Miscellaneous Fluid Conveying Parts

How to Choose the Right Miscellaneous Fluid Conveying Part

Match flange code to system pressure, support every span, and cap every port the moment it’s opened.

• Select SAE Flange Code Based on System Pressure SAE J518 Code 61 flanges are rated for pressures up to 3,000–5,000 PSI depending on port size — the standard for most mobile and industrial hydraulic pump and motor connections. Code 62 flanges are the high-pressure version, rated for up to 6,000 PSI at equivalent port sizes — specified for high-pressure hydraulic circuits and applications where Code 61’s pressure limit would be exceeded. The two codes are not interchangeable — Code 62 hardware has a different bolt circle and body geometry than Code 61. Identify the pressure rating of the circuit before selecting a flange code.
• Install Support Clamps at Every Unsupported Hose and Tube Span Hydraulic hose and tube runs that are not properly supported against their own weight and system vibration develop fatigue failures at fitting connections — the highest-stress point in any hose assembly. Support clamp spacing should follow the tube or hose manufacturer’s recommendation for the OD and application, with clamps placed within one clamp-width of every fitting or adapter. Weld-plate mounted clamps provide the most rigid support for tube runs in fixed equipment; rail-mount clamps allow adjustment during installation on mobile equipment and later repositioning during system modifications.
• Use Protective Closures Immediately on Any Open Port or Fitting Every unprotected hydraulic port is an open path for contamination — and contamination is the primary cause of hydraulic component wear and premature failure. Protective caps and plugs for JIC fittings, ORFS ports, split flanges, and pipe threads should be installed immediately when a fitting is removed or a new component is unpackaged — and removed only at the moment the connection is made. Leaving ports open during installation, even briefly, introduces contamination that works its way into valves and cylinders over thousands of operating cycles.