水电站压力钢管和闸门结构制造加工中钢材的损耗率、虽在有关预算定额和施工手册中有所规定和推荐,但因其分类不细,或相互间辐度相差大,或实际供料条件与测算不符等诸多原因,缺乏应用的合理性和权威性,尤其是钢材转入市场供货后仍属供不应求阶段,即是钢厂定货生产也只能满足材质的厚度要求,不能按要求规格供货,有的还必须增供一定比例的短板,这样就增加了制造耗量。有关损耗形成机理,也未见著分析认证,为了 Although the loss rate of steel products used in the manufacture of steel penstocks and sluice structures for hydropower stations is as stipulated and recommended in the relevant budget quotas and construction manuals, the classification rate is not large or the radiances differ greatly from each other or the actual supply conditions and Calculation inconsistent and many other reasons, the lack of rationality and authority of the application, especially after the steel into the market supply is still in short supply stage, that is, steel production orders can only meet the thickness of the material requirements, can not be supplied according to specifications , Some must also provide a certain percentage of the short board, thus increasing the manufacturing consumption. The formation of loss mechanism, but also did not see the analysis of certification, in order