Stainless Steel Ferrule Tube Fittings (Single & Double Ferrule Designs)Stainless steel ferrule tube fittings—available in both single? and dual?ferrule configurations—are engineered to deliver reliable, leak?tight connections for instrumentation, fluid, gas, and hydraulic systems. Crafted predominantly from 316/316L stainless steel (AISI 316/316L), these fittings offer exceptional corrosion resistance, strength, and temperature tolerance across applications Each fitting consists of three main parts:Fitting body – Precision?machined to close tolerances for perfect alignment and seal integrity.Ferrule(s) – Either a single ferrule or a coordinated front/back ferrule pair. In dual?ferrule designs, the front ferrule establishes the primary seal, while the back ferrule ensures mechanical grip and vibration resistanceNut – Applies axial compression, forcing the ferrule(s) against the tubing and fitting body to form a robust mechanical and pressure seal.Single vs. Dual?Ferrule ConfigurationsSingle ferrule: Offers quick, simple assembly and cost?efficiency. Ideal for moderate pressure systems and applications where frequent disassembly is required. Common in lighter-duty instrumentation and pneumatic systems Dual ferrule (most typical): Combines sealing and gripping roles between separate ferrules, enabling higher pressure rating, vibration tolerance, and improved reliability—especially under thermal cycling or mechanical stressPerformance & BenefitsVibration Reliability: Advanced designs (e.g., Swagelok’s hinging/colleting ferrules) ensure stable grip and seal under vibration and shock, promoting safety in high?strain environments Broad Temperature Range: Suitable for cryogenic to industrial temperatures (–200?°C to +400?°C / –325?°F to +752?°F), depending on grade and tubing specifications . Applications Widely used in:
Process instrumentation (e.g., pressure or flow metering in petrochemical, power, food, pharmaceutical, and biotech systems)
Hydraulic and pneumatic controls in manufacturing, automotive, and offshore industries.
Cryogenic operations and vacuum systems.
Gas delivery, analyzers, sampling panels, and high-purity installations.
