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 StrengthsNCG 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:
- Birdcaging of the wires
- Broken wires or strands
- Visible "bubbles" in the unit either slack or when fitted to the hose
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.