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

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

Hello Steve, Corrosion chemical - injection quill.

Thank you, LitteInch. Much appreciated.

Hi LittleInch, ASME B31.3

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

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?

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...

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...

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

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%?

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...

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...

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

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...

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

Dear LittleInch, The power consumption stands at 36 kW. Furthermore, please note that the discharge and suction manual valves for the non-working pumps are always kept closed, in accordance with our operating procedures.

Dear George, Apologies for the delayed reply. Please see the attached P&ID as requested. Also, I will check the length of the 4" section with the operations team. I have also confirmed with our operations that the internals of the check valve on the hot water expansion tank were removed prior...

Hi Pierre, Thank you for all your help and input. It is greatly beneficial to have such discussions.

Dear All, Please find the complete set of P&ID documents attached. We are currently awaiting feedback from the chemical supplier regarding the recent failures. Notably, these issues arose following the commencement of a chemical injection in August 2023. It is important to highlight that this...