Materials & Welding

Dear Sirs, As per ASME B31.3 clause no.341.3.1(a) mentioned P Nos.3,4,5A,5B,5C AND 15 materials examination(RT/UT) shall be performed after completion of heat treatment. But no information for P1 material whether NDT performed before or after PWHT. Please advise can we perform NDT(RT/UT) before PWHT activity for P1(NACE/H2 service) material or not. Regards, Ranajit Chatterjee 9995018265 -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/1766993169.S.607.21315.f5mail-224-227.rediffmail.com.1766993764.7778%40webmail.rediffmail.com .

Hi, For H2 service you have to NDT RT/UT after PWHT. Better to do hardens also. On Mon, 29 Dec 2025, 10:39 am 'ranajit chatterjee' via Materials & Welding, < materials-welding@googlegroups.com > wrote: Dear Sirs, As per ASME B31.3 clause no.341.3.1(a) mentioned P Nos.3,4,5A,5B,5C AND 15 materials examination(RT/UT) shall be performed after completion of heat treatment. But no information for P1 material whether NDT performed before or after PWHT. Please advise can we perform NDT(RT/UT) before PWHT activity for P1(NACE/H2 service) material or not. Regards, Ranajit Chatterjee 9995018265 -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this dis...

Just to share. As per ASME B31.3, PWHT is not mandatory for P! material provided certain conditions are fulfilled and not considered a service requirement. If it is a service requirement it is preferable to perform UT before PWHT & RT after PWHT since repair welds need PWHT if PWHT is a service requirement.. If it is ASME Sec.VIII Div.I, for P1 material as per UCS-56 Repairs are permitted after PWHT. Snap shot below. Thanks & Regards J.Gerald Jayakumar 0091-8838619635 On Monday, 29 December 2025 at 01:09:24 pm IST, 'ranajit chatterjee' via Materials & Welding <materials-welding@googlegroups.com> wrote: Dear Sirs, As per ASME B31.3 clause no.341.3.1(a) mentioned P Nos.3,4,5A,5B,5C AND 15 materials examination(RT/UT) shall be performed...

Just be specific to question. 1. NACE MR0175 do not require mandatory PWHT unless Hardness requirements are met. 2. NACE MR0103 for Refinery sour service & associated NACE SP0472 for environmental cracking do not mandate PWHT for sour service snap shot below. 2. For H2 service PWHT is not a mandatory requirement as material selection are governed by Nelson curves (API 941). PWHT for P1 material is optional and though if performed for P1 material due to service requirement (as dictated in the specification), UT/RT after PWHT is recommended for mainly Repair occurring after PWHT . Thanks & Regards J.Gerald Jayakumar 0091-8838619635 On Monday, 29 December 2025 at 01:09:24 pm IST, 'ranajit chatterjee' via Materials & Welding <materials-welding@googlegroups.com> wrote: ...

Dear Mr. Anthony, Black soot on Aluminized Mild Steel (ALMS) during MIG welding is a  very common issue, and it  typically indicates  that the Aluminium coating  is burning off and oxidizing not necessarily a weld  defect, but rather a process/parameter  & shielding issue. The soot is due to the vaporization  of the  Aluminium-Silicon coating and oxidation promotion due to  CO 2 .  So, reduce the CO 2 content. Try  92% Ar/8% CO ₂ (best balance) or  95% Ar/5% CO ₂ (almost no soot & very  clean arc). 98% Ar/2%  CO ₂  is the cleanest but may affect the weld bead finish. Further, for your 125A selection, 29.50V is too high and increases the heat input, and  the  vaporization  and tend to distort. The ideal  Voltage is between 20 to 22V. It will also help to reduce  the spatter  level.  Pulsed  MIG (if your power  source supports Pulse) with a lower average heat  input  gives cleaner  results  on ALMS. 12 LPM is on the borderline  for a  coated sheet, and increase ...

