爆炸性大气环境 第30-2部分：电热跟踪加热 设计、安装和维护应用指南

[中文适用范围]： IEC/IEEE 60079-30-2:2025 可作为 IEC/IEEE 60079-30-2:2025 RLV 发布，其中包含国际标准及其修订版（Redline version），显示与前一版相比所有技术内容的变化。IEC/IEEE 60079-30-2:2025 提供了在可能存在爆炸性大气环境中应用电热跟踪加热系统的指导，但不包括被归类为需要设备保护等级（EPL）Ga 或 Da（分别对应传统意义上的 Zone 0 和 Zone 20）的情况。本文件还为采用分区方法进行区域分类的爆炸性大气环境提供了指导，适用于部分使用本文件的用户。本文件为电热跟踪加热系统的相关控制和监测设备的设计、安装、维护和维修提供了建议。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工作的设备，也不涵盖用于应力释放的设备。IEC/IEEE 60079-30-2 的第二版取代了 2015 年发布的第一版。与前一版相比，本版包括以下重大技术变更：a) 对第一版进行全面审查和更新；b) 增加附录 I – 电热跟踪加热在爆炸性大气中的其他应用。IEC/IEEE 60079-30-2 第一版（2015 年）和第二版（本文件）之间的变更意义可在本文件的前言中找到。 [外文原描述]： IEC/IEEE 60079-30-2:2025 is available as IEC/IEEE 60079-30-2:2025 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the 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.