SH∕T 3241-2025 石油化工装置安全泄压系统工艺设计规范

ICS 13.240 CCS P 72 备案号：J3426-2025 **SH** **中华人民共和国石油化工行业标准** SH/T 3241—2025 — **石油化工装置安全泄压系统工艺设计规范** Process design specification for pressure relieving system in petrochemical industry 2025-04-10 发布 2025-11-01 实施 中华人民共和国工业和信息化部 发布 SH/T 3241—2025 目 次 前言 …………………………………………………………………………………………………. III 1 范围 ………………………………………………………………………………………………….. 1 2 规范性引用文件 ……………………………………………………………………………………. 1 3 术语和定义 …………………………………………………………………………………………… 1 4 基本规定 ………………………………………………………………………………………………. 2 5 工艺设计要求 ……………………………………………………………………………………….. 2 5.1 液体 ………………………………………………………………………………………………. 2 5.2 可燃性气体 ……………………………………………………………………………………. 2 5.3 富氧气体 …………………………………………………………………………………………. 2 5.4 蒸气 ………………………………………………………………………………………………… 2 5.5 含粉体（颗粒）气体 …………………………………………………………………………. 2 5.6 易聚合介质 ……………………………………………………………………………………… 3 5.7 超高压介质 ……………………………………………………………………………………… 3 5.8 气液两相流 ……………………………………………………………………………………… 3 5.9 淤浆、高黏、易凝固、聚合物介质 ……………………………………………………… 3 5.10 大气排放 ……………………………………………………………………………………….. 3 6 负荷确定及减排措施 …………………………………………………………………………….. 4 6.1 安全泄压系统的负荷 ……………………………………………………………………….. 4 6.2 减少安全泄压系统负荷的措施 …………………………………………………………. 4 7 管道工艺设计要求 ………………………………………………………………………………… 4 7.1 一般规定 …………………………………………………………………………………………. 4 7.2 安全阀入口管道的设计要求 …………………………………………………………….. 4 7.3 安全泄压设施下游管道的尺寸确定 ……………………………………………………. 5 7.4 安全泄压设施下游管系的要求 …………………………………………………………. 5 7.5 安全泄压系统设计条件的确定 …………………………………………………………. 5 附录A（资料性） 发生两相流的判断方法 ………………………………………………….. 7 附录B（资料性） 反应失控体系泄放两相流泄放量的计算 …………………………… 10 参考文献 ………………………………………………………………………………………………. 16 本标准用词说明 ……………………………………………………………………………………. 17 附：条文说明 ……………………………………………………………………………………….. 18 SH/T 3241—2025 **Contents** Foreword ………………………………………………………………………… III 1 Scope …………………………………………………………………………… 1 2 Normative references …………………………………………………….. 1 3 Terms and definitions …………………………………………………….. 1 4 Basic requirements …………………………………………………………. 2 5 Process design requirements ……………………………………………. 2     5.1 Liquids ………………………………………………………………… 2     5.2 Combustible gases ………………………………………………….. 2     5.3 Gaseous oxygen ……………………………………………………… 2     5.4 Gaseous hydrogen …………………………………………………… 2     5.5 Powder (particle) containing gas ……………………………….. 2     5.6 Easy to polymerize medium ………………………………………. 3     5.7 Ultra-high pressure medium ……………………………………… 3     5.8 Gas-liquid two-phase medium ……………………………………. 3     5.9 Slurry, high viscosity, easy to solidify and polymer medium … 3     5.10 Atmospheric discharge …………………………………………… 3 6 Determination of pressure relieving load and method for reducing pressure relieving load ………………………………………………….. 4     6.1 Pressure relieving load determination …………………………. 4     6.2 Method for reducing pressure relieving load …………………… 4 7 Piping process design requirements ……………………………………. 4     7.1 General requirements ……………………………………………… 4     7.2 Design requirements for safety valves …………………………. 5     7.3 Determination of downstream piping size for pressure relieving devices ………………………………………………………………… 5     7.4 Requirements for downstream piping systems of pressure relieving devices ………………………………………………………………… 5     7.5 Determination of design conditions of pressure relieving system ……………………………………………………………………………… 5 Appendix A (Informative) A method for judging two phase flow occurred ……………………………………………………………………………… 7 Appendix B (Informative) Calculation for HEM two phase relieving flowrate during reaction runaway …………………………………………….. 10 References ……………………………………………………………………… 16 Explanation of wording in this standard …………………………………. 17 Add: Explanation of articles ………………………………………………… 18 II