筑龙网给排水所有资料全都免费 镀锌焊接钢管及有缝钢塑复合净水管镀锌焊接钢管及有缝钢塑复合净水管公差尺寸标准公差尺寸标准低压流体输送用镀锌焊接钢管GB/T3091-2001CJ/T136-2001 钢塑复合管（PE、PEX）公称口径 D外径普通钢管壁厚mmin公称尺寸 mm允许偏差mm允许公差%塑管壁厚mm允许公差 mm内径尺寸（近似）复合管供应方式直管（m）允许长度偏差 mm151/221.30.5mm2.801.512.86m203/426.90.5mm2.801.518.36m25133.70.5mm3.201.524.06m321 1/442.40.5mm3.501.532.86m401 1/248.31.0%3.501.538.06m+2050260.31.0%3.801.550.06m652 1/276.11.0%4.001.565.06m80388.91.0%4.002.076.56m1004114.31.0%4.002.0102.06m1255139.71.0%4.002.0128.06m150168.30.75%4.502.5151.06m200219.10.75%5.5012.52.50.2203.06m