Products

Our core products are copper heat pipes — sintered, grooved, and composite types — made end-to-end in our Shenzhen factory. Sizes and forming are built to your drawing; our standard tolerances are listed below.

Copper heat pipes after forming on the production line — Heat pipes after forming — inspected on the line

Heat pipes in process trays after charging and sealing — Charged and sealed pipes, ready for bending

Heat Pipe Types

Three wick constructions cover different performance and cost requirements. Choose by application, or send your drawing and we will confirm feasibility before you commit.

Type	Available Length Range	Typical Use
Sintered wick	D4 / D5: 60–350 mm · D6 / D7: 60–410 mm · D8: 60–580 mm	General electronics cooling, orientation-independent operation
Grooved wick	D6 / D8: 60–580 mm	Cost-sensitive designs with moderate heat loads
Composite wick	D6: 60–410 mm · D8: 60–580 mm	High heat flux with flexible mounting orientation

Standard Specifications

Outer diameters from D3 to D12 mm; total length 50–600 mm depending on diameter and wick type. Drawings outside these ranges can be evaluated — ask first.

Specification	Value
Available outer diameters	D3, D4, D5, D6, D7, D8, D10, D12 mm (others on request)
Tube material	Oxygen-free copper; wall thickness tolerance 0.03 mm
Surface treatment	Nickel plating, passivation
Min. flattened thickness	D4 / D5: 2.0 mm · D6: 2.5 mm · D8: 3.0 mm

Minimum bend radius depends on diameter and wall thickness:

Diameter	Wall 0.3 mm	Wall 0.4 mm	Wall 0.5 mm
D4 / D5	R ≥ 8 mm	—	—
D6	R ≥ 11 mm	R ≥ 10 mm	R ≥ 9 mm
D7	R ≥ 15 mm	—	—
D8	R ≥ 16 mm	R ≥ 16 mm	R ≥ 12 mm

Design Tolerances

Standard production tolerances. Tighter requirements can be discussed at drawing stage.

Dimension	Tolerance
Outer diameter	±0.05 mm (within 0.10 mm range)
Flattened thickness — sintered	±0.05 mm
Flattened width — sintered	±0.15 mm
Flattened thickness — grooved	±0.05 mm
Flattened width — grooved	±0.20 mm
Straightness — reference end	±0.5 mm
Straightness — opposite end	±1.0 mm
Angle tolerance	±0.50 mm
Step (offset) tolerance	±0.20 mm

How It Works

Copper shell, wick structure, deionized water working fluid. By two-phase heat transfer (evaporation and condensation), a heat pipe’s effective thermal conductivity reaches 100–1000× that of solid copper — with no noise, no moving parts, and no external power.

How it works — heat in at the evaporator, capillary return through the wick, heat out at the condenser.

Ordering Information

Item	Details
Minimum order quantity	1,000 pcs for production orders
Sampling	Sample lead time 7–21 days; tooling cost depends on product shape
Production lead time	3 weeks standard · 2 weeks expedited
Quote validity	7 days; copper price adjustments agreed at ±10%

Custom Assemblies

Heat-pipe assemblies with fin stacks or embedded bases for 1U/2U servers, GPU cooler OEM parts, thermoelectric refrigeration, solar thermal collectors, and communications equipment.

Request a Quote

Send drawings via our contact page. For the fastest quote, include: OD, length, Qmax target and orientation, bending/flattening requirements, and estimated annual volume.