Home / Standards / GB/T 13021-2023 GB/T 13021-2023 Active Polyolefin pipes and fittings—Determination of carbon black content—Test method of alcination and pyrolysis 聚烯烃管材和管件 炭黑含量的测定 煅烧和热解法 Standard Type GBT ICS 83.140.30 CCS G33 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A