本文件规定了承包商计划使用支腿和闸板的安全要求 制造商这些包括支腿、支撑闸板和闸板，包括机械延伸、内部 阀门和安全装置、密封件、液压连接件（直到第一根软管管线或设计的阀门 B、 参见EN 1804-3:2020）及其吊点，但不包括保护管和防尘罩、外部阀门 以及液压和电液控制系统。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document stipulates the safety requirements for use of legs and rams as intended by the manufacturer. These include legs, support rams and rams, including the mechanical extensions, the inner valves and safety devices, seals, the hydraulic connections (up to the 1st hose line or to the valve of design B, see EN 1804-3:2020) and their lifting points, but excluding protective pipes and gaiters, external valves and hydraulic and electrohydraulic control systems.All current amendments available at time of purchase are included with the purchase of this document.