Seamless Copper Heat Exchanger Tube
Henan Gnee New Material Co., Ltd. is one of the most professional manufacturers and suppliers of seamless copper heat exchanger tube in China, specialized in providing high quality copper products with competitive price. Welcome to buy discount seamless copper heat exchanger tube for sale here from our factory. Customized orders are welcome.
Seamless Copper Heat Exchanger Tubes (ASTM B111)
Seamless copper heat exchanger tubes are high-performance copper alloy tubes manufactured without welding seams, offering superior strength, corrosion resistance, and reliability for HVAC, marine, power plant, and industrial heat exchange systems.
We supply ASTM B111 seamless copper heat exchanger tubes in a wide range of alloys, sizes, and temper conditions, supporting both standard and custom engineering requirements.
No weld seam → higher pressure reliability
Excellent thermal conductivity
Superior corrosion resistance in seawater & HVAC environments
Suitable for condenser, evaporator & shell & tube heat exchangers
Available in straight tubes & U-bend configurations
Seamless vs Welded Copper Tube – What Is the Difference for Heat Exchangers?
| Factor | Seamless Copper Tube | Welded Copper Tube |
|---|---|---|
| Pressure resistance | Excellent | Medium |
| Corrosion resistance | Higher | Medium |
| Failure risk | Very low | Higher (seam weld area) |
| Cost | Higher | Lower |
| Heat exchanger use | Critical systems | General HVAC |
Choose seamless copper tubes for:
Marine environments
High-pressure condensers
Power plant systems
Seawater heat exchangers
Choose welded tubes for:
Low-pressure HVAC systems
Cost-sensitive applications
Standards for Seamless Copper Heat Exchanger Tubes
We produce seamless copper heat exchanger tube to the following international specifications. Each standard has specific requirements for chemistry, mechanical properties, dimensions, and testing.
| Standard | Jurisdiction | Typical Application | Key Requirements |
|---|---|---|---|
| ASTM B111 | United States (ASTM) | heat exchanger condenser, shell and tube heat exchanger, evaporators | Eddy current testing, chemical limits, mechanical properties |
| ASME SB111 | United States (ASME Boiler Code) | heat exchanger boiler, pressure vessels requiring ASME stamp | Identical to ASTM B111 but listed in ASME Code |
| EN 12451 | Europe | heat exchanger hvac, industrial heat exchangers | Dimensional tolerances, mechanical testing, certification |
| JIS H3300 | Japan | Marine shell tube evaporator, power plant condensers | Copper and copper alloy seamless tubes for heat exchangers |
We provide ASTM B111 pdf and ASME SB111 pdf upon request. For projects in copper heat exchanger tube Europe or copper heat exchanger tube Germany, we supply EN 12451 certification. For copper heat exchanger tube Japan or Southeast Asia, JIS H3300 is available.
Which Alloys Are Available for Seamless Copper Heat Exchanger Tubes?
Our seamless copper heat exchanger tube is available in all ASTM B111 copper alloys. The table below shows the most common selections.
| Alloy | Common Name | Key Property | Best Application | Relative Cost |
|---|---|---|---|---|
| ASTM B111 C12200 | Phosphorus Deoxidized Copper | Highest thermal conductivity | heat exchanger hvac, clean water heat exchanger boiler, copper tube heat exchanger | Lowest |
| ASTM B111 C44300 | Admiralty Brass | Dezincification resistant | heat exchanger condenser with brackish cooling water | Low |
| ASTM B111 C68700 | Aluminum Brass | High-velocity seawater resistance | shell tube evaporator systems, marine cooling | Medium |
| ASTM B111 C70600 | Copper Nickel 90/10 | General seawater corrosion resistance | C70600 tube for naval and offshore shell and tube heat exchanger | Medium-High |
| ASTM B111 C71500 | Copper Nickel 70/30 | Extreme corrosion resistance | C71500 tube for sour gas, high-temperature seawater, long life expectancy | Highest |
Manufacturing Process of Seamless Copper Heat Exchanger Tubes
Our production process ensures stable mechanical performance and dimensional precision:
What are the common configurations for Copper Heat Exchanger Tubes?
