National Cable Grips

Product Search header

Product Category
Sub Category
Material
Thimble
Shadow Graphic
Cable Images

Hose Restraints - Formerly "Whipchecks"




What is a stocking type Hose Restraint?

It's a safety device that prevents hose whipping when a high pressure hose or coupling fails.  Hose whipping can cause injury or death.  A stocking type hose restraint should be used to replace existing cable whipchecks.  Cable or sling type whipchecks do not prevent a hose from whipping.

Hose Restraints can also be referred to as Whip Socks and Whip Checks.

 

Why NCG Hose Restraints?

NCG has pioneered the double eye (two leg) cable stocking as a high pressure hose safety device for over 10 years.  NCG participated in the 1998 Safety Services WA Pty Ltd study into the effectiveness of whipchecks by supplying test products and product knowledge. 

The study concluded that double-eye hose restraints are the most effective method for high pressure hose restraint.  10 years later this discovery has become industry standard.

NCG uses high strength 2070 grade galvanised wire from one of the most reputable sources in the world, to guarantee breaking strengths are consistently met.  As preferred by many standards and guidelines, all NCG hose restraints are stamped with NCG, their tensile strength, size range and serial number. 


NCG manufactures the strongest hose restraints on the market and offers the highest level of safety.  NCG can provide certificates of conformance and NATA accredited test certificates.  All wire strand is batch tested at the time of manufacture and test results are available.

 

Types of Hose Restraints

Our HR range of grips are suitable for single ended hose restraint to prevent personal injury in the case of a failed hose or coupling.  This type will secure a single end of a pressure hose to a fixed anchoring point to prevent uncontrolled movement in the event of hose or hose connection failure.

Consideration must be given to the working environment when specifying construction materials.



For double ended hose restraint, and protection against hose splitting along the entirety of the hose, our "Double Eye Both Ends" range is available on request.  When ordering, please specify the exact distance between the shackle points and the exact hose external diameter.



 

 Strength of Hose Restraints

The below table, adapted from Restraint Devices for High Pressure Hoses (1998), can be used as a guide for selecting the correct hose restraint for the job.  However, each application should be evaluated on it's own merit and an engineer should be consulted if there is any doubt as to the strength required to restrain a hose.

Extra heavy duty hose restraints are available on request and can be produced to meet exact strength and size requirements



UTS and ABS Breaking Strengths

NCG offers UTS (Ultimate Tensile Strength) ratings for all products - this guarantees the product design has been destruct tested on a NATA accredited and calibrated test bed.  ABS (Aggregate Breaking Strength) ratings refer to the theoretical strength of the hose restraint.  This can be described as the sum of the breaking strengths of the wires used to comprise the hose restraint.  As the design of the hose restraint puts forces onto the wires that are absent in a straight line test of a single wire, the real breaking strength (UTS) of the hose restraint is considerably less than the theoretical strength (ABS).

NCG will not be beaten on strength and quality of standard hose restraints.

When to replace

NCG hose restraints are single use items and should be replaced after hose or hose connection failure to ensure that the hose system always carries the same amount of protection.  Safety should never be compromised.


Signs of wear or damage, which would indicate a whipcheck grip needs to be replaced, include:
  1. Birdcaging of the wires
  2. Rust
  3. Broken wires or strands
  4. Visible "bubbles" in the unit either slack or when fitted to the hose


Compliance

There is no Australian Standard for hose restraint safety devices, however, NCG can meet related safety standards by providing certificates of conformance or proof load tests if required.