ASTM B88 Seamless Copper Water Tube is a high-quality copper tubing designed for plumbing, air-conditioning, refrigeration, and gas distribution systems.
Manufactured according to ASTM B88 standards, this seamless copper tube provides excellent corrosion resistance, durability, and high thermal conductivity, ensuring long service life in both residential and commercial installations.
We supply Type K, Type L, and Type M Copper Water Tubes, available in hard drawn (rigid) and annealed (soft) tempers, suitable for underground, above-ground, and potable water systems.
Our ASTM B88 copper tubes are produced using seamless extrusion and drawing processes, ensuring uniform wall thickness, smooth surface finish, and superior leak-free performance.
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High Quality
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Advanced Equipment
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Professional Team
Products Description
| Standard | Material Designation | Temper | Typical Application |
|---|---|---|---|
| ASTM B88 | Seamless Copper Water Tube | Hard / Soft | Plumbing, HVAC, Gas, Water Lines |
Types Available:
Type K – Heaviest wall thickness, ideal for underground water services.
Type L – Medium wall thickness, common for interior plumbing and HVAC systems.
Type M – Light wall thickness, used for low-pressure water lines and drainage systems.
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| Copper (Cu) | 99.9 min |
| Phosphorus (P) | 0.015 – 0.040 |
| Other Elements | ≤ 0.1 total |
Mechanical Properties
| Property | Hard (H) | Soft (O) |
|---|---|---|
| Tensile Strength | 290 MPa | 210 MPa |
| Elongation (%) | 30 min | 40 min |
| Hardness (HV) | 80 – 100 | 50 – 70 |
| Density | 8.94 g/cm³ | 8.94 g/cm³ |
Advantages
💧 Excellent Corrosion Resistance – Ideal for potable water and underground service.
⚙️ High Strength & Durability – Withstands high internal pressure and long-term use.
🔥 Superior Thermal Conductivity – Perfect for HVAC and refrigeration systems.
🧰 Easy Fabrication & Installation – Can be bent, flared, and brazed easily.
🧱 Reliable Leak-Proof Joints – Suitable for soldering, brazing, or press-fit connections.
🌿 Environmentally Friendly & Recyclable – 100% recyclable material with long service life.
Standard Dimensions (ASTM B88)
| Normal size size (inch) | Outside Diametre (inch/mm) | Wall thickness (inch / mm) | Theoretic Weight (inch / mm) | ||||
|---|---|---|---|---|---|---|---|
| K | L | M | K | L | M | ||
| 1/4 | 0.375 (9.52) | 0.035 (0.889) | 0.03 (0.762) | - | 0.145 (0.215) | 0.126 (0.18) | - |
| 3/8 | 0.5 (12.7) | 0.049 (1.245) | 0.035 (0.762) | 0.025 (0.635) | 0.269 (0.399) | 0.198 (0.294) | 0.0145 (0.214) |
| 1/2 | 0.625 (15.88) | 0.049 (1.245) | 0.04 (0.889) | 0.028 (0.711) | 0.344 (0.51) | 0.285 (0.423) | 0.0204 (0.302) |
| 5/8 | 0.75 (19.05) | 0.049 (1.245) | 0.042 (1.016) | - | 0.418 (0.621) | 0.362 (0.537) | - |
| 3/4 | 0.875 (22.22) | 0.065 (1.651) | 0.045 (1.43) | 0.032 (0.812) | 0.641 (0.951) | 2.455 (0.675) | 0.328 (0.675) |
| 1 | 1.125 (28.58) | 0.065 (1.651) | 0.05 (1.27) | 0.035 (0.889) | 0.839 (1.245) | 0.655 (0.971) | 0.465 (0.689) |
| 11/4 | 1.375 (34.92) | 0.065 (1.651) | 0.055 (1.397) | 0.042 (1.067) | 1.04 (1.538) | 0.884 (1.311) | 0.628 (1.011) |
| 11/2 | 1.625 (41.28) | 0.072 (1.829) | 0.06 (1.524) | 0.049 (1.245) | 1.36 (2.02) | 1.14 (1.696) | 0.940 (1.396) |
| 2 | 2.125 (53.98) | 0.083 (2.108) | 0.07 (1.778) | 0.058 (1.437) | 2.06 (3.062) | 1.75 (2.599) | 1.46 (2.166) |
| 21/2 | 2.625 (66.68) | 0.095 (2.413) | 0.08 (2.032) | 0.065 (1.651) | 2.93 (4.342) | 2.84 (3.678) | 2.03 (3.006) |
| 3 | 3.125 (79.38) | 0.109 (2.769) | 0.09 (2.286) | 0.072 (1.829) | 4.00 (5.940) | 3.33 (4.935) | 2.68 (3.972) |
| 31/2 | 3.625 (92.08) | 0.12 (3.048) | 0.1 (2.54) | 0.083 (2.108) | 5.12 (7.598) | 4.29 (6.368) | 3.58 (5.31) |
| 4 | 4.125 (104.78) | 0.124 (3.404) | 0.11 (2.794) | 0.095 (2.413) | 6.51 (9.662) | 5.38 (7.979) | 4.66 (6.916) |
Packaging & Delivery
Standard export seaworthy packaging
Plastic caps at both ends, bundled or boxed
Wooden cases or pallets available
Custom labeling with size, type, and batch number
Fast delivery within 7–15 working days depending on order quantity
Quality Assurance
All copper tubes are manufactured and inspected according to ASTM B88 and ASME B16.22 standards.
Each shipment includes:
Mill Test Certificate (MTC)
Chemical Composition Report
Dimensional and Mechanical Test Data
We guarantee consistent quality, smooth surface finish, and accurate dimensions for every tube.
FAQ – Frequently Asked Questions
Q1: What is the difference between Type K, L, and M copper tubes?
A1: The main difference is wall thickness:
Type K (thickest) – used for underground and high-pressure systems.
Type L (medium) – used for general plumbing and HVAC.
Type M (lightest) – used for low-pressure and drainage systems.
Q2: Are ASTM B88 copper tubes suitable for drinking water?
A2: Yes, ASTM B88 copper tubes are lead-free and corrosion-resistant, meeting potable water standards.
Q3: What's the difference between ASTM B88 and ASTM B280?
A3: ASTM B88 is for water service copper tubing, while ASTM B280 is for air-conditioning and refrigeration copper tubing.
Q4: Can I order custom lengths or coil packaging?
A4: Yes, we offer custom cut-to-length service and soft annealed coils up to 30 meters or more per coil.
Q5: What countries do you supply?
A5: We supply ASTM B88 copper tubes to customers worldwide - including the USA, Europe, Middle East, and Asia - with fast global shipping.
contact us
📧 Email: office@dongmjd.com
📞 Phone / WhatsApp: +86 15769214734
We are a leading supplier of ASTM B88 Seamless Copper Water Tubes (Type K, L, M) for plumbing, HVAC, and industrial systems - providing high-quality, certified, and competitively priced copper tubing for global customers.
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