Standard No.:	JB/T 1308.4-2026
Chinese Name:	PN2500超高压阀门和管件 第4部分：异径接管
Professional Classification:	JB    Professional Standard - Machinery
Source Content Issued by:	MIIT
Issued on:	2026-02-13
Implemented on:	2026-9-1
Status:	to be valid
Superseding:	JB/T 1308.17-2011 PN 2500 ultrahigh pressure valves and fittings —Part 17：Reduced pipes JB/T 1308.19-2011 PN 2500 ultrahigh pressure valves and fittings —Part 19：Equal–diameter three–way and equal–diameter four–way JB/T 1308.20-2011 PN 2500 ultrahigh pressure valves and fittings —Part 20：Reduced three-way and reduced four-way JB/T 1308.21-2011 PN 2500 ultrahigh pressure valves and fittings —Part 21：Elbows
Target Language:	English
File Format:	PDF

本文件规定了 PN2500 超高压阀门和管件用异径接管的结构型式、尺寸、技术要求和标记。
本文件适用于公称尺寸为 DN3～DN25，非腐蚀性介质用的锻造钢制阀门的管件的制造。