As per Sec IX QW 202.4 (b) (2) Dissimilar base metal  PQR base metal thickness minimum 38mm required to get unlimited thickness. 69.8 mm here max range WPS 5mm to 76mm required. On Mon, 15 Dec 2025, 10:51 am kavin murugam, < kavin.murugam@gmail.com > wrote: Dear DV Reddy, T = base metal thickness t = weld metal thickness Did you WPS covers both thicknesses ? Thank you & Stay Safe!   KAVIN MURUGAM +60126159644 On Mon, Dec 15, 2025 at 3:44 PM venkateswara reddy Desireddy < dvreddy82@gmail.com > wrote: Dear friend, Nozzle thickness 20.4mm, so your WPS thicknes must be cover 20.4mm. 20mm thick WPS not suitable to use, because 0.4 mm less thick . Heat treatment is essential variable for WPS. If you use with heat treatment WPS, you have to do heart treatment to job also. Regards  D.V.Reddy. On Mon, 15 Dec 2025, 9:14 am Shivasankar A, < shivasankar2593@gmail.com > wrote: Hi Friends, Refer the attached image, In this, The cover flange thickness is 69.8 mm & The Nozzle...

Based on your advises, If i have a WPS with 6mm thickness in P.No 08, it allows to weld any thickness (from 1.5mm onwards) of P.No 8 materials Even in Dissimilar base material thickness Joints too. is my understanding is right? On Monday, December 15, 2025 at 4:08:04 PM UTC+5:30 venkateswara reddy Desireddy wrote: As per Sec IX QW 202.4 (b) (2) Dissimilar base metal  PQR base metal thickness minimum 38mm required to get unlimited thickness. 69.8 mm here max range WPS 5mm to 76mm required. On Mon, 15 Dec 2025, 10:51 am kavin murugam, < kavin....@gmail.com > wrote: Dear DV Reddy, T = base metal thickness t = weld metal thickness Did you WPS covers both thicknesses ? Thank you & Stay Safe!   KAVIN MURUGAM +60126159644 On Mon, Dec 15, 2025 at 3:44 PM venkateswara reddy Desireddy < dvre...@gmail.com > wrote: Dear friend, Nozzle thickness 20.4mm, so your WPS thicknes must be cover 20.4mm. 20mm thick WPS not suitable to use, because 0.4 mm less thick . Heat treatment is essent...

Yes you can weld any dissimilar thickness on p no. 8 of you have 6mm qualified PQR. Lower limit has to cover upper limit is sufficient even if you have a 6mm qualified PQR.  On Mon, 15 Dec 2025, 3:36 pm Shivasankar A, < shivasankar2593@gmail.com > wrote: Based on your advises, If i have a WPS with 6mm thickness in P.No 08, it allows to weld any thickness (from 1.5mm onwards) of P.No 8 materials Even in Dissimilar base material thickness Joints too. is my understanding is right? On Monday, December 15, 2025 at 4:08:04 PM UTC+5:30 venkateswara reddy Desireddy wrote: As per Sec IX QW 202.4 (b) (2) Dissimilar base metal  PQR base metal thickness minimum 38mm required to get unlimited thickness. 69.8 mm here max range WPS 5mm to 76mm required. On Mon, 15 Dec 2025, 10:51 am kavin murugam, < kavin....@gmail.com > wrote: Dear DV Reddy, T = base metal thickness t = weld metal thickness Did you WPS covers both thicknesses ? Thank you & Stay Safe!   KAVIN MURUGAM +60126159644 On M...

Can we use Duplex WPS for Super Duplex, kindly quote with the help of code Thanks -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/ee5dcbf4-b6cb-4421-8338-04e109d45b15n%40googlegroups.com .

Sir,  Not using .because filler,interpass temp.,etc are not same.DSS.  DSS. ER2209  SDSS ER2594    Thanks and regards,      S.KARUNAKARAN,         karunaqc@gmail.com       91-6382279754        On Mon, 15 Dec 2025, 16:29 Alex Kumar Antony, < alexkantony@gmail.com > wrote: Can we use Duplex WPS for Super Duplex, kindly quote with the help of code Thanks -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/ee5dcbf4-b6cb-4421-8338-04e109d45b15n%40googlegroups.com . -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you ar...

