Seamless Copper Tubes

Seamless Copper Tubes

High Purity Seamless Copper Tubing for Air Conditioning & Refrigeration

Vulroc seamless copper tubes are manufactured using high purity cathode copper (≥99.90%), ensuring excellent formability, brazing performance, and corrosion resistance. These tubes are widely used in air conditioning, refrigeration systems, and heat transfer applications.

With controlled grain structure, tight dimensional accuracy, and 100% eddy current testing, Vulroc seamless copper tubes provide reliable performance for bending, brazing, and expanding operations.

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Technical Specification

Standard: JIS H3300
Material Grade: C1220 (Cu-DHP)

Chemical Composition

Element Requirement
Cu + Ag ≥ 99.90%
P 0.015 – 0.040%

Mechanical Properties

Property Value
Temper Annealed O / H
Tensile Strength ≥ 205 MPa
Elongation ≥ 40% (50mm)
Rockwell Hardness HR15T ≤ 60
Grain Size 0.025 – 0.060 mm

Key Features

  • High purity copper ≥99.90%
  • Excellent brazing and soldering performance
  • Smooth inner and outer surface
  • Controlled grain size
  • Excellent bending performance
  • Suitable for expansion forming
  • Tight dimensional tolerance
  • Ideal for HVAC applications

Non-Destructive Testing

All Vulroc seamless copper tubes are 100% eddy current tested according to:

  • ASTM E243
  • JIS H0502

Defect detection sensitivity:

OD Range Drill Hole Size
Ø 4 – 10 mm 0.9 mm
Ø 10 – 20 mm 1.0 mm
Ø 20 – 30 mm 1.1 mm

Microstructure Control

Grain size is tested according to JIS H0501, ensuring:

  • No cracking during brazing
  • Excellent bending performance
  • Good expanding properties
  • Stable mechanical performance

Laboratory Testing

Vulroc seamless copper tubes are tested for:

  • Chemical composition
  • Mechanical properties
  • Tensile strength
  • Elongation
  • Hardness
  • Flareability
  • Flattenability
  • Non-destructive testing
  • Hydrostatic testing

Safe Working Pressure

Safe working pressure is calculated for temperature range:

40°C – 200°C

Formula:

P = 2St / D

Where:

  • P = Test hydrostatic pressure (MPa)
  • S = Design stress value
  • t = Minimum wall thickness (mm)
  • D = Outer diameter (mm)

Conversion:

  • 1 bar = 0.1 MPa
  • 1 MPa = 145 psi
  • Design stress S = 41 N/mm²

Pancake Copper Coil

JIS H3300 C1220 – O

OD (mm) Inch WT Options (mm) Length Packing
6.35 1/4 0.51–0.71 15 m 12 coils
9.52 3/8 0.51–0.81 15 m 9 coils
12.70 1/2 0.51–0.91 15 m 7 coils
15.88 5/8 0.56–0.91 15 m 5 coils
19.05 3/4 0.61–0.91 15 m 4 coils

Straight Copper Pipe

JIS H3300 C1220 – H

OD (mm) Inch WT (mm) Length Packing
9.52 3/8 0.71–0.91 5.8 m 25 pcs
12.70 1/2 0.71–0.91 5.8 m 25 pcs
15.88 5/8 0.71–0.91 5.8 m 25 pcs
19.05 3/4 0.71–0.91 5.8 m 20 pcs
22.22 7/8 0.71–0.91 5.8 m 20 pcs
28.58 1-1/8 0.71–1.22 5.8 m 12 pcs
34.93 1-3/8 0.71–1.22 5.8 m 7 pcs
41.28 1-5/8 0.71–0.91 5.8 m 7 pcs

Applications

Vulroc seamless copper tubes are widely used in:

Air Conditioning

  • Split air conditioners
  • Central air conditioning
  • VRF systems
  • HVAC equipment

Refrigeration

  • Condensers
  • Evaporators
  • Refrigeration units
  • Cooling coils

Heat Exchangers

  • Copper heat exchangers
  • Fin coil systems
  • Cooling systems

Why Choose Vulroc Seamless Copper Tubes

  • High purity cathode copper raw material
  • Excellent brazing performance
  • Controlled grain structure
  • 100% eddy current testing
  • Smooth surface finish
  • Stable mechanical properties
  • Tight tolerance
  • Fast delivery

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