pvdf法兰球阀管件技术要求颜色：一般为乳白色，和原材料颜色相似。外观：管件的内外表面应光滑平整，不允许有气泡、划伤、凹陷、明显杂质及颜色不均等缺陷。透光性：管件为半透明状。管件承口为圆锥形单位：毫米公称外径dn接口内径承口口部承口底部***小直径***大直径***小直径***大直径2020.220.419.920.12525.225.424.925.13232.232.431.932.14040.240.439.840.15050.250.449.850.16363.263.462.863.17575.275.674.875.19090.290.689.890.1110110.2110.6109.7110.1)