BS 5315 1991 is the specific 1991 edition of the British Standard titled "Specification for hose clamps". This standard provides the definitive technical requirements for two primary types of hose clamps used across various industries:
Worm-drive clamps
clip-style screw band clamps
The "1991" designation is crucial, as it identifies the exact set of specifications and testing criteria that a clamp must meet to be certified under this version of the standard.
W2 British type worm drive hose clamp is one type of BS 5315 1991 hose clamps.
Material:
W1 - All parts carbon steel with zinc plated
Specifications of BS 5315 1991
The standard is highly detailed, ensuring consistency, safety, and performance.
1. Materials and Construction:
Bands: Must be manufactured from a corrosion-resistant material. This is typically stainless steel (such as AISI 304 or 316 grades) for critical applications or carbon steel with a protective electro-zinc plating for general use.
Screws and Housings: Must be made from materials of adequate strength and corrosion resistance, often matching the band material. The screw thread is specified to ensure smooth engagement and reliable tightening.
2. Dimensional Tolerances:
The standard provides precise tables of sizes, specifying the nominal diameter range (e.g., 12-16 mm, 16-20 mm), band width, and band thickness for each clamp size.
These strict tolerances guarantee interchangeability and a correct fit for specific hose diameters.
3. Performance and Testing:
BS 5315:1991 mandates rigorous tests to prove the clamp's integrity:
Tensile Strength Test: The clamp assembly must withstand a specified minimum tensile load without the band breaking or pulling out of the housing.
Pressure Test: The clamp must seal a hose connection without leakage or failure at a defined proof pressure.
Torque Strength Test: The screw and housing must withstand a minimum torque without stripping or breaking, verifying the durability of the drive mechanism.
Corrosion Resistance: For plated clamps, a salt spray (fog) test is often required to validate the effectiveness of the protective coating.
Production workshop of BS 5315 1991 hose clamps
