參考文獻.1.ISO.11922,1.1997、Thermoplastics,pipes for,the conveyance of。fluids,Dimensions。and tolerances、Part,1、Metric,series,2、ISO,TR,10839,2000。Polyethylene,pipes and,fittings for the,supply,of.gaseous,fuels Code、of。practice,for.design handling、and.installation 3,IEC,60529,2001.Degrees、of.protection,provided by,enclosures,IP、code,4。EN,12117,1997,Plastics。piping、systems Fittings,valves,and,ancillaries.Determination、of.gaseous,flow。rate.pressure。drop,relationships,5。IS0。12176,1.1998,Plastics。pipes、and,fittings Equipment,for,fusion jointing。polyethylene、systems,Part.1。Butt、fusion,6,IS0,12l76 2,2000,Plastics pipes.and。fittings Equipment,for。fusion jointing.polyethylene,systems,Part.2,Electrofusion 7、EN,1555 3,2002、Plastics pipimg、systems,for.the。supply,of.gaseous fuels Polyethylene、PE。Part、3,Fittings