Standards Development

Scope

This document specifies the terminology and definitions, inspection methods, etc. for fiber reinforced polyester moulding compounds clapboard products for cable channel.

This document is applicable to fiber reinforced polyester moulding compounds clapboard products for transmission and distribution cables, communication optical cables, low-voltage power lines, etc. in cable channels such as utility tunnels, tunnels, trenches, pipe wells, bridges, and cable trays.

Purpose

With the rapid growth of urban cable tunnels and comprehensive pipe galleries, safety protection requirements are constantly increasing. In order to meet the needs of electrical circuit separation, prevention of electrical fires and impact from joint explosions, different materials of clapboard product are widely used. The application of clapboard product for cable channel has shown a steady growth trend in recent years, with an annual growth rate maintained at around 15%.The main types of clapboard product are inorganic, composite, and polyester moulding compound. With the performance improvement and application of fiber-reinforced unsaturated polyester molding materials for electrical purposes, the application of fiber-reinforced polyester moulding compounds clapboard products is rapidly increasing. It has better protective effects and economic advantages throughout its entire lifecycle.

The existing standards mainly focus on building construction components. The clapboard products for cable channel are mainly used for separating cable lines prevent the spread of electrical fires and the impact of joint explosions on surrounding lines. It differs from the application scenarios and performance requirements of conventional building structural components. Currently, there is no specific standard for performance test of fiber-reinforced polyester moulding compounds clapboard products for cable channel.

This standard mainly focuses on cable channels, and it is necessary to ensure that the protected cables are not damaged during a fire and can continue to maintain power supply for a certain period of time. The overall performance includes not only fire resistance, but also the physical and chemical properties, mechanical properties, and electrical properties required for application scenarios. The mechanical performance needs to meet the mechanical requirements for cable laying and the mechanical requirements under possible fault conditions. This also differs to some extent from the mechanical requirements in buildings. Fire performance test not only includes small sample testing of materials such as oxygen index and smoke density, but also includes large-scale physical test using combustion devices. However, considering the significant differences between cable fires and building fires, this standard should differ from the combustion intensity of combustion devices in existing standards.

This standard will establish a unified specification for terminology and testing methods, providing a scientific basis for research and development, production, and quality control. It will promote the optimization of product design and ensure reliable product performance. The development of this standard is crucial for strengthening the safety of electrical energy transmission, eliminating technical trade barriers, and promoting the quality improvement of fiber-reinforced polyester moulding compounds clapboard products for cable channels.