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Size range and international standards of C12200 copper tube:
1. Size range
Outer diameter range
The outer diameter spans a wide range in different application scenarios:
Conventional pipes: 6mm (1/4 inch) to 108mm (4 inches), some suppliers provide 1/8 inch (about 3.2mm) to 8 inches (about 203mm).
Air conditioning and refrigeration (ASTM B280): 6.35mm (1/4 inch) to 105mm (4 1/8 inches).
Special industrial applications: Some standards cover the outer diameter limit to 328mm or 150mm
, or even 914mm (need to confirm whether it is a customized product).
Wall thickness range
Common wall thickness is 0.25mm to 8mm, which is adjusted according to the standard type:
ASTM B88 (water/gas): Type K, L, and M are provided. For example, a 1/2-inch pipe corresponds to a wall thickness of 0.049 inches (1.24mm) to 0.145 inches (3.68mm).
Air conditioning and refrigeration (ASTM B280): Wall thickness 0.635mm to 2.79mm.
Length
The standard straight pipe length is usually 12 feet (3.7 meters) to 20 feet (6 meters), and the coiled pipe length can reach 20 meters to 50 meters (such as annealed hose for refrigeration).
2. International standards
The international standards followed by C12200 copper tubes include:
ASTM standards:
ASTM B42: Seamless copper tube standard, suitable for general engineering.
ASTM B75: General standard for seamless copper tubes, covering applications such as medical gases.
ASTM B88: Copper tube standard for water supply, gas and sanitary systems, divided into Type K/L/M.
ASTM B280: Seamless copper tube standard for air conditioning and refrigeration systems.
European standards:
EN 1057: Covers copper tube dimensions and mechanical properties, corresponding to the material Cu-DHP (ie C12200).
EN 12735: Applicable to copper tubes for heat exchangers.
Chinese standards:
GB/T 5231-2012, GB/Y1527-2017: Corresponding to grade TP2 (C12200), outer diameter 3mm to 328mm.
GB/T 20928-2020 (seamless internally threaded copper tube): included in the C12200 grade.
Other standards:
AS 1432 (Australia), JIS H3300 (Japan), DIN 1754/8905 (Germany), etc.
Chemical composition
Main ingredients:
Copper (Cu): ≥99.90%
Phosphorus (P): 0.015%~0.040%, used for deoxidation and improving processing performance
Impurity restrictions:
Lead (Pb) ≤0.005%, Iron (Fe) ≤0.005%, Sulfur (S) ≤0.005%, Arsenic (As) ≤0.002%, Bismuth (Bi) ≤0.001%, etc. The total amount of impurities is strictly controlled below 0.05%.
Mechanical properties
Mechanical properties vary significantly depending on the material state (such as annealed state, hard-drawn state):
Annealed state (O60, etc.):
Tensile strength: 205-275 MPa
Yield strength: 69-100 MPa
Elongation: ≥25%-45%
Hardness: 55-100 HV.
Hard-drawn state (H80, etc.):
Tensile strength: 250-410 MPa
Yield strength: 220-400 MPa
Elongation: 5%-10% (lower in hard state)
Hardness: 75-125 HV.
Other general properties:
Elastic modulus: 117-132 GPa
Shear modulus: 43 GPa
Poisson's ratio: 0.34
Density: 8.94-9.0 g/cm³.
Special state examples
H040/R200 state (semi-hard state): tensile strength 200-250 MPa, elongation ≥42%.
H110/R360 state (full hard state): tensile strength ≥360 MPa, elongation ≥5%.
Key characteristics
Electrical conductivity/thermal conductivity: electrical conductivity 79%~85% IACS, thermal conductivity 340 W/m·K, close to the level of pure copper.
Corrosion resistance: resistant to soil, non-oxidizing acid and salt water corrosion, suitable for pipelines and marine environments.
Processability: excellent ductility in annealed state, hard state suitable for high-strength demand scenarios.
Production process and product advantages of C12200 copper tube:
Production process
Raw material processing and smelting
Use high-quality pure electrolytic copper (such as cathode copper) as raw material, eliminate recycling waste, and ensure high purity (Cu+Ag≥99.9%).
Add phosphorus copper alloy for deoxidation treatment, with a phosphorus content of about 0.015%-0.040%, to form phosphorus deoxidized copper (DHP) to improve welding performance and reduce the risk of hydrogen embrittlement.
Forming process
Continuous casting and rolling: Horizontal continuous casting process is adopted, with a melting temperature of about 1200℃, and copper tube billets are formed after water cooling to 50℃. Subsequent processing through planetary rolling, triple drawing, coil drawing and other processes ensures the dimensional accuracy of the tube.
Drawing and cold processing: Cold drawing technology is used to refine the diameter and wall thickness of the tube, and some processes are combined with cold rolling (such as cold rolled coil) to improve the surface quality.
Post-processing
Annealing: Online annealing process (such as soft annealing) is used to eliminate work hardening, restore ductility, and adapt to different application requirements (such as soft state, hard state).
Surface treatment: including polishing, mirror, oil polish and other methods. Some products are non-destructively tested to ensure zero damage points.
Product advantages
Excellent physical and chemical properties
Corrosion resistance: anti-pitting in harsh climates and water, suitable for corrosive environments such as marine engineering and chemical coolers.
High temperature and high pressure resistance: mechanical properties are stable at high temperatures, and pressure resistance far exceeds that of plastic pipes, suitable for hot water systems (such as solar energy and air conditioning cooling).
Thermal conductivity and electrical conductivity: outstanding thermal conductivity (used in heat exchangers and radiators), but the electrical conductivity is reduced to about 70-75% IACS due to phosphorus deoxidation treatment, which is still better than most alloys.
Processing and use advantages
Welding and cold bending performance: phosphorus deoxidation significantly improves brazing and welding performance, cold bending is convenient, and suitable for complex pipeline layout.
Connection firmness: Physical properties match when connected with copper fittings, reducing the risk of leakage, suitable for high-pressure gas/liquid transportation.
Long life and low maintenance: The material is resistant to aging and creep, and the linear expansion coefficient is only 7-15% of other materials, with a service life of up to decades.
Safety and environmental protection characteristics
Safety: No toxic gas is released (also safe in fire), UV-resistant and rodent-resistant, suitable for construction and remote areas.
Environmental protection: The material is recyclable and the production process complies with international standards such as ISO and ASTM.
Wide application
Covering air conditioning and refrigeration, heat exchangers, petrochemicals, shipbuilding, building curtain walls and other fields.
Flexible customization: Supports customization of outer diameter (0.2mm-914mm), wall thickness (0.5mm-80mm) and length (1-12m) to meet diverse needs.
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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