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本规定适用于由可锻铸铁制造的外径48mm和51mm的钢管脚手架紧固扣件(简称扣件)。 1.引用标准 JGJ22—85 钢管脚手架扣件 GB2828—81 逐批检查计数抽样程序
This provision applies to steel pipe scaffold fastening fasteners (abbreviated as fasteners) with outer diameters of 48mm and 51mm made of malleable cast iron. 1. Reference standard JGJ22-85 steel pipe scaffolding fasteners GB2828-81 batch inspection sampling sampling procedures