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TY14-3-1047-81技术标准是鉴定球铁铸管质量的基本方法.标准中规定要从铸管壁上切取试块,然后加工成圆棒形拉伸试样来测定球铁铸管的机械性能.但是,制取这类试样既费工又费时.国外一些主要的球铸管生产厂家规定采用圆环形试样来测定球铁铸管的机械性能.这种试样比圆棒形试样要经济得多.
TY14-3-1047-81 The technical standard is the basic method to identify the quality of ductile iron pipe.It is stipulated in the standard that the test piece should be cut from the wall of the pipe and then processed into a round bar shaped tensile test to determine the ductile iron Mechanical properties.However, the preparation of such samples is both time-consuming and labor-consuming.There are some foreign manufacturers of dome-shaped tubes require the use of circular specimens to determine the mechanical properties of ductile iron pipe.This sample than the round bar Shaped specimens are much more economical.