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Gas for pipe pigging

Gas for pipe pigging

Gas for pipe pigging

(OP)
Hello everyone,

I have been involved in the specification of pig launchers and receivers for a project with two pipelines onshore and this forum has been very helpful to find the way I should do my stuff, so thanks to everyone. Now I have a question.

Can I use the process gas to move the pig through the pipeline? or I should use inert gas like nitrogen to do it?, our pipelines send sourgas in 28" @ 478psig and methane in 3" @ 1000psig.

Thanks!!!

Manuel González
Equipment & Process Engineer
Mineral, Chemical & Gas Industries

RE: Gas for pipe pigging

(OP)
Thanks BigInch!!! I will consider for the design purposes.

See ya!!!

Manuel González
Equipment & Process Engineer
Mineral, Chemical & Gas Industries

RE: Gas for pipe pigging

If your pig is sensitive to H2S then you have the option of getting a different pig.  The answer to your question is that yes, you should plan on pushing the pigs with process gas.  The owner of the gas would get VERY cranky if you blow down his valuable and expensive product to pig with nitrogen.

David

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