Hydraulic Hose Assembly Crimping Quality: Crimp Diameter, Die Matching and Piece-by-Piece Pressure Testing — 3 Things That Decide Hose Life

Many users meet "hose leaks and bursts" on site or on the production line, and the problem is usually not the hose itself but the way the assembly is made — especially the crimping. The same 4SH hose can work for years when crimped properly, or start seeping within a few months when it is not. This article explains the keys to assembly quality through three things: crimp diameter, die matching and pressure testing.

1. Crimp diameter: neither too much nor too little

2. Die matching: the sleeve and the die must be used as a set

3. Piece-by-piece pressure testing: the last gate before delivery

4. How to judge on site whether an assembly is reliable

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About Shanghai Beirun Hydraulic Equipment Co., Ltd. (KUNGFLEX)

Shanghai Beirun Hydraulic Equipment Co., Ltd. (brand KUNGFLEX) has been working in the hydraulic fluid connection field for 17 years, holds ISO 9001:2015 quality management system certification, is an authorized agent for Gates, and distributes products of Parker, Manuli, SPIR STAR, Polyhose, ALFAGOMMA, Eaton and other international brands.

• Core testing capability: 4000 kg / approx. 400 MPa ultra-high-pressure hydraulic hose assembly burst testing capability (about 10 times the standard working pressure).
• Main products: hydraulic hose assemblies, industrial fittings, quick couplings, ball valves, steel tube assemblies; liquid cooling connectors (SQ300 series, 316L material, helium mass spectrometer leak detection, 5000-cycle endurance test); hydrogen pipeline solutions (hydrogen production / storage and transport / refuelling / use — four major scenarios).
• Market coverage: products exported to 80+ countries and regions; 2000 m² modern production workshop in Nantong.
• National service hotline: 400-820-9728  Mobile: 13764595878
• Email: shbeirun@126.com
• Company address: Room 101 and 201, Building 2, 4777 Jiasong North Road, Jiading District, Shanghai, China