Pioneer Industries is a premier manufacturer and exporter of heavy-duty Brass Flare Fitting Union Tees, designed to interconnect three 45° flared tubing branches in high-pressure refrigeration circuits, HVAC manifolds, hydraulic lines, and fuel distribution systems.
The Brass Flare Fitting Union Tee manufactured by Pioneer Industries is a high-integrity three-way fluid distribution connector. Featuring three identical 45° SAE male flare ports configured in a classic T-junction (two in-line run ports and one 90-degree branch port), this union tee allows fluid power and refrigeration engineers to split a primary flow stream into two equal paths or combine two independent fluid lines into a single collection header with minimal turbulence.
Engineered to SAE J512, SAE J513, and ASME B16.26 dimensional specifications, each union tee is precision hot-forged from CW617N / BS 218 forging brass. The heavy forged tee body incorporates reinforced branch gussets and precision-machined wrenching flats, ensuring structural stability under high cyclic operating pressures, thermal expansion stresses, and mechanical vibration.
Pioneer Industries exports Brass Flare Fitting Union Tees to major industrial clients across North America, Europe, the Middle East, South Africa, and Southeast Asia. We supply original equipment manufacturers (OEMs), chiller fabricators, petrochemical plants, and defense contractors with rapid order fulfillment from our extensive finished stock in Mumbai, India.
Every union tee is produced in our ISO 9001:2015 certified manufacturing plant using computer-controlled machining centers that guarantee exact 45-degree flare angles, uniform wall thicknesses, and clean internal flow ports. Complete material traceability is certified through EN 10204 Type 3.1 inspection documents provided with every shipment.
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Pioneer Industries’ Brass Flare Fitting Union Tee offers a completely mechanical, fire-safe, and solderless alternative for dividing or converging fluid lines. By utilizing precision-flared copper or brass tubing seated against micro-machined 45° cones, technicians can construct complex multi-branch piping trees without open flames, making these fittings indispensable during hazardous plant operations and retrofits.
The internal T-junction is machined with balanced hydraulic passages that minimize pressure drop and vortex formation. Because the metal-to-metal seal is formed purely by the compression of the flare nut against the tube flare, the tee can be disassembled and serviced countless times during routine maintenance without cutting or modifying the tubing branches.
Pioneer Industries manufactures Brass Flare Fitting Union Tees in equal branch sizes from 1/8" to 3/4" tube OD, with custom reducing tee combinations available upon request. Working pressures up to 4,000 PSI (276 bar). Conforms to SAE J512, SAE J513, ASME B16.26, and BS 218 standards.
Explore comprehensive engineering dimensional configurations for Fractional Inch Series, Metric Series, and Certified Material Specifications. Manufactured according to SAE J512, SAE J513, ASME B16.26, and international standards.
| Part No. | Tube O.D. (T) | All Ports Flare (UNF) | Center-to-End (A) | Center-to-Branch (B) | Wrench Flat (W) | Weight (approx) | Working Pressure |
|---|---|---|---|---|---|---|---|
| PI-FUT-02 | 1/8" | 5/16-24 UNF | 0.69" | 0.69" | 7/16" | 32 g | 4,000 PSI |
| PI-FUT-03 | 3/16" | 3/8-24 UNF | 0.75" | 0.75" | 7/16" | 40 g | 4,000 PSI |
| PI-FUT-04 | 1/4" | 7/16-20 UNF | 0.88" | 0.88" | 9/16" | 58 g | 4,000 PSI |
| PI-FUT-05 | 5/16" | 1/2-20 UNF | 0.94" | 0.94" | 5/8" | 74 g | 3,800 PSI |
| PI-FUT-06 | 3/8" | 5/8-18 UNF | 1.06" | 1.06" | 3/4" | 98 g | 3,500 PSI |
| PI-FUT-08 | 1/2" | 3/4-16 UNF | 1.25" | 1.25" | 7/8" | 142 g | 3,000 PSI |
| PI-FUT-10 | 5/8" | 7/8-14 UNF | 1.44" | 1.44" | 1-1/16" | 210 g | 2,500 PSI |
| PI-FUT-12 | 3/4" | 1-1/16-14 UNS | 1.62" | 1.62" | 1-1/4" | 315 g | 2,000 PSI |
| Part No. | Tube O.D. (mm) | Thread Profile (UNF) | Center-to-End (mm) | Center-to-Branch (mm) | Wrench Flat (mm) | Weight (g) | Working Pressure (bar) |
|---|---|---|---|---|---|---|---|
| PI-FUT-M06 | 6 mm | 7/16-20 UNF | 22.4 mm | 22.4 mm | 14 mm | 58 g | 276 bar |
| PI-FUT-M08 | 8 mm | 1/2-20 UNF | 23.8 mm | 23.8 mm | 16 mm | 74 g | 262 bar |
| PI-FUT-M10 | 10 mm | 5/8-18 UNF | 27.0 mm | 27.0 mm | 19 mm | 98 g | 241 bar |
| PI-FUT-M12 | 12 mm | 3/4-16 UNF | 31.8 mm | 31.8 mm | 22 mm | 142 g | 206 bar |
| PI-FUT-M16 | 16 mm | 7/8-14 UNF | 36.5 mm | 36.5 mm | 27 mm | 210 g | 172 bar |
| PI-FUT-M18 | 18 mm | 1-1/16-14 UNS | 41.1 mm | 41.1 mm | 32 mm | 315 g | 138 bar |
| Component | Material Specification | Standard Specification | Chemical Composition | Mechanical Properties | Temperature Limits | Key Features |
|---|---|---|---|---|---|---|
