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  1. Pongsagon

    Contractor for Dehydration System Trouble Shooting

    Dehydration system in our natural gas separation plant is molecular sieve type we are having problem with being hit by free water causing bed loss and we are now seeking for the experts or consultants who has such expertise to systematically identify the root cause, issue the report of root...
  2. Pongsagon

    Hot oil become solid coke and plug inside coils

    There is the hot oil heater for LPG fractionation plant. The air was trapped inside the coils and the hot oil inside the coils become piece of solid coke and plug inside after period of hot flue gas heating outside. Could someone advise, how to disollve the hot oil solid coke, break it or make...
  3. Pongsagon

    Number/ Use of Golden welds

    Gentleman, There is the existing pipeline 8", class600, design pressure 43 barg, design temp -95 C, follow code ASME B31.3. The static mixer will be added to this existing pipeline. The hydrostatic test seem impraciable due to operation point of view (to avoid freezing of left moisture) Can...
  4. Pongsagon

    How to define material grade with NDE?

    Could you please advise about the hardness and composition of A234WPB against ASTM A860 WPHY 65 in detail? Thanks a million.
  5. Pongsagon

    How to define material grade with NDE?

    Gentleman, There is one underground 90 degree elbow size 34". We do not have the record. We want to define the material grade whether it is A234-WPB or ASTM A860 WPHY 65. Can some body advise the NDE method please? Is PMI(Positive Material Identification)applicable? We can not do tensile...
  6. Pongsagon

    Cutting A106 vs API 5L X65

    Cutting of carbon steel pipe, materials A106 and API5L X65 by acetylene gas torch. Is there any differnet for flame cutting temp if the strength is higher. Any advise is highly appreciated
  7. Pongsagon

    Bolts Torque Preload

    I want to check/calculate the bolts torque preload for carbon steel(A694 Gr. F65) WN flange joint 30", 600#, MSS SP44. Stud bolt &2nuts (A193-B7M,A194-2HM)size 2-5/8" x 340 mm - 28 sets. Design pressure of this pipeline is 89.6 barg. Design comply to ASME B31.8. Any help would be very...
  8. Pongsagon

    Flange thickness calculation

    Gentleman, Please kindly let me add my query to this thread. Please advise whether in your engineering/standard practice. On shutdown turnaround, in case entry of static equipments, should we install temporary slip blind that the thickness comply to ASME B31.3 para 304.5.3 if there is the...
  9. Pongsagon

    Calculation of Spade Thickness

    Mr. C2it (Petroleum) Thank a million. Everybody please share whether in your engineering/standard practice. On shutdown turnaround, in case entry of static equipments, should we install temporary spade/blind that the thickness comply to ASME B31.3 para 304.5.3 if we have blocked typical block...
  10. Pongsagon

    Calculation of Spade Thickness

    Gentleman, I want to calculate the min required thickness of carbon steel spade to insert between flanges for shutdown isolation work. Flange size is 4" #600, natural gas pressure is 70 barg. Can someone advise please. Thank you very much. Pongsagon
  11. Pongsagon

    Golden Weld is comply to CODE?

    Gentleman, There is existing underground onshore natural gas pipeline size 34", API 5L X65, lenght 1.3 km. New pipeline size 20" will be tied-in to this existing pipeline by cutting and install tee reducer, 30"X20". Could you please advise as follows; 1) The Contractor has proposed to perform...
  12. Pongsagon

    Uprate existing Pipeline

    The natural gas pipeline 34", length is 1.3 km. Existing design pressure is 69 barg however this pipeline was constructed from materials which has higher design pressure at 143.4 barg. We intend to increase design pressure from 69 barg to 89.6 barg. Can anybody advise whether ASME B31.8 allow...

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