SAE J517 standard specified hydraulic hose connectors, hose assemblies, application factors requirement as follow:
Hydraulic hose is rarely used without connectors. Hose with connectors attached are commonly referred to as hose assemblies. The general and dimensional standards for hydraulic hose connectors are contained in SAE J516. SAE J516 connectors are identified by a code system as specified in SAE J846. The hose code, in accordance with SAE J846, for use with their respective connectors is shown in Appendix B.
SAE J1475 covers general and performance specifications for hydraulic hose connectors when used in marine applications.
Hose assemblies may be fabricated by the manufacturer, an agent for or customer of the manufacturer, or by the user.
Fabrication of permanently attached connectors to hydraulic hose requires specialized assembly equipment. Field attachable connectors (screw style and segment clamp style) can usually be assembled without specialized equipment although many manufacturers provide equipment to assist in this operation.
Hydraulic hose assemblies have a finite life and factors which will reduce life include:
a. Flexing the hose to less than the specified minimum bend radius
b. Twisting, pulling, kinking, crushing, or abrading the hose
c. Operating above maximum and below minimum temperature
d. Exposing the hose to surge pressures above the maximum working pressure
e. Intermixing hose, connectors, or assembly equipment not recommended by the manufacturer or not following the manufacturer's instructions for fabricating hose assemblies
Surge pressures, noted in item d, are rapid and transient rises in pressure. Surge pressures will not be indicated on many common pressure gauges and can best be identified on electronic measuring instruments with a high-frequency response.
Refer to SAE J1273 for additional information on application factors.
The test requirements for each 100R-series hose are detailed in this document. Specific procedures for conducting each test are contained in SAE J343. The specified tests provide a baseline for performance capability of a hose assembly under controlled laboratory conditions. It is recognized that hydraulic systems will seldom duplicate these test parameters precisely. The hydraulic designer must consider the system demands on the hose assembly and correlate those
demands with the specified requirements, with particular concern for the frequency and amplitude of pressure fluctuations. Rapid pressure cycling with a return to zero accelerates fatigue failures.