When uptime, safety, and fluid integrity matter, choosing the correct fitting is the difference between a reliable system and unexpected downtime. The right fitting ensures a leak-free seal, matches pressure and fluid compatibility, and simplifies serviceability in the field. Action Supply builds and manages custom hose assemblies daily and can help match fittings to your exact application.

Material Selection: Match the Environment

Material choice impacts corrosion resistance, strength, and cost. Stainless steel (316 where marine exposure or salt spray is present) offers excellent corrosion resistance and strength for structural or submerged fittings. Brass is economical and machinable, and performs well in many freshwater or general industrial applications, but can corrode faster in saline environments. Choose material based on fluid chemistry, temperature, and exposure to salt or corrosives.

A Practical Checklist for Choosing Fittings

1. Identify the media: hydraulic oil, freshwater, saltwater, chemical — materials and sealing change accordingly.
2. Confirm pressure & temperature ratings: match fittings and hose to the system’s max working and burst pressures.
3. Match thread type and size: NPT ≠ BSP — use thread gauges or manufacturer tables if unsure.
4. Choose sealing method: metal-to-metal (37° JIC/AN), ORFS face-seal, or thread-seal (NPT + tape/compound).
5. Account for serviceability: will techs need to disconnect often? Choose fittings that tolerate repeated assembly.
6. Plan for corrosion: in marine or corrosive environments choose 316 stainless, bronze, or specially coated parts.
7. Document and label: record part numbers, thread specs, and orientation to remove guesswork on replacements.

Installation & Testing Tips

• Use the correct torque spec for the fitting type; overtightening can damage seals or distort threads.
• For ORFS, always replace O-rings during reassembly and inspect sealing surfaces for nicks.
• For pipe threads (NPT), use appropriate thread sealant or PTFE tape and apply properly (direction, number of wraps).
• Pressure-test new assemblies at the manufacturer-recommended proof pressure before returning equipment to service.

When to Call the Experts at Action Supply

If your job is complex (mixed standards on site, high-pressure hydraulic systems, or marine installations), bring the assembly to the shop or have Action Supply’s on-site team build and verify the assembly. We offer on-site hose assemblies, inventory management, and industry-grade fittings (including Eaton/Weatherhead hoses and couplings) so you get the right part and verified performance the first time.

Call (281) 315-3841 or use our contact form to request on-site assembly or inventory support.