摘要
针对API Spec 5L—2012标准10.2.4条对拉伸试验要求不严密,Oliver伸长率换算公式不适用于高钢级管线钢管的问题,探讨了将均匀延伸率(即最大力总延伸率)纳入管线钢管技术指标的优点。分析认为:均匀延伸率与试样的形式、尺寸没有关系;将均匀延伸率作为管线钢管的技术指标进行要求,可以避开不同类型尺寸拉伸试样断后伸长率的换算问题。建议将均匀延伸率纳入管线钢管技术指标。
The requirement for the tensile test as specified under Article 10.2.4 of API Spec 5L-2012 is not strict, while the conversion equation for Oliver elongation rate is not applicable to the high grade steel linepipe. Addressing the problems, here in the essay the advantages as possibly to be brought about by fitting the uniform elongation rate （i.e., the maximum force general elongation rate） into the technical specification for the steel linepipe are analyzed. As a result, the conclusion is made as follows. The uniform elongation rate has nothing to do with the shape and size of the specimen. And if the uniform elongation rate is taken as a technical target, and specified under applicable technical specification for the steel linepipe, it is possible to avoid any trouble caused by conversion of the elongation rate as resulting from breaking of tensile test specimens with different sizes. Therefore it is suggested to fit the uniform elongation rate into applicable technical specification for the steel linepipe.
出处
《钢管》
CAS
2016年第6期74-76,共3页
Steel Pipe
关键词
管线钢管
拉伸试验
伸长率
均匀延伸率
断后伸长率
steel linepipe
tensile test
elongation rate
uniform elongation rate
after-break elongation rate