Depending on your equipment design, you may require straight lengths or specialized bends. As a primary copper heat exchanger tube factory, we provide:
U Tube Heat Exchanger: Precision-bent tubes designed for high-pressure boilers.
U Tube Bundle Heat Exchanger: Fully assembled or loose tubes ready for heat exchanger tube rolling into the tubesheet.
Shell and Tube Heat Exchanger: Standard seamless copper tubing heat exchanger lengths for industrial cooling.
U Tube Condenser: Custom-bent solutions for shell tube evaporator and refrigeration units.
Our fabrication process includes rigorous heat exchanger tube expansion testing to ensure that when the tube is fixed to the heat exchanger tube sheet, the seal is vacuum-tight and leak-proof.
Sizes & Dimensions of Seamless Copper Tubes
We stock and manufacture seamless copper heat exchanger tube in a wide range of dimensions. Below are our standard offerings.
Outer Diameter (OD)
| Inch Size | Metric Equivalent | Stock Status | Common Application |
|---|---|---|---|
| 5/8 inch | 15.88mm | In stock | heat exchanger hvac, automotive heat exchanger car |
| 3/4 inch | 19.05mm | In stock | copper heat exchanger tube od 19mm – most common for HVAC |
| 1 inch | 25.4mm | In stock | heat exchanger boiler, industrial shell and tube heat exchanger |
| 1.25 inch | 31.75mm | Made to order | Power plant heat exchanger condenser |
| 1.5 inch | 38.1mm | Made to order | Heavy duty shell tube evaporator |
Wall Thickness
Copper heat exchanger tube wall thickness ranges from 0.5mm to 3.0mm. Common stocked thicknesses:
0.7mm – Light duty HVAC, heat exchanger air systems
1.0mm – Standard heat exchanger hvac and heat exchanger condenser
1.2mm – Medium pressure heat exchanger boiler
1.5mm – High pressure shell and tube heat exchanger
2.0mm – Marine C70600 tube applications
Length
Copper heat exchanger tube length from 1m to 30m:
6 meters – Standard stock length
9 meters – Available upon request
12 meters – Available upon request
Cut to exact length – For u tube heat exchanger or direct replacement
Tolerances
All seamless copper heat exchanger tube meets ASTM B111 pdf tolerances:
OD tolerance: ±0.05mm for sizes up to 25mm
Wall thickness tolerance: ±0.03mm to ±0.08mm depending on nominal thickness
Length tolerance: +3mm / -0mm for cut lengths
For heat exchanger tube rolling and heat exchanger tube expansion applications, we can hold half of ASTM tolerance upon request.
Applications of Seamless Copper Heat Exchanger Tubes
HVAC Chillers & Air Conditioning Systems
Typical Alloy: C12200 (DHP Copper)
Tube Form: Straight tube / U-bend tube
Surface Finish: Bright annealed (BA) / Cleaned & capped
Heat Treatment: Fully annealed (O60) for optimal ductility
Shell & Tube Heat Exchangers
Typical Alloy: C12200 / C70600 (Copper Nickel 90/10)
Tube Form: Straight heat exchanger tubes
Surface Finish: Pickled & cleaned / Mill finish
Heat Treatment: Annealed or stress-relieved condition
Marine Heat Exchangers
Typical Alloy: C70600 / C71500 (Copper Nickel 70/30)
Tube Form: Straight tube / U-bend tube
Surface Finish: Pickled, descaled, anti-fouling optional coating
Heat Treatment: Fully annealed for corrosion resistance stability
Power Plant Condensers
Typical Alloy: C12200 / C70600
Tube Form: Straight condenser tubes
Surface Finish: Bright annealed / Controlled cleaned surface
Heat Treatment: Soft annealed condition (O60)
Desalination Systems
Typical Alloy: C71500 (Copper Nickel 70/30)
Tube Form: Straight / U-bend heat exchanger tubes
Surface Finish: Pickled & passivated
Heat Treatment: Fully annealed for maximum toughness and corrosion resistance
Industrial Refrigeration
Typical Alloy: C12200 / C44300 (Admiralty Brass)
Tube Form: Straight tube / U-bend configuration
Surface Finish: Bright annealed / Cleaned & dried
Heat Treatment: Soft annealed (O60 condition)
How to Bend, Roll, and Expand Seamless Copper Heat Exchanger Tubes?