As per ASME Section IX, the use of SDSS filler wire is permitted even when impact testing is not specified or required, provided the essential variables are met. However, beyond the code requirements, from a metallurgical and performance standpoint, DSS and SDSS differ significantly in their ferrite-austenite phase balance requirements. Achieving the correct phase balance is critical and is strongly influenced by welding heat input. SDSS, in particular, has a higher PREN (Pitting Resistance Equivalent Number) requirement compared to DSS. To achieve the required PREN and phase balance in SDSS weld metal, nitrogen is commonly added to the shielding and backing gas. Nitrogen is a strong austenite stabilizer and also contributes to an increase in PREN, thereby improving corrosion resistance. If a WPS is qualified for DSS using pure argon as the shielding gas, and it is later proposed to use an argon–nitrogen mixture (for Eg: Ar + 2% N₂) for SDSS welding, this change would require requalifi...

As per ASME Section IX – QW-403.5: No, a change from one Group Number to another Group Number within the same P-Number shall be considered an essential variable and requires requalification of the WPS. On Mon, 15 Dec 2025, 16:29 Alex Kumar Antony, < alexkantony@gmail.com > wrote: Can we use Duplex WPS for Super Duplex, kindly quote with the help of code Thanks -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/ee5dcbf4-b6cb-4421-8338-04e109d45b15n%40googlegroups.com . -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message becau...

yes, provided that you have revised drawing. On Monday, December 15, 2025 at 4:29:07 PM UTC+3 Alex Kumar Antony wrote: Can we use Duplex WPS for Super Duplex, kindly quote with the help of code Thanks -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com . To view this discussion visit https://groups.google.com/d/msgid/materials-welding/c8d57c10-cfd4-4bca-8bed-493fc3badc51n%40googlegroups.com .

if you want to use WPS up to 20mm, machined 0.4mm of nozzle. as nozzle always have excess thickness 0.8-1mm. however your joint is 69.8 and 20mm so you must have wps qualified up to 69.8mm. whats a nozzle dia, if inside welding possible, make double v groove  as per asme b16.25. On Monday, December 15, 2025 at 9:14:44 AM UTC+3 Shivasankar A wrote: Hi Friends, Refer the attached image, In this, The cover flange thickness is 69.8 mm & The Nozzle thickness is 20.4 mm.  the Nozzle is Set on on the Cover Flange with Full penetration Weld the groove is given on the Nozzle pipe. The Final Fillet weld Size is 15 mm. So may i use the WPS which Covers the thickness range from 1.5 to 20 mm? If not, Kindly explain why? Also Tell me the WPS Qualified with Heat treatment can be weld for the Job without Heat Treatment? Looking for your valuable Replies. Kindly Support. regards, A.Shivasankar -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You ...

Yes P8 with dissimilar material thickness 6mm PQR thickness is enough to weld max thickness. On Mon, 15 Dec 2025, 2:36 pm Shivasankar A, < shivasankar2593@gmail.com > wrote: Based on your advises, If i have a WPS with 6mm thickness in P.No 08, it allows to weld any thickness (from 1.5mm onwards) of P.No 8 materials Even in Dissimilar base material thickness Joints too. is my understanding is right? On Monday, December 15, 2025 at 4:08:04 PM UTC+5:30 venkateswara reddy Desireddy wrote: As per Sec IX QW 202.4 (b) (2) Dissimilar base metal  PQR base metal thickness minimum 38mm required to get unlimited thickness. 69.8 mm here max range WPS 5mm to 76mm required. On Mon, 15 Dec 2025, 10:51 am kavin murugam, < kavin....@gmail.com > wrote: Dear DV Reddy, T = base metal thickness t = weld metal thickness Did you WPS covers both thicknesses ? Thank you & Stay Safe!   KAVIN MURUGAM +60126159644 On Mon, Dec 15, 2025 at 3:44 PM venkateswara reddy Desireddy < dvre...@gmail.com ...