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Recent content by PAN

  1. PAN

    Performance differences SAW vs HFW

    Fusion welding is different from pressure welding in principle. HFW pipes have inherent risk in my opinion. However, this depends on your specific requirements/specifications and application in your case.
  2. PAN

    What is the difference between PSL 1 and PSL2?

    gearteeth, The provided link has some outdated information. This might be from old edition of API 5L. You may notice that we can order PSL 2 for pipe size less than 4.5" or bevelled end from pipe manufacturers.
  3. PAN

    List of ASTM killed carbon steels

    The standard could be changed. For an example, the steel shall be killed as per ASTM A36 current edition. However, killed steel is the requirement only for thick plate as per ASTM A36 - 08.
  4. PAN

    CE value in overlay

    Additional essential variable may be from your client specification.
  5. PAN

    SA 516 Gr.70 - "killed" on certificate

    DekDee, You might try to refer ISO 10474 or EN 10204 type 3.1 in your post.
  6. PAN

    Positive Material Identification(PMI)

    PMI instrument is not suitable to identify grade of carbon steel materials. You may require to send sample for detail chemical analysis at laboratory.
  7. PAN

    ASTM A106 2006a, flattening test

    Flattening test may not be necessary for seamless pipe. Please consider ASTM A53 for comparison.
  8. PAN

    Pipe Material substitution

    ASTM A106 is killed steel. PSL 1 will not be killed steel. Therefore, you should consider PSL 2.
  9. PAN

    Tungsten Carbide coating

    Please refer to thread408-289823 .
  10. PAN

    Welding of end flange

    Thirlmere, Do you procure valves from the manufacturer? What's the recommendation from the valve manufacturer in case of out-of tolerance valves?
  11. PAN

    Bolts & nuts in valves

    You may get the answer from the previous discussion. http://www.eng-tips.com/viewthread.cfm?qid=311973
  12. PAN

    Cast Valves with BW ends

    What is your cast valve material?
  13. PAN

    Difference between casting & forging

    You should discuss with your customer about the CSL (Casting Specification Level). I understand that you can refer to API Spec 20A. However, If I am your customer, I may stick with forging to minimize the risk.
  14. PAN

    Shell TAT/TAMAP list.

    In parallel, you may directly ask the vendor who wants to sell their valves to you. They should know their own test result. You may not require the complete list of TAT. Moreover, TAT should be only the starting point. It will help us to know the capability of such vendor. However, the vendor...
  15. PAN

    Inspectors per man-hrs

    holdpt, This depends on qualification level and experiences of inspector. What's your specific requirement?
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