ANSI/ASTM F1973a:2013
聚乙烯(PE)和聚酰胺11(PA11)以及聚酰胺12(PA12)燃料氣體分配系統中轉換配件和工廠組配非陽極升管規格
Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems