High Pressure Stainless Steel Tube Fittings - Dual Ferrules Compression Union Elbows for Industrial Applications

The 316L option is pretty much standard for anyone working with corrosive media at high temps — it's better than reagent grade fittings because those rarely spec proper chromium-nickel content like these do.

Pressrue rating goes form 3000 PSI up to 6000 PSI depending on the size and wall schedule you need, though we typically stock more of the 1/4" and 3/8" sizes for that range, so if you're looking at 1/2" or bigger you'll want to check lead time (usually 15-30 days).

What dual ferrules design does is it bites into the tube without deforming it, which means you can break and remake the connection a few times without losing seal integrity — something single-ferrule systems can't do, and honestly that's the main reason most buyers go with this type for high-vibration lines.

The elbows come in 90° and 45° configurations, we've got BSPT and NPT threads available, and the MOQ is 100 pieces but that's negotiable if we're talking a long-term arrangement or if you need a smaller test batch first.

Also, you should know these are precision forged, then CNC machined, not just cut from bar stock, which matters for grain flow in high-pressure appliction — we've got TUV certs that show the testing meets API 598, but we're not set up for cryogenic service below -54°C, so keep that in mind if your line drops lower.

Anyway, we usually have stock on 304 in the 1/8" to 3/8" range, but 321 stainless we'll need to run a batch for, which adds roughly 20 days or so to the timeline.