High-Quality 180° Copper U-Bend Fittings

Short Description:

Product Specifications
Name： Pure Copper U-Bend Elbow (U-Shaped Return Bend)
Standard： ASME B16.22, ASTM B88, EN 1254-1, RoHS Compliant, REACH Compliant
Material： C11000 / C12200 Pure Copper (≥99.9% Cu)
Surface： Smooth, Clean, Ready for Soldering
Nominal Size： 1/4″ – 2″ (6mm – 54mm)
Center to Center Distance： Standard or Custom (e.g., 25mm – 100mm)
Wall Thickness： Type L / Type M / Custom
Product Features:
Excellent thermal conductivity for efficient heat exchange · Superior corrosion resistance and long service life · Perfect capillary action for strong, leak-free solder joints · Hygienic, lead-free and safe for all systems · Precise U-shape for compact coil design · High pressure rating and vibration resistance · Attractive natural copper appearance
Application Field:
HVAC and air conditioning coils, Refrigeration systems, Heat pumps and condensers, Solar thermal collectors, Medical gas pipelines, Industrial heat exchangers, Commercial cooling units, Custom coil manufacturing

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Pure Copper U-Bend Elbow – Process & Quality Assurance Statement

Our pure copper U-bend elbows are precision-formed to provide reliable, high-efficiency connections in compact heat exchange systems where thermal performance and leak-free integrity are critical.

Key process features

The complete production process ensures consistent quality and perfect geometry every time:
●Material Selection: Only certified high-purity copper tubes meeting ASTM B88 are used, with full mill certificates for traceability.
●Precision Bending: Tubes are cut to exact lengths and formed using CNC-controlled bending machines to achieve the accurate U-shape and center-to-center distance.
●Socket Machining: The socket ends are precision-machined to tight tolerances for optimal capillary soldering.
●Deburring & Cleaning: All internal and external burrs are removed, followed by thorough ultrasonic and chemical cleaning to eliminate any contaminants.
●Annealing (if required): Controlled atmosphere annealing restores ductility while maintaining mechanical strength.
●Final Inspection: Every elbow undergoes 100% visual, dimensional, and pressure testing before packaging.
●Packaging: Elbows are individually wrapped in protective film and packed in sturdy cartons to prevent damage during global shipping.

Quality control system

● Full traceability from raw copper tube lot to finished elbow
● Material certificates and inspection reports provided with every shipment
● Sample retention ≥3 years for third-party verification (SGS, BV, TÜV, etc.)
● 100% inspection of critical parameters:
• Chemical composition and purity (spectrometric analysis)
• Dimensional accuracy (CMM and go/no-go gauges; center-to-center and angle tolerance ±0.2mm / ±1°)
• Surface cleanliness and finish (visual and magnified inspection)
• Pressure tightness (air or hydrostatic test up to 3.0 MPa)
• Socket roundness and wall thickness uniformity
● Internal standards strictly exceed ASME B16.22 and ASTM B88 requirements. Typical C11000 properties:
Excellent solder joint strength, Thermal conductivity >390 W/m·K, Proven pressure rating up to 1000 PSI depending on size.
● ISO 9001:2015 certified facility ensures every pure copper U-bend elbow meets the highest standards of quality, reliability, and performance for your critical heat exchange systems.