scope:

This Defence Standard (Def Stan 47-033) specifies the requirements, for Material Performance Type Testing, Manufacture and Production Testing of wire or synthetic reinforced hose to operate over a temperature range from -40°C to +100°C to operate over temperature range from -40°C up to +120°C in hydraulic systems for use on Her Majesty's [HM] Surface Ships, Submarines and appropriate Shore Establishment application. The size ranges of these hoses are based upon ISO 3949 and ISO 23297.

The tests specified within this Standard reflect the most stringent performance requirements expected in service. The hose assemblies purchased to this Def Stan however may be used for less stringent applications. Alternative requirements will be specified within the Contract.

Hose Types

Type 1 R7- Hose with one layer or more of reinforcement -40°C to +100°C (Equivalent to ISO 3949 R7).

Type 2 R8 - Hose with one layer or more of reinforcement -40°C to +100°C (Equivalent to ISO 3949 R8), for operation at higher pressures than Type R7.

Type 3 R18 - Hose with four or more spiral wound wire reinforcements -40°C to +100° (Equivalent to ISO 3949 R18).

Type 4 - Hose multiple layers of steel or synthetic yarn reinforcement (Equivalent to ISO 23297 Class 210).

Type 5 - Hose with multiple layer of steel wire or synthetic yarn reinforcement (Equivalent to ISO 23297 Class 280).