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  • Users: KnaT
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  1. KnaT

    Post Weld Heat Treatment Times and Cycles (Urgent Help Required)

    Thanks Jbeckhou. It is very informative and has clarified a few of my concerns but now I am feeling that none of my vendor's procedures are qualifying these requirements. If you use the 1 hour per inch convention, a standard spacer spool will only require around 1.5 hour PWHT soak time. Making...
  2. KnaT

    Post Weld Heat Treatment Times and Cycles (Urgent Help Required)

    Thanks Cloa. You are right, it only allows you to read it online. Jabeckhou: Could you please send us a pdf of this specification? I will really appreciate that.
  3. KnaT

    API 6A Monogramming on partly non standard equipments

    I am sorry, I can't provide the picture. It is piece of 5 inch dia pipe with few outlets on top, bottom and sides. All outlets are API Monogrammed Flanges. All the flange to pipe joints were proposed by Client. Volumetric NDE was possible for only side flange to pipe weld joints. Top and bottom...
  4. KnaT

    API 6A Monogramming on partly non standard equipments

    A Standard API Flanges are attached to a non-standard parts(designed by customer)to make an equipment. All inspection for flanges and the non standard equipment parts done as per API 6A, PSL 3 apart from one exception: API Flange to customer designed part weld joint cannot under go volumetric...
  5. KnaT

    AWS D1.1 Equivalent steels

    I agree with the above comments. The best and easiest way out of it is that you weld coupons using the materials and pre-qualified WPS that you have used. Get them tested as per AWS D 1.1 and present the results to your Client. I believe he will then ask you to use the information to develop...
  6. KnaT

    Post Weld Heat Treatment Times and Cycles (Urgent Help Required)

    API 6A is putting a restriction on deviation from the WPS but it is not putting any restriction on the WPS itself. This will give a little more "flexibility" when more than one welding procedures are involved. I have seen cases where the temperature ranges on two different welding procedures do...
  7. KnaT

    Post Weld Heat Treatment Times and Cycles (Urgent Help Required)

    The construction Code is API 6A which unclear about the PWHT. It just says that manufacturer has to perform the PWHT as per the qualified WPS. Yes, the WPS was qualified with impact testing. My apologies, it was not a coupon. This was a production weld which was repaired by them.
  8. KnaT

    Post Weld Heat Treatment Times and Cycles (Urgent Help Required)

    Hi This is long case but I will really appreciate your expert opinion on this. I have was going through a vendor PQR with following details: Applicable standards: API 6A, NACE MR 0175, ASME IX Material AISI 4130 Quench Tempered, 75k YS, 38mm thick Process: SMAW Consumable: E7016 (root) E10018...
  9. KnaT

    ASME IX QW 200.4 (b) and PWHT in WPS

    Hi I wish to merge to two PQRs using ASME IX QW 200.4 reference. PQR1: GTAW+SAW Process P1 Gr 2 welded to AISI 4130 Test coupon Thickness: 42mm PWHT 635 +-10 deg. C for 4 hours PQR2: SMAW Process P1 Gr 1 welded to AISI 4130 Test coupon thickness: 25.4mm PWHT 635 +-10 Deg. C for 4 hours I...
  10. KnaT

    Qualification of WPS

    Hi Elyaas, What I understood from question: You already have a WPS with supporting PQRs which is for Inconel overlay welding. The process used in the overlay welding is SMAW + SAW. You now want to qualify a new procedure for cold weld repair using GTAW Process. As clarified by others, you need...
  11. KnaT

    4130 with SS E316L-17 Overlay without PWHT?

    Metengr I got the hardness test results of the PQR. Hardness values in the HAZ are ranging from HV 301 to 246 (Avg. HV 271).
  12. KnaT

    API 6A, Material Qualification to Temperature Class X

    Hi Guys, I have several sizes of square blocks and round bars which I want to use for the production of API 6A Flanges and Blocks. The original MTC does not qualify the material for elevated temperature use. I want to use these raw materials for the manufacturing parts which comply to...
  13. KnaT

    4130 with SS E316L-17 Overlay without PWHT?

    jbeckhou - I did not see a specific clause in API 6A stating that PWHT was mandatory. It just says that it should be as per WPS. I understand that it is recommended for 4130 but if we can qualify a WPS with the desired mechanical properties shouldn't that suffice our purpose? Even without PWHT...
  14. KnaT

    SS Overlay on 4130 Steels

    here is the link to the other thread: http://www.eng-tips.com/viewthread.cfm?qid=334063
  15. KnaT

    SS Overlay on 4130 Steels

    Thanks a lot Metengr. I have noted all of your answers. I have gone through our database for Overlay Procedures, none of which specify E309 butter layer. I have posted another thread with the exact details of Base Material and Preheat, Interpass Temperatures etc. I will appreciate it if you...
  16. KnaT

    4130 with SS E316L-17 Overlay without PWHT?

    Hi Guys, We are planning to qualify an Overlay welding procedure for: AISI 4130 Forged Block cut to 1 inch thk. plate, 75 Ksi min. YS and 95 Ksi min. TS, C 0.3%, Cr. 0.99%, Mn 0.52% and Mo 0.17% with following Heat Treatment done by mill: Normalizing - 900 Deg. C, 9 hours, Quenching in Water -...
  17. KnaT

    Post Weld Heat Treatment of 4130 Material Casing Spool Body

    Does that mean that we can omit the PWHT altogether if are able to Qualify a welding procedure without it?
  18. KnaT

    SS Overlay on 4130 Steels

    Guys, I want to qualify a new ASME IX procedure for Corrosion Resistant Overlay Welding on AISI 4130(75 Ksi Y.S Min / 95 Ksi Min T.S)base metal using E316L-17 electrodes without using PWHT (Stress Relieving). Question 1:From the equivalents that I have seen, AISI 4130 steels are said to be...
  19. KnaT

    Post Weld Heat Treatment of 4130 Material Casing Spool Body

    I agree that manufacturer has to provide the PWHT requirements but there should be some standard or reference for the manufacturers to follow. Don't you think so?
  20. KnaT

    Post Weld Heat Treatment of 4130 Material Casing Spool Body

    I'm sorry for the duplicate post. I wasn't sure which forum to post on. Thank you for the prompt response. I know that it is roughly 1 hour per inch but I am looking for a specific Code reference for Casing Spool Body of Material AISI 4130 being manufactured as per API 6A. I've been reading...

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