GB 50646-2020 Special gas system engineering technical standards

Scope: The "Special Gas System Engineering Technical Standard" is now approved as a national standard, numbered GB50646-2020, and will be implemented from October 1, 2020. Among them, Articles 3.1.5 (1, 2), 3.1.6, 3.2.5, 3.2.6, 3.2.7, 3.3.7, 3.3.8, 4.2.1 (2, 5, 6), 4.3.1 , 4.4.4, 4.4.7, 5.2.1 (1, 2, 3, 4, 5), 5.2.3 (1, 2, 3), 5.2.6, 5.4.5, 6.1.3, 6.1.4 , 6.2.6, 7.2.1, 7.2.9, 9.1.3, 9.2.5, 9.2.6(1), 9.3.2, 9.3.15, 9.3.17, 10.6.2(7), 10.7.2 Articles (paragraphs) are mandatory and must be strictly enforced. The original national standard "Technical Specifications for Special Gas System Engineering" (GB50646-2011) will be abolished at the same time. This standard is published on the website of the Ministry of Housing and Urban-Rural Development (www.mohurd.gov.cn), and is published by the China Planning Publishing House organized by the Institute of Standards and Quotas of the Ministry of Housing and Urban-Rural Development. Ministry of Housing and Urban-Rural Development of the People's Republic of China February 27, 2020

GB 50646-2020Special gas system engineering technical standards