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  • Users: fakhfakh
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  1. fakhfakh

    Checking the strength of connection UG-41

    Dear All When checking the strength of reinforcement of connection elements (nozzle to shell/head), can some one explain why the calculation is based only on half the section? (For example: Strength of Nozzle wall shear = 3.14/2 .Dn.tn.S)
  2. fakhfakh

    Heat treatment of SA 240 310S

    Dear All, Ou client requires to perform heat treatment after the manufacturing of a pressure vessel to ASME VIII Div 1 Mtrl: SA 240 310S Thick: 26 to 28mm Welded The Code do not require neither prohibit a PWHT Normally such type of mterial needs a heat treatment to a temperature 1050-1100°C...
  3. fakhfakh

    Pitting corrosion

    Dear All, I've a doubt that pitting corrosion is applicable to carbon steel like SA516Gr70. Pitting corrosion is applicable to stainless steel. Carbon steel is subjected to surface corrosion Is this correct ?
  4. fakhfakh

    Objectives achievement

    Hello Accordng to ISO 9001 2015, what is required to do when planed objectves are not achieved?
  5. fakhfakh

    Hot forming of repad

    Dear All, Is it prohibited by ASME Section VIII Div1 that a repad be formed at a temperature 300 to 400°C ? This repad SA516Gr70 will reinforce an opening at the knuckle of the head of a pressure vessel. The complete PV will be subjected to PWHT per UCS-56
  6. fakhfakh

    API 650 Plate from coil

    Does the code API 650 accepts plates from coil in order to be used for shell manufacturing? If yes, in which condition ?
  7. fakhfakh

    ZeCor material welding

    I'm looking for the appropriate welding consumable for ZeCor-Z and ZeCor-310M plates welding having thickness 8mm. In addition is there any specific condition for preheating or PWHT? Welding process to be used: GTAW/FCAW or SAW Thank you
  8. fakhfakh

    PWHT requirment for SS 316L sour service

    Is it required to PWHT 316L plates as per MR 175 for sour service ?
  9. fakhfakh

    After weld holding time for NDT as per PD 5500

    Hello, Is there any paragraph in PD 5500 requiring to wait a lapse of time (12h or more) after weld completion in order to start NDT (UT, RT,...) ? Thanks
  10. fakhfakh

    PD 5500

    Hello, Do some one know whether PD 5500 accepts Automated ToFD and/or Phased arrays technique ? If yes, please specify the paragraph No Thanks
  11. fakhfakh

    Tensile as per ASME section 9

    For procedure qualification per ASME Section 9 and regarding the tensile acceptance criteria, why the code accepts 5% below the the minimum specified tensile strength of the base metal if the sample brakes out of the weld. Contrarely it tolerates not less than the minimum specified tensile...
  12. fakhfakh

    WPS qualification per ASME section 9

    The calculation for a pressure retaining item is based on material allowable stress which is related to the yield stress. Why do the WPS qualification as per ASME section 9 is concerned by the tensile strength and not the yield strength ?
  13. fakhfakh

    Adequacy of FCAW process

    Hello every body, For butt welding of material A283GrD thickness 22mm, we use FCAW process with E71T1-MJ filler metal with gas 20%CO2+80%Argon. UT is used for weld inspection and defects found are up to 3%. Based on what we heard about this process, I have a doubt about its adequacy even if the...
  14. fakhfakh

    Project Management theory

    Hello everybody, Can someone help me to find articles talking about Engineering Project Management (Project Management for constructions not for product development) Thank you in advance
  15. fakhfakh

    Welding process (SAW)

    Dear Sirs, I've performed a PQR with SAW process for butt weld joint of plate ASTM A 283 GrD thickness 25mm with root face 16mm with two single pass. Electrode used: SFA 5.17 F7A6-EM12K Dia. 4mm Results of tests OK Is it conventionnal to use the above joint design (with 16mm root face) for...
  16. fakhfakh

    Welding procedure

    Dear Sirs, Would you please inform me about the recommanded filler metal and any eventual preheat and/or PWHT for welding C45 steel bar with structural steel Fe 430b. (fillet weld) Thank you

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