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  • Users: S.G
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  1. S.G

    Welding L-80 Type-1 Tubing to AISI 4130 Hammer Union

    Dear All, We need to weld an L-80 Type-1 tubing to an AISI 4130 Hammer Union. This assembly will be used on a well testing package vent/flare line. We already have the WPS and supporting PQR for base metal AISI 4130 or its equivalent. Post-weld heat treatment (PWHT) will be carried out, and...
  2. S.G

    Heater Burner Ex Rating Requirements.

    Hello All, Would you agree with the below: In an oil and gas plant, the decision to use an explosion-proof (Ex) rated dual-fuel burner (for gas and diesel) depends on the classification of the hazardous area where the burner will be located. The Ex rating is often required for equipment in...
  3. S.G

    Category M (ASME B31.3)

    Thank you!
  4. S.G

    Category M (ASME B31.3)

    Dear All, Is it correct to assume that a wet sour gas with 20% H₂S and 40% CO₂ could potentially fall under Category M (ASME B31.3) due to the high hydrogen sulfide (H₂S) content?
  5. S.G

    Minimum crossing/parallel clearance between direct buried cables (33KV power cable) and gas pipeline

    Hello everyone, What is the minimum crossing or parallel clearance between direct buried cables (33KV power cable) and an underground gas pipeline?
  6. S.G

    Threaded Connections - Plant Piping (Sour Service).

    Hi Steve, It is a corrosion coupon - Retrievable through an access fitting.
  7. S.G

    Threaded Connections - Plant Piping (Sour Service).

    Hello Steve, Corrosion chemical - injection quill.
  8. S.G

    Threaded Connections - Plant Piping (Sour Service).

    Thank you, LitteInch. Much appreciated.
  9. S.G

    Threaded Connections - Plant Piping (Sour Service).

    Hi LittleInch, ASME B31.3
  10. S.G

    Threaded Connections - Plant Piping (Sour Service).

    Dear All, Are threaded connections (for example, injection quills) allowed/acceptable for a highly sour gas service (20% H2S)? Thank you.
  11. S.G

    Fired Heaters - Purge Steam

    Dear All, According to Section 15.3 of API Standard 560, for forced-draft systems, the forced-draft fan can be used to purge the firebox in lieu of purge steam. Does the API text refer to diesel fuel or gaseous fuel?
  12. S.G

    H2S Partial Pressure.

    Thank you, Pierre. Hello George, The mole fraction of H2S in the gas is 10% - this is based on the gas composition / samples. So, as mentioned above. Multiphase flowline: 6-inch flowline System pressure (Flowing wellhead pressure: 500 Psi) GOR: 1500 SCF/BBL Crude oil flowrate: 5,000 barrels...
  13. S.G

    H2S Partial Pressure.

    Hi Pierre, I really need your help on this: I calculated the partial pressure of H2S for systems with a gas phase. I now want the calculation for the following: 6-inch flowline System pressure (Flowing wellhead pressure: 500 Psi) GOR: 1500 SCF/BBL Crude oil flowrate: 5,000 barrels per day H2S...
  14. S.G

    H2S Partial Pressure.

    Thank you, Pierre. Here is the latest edition, the 2020 edition.https://files.engineering.com/getfile.aspx?folder=f2ab27f0-ab58-4288-a5fa-97cc4db8a4e3&file=NACE_MR0175_ISO_15156_2_2020.pdf
  15. S.G

    H2S Partial Pressure.

    Dear All, We have a 6-inch flow line, oil flow rate is 5,000 bopd and GOR 1500 SCF/BBL. The flowing wellhead pressure is 500 P.s.i.g. what is the H2S partial pressure if the H2S is 20%?
  16. S.G

    The Recommended Minimum Distance or Proximity from a Buried Gas Pipeline.

    Dear All, We operate a 12-inch oil export pipeline with an operating pressure of 40 barg, and a 24-inch gas export pipeline with an operating pressure of 65 barg. Both pipelines are buried within the same corridor. We have been informed of plans to construct a gas/petrol station in close...
  17. S.G

    Hot Water Circulation Pump.

    Dear All, We concluded the failure analysis of metal loss in the hot water generation system. Root Cause - Chemical Compatibility and Behavior at High Temperatures: It is evident that the chemical (NORUST SC 47Z UAE) is unsuitable for closed systems or applications at temperatures exceeding...
  18. S.G

    Hot Water Circulation Pump.

    Hi Ed, we have been monitoring the water pH value. The PH value is ranging from 7.5 to 8.4.
  19. S.G

    Hot Water Circulation Pump.

    Hi LittleInch and George, Here is the feedback from the chemical supplier: “The chemical (NORUST SC 47Z UAE) is unsuitable for closed systems or applications at temperatures higher than 80°C. At higher temperatures, ammonium bisulfites decompose, emitting various gases and forming other...
  20. S.G

    Hot Water Circulation Pump.

    Hello George, The length of the 4" section is 800 mm.

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