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  • Users: KnaT
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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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 -...
  6. 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...
  7. KnaT

    Post Weld Heat Treatment of 4130 Material Casing Spool Body

    We have a Casing Spool Body of Material AISI 4130 on which we are to conduct welding repairs followed by PWHT. Our Client just restricted our Welding Procedure for carrying out the repair because it was approved for only 1 cycle PWHT. The PQR coupon was Post weld heat treated at 630 deg. C for...
  8. KnaT

    Post Weld Heat Treatment of 4130 Material Casing Spool Body

    We have a Casing Spool Body of Material AISI 4130 on which we are to conduct welding repairs followed by PWHT. Our Client just restricted our Welding Procedure for carrying out the repair because it was approved for only 1 cycle PWHT. The PQR coupon was Post weld heat treated at 630 deg. C for...
  9. KnaT

    WPS interchange between regional offices of the same company

    A company has its main workshop in one country and many regional workshops in other countries. The regional workshops are using the welding procedures that were qualified in the main workshop. The regional workshops have their own ISO and API certifications but the control system being followed...
  10. KnaT

    WPS interchange between regional offices of the same company

    A company has its main workshop in one country and many regional workshops in other countries. The regional workshops are using the welding procedures that were qualified in the main workshop. The regional workshops have their own ISO and API certifications but the control system being followed...
  11. KnaT

    WPS interchange between regional offices of the same company

    A company has its main workshop in one country and many regional workshops in other countries. The regional workshops are using the welding procedures that were qualified in the main workshop. The regional workshops have their own ISO and API certifications but the control system being followed...
  12. KnaT

    Radiographic requirements for Annular Plates

    Hey guys... This is with reference to API 650 8.1.2.9 We have a tank with annular plates which are single sided in design but welded without backing strip. (i.e. GTAW Root + SMAW Filling Capping.) Since the joint is neither a double welded joint nor a single welded joint with backing strip...
  13. KnaT

    Approximate RT Spot Calculator for API 650 Tanks

    Dear All, Attached is an Approximate RT Spot Calculator for API 650 Tanks for your reference. Your comments/feedback regarding the document will be highly appreciated. Haseeb
  14. KnaT

    Tank Bottom Flatness and Foundation Tolerances

    Hey Guyz! I have a few queries regarding Storage Tank Bottom Flatness and Foundation Inspection. I hope you'll be able to guide me. 1. Looking at Inspection methods and tolerances for tank dimensions in API 650, there is no direct tolerances defined for bottom flatness. There is a reference...

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