IEC 60981:2019 RLV包含官方IEC国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 60981:2019规定了用于电气装置（包括通信和光纤）的超重型电气刚性钢（EHDERS）导管、联轴器、接头和弯头的要求。本文档还为这些组件指定了线程。不适用于IEC 60423中规定的导管。这第三版取消并取代了2004年出版的第二版。本版构成技术修订版。与第二版相比，此版本包括以下重大技术变更:-增加了锌替代涂层的规定； -增加了有机涂层的弹性测试； -关于评估应用于超重型电气刚性钢(EHDER)导管的替代外部涂层的测试的新附件B。

IEC 60981:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it 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 60981:2019 specifies requirements for extra heavy-duty electrical rigid steel (EHDERS) conduits, couplings, nipples and elbows for electrical installations, including communications and fibre optics. This document also specifies threads for these components. It is not applicable to the conduits specified in IEC 60423. This third edition cancels and replaces the second edition published in 2004. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the second edition:
- addition of provisions for alternative coatings to zinc;
- addition of elasticity test for organic coatings;
- new Annex B on tests for evaluating alternative exterior coatings applied on extra heavy-duty electrical rigid steel (EHDERS) conduits.