Seamless tubes behave differently than welded tubes during fabrication. Here is what you need to know.
How to bend copper heat exchanger tube (seamless)
Seamless tube bends more uniformly than welded tube because there is no seam to buckle. For a u tube heat exchanger, use a mandrel bender with a minimum bend radius of 1.5 x OD. For copper heat exchanger tube od 19mm (3/4 inch), the minimum centerline radius is 28.5mm.
How to weld copper heat exchanger tube (seamless)
Welding is rarely required for seamless tubes in heat exchanger service. Brazing with BCuP-5 filler is preferred. If welding is necessary, use deoxidized filler rod, purge with argon, and avoid overheating the thin wall section.
Heat exchanger tube rolling and expansion
Seamless tubes are ideal for heat exchanger tube rolling and heat exchanger tube expansion because the uniform wall thickness produces consistent tube-to-sheet joints. Use a rolling torque calculator to avoid over-rolling, which thins the tube wall at the tube sheet.
Heat exchanger tube pitch and tube sheet design
For a shell and tube heat exchanger using seamless tubes, the tube pitch is typically 1.25 x tube OD. For copper heat exchanger tube 1 inch, the pitch is 31.75mm center-to-center.
Quality Control & Testing
| Test Item | Standard | Purpose |
|---|---|---|
| Eddy Current Testing | ASTM E243 | Detect surface defects |
| Hydrostatic Test | ASTM B111 | Pressure integrity validation |
| Chemical Composition | ASTM E53 | Material verification |
| Mechanical Testing | ASTM E8 | Tensile strength & elongation |
| Dimensional Inspection | Internal spec | OD & wall thickness accuracy |
Available certification:
EN10204 3.1 Mill Test Certificate
Third-party inspection (SGS / BV upon request)
How Do We Package Copper Heat Exchanger Tubes for Global Delivery?
| Packaging Stage | Material / Method | Purpose |
|---|---|---|
| Individual Tube Protection | Anti-rust VCI paper + plastic end caps | Prevents moisture, dust, and scratches on copper tube heat exchanger inner surfaces. |
| Bundling | Nylon straps + wooden spacers | Keeps copper heat exchanger tube OD 19mm, 1 inch, or 5/8 inch sizes organized and vibration-free. |
| Moisture Barrier | Thick PE film wrap (heat-shrunk) | Blocks humidity during long sea voyages to copper heat exchanger tube Germany or Saudi Arabia. |
| Outer Packing | Export-grade plywood cases or steel-banded wooden crates | Withstands stacking and rough handling. Each crate labeled with PO number, alloy (e.g., SB111 C70600), and quantity. |
| Documentation | Packing list + Mill Test Certificate (MTC) attached outside | Customs clearance support for copper heat exchanger tube stockist and distributor partners. |
For U-Bundle Orders: U tube heat exchanger and U tube bundle heat exchanger are placed in dedicated steel jigs inside the crate to prevent bending radius distortion.
