前言:这是CSA C22的第一版。2第60079-40号，爆炸性环境-第40部分:易燃工艺流体和电气系统之间的工艺密封要求，采用了标题相同的IEC（国际电工委员会）技术规范60079-40（第一版，2015-02），但存在加拿大偏差。这是CSA集团根据《加拿大电气规范》第二部分发布的一系列标准之一。出版时，IEC TS 60079-40:2015仅提供英文版本。CSA集团将在IEC发布法文版。本标准拟与CSA C22结合使用。2号60079-0，爆炸性环境-第0部分:设备-一般要求。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。 CSA集团已将其作为加拿大国家标准发布。范围:本文件规定了易燃工艺流体和电气系统之间的工艺密封的具体要求，如果发生故障，工艺流体可能会直接进入厂房布线系统。注:一些定义根据闪点区分术语“易燃”和“可燃”液体。在压力和/或温度升高的情况下，可燃液体可能会导致形成本技术规范范围内的可燃雾和气溶胶。本文件包含单过程密封设备、双过程密封设备和附加二次过程密封的评估、施工和测试要求。本文件的要求不适用于IEC 60079系列或其他标准中规定的导管密封装置、电缆密封套和其他接线密封方法。 本文件未涉及基本电气安全和防爆要求，但可能适用于正在调查的设备。本文件未涉及泄漏对环境的影响。

Preface:This is the first edition of CSA C22.2 No. 60079-40,Explosive atmospheres — Part 40: Requirements for process sealing between flammable process fluids and electrical systems, which is an adoption, with Canadian deviations, of the identically titled IEC (International Electrotechnical Commission) Technical Specification 60079-40 (first edition, 2015-02). It is one in a series of Standards issued by CSA Group under Part II of theCanadian Electrical Code. At the time of publication, IEC TS 60079-40:2015 is available from IEC in English only. CSA Group will publish the French version when it becomes available from IEC.This Standard is intended to be used in conjunction with CSA C22.2 No. 60079-0,Explosive atmospheres — Part 0: Equipment — General requirements.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope:This document provides specific requirements for process sealing between a flammable process fluid and an electrical system where a failure could allow the migration of the process fluid directly into the premises wiring system.NOTE Some definitions differentiate the terms "flammable" and "combustible" liquids on the basis of their flashpoints. Combustible liquids under conditions of elevated pressure and/or emperature can lead to the formation of flammable mists and aerosols which are within the scope of this technical specification.This document contains requirements for evaluation, construction and testing of single process seal equipment, dual process seal equipment, and add-on secondary process seals.The requirements of this document do not apply to conduit sealing devices, cable glands and other wiring sealing methods addressed in the IEC 60079 series or other standards.Requirements for basic electrical safety and explosion protection are not addressed by this document, but may apply to the equipment under investigation. The effects of leakage to the environment are not addressed by this document.