Custom Pure Copper Straight Coupling Fittings

Short Description:

Product Specifications
Name： Pure Copper Straight Coupling
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″ – 4″ (6mm – 108mm)
Configuration： Equal Coupling or Reducing Coupling
Wall Thickness： Type L / Type M / Custom
Product Features:
Exceptional thermal conductivity for efficient heat transfer · Superior corrosion resistance and long service life · Perfect capillary action for strong, leak-free solder joints · Hygienic, lead-free and safe for drinking water · High pressure rating and vibration resistance · Excellent formability and dimensional stability · Attractive natural copper appearance
Application Field:
HVAC and air conditioning systems, Refrigeration and heat pump units, Plumbing and potable water lines, Medical gas pipelines, Solar thermal installations, Industrial process piping, Fire sprinkler systems, Custom manifold assemblies

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Pure Copper Straight Coupling – Process & Quality Assurance Statement

Our pure copper straight couplings are precision-manufactured to provide reliable, leak-free straight connections in high-performance piping systems where thermal efficiency and corrosion resistance are essential.

Key process features

The complete production process ensures consistent quality and perfect fit every time:
●Material Selection: Only certified high-purity copper tubes meeting ASTM B88 are used, with full mill certificates for traceability.
●Forming: Tubes are cut to precise lengths and formed using advanced hydraulic pressing or spinning technology to create the exact socket depths on both ends.
●Machining: Both socket ends are precision-machined to tight tolerances for optimal capillary soldering.
●Deburring & Cleaning: All internal and external burrs are completely 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 coupling undergoes 100% visual, dimensional, and pressure testing before packaging.
●Packaging: Couplings are individually wrapped in protective film and packed in sturdy cartons or pallets to prevent damage during global shipping.

Quality control system

● Full traceability from raw copper tube lot to finished coupling
● 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; socket depth tolerance ±0.2mm)
• 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 straight coupling meets the highest standards of quality, reliability, and performance for your critical piping systems.