规定了钢、铝或铜制套圈的最低要求。眼终端可以是佛兰德眼或折返环。还规定了涵盖套圈安全系统型式验收和常规质量控制要求的原型试验。

Specifies minimum requirements for ferrules made of steel, aluminium or copper. The eye termination may be made either as a Flemish eye or a turn back loop. Prototype tests covering the type acceptance of ferrule-secured systems and routine quality control requirements are also specified.