Seamless Copper Heat Exchanger Tube

Gnee Steel (Tianjin) 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.

Welded copper tube:

Starts as a flat copper strip, formed into a cylinder, and welded along the seam

The weld zone has different grain structure and corrosion resistance than the base metal

Potential for weld defects (lack of fusion, porosity, inclusions)

Not permitted by ASME Boiler and Pressure Vessel Code for many heat exchanger boiler applications

Lower copper heat exchanger tube life expectancy in corrosive service

Seamless copper heat exchanger tube:

Extruded or pierced from a solid cast billet, then cold drawn to final dimensions

Uniform grain structure and chemistry throughout the tube wall

No weld seam to fail under thermal cycling or pressure

Required by code for shell and tube heat exchanger in high-pressure or high-temperature service

Longer copper heat exchanger tube life expectancy in corrosive environments

If you are searching for what is copper heat exchanger tube that meets ASME SB111 requirements for a heat exchanger condenser or heat exchanger hvac system, the answer is seamless.

We produce seamless copper heat exchanger tube to the following international specifications. Each standard has specific requirements for chemistry, mechanical properties, dimensions, and testing.

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.

Our seamless copper heat exchanger tube is available in all ASTM B111 copper alloys. The table below shows the most common selections.

For a detailed copper heat exchanger tube vs cupronickel comparison, C70600 and C71500 offer significantly better seawater resistance than C12200 or C44300, but at higher copper heat exchanger tube price.

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.

We stock and manufacture seamless copper heat exchanger tube in a wide range of dimensions. Below are our standard offerings.

Outer Diameter (OD)

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.

Send Your Size Requirements

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.

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.

Poor packaging destroys even the best copper heat exchanger tube. As a professional copper heat exchanger tube factory serving copper heat exchanger tube USA, Europe, UAE, Saudi Arabia, and India, we follow military-grade export packaging standards to ensure zero damage during sea or air freight.

Our Standard Packaging Process:

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 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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