J.Gerald Jayakumar

On Monday, 23 August, 2021, 08:46:25 am IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

Re: [MW:32480] interpass temperature

Interpass temperature is the temperature measured after welding of each pass. (please refer for definition of each pass in welding). Normally before you start welding you apply PREHEAT and this becomes the minimum Preheat temperature and after start of welding due to the high Arc temperature the welding heat will be conducted and after completion of one pass say for example Root pass one shall measure the temperature on the weld bead(root bead). Like wise for each pass the interpass temperature shall be measured. Welding shall be performed for all passes between minimum Preheat Temperature and maximum Interpass temperature measured at the start of each pass. Interpass temperature is measured after completion of one pass and whereas welding preheat during welding shall never be less than minimum preheat temperature.

Effect of Interpass temperature on Carbon steel.

1. Higher the Interpass temperature, then slower the weld cooling rate which inturn results in Higher Grain size in the finished bead/weld and lesser the Charpy Impact values.

2. According to ASME Sec.IX, increase in Interpass temperature higher than 55degC than the PQR will be considered an Supplementary Essential variable and requires new qualification of PQR. Any changes in the maximum Interpass temperature within 55degC (PQR) shall be revised in the WPS.

3. Your case 290degC is well within the maximum Interpass temperature of 340degC mentioned in the WPS and so there is no issue.

Thanks & Regards

J.Gerald Jayakumar

On Monday, 23 August, 2021, 08:46:25 am IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

Re: [MW:32480] interpass temperature

Dear Rameez khan RK,

Interpass temperature is generally mentioned as MAXIMUM.

Hence Approved PQR interpass temp. is 290 but in WPS its mention 340 c is acceptable.

Please note that code has specifically mentioned as important criteria when impact test is essential in application.

It is a delicate balance between time & temperature for preheat, post heat cooling rate, Thickness, Heat Input, Ambient Conditions & Heat Transfer.

The WPS & PQR is the basis of the starting point for establishing design requirements. At times simulations tests are carried out to ensure & impose limit on preheat, interpass temperature control & PWHT requirement to regain requisite material properties in as delivered conditions of final equipment / structures. Hence it is a designer driven MOC & welding technology fulfillment to achieve desired end results.

The application can vary from structure, Pressure vessels, aero, nuclear, defense & rocket to several others using welding as technology.

The result of interpass is measured by Final Hardness in parent material, HAZ & weld metal as per specified by designer.

Attached please find extract of general theory regarding understanding of interpass temperature requirement.

Best Regards,
C.B.KAPADIA

On Monday, 23 August, 2021, 08:40:38 am IST, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

Re: [MW:32480] interpass temperature

Interpass temperature is defined in QW/QB-492. Measurement of it can be made using Temperature indicating crayons, contact or infrared pyrometers, etc. It need not be measured during procedure qualification or recorded on the PQR unless impact testing is required. It is also an essential variable fpr Weld Overlay qualification.

Gene Matsko

On Sunday, August 22, 2021, 10:10:40 PM CDT, Rameez khan RK <rk.rameezkhan21@gmail.com> wrote:

Hello Experts,

Can any one tell me about interpass temperature for carbon steel pipe as [per code and standards.

WE facing one issue here our Approved PQR interpass temp. is 290 but in WPS its mention 340 c so please defined and what is actually interpass temp as per codes per standards.

thank you

Saturday, August 21, 2021

[MW:32478] Re: TKY Weld joint circumferential length

i have an excel file where you able to calculate weld length for TKY joint...ahmadfikrilkhairi@gmail.com...email me at here

On Friday, August 21, 2020 at 4:34:27 PM UTC+8 SANTOSH K wrote:

Dear Experts,

Can anyone share formula or any method to calculate weld length for TKY joint (Jackets) circumferential length

Thank you

Best Regards
Hema santosh.

Wednesday, August 18, 2021

Re: [MW:32474] qualified base metal thickness range in WPS as per ASME sec ix -reg

Dear Mr. Pandiyan

please find below attached for without Impact test.(5-200mm) QW451.1

for impact tested range will be also same see below attached detail QW403.6

Thanks & Regards

Sangramkeshari Routaray
Zeeco India,

Cswip3.1, NDT level-II (UT,RT,MT & PT)

ISO Lead Auditor 9001:2015

MOB NO. +91-8249921885

On Wednesday, August 18, 2021, 08:54:14 AM GMT+5:30, Raja <krajapandiyan@gmail.com> wrote:

Dear sir,

pl refer the details,

Base metal Thk is 50mm, and P-Number is 15E (Gr.91 material)

On Monday, August 16, 2021 at 5:10:35 PM UTC+5:30 sangram routray wrote:

Dear Mr. Pandiyan

please Mention the thickness of PQR.
Accordingly any one can say you MIN & MAX limit.
for Impact test Follow QW 403.6

Thanks & Regards

Sangramkeshari Routaray
Zeeco India,
Cswip3.1, NDT level-II (UT,RT,MT & PT)
ISO Lead Auditor 9001:2015
MOB NO. +91-8249921885

On Monday, August 16, 2021, 09:10:38 AM GMT+5:30, Raja <krajap...@gmail.com> wrote:

i have some doubts in WPS, if possible kindly clarify me

1) If PQR is done with Normalization heat treatment (PWHT done above the upper critical temperature), what is the qualified base metal thickness range to be taken ( min to max ) any special condition applicable in ASME Sec IX?