Our Factory & Equipment
| Equipment Type | Specification / Capability | Quality Impact |
|---|---|---|
| Horizontal Continuous Casting Line | 10-ton capacity | Produces homogeneous copper alloy tube for heat exchanger billets with zero porosity. |
| Three-Roll Piercing Mill | Up to 60mm OD | Precision wall thickness control for heat exchanger tube wall thickness as low as 0.5mm. |
| Cold Drawing Bench | 5 draws in sequence | Achieves tight tolerances on copper heat exchanger tube length and heat exchanger pipe diameter. |
| Straightening & Cutting Line | CNC servo-controlled | Burr-free cutting for copper heat exchanger tube 3/4 inch and 1 inch to exact project lengths. |
| U-Bending Machine | CNC mandrel type | Produces u tube condenser and U tube bundle heat exchanger without kinking or ovality. |
| Eddy Current Tester | NDT (Non-Destructive Testing) | 100% inspection of C70600 tube and C71500 tube for pinholes or cracks per ASTM B111 pdf standards. |
| Hydrostatic Tester | Up to 200 bar | Validates heat exchanger tube expansion and tube rolling integrity. |
| Spectrometer | Optical emission (OES) | Confirms chemical composition of ASME SB111, EN 12451, and JIS H3300 grades on every batch. |
Our Certifications & Compliance:
ASTM B111 pdf and ASME SB111 pdf full traceability.
ISO 9001:2015 quality management system.
Third-party inspection accepted: SGS, BV, Lloyds, or TUV.
Copper heat exchanger tube life expectancy testing reports available upon request.
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FAQ
What is a seamless copper heat exchanger tube?
A seamless copper heat exchanger tube is a tube formed from a solid billet by extrusion or piercing, then cold drawn to final dimensions. It has no longitudinal welded seam, providing uniform strength and corrosion resistance throughout the tube wall.
Why is seamless required for heat exchanger boiler applications?
ASME SB111 and most boiler codes require seamless copper heat exchanger tube for pressure service because a welded seam is a potential leak path under thermal cycling and pressure. The copper heat exchanger tube vs stainless steel debate is separate – but for copper alloys in boiler service, seamless is mandatory.
How do I get a seamless copper heat exchanger tube price?
Copper heat exchanger tube price depends on alloy, OD, wall thickness, length, and quantity. C12200 is the lowest cost. C70600 tube is approximately 2x the price. C71500 tube is approximately 3x the price. Send your specification for a firm get a quote for copper heat exchanger tube response.
Do you have seamless copper heat exchanger tube for sale in 5/8 inch or 3/4 inch?
Yes. We stock copper heat exchanger tube 5/8 inch, copper heat exchanger tube 3/4 inch, and copper heat exchanger tube 1 inch in C12200 and C70600 at our regional warehouses. Copper heat exchanger tube od 19mm (3/4 inch) is our most popular size.
What is the life expectancy of a seamless copper heat exchanger tube?
Copper heat exchanger tube life expectancy for C12200 in clean water service is 15 to 20 years. For C70600 in seawater, expect 20 to 30 years. For C71500 in severe service, expect 30+ years with proper water chemistry.
How to clean seamless copper heat exchanger tubes without damage?
How to clean copper heat exchanger tube – use inhibited citric acid or sulfamic acid for scale. Never use hydrochloric acid. For how to clean copper heat exchanger tube with biological fouling, use chlorine dioxide or nylon brushes. Avoid steel brushes which scratch the tube surface.
What causes copper heat exchanger tube corrosion in seamless tubes?
Copper heat exchanger tube corrosion in seamless tubes is usually caused by:
Erosion corrosion – velocity too high (above 1.5-2.0 m/s depending on alloy)
Stress corrosion cracking – ammonia present with residual stress from bending
Galvanic corrosion – dissimilar metals in contact
Pitting – aggressive water chemistry
We provide failure analysis for copper heat exchanger tube corrosion issues on existing bundles.
Can you supply seamless u tube heat exchanger bundles?
Yes. We manufacture complete u tube heat exchanger and u tube bundle heat exchanger assemblies from seamless copper heat exchanger tube. Send your tube sheet drawing for a quote.
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