Plastic (PE) pipes in coal mining压力等级：煤矿井下用供水排水、压风、喷浆管材公称压力为0.4MPa～1.6 MPa,抽放瓦斯气体管材的高公称压力为-0.097MPa。 Pressure grade: the nominal pressure of the water supply and drainage, pressure ventilation and spraying pipes in coal mining is 0.4MPa～1.6 MPa; the maximum nominal pressure of methane gas drainage pipes is -0.097MPa. 规格型号：dn20mm～dn1200mm。 Specification and model: dn20mm～dn1200mm 执行标准： MT558.1-2005《煤矿井下用塑料管材第1部分:聚乙烯管材》、MT181-1988《煤矿井下用塑料管安全性能检验规范》。 Executive standards: MT558.1-2005 Plastic Pipes in Coal Mining — Part 1: Polyethylene Pipes and MT181-1988 Code for the Test on Plastic Pipe Safety Property for Coal Mining. 规格尺寸：煤矿井下用供水排水（KS）、压风（KF）、喷浆（KJ）管材公称压力及规格尺寸应符合表1和表2的要求。 Specification and dimension: the nominal pressure, specification and dimension of water supply and drainage (KS), pressure ventilation (KF) and spraying (KJ) pipes in coal mining meet the requirements in tables 1 and 2.