护膝CE认证的标准是：EN 14404: Personal protective equipment - Knee protectors for work in the kneeling position个人防护设备-下跪位置工作的护膝
属于个人防护用品II类，需要通过类型检测和CE认证，方可打上CE标记。
This document specifies the requirements for knee protectors for use in a kneeling position. Requirements forThe marking of knee protectors andThe information to be supplied byThe manufacturer are given. Test methods are described and performance levels are defined. Where protection against additional hazards is claimed, performance requirements from other applicable standards may also be applied.This standard does not apply to knee protectors that are medical devices or are intended for sports.</a></a>