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  1. Muhammad Ijaz

    Availability of 3mm thick As rolled ASTM A516 70 plate normalized and impact tested

    Please share the European steel manufacturer who can manufacture A516 70 plate with following; As rolled 3 mm thick Normalized Impact tested Regards, Ijaz
  2. Muhammad Ijaz

    How to caclulate section modulus of well all around I beam

    Please share formula for weld all around I beam.
  3. Muhammad Ijaz

    How to caclulate section modulus of well all around I beam

    Dear Sir, Please share calculation procedure to determine section modulus of weld all around I beam (e.g. W10x49). Regards, Ijaz
  4. Muhammad Ijaz

    Ad merkblatter calculation of tubesheet of DEU exchanger

    Dear all, Please share detailed calculations for tubesheet of DEU exchanger based on AD Markblatter code. This is required to understand the philosophy as i am not using this code frequently. Regards, Ijaz
  5. Muhammad Ijaz

    AD Merkblatter calculations for tubesheet of DEU exchanger

    Dear all, Please share detailed calculations for tubesheet of DEU exchanger based on AD Markblatter code. This is required to understand the philosophy as i am not using this code frequently. Regatds, Ijaz
  6. Muhammad Ijaz

    Patch plate load per para 207-3.5 of ASME PCC 2 -2018

    Dear Sir, Para 207-3.5 of ASME PCC 2-2018 states that "Plug/slot welds may be designed to take up to 30% of the patch plate load.". Please explain how "Patch plate load" shall be calculated as i could not find the formula to determine patch plate load in ASME PCC 2. Regards, Ijaz
  7. Muhammad Ijaz

    We want to design a blank for 6inch

    We want to design a blank for 6inch carbon steel (API 5L B) piping. Design pressure is 25kg/cm2g and design temp are 74 deg C and minus 10 deg C. Flange is 6"-300# A105 WN RF and gasket id is 168.3mm. Available material is A285C 15 mm thk plate. For given design conditions, min thickness of...
  8. Muhammad Ijaz

    A 285C material as Blank

    We want to design a blank for 6inch carbon steel (API 5L B) piping. Design pressure is 25kg/cm2g and design temp are 74 deg C and minus 10 deg C. Flange is 6"-300# A105 WN RF and gasket id is 168.3mm. Available material is A285C 15 mm thk plate. For given design conditions, min thickness of...
  9. Muhammad Ijaz

    Over tolerance thickness of AATM A537 and ASTM A516

    What will be overtolerance on thickness of 3mm thick sheets of ASTM A537 and ASTM A516? Regards, Ijaz
  10. Muhammad Ijaz

    Welding of SS patches on CS roof of Ammonia storage tank based on API 620 R.

    Thank you for your responses. @MJCronin We try to find quote of 3mm thk A 537 Cl1 plates but no vendor gave offer. @mk3223 It is out of service for 25 years. Now we want to take in operation. Corrosion is mainly due to CUI. 1. Whats wrong to use SS316 on CS roof other than galvanic corrosion...
  11. Muhammad Ijaz

    Welding of SS patches on CS roof of Ammonia storage tank based on API 620 R.

    Dear All, We have an Ammonia storage tank designed on API 620 R. Material of construction for roof, shell and bottom is ASTM A 573 Cl.1 (CS). Min metal design temperature is minus (-)45 deg C and operating temperature is minus (-)33 deg C. Inspection of roof is done and it is badly corroded...
  12. Muhammad Ijaz

    Calculation for supported roof of tank based on API 620 Appendix R

    A tank (designed on API 620 Appendix R) has roof with supporting structure as shown in attachment. In appendix F of API 620, there is sample calculation of self supporting roof but no calculation available for roof with supporting structure. Please share reference/guidelines of calculation to be...
  13. Muhammad Ijaz

    API 620 Seismic Calculations

    We have a tank with 8 shell courses (SCs). 04 SCs (from bottom to top) are of different thicknesses (i.e. 11.3, 10.1, 8.8 and 7.6mm) and thickness of remaining top 04 SCs is 7.4 mm. My questions is: In API 650 Annex-E para E.6.2.2.2, maximum longitudinal shell compression stress (Sc) shall be...
  14. Muhammad Ijaz

    API 620 Seismic Calculations

    Please share step by step seismic calculations of tank per API 620. Regards, Ijaz
  15. Muhammad Ijaz

    Pressure calculations for NPT threads

    Dear Sir, 1" NPT threaded carbon steel elbows (3000#) and piping are installed at downstream of control valve drain. Service is hot compressed air (P = 7.5 bar and Temp = 350 deg C). Control valve is passing. Now it is required to install NPT valve at open end (drain end) of piping to contain...
  16. Muhammad Ijaz

    Clearance between shell and Baffle per TEMA Table RCB-4.3

    Thanks for your responses. However, can anyone share real example i.e. heat exchanger currently in operation. Regards, Ijaz
  17. Muhammad Ijaz

    Hydrostatic test of tubes

    Dear All, We require A-179 tubes (OD 19.05 - 2.11mm MWT) to be hydrostatically tested at 250 bar (25MPa) as test pressure of tube side of heat exchanger is 250bar. But manufacturer says that he shall perform hydrostatic test at 70 bar (7MPa). Per Table 7 (para 23.2) of SA-450, Hydrostatic test...
  18. Muhammad Ijaz

    Clearance between shell and Baffle per TEMA Table RCB-4.3

    Dear All, Inner diameter of heat exchanger shell is 438mm and diameter of baffle is not specified on the drawing. Therefore clearance between shell and transverse baffle can not calculate. Moreover, 438 mm Shell ID is neither in range of 152-432 nor in 457-991 of below Table RCB-4.3 of TEMA. ...
  19. Muhammad Ijaz

    What is nominal wall thickness in B31G

    Thickness specified on drawing is 7.9 mm. One more question is What is circumferential oriented corrosion extent as per B31G? We understand that if corrosion (e.g. pits) is located at angle of more than 45 deg to longitudinal axis of pipe. Please confirm.
  20. Muhammad Ijaz

    What is nominal wall thickness in B31G

    Dear 0.00, I understand that your point of view is "nominal wall thickness referred for Level 0 Evaluation in B31G is installed pipe nominal thickness and not B31.8 nominal thickness". Please confirm.

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