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  1. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    Thanks, GD2, looks like now we are on the same page. So, 15000 psi is not a high pressure. I got it. It is not required on Basic Design stage. However if I have some spare time I plan to look into it. Not sure if you read my posts. Usually owner agree with our choice. I'm also not well...
  2. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    GD2,Thanks, but it is still not clear for me. Both Chapter II and Chapter IX have both, allowable stress and WT requirements. Why you use Chapter II in one case and Chapter IX in other? XL83NL, we do specify the Design code. Not the owner. Of cause we will follow the owner requirements if they...
  3. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    GD2, it is an offshore platform which can operate in the Middle East. Does the same allowable stress rules apply for normal Sch and a WT like 1 1/4"?
  4. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    GD2, Thank you. Appreciated for such a detailed response. The application is a piping system outside the equipment. WT calculations and Hoop stress analysis (due to WT>D/6) were done many years ago and repeated multiple times. Piping systems were built many times and we have no complains. I...
  5. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    According to Chapter II the allowable stress will be 35,000 psi. Is it an overkill? No advantage for high pressure and thick wall thickness?
  6. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    Therefore I have a question about allowable stress for this material. It is not listed in table K-1. As I have stated above, B31.3. OBM, WBM, Brine No, I use Chapter IX due to high pressure service. Right. For allowable stress as well. K302.3
  7. DSGPDE

    Allowable stress and wt for ASTM A-519 Grade 4130 tube

    What is allowable stress for ASTM A-519 Grade 4130 tube per B31.3? It is 15000 psi service, room temperature, Tensile ultimate strength is 105000, yield 85000. Is it 56667 psi? Can I use K304.1.2 eq 34a for wall thickness calculations?
  8. DSGPDE

    The volume of sea chest

    myvo, the volume should accommodate dimension of grating and dimension of pipe joint. Sea water velocity inside the sea chest should not exceed the allowable velocity (by Regulations and by requirements of piping systems). Usually the safety margin involved. Basically, it is not a volume...
  9. DSGPDE

    The volume of sea chest

    To calculate a sea chest volume: - calculate sea water consumption (sea water cooling, firewater, sea water service, watermaker systems) for each sea chest - find sea chest nominal diameter from the consumption - check Regulations. Should the unit comply with the latest EPA regulations? Some...
  10. DSGPDE

    Professional development courses for marine piping system engineer

    ANV2006, thank you for the link. I'm more interested in offshore (jack-ups, semisubmersibles, drill ships) piping systems.
  11. DSGPDE

    Professional development courses for marine piping system engineer

    bump
  12. DSGPDE

    Professional development courses for marine piping system engineer

    Do anyone familiar with Professional development courses for marine piping system engineering? Online or local in Houston. I fill myself stuck. Would like to attend appropriate course to improve my abilities. I'm interested in marine piping systems design/calculations and piping system...
  13. DSGPDE

    Society for marine piping systems engineer

    EdStainless, is NACE for Corrosion Engineers? I'm not really involved in corrosion. My field is design and processes for marine piping systems. Marine Structures sounds like for Structural engineers. Maybe good Magazine / Course recommendation?
  14. DSGPDE

    Society for marine piping systems engineer

    TensionvsTorque, I'm responsible for basic process. You are talking about detail design. I work with pipes from 1/2" to 18". Gaskets, bolts, welds are involved, but as a basic material specifications. Pipes are mainly inside the hull.
  15. DSGPDE

    Society for marine piping systems engineer

    Hello, Which Society could you recommend for Marine piping systems engineer. I'm responsible for marine piping systems design in my Company. We do design for Jack-ups, Semi's, Drillships. I joined SNAME, but there is not much activity for marine piping systems. They do have a lot for Naval...

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