Pressure pipelines above PN420
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This post was last edited by Caesar on 2022-9-22 21:49. What specifications should be followed for the use and management of pressure pipelines above PN420? The pressure pipeline standard GBT20801 does not cover pressure pipelines with a pressure level above PN420
For pressures greater than 42 Mpa, the provisions for ASME B31.3 Class K pipelines can be referred to.
Currently, hydrogen refueling equipment in China can reach 35 MPa; abroad, there are units capable of handling up to 70 MPa. However, China has not introduced any 70 MPa-grade equipment, possibly due to considerations such as relevant standards.
You can refer to the API 6A specification
Thank you to all the experts for their replies! !