Standard No.:	GB/T 4622.2-2022/XG1-2026
English Name:	Spiral wound gaskets for pipe flanges—Part 2: Class designated;includes Amendment 1
Chinese Name:	管法兰用缠绕式垫片 第2部分：Class系列《第1号修改单》
Chinese Classification:	J15    Pipeline fittings
Professional Classification:	GB    National Standard
ICS Classification:	23.040.60 23.040.60    Flanges, couplings and joints 23.040.60
Source Content Issued by:	SAMR, SAC
Issued on:	2026-01-28
Implemented on:	2026-5-1
Status:	to be valid
Superseding:	GB/T 4622.2-2022 Spiral wound gaskets for pipe flanges—Part 2: Class designated
Target Language:	English
File Format:	PDF

本文件规定了Class标识的管法兰用缠绕式垫片（以下简称为垫片）的型式与代号，尺寸，技术要求，检验方法，检验规则，标记、标志、订货信息、包装和贮运。
本文件适用于GB/T 9124.2规定的公称压力为Class 150～Class 1500、公称尺寸为DN 15～DN 600（NPS ?～NPS 24）的管法兰用缠绕式垫片。