This standard applies to the design, construction and acceptance of buried polyethylene pipeline projects for coalbed methane gathering and transportation with nominal outer diameter of 20 mm to 630 mm, operating temperature of -20 ℃ to 40 ℃, and maximum working pressure of no more than 1.0 MPa.
PROJECT
ISO/DIS 22355
40.20
DIS ballot initiated: 12 weeks
Jun 29, 2026
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