Connecting three equal-diameter tubing lines at a 90-degree intersection, Pioneer Industries Brass Double Ferrule Union Tees provide symmetrical fluid division and instrumentation take-off with zero leakage and maximum structural rigidity up to 5,000 PSI.
The Brass Double Ferrule Union Tee is a three-way fitting designed to divide or combine fluid streams in high-pressure tubing systems. It features two in-line compression ports on the straight run and one perpendicular 90-degree compression port on the branch, all configured for identical tubing outside diameters.
Forged from heavy-duty brass alloy (ASTM B283 CW617N), Pioneer Union Tees provide exceptional resistance to mechanical torsion, thermal shock, and cyclic vibration. Each port utilizes twin-ferrule mechanical swaging to deliver an uncompromising, helium-leak-tight seal up to 5,000 PSI.
Manufactured by Pioneer Industries Mumbai and exported globally to process plants, automation machinery OEMs, compressor builders, and analytical laboratory facilities.
Components are precision CNC-machined from premium extruded brass (IS 319 / ASTM B16 / CW614N) with micro-smooth surface finishes. Every production lot undergoes rigorous metallurgical spectrometry, optical CMM dimensional checks, and helium leak detection, accompanied by authentic EN 10204 Type 3.1 Mill Test Certificates.
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Each tee is hot-forged with reinforced crotch sections that resist internal hydraulic hoop stress and bending moments imposed by unsupported tubing lines.
All three ports feature silver-plated nut threads and mirror-ground 20° seating cones that ensure smooth, low-torque swaging without tube rotation.
Metric tubing 3 mm to 25 mm OD (MPUT Series) and fractional tubing 1/8" to 1" OD (IPUT Series).
Explore comprehensive engineering dimensional configurations for Metric Series and Fractional Series, Operating Parameters, and Certified Metallurgy. Manufactured according to ASME B31.3, ISO 19879, and international instrumentation standards.
| Part No. | Tube O.D. T mm | >E mm | h mm | H mm | >F | >G | >l | >L | Working Pressure |
|---|---|---|---|---|---|---|---|---|---|
| MPUT-02 | 2 | 1.7 | 9.5 | 12 | 12.9 | 15.3 | 15.7 | 22.3 | 5,000 PSI / 345 Bar |
| MPUT-03 | 3 | 2.4 | 9.5 | 12 | 12.9 | 15.3 | 15.7 | 22.3 | 5,000 PSI / 345 Bar |
| MPUT-04 | 4 | 2.4 | 12.7 | 12 | 13.7 | 16.1 | 18.8 | 25.4 | 5,000 PSI / 345 Bar |
| MPUT-06 | 6 | 4.8 | 12.7 | 14 | 15.3 | 17.7 | 19.6 | 27.0 | 5,000 PSI / 345 Bar |
| MPUT-08 | 8 | 6.4 | 14.3 | 16 | 16.2 | 18.6 | 21.3 | 28.8 | 5,000 PSI / 345 Bar |
| MPUT-10 | 10 | 7.9 | 17.5 | 19 | 17.2 | 19.5 | 23.9 | 31.5 | 5,000 PSI / 345 Bar |
| MPUT-12 | 12 | 9.5 | 20.6 | 22 | 22.8 | 22.0 | 25.9 | 36.0 | 5,000 PSI / 345 Bar |
| MPUT-15 | 15 | 11.9 | 25.4 | 25 | 24.4 | 22.0 | 28.7 | 38.8 | 5,000 PSI / 345 Bar |
| MPUT-16 | 16 | 12.7 | 25.4 | 25 | 24.4 | 22.0 | 28.7 | 38.8 | 5,000 PSI / 345 Bar |
| MPUT-18 | 18 | 15.1 | 27.0 | 30 | 24.4 | 22.0 | 29.7 | 39.8 | 5,000 PSI / 345 Bar |
| MPUT-20 | 20 | 15.9 | 31.8 | 32 | 26.0 | 22.0 | 32.5 | 42.6 | 5,000 PSI / 345 Bar |
| MPUT-22 | 22 | 18.3 | 31.8 | 32 | 26.0 | 22.0 | 32.5 | 42.6 | 5,000 PSI / 345 Bar |
| MPUT-25 | 25 | 21.8 | 36.0 | 38 | 31.3 | 26.5 | 36.8 | 49.1 | 5,000 PSI / 345 Bar |
| Part No. | Tube O.D. T in | E Min | h in | H in | F | G | l | L | Working Pressure |
|---|---|---|---|---|---|---|---|---|---|
| IPUT-01 | 1/16 | 1.27 | 3/8 | 5/16 | 8.63 | 10.92 | 14.00 | 17.88 | 5,000 PSI / 345 Bar |
| IPUT-02 | 1/8 | 2.28 | 3/8 | 7/16 | 12.70 | 15.24 | 15.74 | 22.35 | 5,000 PSI / 345 Bar |
| IPUT-03 | 3/16 | 3.04 | 1/2 | 1/2 | 13.71 | 16.00 | 17.78 | 24.38 | 5,000 PSI / 345 Bar |
| IPUT-04 | 1/4 | 4.82 | 1/2 | 9/16 | 15.24 | 17.78 | 19.55 | 26.92 | 5,000 PSI / 345 Bar |
| IPUT-05 | 5/16 | 6.35 | 9/16 | 5/8 | 16.25 | 18.54 | 21.33 | 28.70 | 5,000 PSI / 345 Bar |
| IPUT-06 | 3/8 | 7.11 | 5/8 | 11/16 | 16.76 | 19.30 | 23.11 | 30.48 | 5,000 PSI / 345 Bar |
| IPUT-08 | 1/2 | 10.41 | 13/16 | 7/8 | 22.86 | 21.84 | 25.90 | 36.06 | 5,000 PSI / 345 Bar |
| IPUT-10 | 5/8 | 12.70 | 15/16 | 1 | 24.38 | 21.84 | 28.70 | 38.80 | 5,000 PSI / 345 Bar |
| IPUT-12 | 3/4 | 15.74 | 1-1/6 | 1-1/8 | 24.38 | 21.84 | 29.71 | 39.87 | 5,000 PSI / 345 Bar |
| IPUT-14 | 7/8 | 18.28 | 1-1/4 | 1-1/4 | 25.90 | 21.84 | 34.54 | 44.70 | 5,000 PSI / 345 Bar |
| IPUT-16 | 1 | 22.35 | 1-27/64 | 1-1/2 | 31.24 | 26.41 | 36.83 | 49.02 | 5,000 PSI / 345 Bar |
