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Square Liquid Cooling Pipe

Square Liquid Cooling Pipe is made of high-strength aluminum alloy or 316L stainless steel and is specifically designed for efficient heat management. Its square cross-sectional structure optimizes the fluid dynamics performance. Compared to traditional circular pipes, it can increase the heat dissipation efficiency by approximately 15% under the same cross-sectional area. The product is ensured to have an inner wall smoothness of ≤ 0.8 μm through precise processing technology, significantly reducing fluid resistance and suitable for liquid cooling systems in scenarios such as high-density computing, new energy vehicle battery packs, and industrial equipment.

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Product Introduction

Product Features

Efficient Heat Dissipation Performance

The square structure increases the heat dissipation area, combined with the turbulence column design (optional 2mm square staggered arrangement), the convective heat transfer coefficient reaches up to 4223 W/(m²·K), which is 125.83% higher than the cavity structure.

It supports operation within a wide temperature range of -40°C to 150°C and is compatible with water-based, ethylene glycol, and dielectric cooling fluids.

Lightweight and Corrosion Resistance

The aluminum alloy model weighs 40% less than the traditional copper tube. The stainless steel model achieves food-grade corrosion resistance through 316L material, suitable for humid or chemical environments.

The outer layer uses PPS engineering plastic or ceramic coating, with an anti-aging performance improvement of 3 times, and a lifespan exceeding 10 years.

Low Flow Resistance and Silent Design

The patented rubberless shunt design reduces pressure drop by 20%, combined with a ceramic shaft core water pump, the operating noise is ≤ 25dB(A).

It has a built-in flow indicator to monitor the cooling fluid circulation status in real time, avoiding the risk of system overheating.

Safety Redundancy Design

The double-layer sealing structure (Viton fluororubber + mechanical snap) passes a 10bar pressure test, with a leakage rate lower than 0.001%/year.

The modular interface supports quick insertion and removal, reducing maintenance time by 60%.

Application

Data Centers and HPC

Direct chip cooling or immersion liquid cooling systems to solve the high-power consumption heat dissipation problems of AI servers and supercomputing centers.

The prefabricated pipeline system is compatible with plug-and-play, improving deployment efficiency by 50%.

Electric Vehicles

Side cooling solution for battery packs: Snake-shaped tubes are in close contact with the surface of cylindrical battery cells, with a temperature difference control of ≤ 2°C, extending battery lifespan.

Liquid cooling circuits for motor controllers and charging stations, supporting 800V high-voltage platform heat dissipation requirements.

Industrial Equipment

For high-power density equipment such as laser cutting machines and frequency converters, forced liquid cooling ensures stable operation of the equipment at 45°C environmental temperature.

Liquid cooling pipelines for energy storage systems, compatible with lithium iron phosphate and lithium-ion battery packs.

DN40 Stainless Steel Tube for Refrigeration Systems DN25 Stainless Steel Piping for Thermal Management Systems

Specifications

Parameter	Specification
Product Name	Square Liquid Cooling Pipe
Shape	Square / Rectangular Tube
Material Options	Stainless Steel 304 / 316 / 316L, Aluminum 6061 / 3003, Copper
Surface Finish	Polishing, Brushed, Sandblasting, Passivation, Electrolytic Polishing
Outer Size Range	10×10 mm to 50×30 mm
Common Sizes	10×10 mm, 15×15 mm, 20×20 mm, 25×25 mm, 30×20 mm, 40×20 mm, 50×30 mm
Wall Thickness	1.0 mm – 3.0 mm
Length	300 mm / 600 mm / 1000 mm / Custom Length
Internal Structure	Single Channel / Multi-Channel / Finned Structure
Connection Type	Threaded, Quick Connector, Welded, Flange
Thread Standards	G1/4, NPT, BSPT, SAE
Working Medium	Water, Glycol Mixture, Coolant Fluid, Dielectric Fluid
Working Pressure	0.6 MPa – 2.5 MPa (Custom Available)
Test Methods	Air Tightness Test, Water Pressure Test, Helium Leak Test
Operating Temperature	-40°C to +120°C
Tolerance	±0.1 mm to ±0.5 mm
Manufacturing Process	Extrusion, Welding, CNC Machining, Bending
Custom Service	OEM / ODM / Drawing Customization
Application	AI Servers, Data Centers, CDU Systems, Battery Packs, Energy Storage, Industrial Cooling

Custom Services

1. Material and Size Customization

(1) Materials available: 6063-T5 aluminum alloy, 316L stainless steel, titanium alloy (resistant to seawater corrosion), and various other materials.

(2) Section size range: 20mm×20mm to 200mm×200mm, with a wall thickness of 1.5mm - 5mm.

2. Interfaces and Connection Methods

(1) Supports standard interfaces such as G1/4 and NPT1/2, or custom flanges and quick connectors as per customer drawings.

(2) Provides explosion-proof connection solutions suitable for hazardous environments such as mining and offshore platforms.

3. Surface Treatment and Marking

(1) Surface treatments such as anodizing (aluminum alloy), electrolytic polishing (stainless steel), enhancing corrosion resistance.

(2) Laser engraving of customer logos, models, and QR codes for full lifecycle traceability.

4. System Integration Support

Comprehensive liquid cooling solutions are provided, including CDU (cooling capacity distribution unit), flow sensors, and control software.

FAQ

1. What is a square liquid cooling pipe?

This is a tube with a square or rectangular cross-section designed to circulate coolant for heat dissipation in liquid cooling systems. It is widely used in AI servers, data centers, battery packs, and industrial cooling equipment.

2. Why choose a square cooling pipe instead of a round pipe?

Square cooling pipes provide better space utilization, easier installation along frames or cabinet edges, and larger flat contact surfaces for integration with cold plates or manifolds. They are ideal for compact, high-density cooling systems.

3. What materials are available for these square pipes?

Common material options include Stainless Steel 304, Stainless Steel 316L, Aluminum 6061, Aluminum 3003, and Copper. Stainless steel is the most popular choice for corrosion resistance and long service life.

4. Which material is best for data center liquid cooling systems?

316L stainless steel is commonly recommended for data center cooling systems because it offers excellent corrosion resistance, strength, and compatibility with water-glycol coolants.

5. What coolant can be used inside the pipe?

Square liquid cooling pipes can be used with water, glycol mixtures, dielectric fluids, refrigerants, or custom industrial coolants depending on the application requirements.

6. What connection types are available?

Available connection methods include threaded ends (NPT, BSPT, G threads), quick connectors, welded joints, and flange connections. The best option depends on system pressure and maintenance needs.

7. How do you prevent leakage in liquid cooling pipes?

Leak prevention requires precision welding, reliable fittings, pressure testing, air tightness testing, and helium leak detection before shipment. High-quality sealing is critical in electronics cooling systems.

8. What pressure can square liquid cooling pipes handle?

Typical industrial liquid cooling pipes can handle 10–30 bar depending on material, wall thickness, and design. Custom high-pressure versions are also available.

9. Can square cooling pipes be customized?

Yes. Most manufacturers offer OEM and ODM services including custom dimensions, wall thickness, ports, bending, CNC machining, welding, and surface finishes based on drawings or samples.

10. What industries use square pipes?

They are widely used in AI server racks, HPC systems, data centers, battery energy storage systems, EV battery packs, power electronics, laser machines, and industrial automation cooling systems.

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