按现行国标与行业规范，速差防坠器(速差自控器)的使用寿命可总结为：

　　一、设计 / 强制报废年限(主流)

　　GB 24544-2023：正常使用、维护到位，设计使用寿命≥5 年。

　　行业通行做法：

　　一般环境：5 年强制报废(从生产日期算，不管用没用)。

　　恶劣 / 强腐蚀环境(化工、海边、长期露天)：3 年。

　　部分厂家标签：标注保质期 3 年，3 年后即使外观好也建议更换。

　　二、“不管到没到 5 年，出现下列情况立即报废”

　　受过一次真实坠落冲击(锁止过)，一定要报废。

　　钢丝绳：断丝、磨损超10% 直径、变形、锈蚀严重。

　　织带：磨损、灼伤、老化、撕裂、褪色严重。

　　壳体：裂纹、变形、严重腐蚀、摔过。

　　制动失效：拉动不锁止、锁止距离超0.2m、回弹卡顿。

　　标签脱落、不清、无生产日期 / 认证。

　　三、检验周期(影响实际寿命)

　　每日：使用前外观 + 试锁。

　　每季度 / 半年：正规机构功能与载荷检测。

　　每年：第三方年检(有效期 1 年)。

　　四、一句话记牢

　　正常环境：5 年;恶劣环境：3 年;受过坠落冲击：立即报废;每年必须年检。

　　Service Life of Retractable Fall Arresters (per Current National Standards & Industrial Specifications)

　　I. Design & Mandatory Scrap Lifespan (General Industry Standard)

　　GB 24544-2023: When properly used and maintained, the minimum design service life is 5 years.

　　Universal industrial practices:

　　Ordinary working environments: Mandatory scrap after 5 years, calculated from the production date, regardless of actual usage frequency.

　　Harsh or highly corrosive environments (chemical plants, coastal areas, long-term outdoor exposure): Mandatory scrap after 3 years.

　　Labels of some manufacturers indicate a 3-year shelf life. Replacement is recommended after 3 years even if the unit appears intact.

　　II. Immediate Scrap Requirement (Regardless of Remaining Design Lifespan)

　　Retractable Fall Arresters shall be scrapped immediately if any of the following conditions occur:

　　The unit has sustained a real fall arrest impact (triggered locking mechanism).

　　Steel cable issues: Broken wires, abrasion loss exceeding 10% of the nominal diameter, deformation, or severe corrosion.

　　Webbing issues: Abrasion, burn damage, aging, tearing, or severe discoloration.

　　Housing issues: Cracks, deformation, heavy corrosion, or severe impact damage from drops.

　　Brake malfunction: Failure to lock when pulled, locking travel exceeding 0.2 meters, or jerky retraction.

　　Missing, illegible marking labels, or absence of production date and certification marks.

　　III. Inspection Intervals (Determine Actual Serviceable Lifespan)

　　Daily: Visual inspection and locking function test prior to each use.

　　Quarterly / Semi-annually: Functional and load testing conducted by certified service providers.

　　Annually: Third-party annual inspection with a 12-month valid inspection certificate.

　　Core Takeaway

　　5-year service life for ordinary environments; 3-year service life for corrosive/harsh environments; immediate scrapping after any fall impact; mandatory annual third-party inspection.

　　Terminology Note

　　速差防坠器 – Retractable Fall Arrester (required term as requested, also called self-retracting fall arrester in international safety standards)