爆炸性环境 第30-2部分：电气电阻跟踪加热 设计、安装和维护应用指南

[中文适用范围]： IEC/IEEE 60079-30-2:2025 RLV 包含官方的 IEC 国际标准及其红线版本。红线版本仅提供英文版，可帮助用户快速、直观地比较官方 IEC 标准与其前一版之间的所有更改。IEC/IEEE 60079-30-2:2025 为在可能存在爆炸性气体环境（不包括被归类为需要设备保护级别（EPL）Ga 或 Da 的区域，传统上分别对应 Zone 0 和 Zone 20）中应用电热伴热系统的相关方提供指导。本文件还为采用分区法进行区域分类的爆炸性气体环境提供指导，适用于某些用户。本文件为伴热系统的相关控制和监测设备的设计、安装、维护和维修提供建议。本文件不涵盖通过感应加热、集肤效应加热或直接管道加热运行的设备，也不涵盖用于应力释放的设备。IEC/IEEE 60079-30-2 的第二版取消并替换了 2015 年发布的第一版。本版相对于前一版有以下重大技术变更：a）对第一版进行了全面的审查和更新；b）增加了附录 I – 伴热系统在爆炸性气体环境中的其他应用。IEC/IEEE 60079-30-2 第 1.0 版（2015）与第 2.0 版（本文档）之间的变更内容可在本文档的前言中找到。 [外文原描述]： IEC/IEEE 60079-30-2:2025 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC/IEEE 60079-30-2:2025 provides guidance for the application of electrical resistance trace heating systems in areas where explosive atmospheres can be present, with the exclusion of those classified as requiring Equipment Protection Level (EPL) Ga or Da (traditional relationship to Zone 0 and Zone 20 respectively). This document also provides guidance for explosive atmospheres incorporating the Division method of area classification that can be applied by some users of this document. This document provides recommendations for the design, installation, maintenance and repair of trace heating systems including associated control and monitoring equipment. It does not cover devices that operate by induction heating, skin effect heating or direct pipeline heating, nor those intended for stress relieving. This second edition of IEC/IEEE 60079-30-2 cancels and replaces the first edition of IEC/IEEE 60079-30-2 published in 2015. This edition includes the following significant technical changes with respect to the previous edition: a) a general review and updating of the first edition; b) the addition of Annex I – Other applications of trace heating in explosive atmospheres. The significance of changes between IEC/IEEE 60079-30-2, Edition 1.0 (2015) and IEC/IEEE 60079-30-2, Edition 2.0 (this document) can be found on the foreword of this document.