| Operating Parameter | Standard Specification | Severe Service / High-Pressure Rating |
|---|---|---|
| Fluid Media Compatibility | Compressed Air, Mineral Oils, Hydraulic Fluids, Inert Gases | Natural Gas, Vacuum lines, Steam & Glycol circuits |
| Working Pressure Range | Vacuum to 5,000 PSI (345 Bar) depending on tube size | Proof pressure tested to 1.5× design working pressure |
| Helium Leak Integrity | < 1 × 10⁻⁹ mbar·l/s | Suitable for ultra-clean analytical & vacuum systems |
| Temperature Envelope | -200°C to +200°C (-328°F to +392°F) | Cryogenic to moderate steam and hot oil service |
| Turns From Finger-Tight | 1-1/4 Turns (sizes 1/4" to 1" / 6mm to 25mm) | 3/4 Turn (sizes 1/16" to 3/16" / 2mm to 4mm) |
| Compatible Tubing | Seamless Copper (ASTM B75, B88), Brass (ASTM B135) | Nylon, PU, PTFE (with Pioneer brass tube inserts) |
Pioneer Industries manufactures Brass Double Ferrule Union Tee using high-tensile extruded brass bar stock and forgings with controlled microstructural annealing:
| Component / Grade | Material Standard | Composition / Chemistry |
|---|---|---|
| Fitting Body / Bar | ASTM B16 / IS 319 Gr. 1 / CW614N | Cu: 60.0–63.0%, Pb: 2.5–3.7%, Fe: 0.35% Max, Zn: Balance |
| Forged Elbows / Tees | ASTM B283 / CW617N C37700 | Cu: 57.0–60.0%, Pb: 1.5–2.5%, Fe: 0.30% Max, Zn: Balance |
| Front & Back Ferrules | ASTM B16 / Cold-Worked Annealed | Controlled Alpha-Beta phase balance for clean collet swaging |
| Optional Naval Brass | ASTM B21 / CW712R C46400 | Cu: 59.0–62.0%, Sn: 0.5–1.0%, Pb: 0.20% Max, Zn: Balance |
Our manufacturing, swaging tolerances, and quality verification strictly adhere to international engineering benchmarks:
Brass Double Ferrule Union Tee components are deployed across demanding industrial instrumentation, process lines, and pneumatic circuits, including:
Branching main compressed air lines to individual pneumatic valves and cylinders.
Providing high-side and low-side sensor taps on flowmeter impulse piping.
Splitting cooling water lines across parallel electronic or machine tool radiators.
Routing sample streams simultaneously to an online analyzer and a manual grab-sample port.
Distributing lube oil from main distribution lines to secondary machine bearings.
Installing safety relief valve bypass lines on gas compressor discharge headers.
Vibration-resistant fluid distribution on shipboard hydraulic and pneumatic skids.
Branching pressure signals simultaneously to reference gauges and devices under test.
Pioneer Industries’ Brass Double Ferrule Union Tee components are trusted across critical global industrial sectors:
Expert engineering insights and technical guidance regarding swaging mechanics, pressure thresholds, tubing compatibility, and installation protocols for Brass Double Ferrule Union Tee.
A Brass Double Ferrule Union Tee is a 3-way fitting that connects three bare tubes of equal diameter at a 90-degree intersection using twin-ferrule compression assemblies on all three ports.
Rated up to 5,000 PSI (345 Bar) for sizes 1/8″ to 1/4″ and up to 3,200 PSI for 1/2″ size per ASME B31.3 instrumentation codes.
Metric Series MPUT covers 3mm to 25mm tube OD, and Fractional Series IPUT covers 1/8″ to 1″ tube OD.
Hot-forged brass conforming to ASTM B283 CW617N / C37700 or extruded brass bar stock ASTM B16 Alloy C36000.
Insert each tube squarely into its port until bottomed, finger-tighten the nuts, and tighten 1-1/4 turns with a wrench (3/4 turn for sizes 1/8″ and 3/16″).
Yes. All three ports can be disassembled and remade independently multiple times by tightening approx. 1/12 to 1/6 turn beyond finger-tight.
No. The internal bore is precision-machined to match the internal diameter of standard tubing, ensuring minimal turbulence and pressure loss.
Yes. The double-ferrule mechanical swaging provides robust resistance to severe vibration, shock, and thermal cycling.
Yes, certified helium leak tight (< 1 × 10⁻⁹ mbar·l/s) down to -750 mmHg vacuum.
Every lot is accompanied by EN 10204 Type 3.1 Material Test Certificates, hydrostatic test records, and dimensional reports.
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Note: Please note that the information on this document is for illustration purposes only as information may vary with individual products, their grade and applications industries or uses and therefore cannot be guaranteed as accurate. © Copyright 2026 by Pioneer Industries. All Rights Reserved.
