There are many specs for purging pipelines as these pipelines are used world wide by many companies in the gas business. A utility who owns and runs a 24 inch gas mains and stipulates a pressure of 10psi in a contract has issued you with standards and spec to test and commission this line. So the proposed design has been paid for long before we accepted the contract. The biggest difficulty for any negotiation here is the fact that this is a traditional type of procurement. Thereby we are trying to gather a feasible method based on (any) codes of practice or standards since none has been specified in the contract. Additionally, internal rusting of the steel is rarely ever an issue in the area (meaning that the client itself is not aware of the technicality of nitrogen purging as a mean to stop oxidation.) Therefore, requesting for instruction would result in them asking for 100% concentration of nitrogen within the network without any knowledge behind it. The principal issue wiv contacting the client for instruction is their lack of sufficient in-house knowledge regarding the matter. Nitrogen purging has been mentioned only once in the contract in fine fonts and as a foot note to one of the clauses regarding the quality of pipeline. Lack of clarity in the contract is a valid issue here. So far, the proposed method to conduct the task is utilisation of a vacuum pump to eliminate the internal air, and subsequent injection of nitrogen to the network.Ī big Thanks to those of you replying without a lousy side of sarcasm.
Rust autopurge mod generator#
Since this is a one-off task, purchase of nitrogen generator is out of question for the company, additionally there is no contractor available in the area offering such services.
Rust autopurge mod code#
provided this brief background, I require assistance in regards with following issues:ġ) what is the maximum acceptable level of oxygen to ensure the prevention of internal oxidation? i.e.: what is the required concentration of nitrogen in the network ?Ģ) Is there any general code of design and practice dealing with this issue specifically? ( Again, I have found a substantial chunk of codes concentrating on the flammability of the gaseous mixture, but almost none giving guidelines regarding the internal corrosion ensued from the presence of oxygen and associated nitrogen purging to prevent the matter)ģ) What will be considered a feasible method for the purging itself? The option of cyclic purging is rather expensive considering the amount of nitrogen required. As the junior engineer I am in charge of associated research in this matter. The volume of the network is 2800 m3 and the purging is required as the last step prior to commissioning.Ĭonsidering that nitrogen purging is normally adopted when flammability is an issue, I found very little information regarding the specification of the required procedure for the purpose of preventing internal oxidation.
A pressure of 10 psi has been specified in the contract but no additional specification has been requested.
This is to prevent additional internal oxidation of the steel pipeline. Our firm is obligated to purge a gas pipeline of a maximum diameter of 24" from air utilising nitrogen gas.
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