Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of astm b68 bright annealed seamless copper pipe in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
ASTM B68 Bright Annealed Seamless Copper Pipe is a high-quality copper tube manufactured through cold drawing and bright annealing under controlled atmosphere conditions.
This process produces a smooth, bright, and oxide-free inner and outer surface, ensuring excellent cleanliness, dimensional accuracy, and mechanical properties.
Complying with ASTM B68 / ASME SB68 standards, the bright annealed seamless copper pipe is widely used in air-conditioning, refrigeration, hydraulic, instrumentation, and precision engineering applications where high cleanliness and corrosion resistance are essential.
We supply ASTM B68 copper pipes in multiple grades such as C10200 (Oxygen-Free Copper) and C12200 (Phosphorus-Deoxidized Copper), available in straight lengths or coils.
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
Product Standards & Grades
| Standard | Material Grade | Process | Temper | Form |
|---|---|---|---|---|
| ASTM B68 / ASME SB68 | C10200, C12000, C12200 | Bright Annealed Seamless | Hard / Soft (H / O) | Straight Lengths / Coils |
ASTM B68 Bright Annealed Seamless Copper Pipe – Standard Dimensions
| Outside Diameter (OD) | Wall Thickness (WT) | Standard Length | Remarks / Form |
|---|---|---|---|
| 3.00 mm | 0.30 mm | 5 m – 6 m | Coil or Straight |
| 4.76 mm (3/16") | 0.40 mm | 5 m – 6 m | Coil or Straight |
| 6.35 mm (1/4") | 0.50 mm | 5 m – 6 m | Coil or Straight |
| 9.52 mm (3/8") | 0.60 mm | 5 m – 6 m | Coil or Straight |
| 12.70 mm (1/2") | 0.71 mm | 5 m – 6 m | Coil or Straight |
| 15.88 mm (5/8") | 0.81 mm | 5 m – 6 m | Coil or Straight |
| 19.05 mm (3/4") | 0.91 mm | 5 m – 6 m | Straight Length |
| 22.22 mm (7/8") | 1.02 mm | 5 m – 6 m | Straight Length |
| 25.40 mm (1") | 1.12 mm | 5 m – 6 m | Straight Length |
| 28.58 mm (1-1/8") | 1.22 mm | 5 m – 6 m | Straight Length |
| 31.75 mm (1-1/4") | 1.32 mm | 5 m – 6 m | Straight Length |
| 34.92 mm (1-3/8") | 1.42 mm | 5 m – 6 m | Straight Length |
| 38.10 mm (1-1/2") | 1.52 mm | 5 m – 6 m | Straight Length |
| 42.00 mm | 1.65 mm | 5 m – 6 m | Straight Length |
| 50.80 mm (2") | 1.83 mm | 5 m – 6 m | Straight Length |
| 54.00 mm | 2.00 mm | 5 m – 6 m | Straight Length |
| 63.50 mm (2-1/2") | 2.29 mm | 5 m – 6 m | Straight Length |
| 76.20 mm (3") | 2.50 mm | 5 m – 6 m | Straight Length |
| 88.90 mm (3-1/2") | 3.00 mm | 5 m – 6 m | Straight Length |
| 101.60 mm (4") | 3.20 mm | 5 m – 6 m | Straight Length |
Dimensional Tolerances (Typical per ASTM B68)
Outside Diameter: ±0.05 mm (≤25 mm OD), ±0.10 mm (>25 mm OD)
Wall Thickness: ±10%
Length: ±10 mm
Available Forms
Bright Annealed Straight Pipes: Lengths of 1 m to 6 m
Bright Annealed Coils: 15 m – 30 m per coil (annealed temper)
Custom Sizes: Available upon request (special OD/WT combinations and tight tolerances)
All tubes are bright annealed in a controlled atmosphere furnace, ensuring oxide-free internal and external surfaces.
Tubes may be nitrogen-filled and sealed with plastic caps for oxygen or refrigerant use.
Conforms to ASTM B68 / ASME SB68 dimensional and tolerance standards.
Chemical Composition (Typical)
| Element | C10200 (%) | C12200 (%) |
|---|---|---|
| Copper (Cu) | 99.95 min | 99.9 min |
| Phosphorus (P) | – | 0.015 – 0.040 |
| Oxygen (O) | ≤ 0.001 | ≤ 0.040 |
| Others | ≤ 0.05 | ≤ 0.05 |
Mechanical Properties
| Property | Hard (H) | Soft (O) |
|---|---|---|
| Tensile Strength (MPa) | 250 – 310 | 200 – 240 |
| Elongation (%) | ≥ 25 | ≥ 35 |
| Hardness (HV) | 70 – 100 | 50 – 70 |
| Density (g/cm³) | 8.9 | 8.9 |
Products Advantages
✨ Bright & Smooth Surface – Mirror-like finish, oxide-free inside and outside.
⚙️ High Dimensional Precision – Tight tolerances suitable for automated assembly.
💧 Excellent Cleanliness – Ideal for refrigerant, oxygen, and hydraulic fluid systems.
⚡ Superior Conductivity – High electrical and thermal conductivity.
🧊 Good Corrosion Resistance – Stable in moisture, gases, and mild industrial environments.
🔧 Easy Formability & Weldability – Suitable for bending, flaring, and brazing.
Products Surface
Inside and outside surfaces are bright, smooth, and free from oxidation or scaling.
No grease, oil, or residue - suitable for oxygen and refrigerant systems.
Optionally available with nitrogen filling and plastic end caps to prevent contamination.
Packaging & Delivery
Protective plastic caps on both ends
Packed in plastic film, bundles, or wooden boxes
Nitrogen-filled packaging available for medical or refrigeration applications
Custom labeling with size, grade, and heat number
Fast delivery: 7–15 working days depending on quantity
Quality Assurance
All products comply with ASTM B68 / ASME SB68 standards and are inspected before shipment:
100% Eddy Current or Hydrostatic Testing
Dimensional Accuracy & Surface Inspection
Chemical Composition & Mechanical Property Test
Mill Test Certificate (MTC) provided with each batch
FAQ – Frequently Asked Questions
Q1: What is the main difference between ASTM B68 and ASTM B75 copper tubes?
A1: ASTM B68 specifies bright annealed seamless copper tubes with a bright, oxide-free surface, while ASTM B75 covers seamless copper tubes with standard annealing and surface finish.
Q2: What does "bright annealed" mean?
A2: "Bright annealed" means the tube is heat-treated in a controlled atmosphere to achieve a shiny, oxide-free surface both inside and outside.
Q3: Is ASTM B68 suitable for refrigeration and oxygen lines?
A3: Yes. ASTM B68 tubes are ideal for refrigerant, oxygen, and high-purity gas applications due to their clean internal surfaces.
Q4: Which copper grades are available for ASTM B68?
A4: Common grades include C10200 (Oxygen-Free Copper) and C12200 (Phosphorus-Deoxidized Copper).
Q5: Can I order custom coil lengths or nitrogen-filled packaging?
A5: Absolutely. We offer custom coil lengths, nitrogen-filled tubes, and OEM labeling upon request.
contact us
📧 Email: office@dongmjd.com
📞 Phone / WhatsApp: +86 15769214734
We are a trusted manufacturer and supplier of ASTM B68 Bright Annealed Seamless Copper Pipes (C10200 / C12200) - providing precision, high-purity, and corrosion-resistant copper tubing for HVAC, refrigeration, and industrial applications worldwide.
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