| Hot Forged Tee Body | Forging Brass (BS 218 / CW617N) | BS EN 12165 / ASTM B283 C37700 | Cu: 57.0–59.0%, Pb: 1.6–2.5%, Zn: Rem. | Tensile ≥ 440 MPa, 110–150 HB | -54°C to +121°C | Contoured grain flow, dense wall structure, zero porosity, high shock resistance |
| SAE 45° Male Flare Cones | Free Cutting Brass (BS 249 / CW614N) | IS 319 Gr. 1 / ASTM B16 C36000 | Cu: 58.0–60.0%, Pb: 1.5–3.0%, Zn: Rem. | Tensile ≥ 400 MPa, 100–140 HB | -54°C to +121°C | Precision CNC machining, exact 45° cone angle, micro-inch surface finish |
| SAE Flare Nut | Extruded Brass / Forged Brass | SAE J512 / SAE J513 / ASTM B16 | Cu: 58.0–61.0%, Zn: Rem. | Tensile ≥ 380 MPa | -54°C to +121°C | Short and long skirt options, internal 45° beveled shoulder for tube support |
| Tubing Interface | Flared Copper / Brass Tube | ASTM B88 / ASTM B280 / ASTM B135 | Cu ≥ 99.9% (DHP) | Soft Annealed Temper | -54°C to +121°C | 100% metal-to-metal seal, zero elastomeric degradation in refrigerants/LPG |
Brass Flare Fitting Union Tee fittings find deployment across demanding thermal, fluid, and gas piping circuits:
Splits liquid refrigerant from condensing units into multiple evaporator expansion circuits.
Connects high-side and low-side pressure transmitters to centralized refrigeration service testing ports.
Manifolds multiple gas bottles into a common dual-stage pressure regulator header.
Divides main instrument air feeds to power parallel directional control valves in factory automation skids.
Splits centralized lubricating pump output to deliver oil simultaneously to opposing bearing housings.
Distributes hot gas bypass to secondary defrost circuits in commercial heat pump systems.
Branches sea water discharge lines for continuous salinity and temperature monitoring sensors.
Extracts continuous bypass fluid samples to supply gas chromatography analyzing racks.
Pioneer Industries’ Brass Flare Fitting Union Tee are widely used in numerous industries like:
Expert engineering insights and technical guidance regarding design specifications, pressure tolerances, flare cone sealing mechanics, tubing compatibility, and installation best practices for industrial Brass Flare Fitting Union Tee.
A Brass Flare Fitting Union Tee is a forged T-shaped plumbing and instrumentation fitting with three identical 45° SAE male flare ports. It is designed to connect three flared tubing branches together, allowing fluid or gas flowing through a main line to be split into a branch line, or combining two incoming streams into one.
Standard Brass Flare Fitting Union Tees have equal sizes on all three ports (e.g. 3/8" x 3/8" x 3/8"). However, Pioneer Industries also manufactures reducing union tees where the branch port or one of the run ports features a smaller tube flare size to eliminate external reducer fittings.
Yes. Pioneer Industries’ Brass Flare Union Tees are hot-forged with heavy wall sections rated for working pressures up to 4,000 PSI, comfortably exceeding the operating pressures encountered in R-410A, R-32, R-454B, and R-404A refrigeration and air conditioning systems.
The 45° flare joint achieves an intimate, large-area metal-to-metal contact between the flared tubing and the precision-machined brass cone. Because copper and brass have closely matched thermal expansion coefficients, temperature swings expand and contract both components harmoniously, maintaining constant clamping force without loosening.
No. The threads on a flare union tee are straight mechanical UNF threads designed exclusively to generate clamping force on the flare nut. Sealing occurs entirely on the 45-degree cone. Applying tape to the threads can prevent the nut from torquing properly and risk flaking contaminants into the system.
Forged tees are produced by compressing hot brass billets under extreme tonnage, refining the metallic grain structure and eliminating the porosity, blowholes, and inclusions common to sand castings. They also have vastly higher tensile and impact strength than fabricated brazed copper tees.
Pioneer Industries Brass Flare Union Tees are compatible with soft annealed copper tubing (ASTM B88, ASTM B280), aluminum tubing, and soft brass tubing flared to 45° according to SAE J512 / SAE J513 standards.
Yes. One of the main advantages of flare fittings is total reusability. You can loosen the flare nuts, disconnect the tubing, and reconnect new or modified flared lines to the same tee body without damaging the sealing surfaces, provided they remain clean and unmarred.
Torque requirements depend on tube diameter: 1/4" tube requires 10–15 ft-lbs, 3/8" tube requires 20–30 ft-lbs, 1/2" tube requires 35–50 ft-lbs, and 5/8" tube requires 50–65 ft-lbs. Use a backup wrench on the tee forged wrench pad to prevent bending the other tubing lines.
All fittings are manufactured under an ISO 9001:2015 certified quality management system. Shipments are supplied with EN 10204 Type 3.1 inspection certificates documenting chemical composition, tensile properties, and pneumatic/hydrostatic pressure test conformance.
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