5.7.2 Scope
The requirements of 4-6-2/5.7.3 to 4-6-2/5.7.6 apply to flexible hoses of metallic or non-metallic material intended for a permanent connection between a fixed piping system and items of machinery. The requirements also apply to temporary connected flexible hoses or hoses of portable equipment. Flexible hose assemblies as defined in 4-6-2/5.7.1 are acceptable for use in oil fuel, lubricating, hydraulic and thermal oil systems, fresh water and sea water cooling systems, compressed air systems, bilge and ballast systems, and Class III steam systems where they comply with 4-6-2/5.7.3 to 4-6-2/5.7.6. Flexible hoses are not acceptable in high pressure fuel oil injection systems. These requirements for flexible hose assemblies are not applicable to hoses intended to be used in fixed fire extinguishing systems.