1. 尺寸是通过优化计算得出的,订购尺寸似乎是厂家提供
2. 壁内径及壁厚公差主要的标准 ASTM A335及国标GB 5310对于内径的规定为
A335: 10.2 For pipe ordered to inside diameter, the inside diameter shall not vary more than ± 1 % from the specified inside diameter. 壁厚内径公差正负1%
11. Permissible Variations in Wall Thickness 11.1 In addition to the implicit limitation of wall thickness for pipe imposed ...
1. 尺寸是通过优化计算得出的,订购尺寸似乎是厂家提供
2. 壁内径及壁厚公差主要的标准 ASTM A335及国标GB 5310对于内径的规定为
A335: 10.2 For pipe ordered to inside diameter, the inside diameter shall not vary more than ± 1 % from the specified inside diameter. 壁厚内径公差正负1%
11. Permissible Variations in Wall Thickness 11.1 In addition to the implicit limitation of wall thickness for pipe imposed by the limitation on weight in Specification A999/A999M, the wall thickness for pipe at any point shall be within the tolerances specified in Table 7. 也就是 -12.5~ +15% 对于大管道。
GB 5310:钢管按公称内径和公称壁厚交货时,其公称内径的允1%,公称壁厚的允许偏差应
符合表1的规定。公差要求似乎比A335严格