Pioneer Industries is an internationally recognized manufacturer and exporter of forged Brass Flare Union Elbows, engineered to join two 45° flared tubing lines at a precise 90-degree right angle in high-pressure refrigeration, HVAC, and pneumatic piping circuits.
The Brass Flare Union Elbow manufactured by Pioneer Industries is a premium 90-degree tube-to-tube coupling fitting engineered for high-pressure fluid and gas distribution circuits. Featuring two perpendicular precision CNC-machined 45° SAE male flare cones, this forged elbow allows piping designers to navigate sharp 90-degree corners, bypass chassis obstacles, and route tubing around equipment frames with zero risk of tube kinking or flow cross-section reduction.
Manufactured in strict accordance with SAE J512, SAE J513, and ASME B16.26 standards, each union elbow is hot-forged from BS 218 / CW617N brass alloy. The hot forging process aligns the metallic grain structure along the 90° curve, imparting superior tensile strength, high burst safety factors, and immunity to wall porosity under pulsating operating pressures and thermal cycling.
Pioneer Industries exports Brass Flare Union Elbows to commercial refrigeration manufacturers, air conditioning OEMs, mobile hydraulics builders, and marine engineering contractors across more than 85 countries worldwide. With massive inventory stocks in Mumbai, India, we ensure rapid dispatch on all standard fractional and metric configurations.
Every forged union elbow is manufactured under an ISO 9001:2015 certified quality management system using high-precision CNC machining centers. All dispatches are supported by EN 10204 Type 3.1 material test certificates and comprehensive 100% pneumatic leak test documentation.
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Bending soft copper tubing by hand to tight 90-degree radii often results in tube wall flattening, localized thinning, and restricted fluid flow. Pioneer Industries’ Brass Flare Union Elbow eliminates this problem by providing a rigid, precision-cast 90° turn with smooth internal sweeping radii that preserve laminar flow and minimize pressure drops across high-velocity refrigerant vapor and liquid lines.
The heavy forged brass body incorporates wide wrench pads at the corner, giving mechanics positive purchase during flare nut tightening without bending the adjacent tubing runs. The 100% metal-to-metal flare seal operates reliably across extreme temperatures from -54°C to +121°C without synthetic gaskets or O-rings.
Pioneer Industries manufactures Brass Flare Union Elbows in standard fractional sizes from 1/8" to 3/4" tube OD, with reducing combinations available upon request. Operating pressures up to 4,000 PSI (276 bar). Conforms to SAE J512, SAE J513, ASME B16.26, and BS EN 12165 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) | Both Flare Ports (UNF) | Center-to-End (A) | Center-to-End (B) | Wrench Flat (W) | Weight (approx) | Working Pressure |
|---|---|---|---|---|---|---|---|
| PI-FUE-02 | 1/8" | 5/16-24 UNF | 0.69" | 0.69" | 7/16" | 26 g | 4,000 PSI |
| PI-FUE-03 | 3/16" | 3/8-24 UNF | 0.75" | 0.75" | 7/16" | 34 g | 4,000 PSI |
| PI-FUE-04 | 1/4" | 7/16-20 UNF | 0.88" | 0.88" | 9/16" | 48 g | 4,000 PSI |
| PI-FUE-05 | 5/16" | 1/2-20 UNF | 0.94" | 0.94" | 5/8" | 62 g | 3,800 PSI |
| PI-FUE-06 | 3/8" | 5/8-18 UNF | 1.06" | 1.06" | 3/4" | 84 g | 3,500 PSI |
| PI-FUE-08 | 1/2" | 3/4-16 UNF | 1.25" | 1.25" | 7/8" | 125 g | 3,000 PSI |
| PI-FUE-10 | 5/8" | 7/8-14 UNF | 1.44" | 1.44" | 1-1/16" | 185 g | 2,500 PSI |
| PI-FUE-12 | 3/4" | 1-1/16-14 UNS | 1.62" | 1.62" | 1-1/4" | 280 g | 2,000 PSI |
| Part No. | Tube O.D. (mm) | Thread Profile (UNF) | Center-to-End (mm) | Center-to-End (mm) | Wrench Flat (mm) | Weight (g) | Working Pressure (bar) |
|---|---|---|---|---|---|---|---|
| PI-FUE-M06 | 6 mm | 7/16-20 UNF | 22.4 mm | 22.4 mm | 14 mm | 48 g | 276 bar |
| PI-FUE-M08 | 8 mm | 1/2-20 UNF | 23.8 mm | 23.8 mm | 16 mm | 62 g | 262 bar |
