Home / Standards / GB/T 18251-2019 GB/T 18251-2019 Active Method for the assessment of the degree of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds 聚烯烃管材、管件和混配料中颜料或炭黑分散度的测定 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2019-08-30 Implementation 2020-03-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A