Optical cable flattening test

The optical cable flattening test can simulate the situation where the optical cable is crushed by people or vehicles during construction and use to determine the ability of the optical cable to withstand flattening. During the test, the optical fiber in the optical cable is not damaged, and the attenuation change value should be ensured to be within a reasonable range.
Zhongke Testing Reliability Experiment Center has the mechanical properties of various optical cables and provides professional flattening test services for optical cables.

1. According to different transmission performance, distance and purpose, optical cables can be divided into user optical cables, local optical cables, long-distance optical cables and submarine optical cables.
2. According to the different conditions of transmission conductors and media, optical cables can be divided into metal-free optical cables, ordinary optical cables, and comprehensive optical cables (mainly used for railway dedicated network communication lines).
3. According to different laying methods, optical cables can be divided into pipeline optical cables, direct buried optical cables, aerial optical cables and underwater optical cables.
4. According to different structural methods, optical cables can be divided into flat structure optical cables, layered optical cables, skeleton optical cables, armored optical cables and high-density user optical cables.

1. The specimen should be placed between two steel plates to prevent lateral movement, and then the force should be applied gradually without any sudden changes. If the force is increased in steps, the increase ratio should not exceed 1.5:1.
2. Unless otherwise specified in the detailed specifications, the applied flattening force should be increased to the value(s) specified in the detailed specifications, such as the long-term allowable flattening force and the maximum allowable flattening force (usually the short-term allowable flattening force), and should be monitored after a holding time of at least 1 minute, and then the flattening force should be gradually removed, and final monitoring and inspection should be performed after 5 minutes.

GB/T 7424.21-2021 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Methods
IEC 60794-1-21: 2020 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Method
BS EN IEC 60794-1-2-2021 Optical fiber cables Part 1-2: General specifications Basic optical cable test procedures General rules
DS/EN IEC 60794-2-21-2021 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Method
LST EN 60794-1-21-2015 Optical cables Part 1-21: General specifications Basic test procedures for optical cables Mechanical test method
DIN EN 60794-1-21-2021 Optical fiber cables Part 1-21: General specifications Basic optical cable test procedures Mechanical test method
KS C IEC 60794-1-1-2007 Optical cables Part 1-1: General specifications General
GB/T 7424.2-2008 General specification for optical cables Part 2: Basic test methods for optical cables