| PI-FUE-M10 | 10 mm | 5/8-18 UNF | 27.0 mm | 27.0 mm | 19 mm | 84 g | 241 bar |
| PI-FUE-M12 | 12 mm | 3/4-16 UNF | 31.8 mm | 31.8 mm | 22 mm | 125 g | 206 bar |
| PI-FUE-M16 | 16 mm | 7/8-14 UNF | 36.5 mm | 36.5 mm | 27 mm | 185 g | 172 bar |
| PI-FUE-M18 | 18 mm | 1-1/16-14 UNS | 41.1 mm | 41.1 mm | 32 mm | 280 g | 138 bar |
| Component | Material Specification | Standard Specification | Chemical Composition | Mechanical Properties | Temperature Limits | Key Features |
|---|---|---|---|---|---|---|
| Hot Forged Elbow 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 Union Elbow fittings find deployment across demanding thermal, fluid, and gas piping circuits:
Routs copper lines around sharp internal chassis corners inside condensing units and freezers.
Connects distribution tubes to evaporator coil headers at clean right angles without tube crimping.
Navigates vehicle frames and generator enclosures in liquefied petroleum gas installations.
Connects hydraulic pilot lines at 90 degrees inside compact power unit enclosures.
Provides neat right-angle tubing transitions inside industrial automation control cabinets.
Connects seawater cooling tubes around marine engine blocks and bulkhead penetrations.
Provides clean right-angle transitions on CO2 and beverage distribution racks.
Connects refrigerant line-sets around trailer chassis and reefer compressor compartments.
Pioneer Industries’ Brass Flare Union Elbow 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 Union Elbow.
A Brass Flare Union Elbow is a 90-degree forged brass fitting with two identical 45° SAE male flare connections. It is designed to connect two flared copper or brass tubes at a right angle, providing a clean turn without kinking or flattening the tubing.
Bending copper tubing to a tight 90-degree radius often flattens the tube cross-section, which restricts fluid flow and increases pressure drop. In tight enclosures where standard bend radii cannot fit, a forged union elbow provides a compact right-angle turn with a full-flow internal core.
Depending on nominal tube size, working pressure ratings range from 2,000 PSI (138 bar) for 3/4" tubing to 4,000 PSI (276 bar) for 1/4" tubing, backed by an engineered 4:1 minimum safety burst factor.
The elbow features precision CNC-machined 45° male flare cones on both ports. When standard flare nuts are tightened, the flared copper tube lips are compressed against the brass cones, creating an impervious metal-to-metal wedge seal that requires zero thread sealant or elastomeric O-rings.
Yes. Pioneer Industries’ Brass Flare Union Elbows are hot-forged with dense, heavy walls rated for continuous service in R-410A, R-32, R-404A, and R-134a systems across operating temperatures from -54°C to +121°C.
Hot forging creates a continuous, unbroken metallic grain flow that follows the contour of the 90-degree bend. This eliminates internal voids, porosity, and weak structural planes that can occur in cast fittings or fittings machined from square bar.
Standard tightening torque values: 1/4" tube: 10–15 ft-lbs (14–20 N-m); 3/8" tube: 20–30 ft-lbs (27–41 N-m); 1/2" tube: 35–50 ft-lbs (47–68 N-m); 5/8" tube: 50–65 ft-lbs (68–88 N-m). Always use a wrench on the elbow wrench pad to counter-hold.
Yes. Pioneer Industries manufactures reducing flare union elbows (e.g. 3/8" flare on one port and 1/4" flare on the other) to connect two different tube diameters at 90 degrees without auxiliary adapters.
Yes. The all-metal 45° flare joint can be disassembled and reconnected multiple times without compromising seal performance, provided the brass cones remain clean, smooth, and unmarred.
Every production lot undergoes 100% pneumatic underwater bubble testing, optical CMM dimensional inspection, and destructive hydrostatic burst sampling. All shipments are supplied with EN 10204 Type 3.1 inspection certificates.
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