2) When Impact test is applicable to the WPS, then what is the qualified base metal thickness range to be taken ( min to max ). any special condition in ASME Sec IX?

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Monday, August 16, 2021

Re: [MW:32470] qualified base metal thickness range in WPS as per ASME sec ix -reg

Dear Mr. Pandiyan

please Mention the thickness of PQR.

Accordingly any one can say you MIN & MAX limit.

for Impact test Follow QW 403.6

Thanks & Regards

Sangramkeshari Routaray
Zeeco India,

Cswip3.1, NDT level-II (UT,RT,MT & PT)

ISO Lead Auditor 9001:2015

MOB NO. +91-8249921885

On Monday, August 16, 2021, 09:10:38 AM GMT+5:30, Raja <krajapandiyan@gmail.com> wrote:

i have some doubts in WPS, if possible kindly clarify me

1) If PQR is done with Normalization heat treatment (PWHT done above the upper critical temperature), what is the qualified base metal thickness range to be taken ( min to max ) any special condition applicable in ASME Sec IX?

2) When Impact test is applicable to the WPS, then what is the qualified base metal thickness range to be taken ( min to max ). any special condition in ASME Sec IX?

Re: [MW:32469] qualified base metal thickness range in WPS as per ASME sec ix -reg

Let us know what is P NO of PQR ?

On Mon, 16 Aug 2021, 08:46 Raja, <krajapandiyan@gmail.com> wrote:

i have some doubts in WPS, if possible kindly clarify me

1) If PQR is done with Normalization heat treatment (PWHT done above the upper critical temperature), what is the qualified base metal thickness range to be taken ( min to max ) any special condition applicable in ASME Sec IX?

2) When Impact test is applicable to the WPS, then what is the qualified base metal thickness range to be taken ( min to max ). any special condition in ASME Sec IX?

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Wednesday, August 11, 2021

Re: [MW:32466] API 650 - 8.1.2.2 The following requirements apply to vertical joints

The lowest section is of thickness 16mm and shall comply with the requirement of (b) (spot radiography requirements)and the remaining with less than 10mm shell thickness shall follow (a) as per figure below. Considering the lowest shell of 16mm is one course the radiography requirement of intersections shall follow (a)

Thanks & Regards

J.Gerald Jayakumar

On Wednesday, 11 August, 2021, 08:46:19 am IST, Isac Passaura <isac.passaura@gmail.com> wrote:

Dear Experts,

I have a doubt about API 650 - 8.1.2.2 a) and b), when it says:

"For butt-welded joints in which the thinner shell plate is less than or equal to 10 mm"

does this apply to the entire shell? For example in the figure below, do I consider the entire shell in item a)?

Many thanks.

Best Regards

Isac Passaura

Materials & Welding

Tuesday, August 31, 2021

Re: [MW:32499] Cracking of Monel 400 TTS welds

Re: [MW:32498] Cracking of Monel 400 TTS welds

Monday, August 30, 2021

Re: [MW:32497] Cracking of Monel 400 TTS welds

Re: [MW:32496] Cracking of Monel 400 TTS welds

Re: [MW:32495] Cracking of Monel 400 TTS welds

Friday, August 27, 2021

Re: [MW:32493] interpass temperature

Thursday, August 26, 2021

Re: [MW:32490] interpass temperature

Wednesday, August 25, 2021

Re: [MW:32489] Welder Qualification

[MW:32487] Welder Qualification

Tuesday, August 24, 2021

Re: [MW:32486] Multi process PQR to Single Process WPS

Monday, August 23, 2021

Re: [MW:32480] interpass temperature

Re: [MW:32480] interpass temperature

Re: [MW:32480] interpass temperature

Re: [MW:32480] interpass temperature

Saturday, August 21, 2021

[MW:32478] Re: TKY Weld joint circumferential length

Wednesday, August 18, 2021

Re: [MW:32474] qualified base metal thickness range in WPS as per ASME sec ix -reg

Monday, August 16, 2021

Re: [MW:32470] qualified base metal thickness range in WPS as per ASME sec ix -reg

Re: [MW:32469] qualified base metal thickness range in WPS as per ASME sec ix -reg

Wednesday, August 11, 2021

Re: [MW:32466] API 650 - 8.1.2.2 The following requirements apply to vertical joints

[MW:34916] Applicability of Impact requirement as per ASME B31.3

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