压力等级：燃气用埋地聚乙烯（PE）管道的工作压力详见下表。 Pressure grade: the working pressure of buried polyethylene (PE) pipes for the supply of gaseous fuels is shown in the table below. 规格型号：dn20mm～dn630mm。 Specification and model: dn20mm～dn630mm 执行标准：GB/T 15558.1-2015《燃气用埋地聚乙烯（PE）管材》。 Executive standard: GB/T 15558.1-2015 Buried Polyethylene (PE) Piping Systems for the Supply of Gaseous Fuels — Part 1: Pipes 性能特点： Performance features: 1.密度小，重量轻，容易搬运和安装； 1. Low density, light weight, easy to handle and install; 2.可耐多种化学介质腐蚀； 2. Be able to resist corrosion by a range of chemical media; 3.水力性能优越，其磨阻系数仅为0.009； 3. Excellent hydraulic performance: the wear resistance coefficient is only 0.009; 4.使用寿命长，可达50年以上； 4. Long service lifetime: up to 50 years; 5.连接可靠； 5. Reliable connection; 6.高韧性，抗震性能好； 6.toughness and good seismic performance; 7.较好的抵抗慢速裂纹增长(SCG)和快速裂纹扩展(RCP)的能力。 7. Better resistance to slow crack growth (SCG) and rapid crack propagation (RCP).