Custom Heat Pipe Design & Manufacturers

Custom Heat Pipes for High Performance Electronics 

When heat must be transported away from the source to a remote heat sink, cold plate, or chassis, custom heat pipes move thermal energy with far greater efficiency than solid metal conduction alone. 

Celsia designs and manufactures custom heat pipes and custom heat pipe heat sinks for defense, aerospace, telecom, industrial, medical, and advanced computing applications. U.S.-based engineering and Taiwan manufacturing support low- to mid-volume programs from initial design and prototyping through qualification and production. Unlike heat pipe manufacturers that offer standard catalog parts, Celsia engineers every heat pipe around the thermal, mechanical, and environmental requirements of the application. 

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When Is a Custom Heat Pipe the Right Solution? 

Custom heat pipes are used when heat transport becomes the limiting factor in system performance. As electronics become more compact and power densities increase, moving heat efficiently to an available cooling surface often becomes more difficult than rejecting the heat itself. 

A custom heat pipe may be the right solution if your application involves: 

• High power processors, ASICs, GPUs, FPGAs, or RF amplifiers  

• Long transport distances between the heat source and heat sink  

• Remote or offset heat sink placement  

• Tight mechanical envelopes  

• Weight and space constrained systems  

• Passive cooling requirements with no fans or pumps  

• Harsh operating environments  

• Defense, aerospace, telecom, medical, or industrial qualification requirements  

Once heat pipes have been identified as the appropriate thermal architecture, a custom design allows diameter, wick structure, working fluid, flattening, routing, and attachment features to be optimized around the application rather than forcing the design around a standard component. 

Engineering Decisions That Determine Heat Pipe Performance 

A heat pipe’s performance is determined by more than its diameter or maximum power rating. Diameters, flattening, routing, and wick selection all influence how effectively heat is transported through the system. Optimizing these parameters early helps maximize thermal performance while improving manufacturability and long-term reliability. 

Diameter & Heat Transport Capacity 

Selecting the proper diameter balances thermal performance with available space and mechanical constraints. 

 Flattening & Vapor Space Preservation 

Flattening improves thermal contact but reduces internal vapor space. Successful designs balance both. 

 Bend Radius & Routing 

Heat pipes are often routed around components. Proper routing minimizes performance loss while simplifying manufacturing. 

Design Optimization Starts Before Manufacturing 

Every custom heat pipe program begins by evaluating the complete thermal path—not simply selecting a standard heat pipe. Diameter, flattening, routing, wick structure, and integration are optimized together to improve thermal performance, manufacturability, and long-term production reliability. 

Custom Heat Pipe Configurations We Manufacture 

The optimal heat pipe configuration depends on heat load, transport distance, orientation, available space, integration requirements, and manufacturing constraints. 

Celsia manufactures a wide range of custom heat pipe configurations so the design is selected around the application rather than limited by standard catalog products. 

Straight Heat Pipes 

Simple high-performance heat transport for direct integration into heat sinks, cold plates, or chassis cooling systems. 

Flattened Heat Pipes 

Round heat pipes flattened to improve contact area while maintaining vapor transport capability for space-constrained assemblies. 

Bent Heat Pipes 

Precision bending allows heat to be routed around mechanical obstacles while maintaining thermal performance and manufacturability. 

Embedded Heat Pipe Assemblies 

Heat pipes integrated into aluminum or copper heat sinks, cold plates, spreaders, and structural assemblies to reduce overall thermal resistance. 

Typical Applications 

• Defense mission computers  

• VPX and OpenVPX systems  

• GaN RF amplifiers  

• AI accelerators  

• Industrial power electronics  

• Telecom radios and active antenna systems  

• Medical imaging equipment  

• Laser systems  

• Satellite electronics  

• Battery management systems  

Program Flow 

Typical timelines vary based on design complexity, tooling requirements, testing, and customer qualification needs. 

Every program begins with an engineering review of the application’s heat load, transport distance, thermal budget, operating environment, mechanical constraints, and qualification requirements. Thermal modeling is used to optimize heat pipe diameter, wick structure, routing, flattening, and condenser integration before production tooling begins. 

As a heat pipe supplier, Celsia supports low- to mid-volume programs from prototype and qualification builds through ongoing production. Engineering, manufacturing, and quality teams work together throughout development to maintain design intent, improve manufacturability, and reduce program risk as production scales. 

Customers benefit from: 

• Continuity from prototype through production  

• Heat pipes optimized for manufacturability before tooling  

• First article inspection support  

• Traceable manufacturing processes  

• Long-term production support  

• Documentation for customer qualification  

Whether building dozens of assemblies for a defense platform or scaling to commercial production, Celsia supports the program throughout its lifecycle. 

Quality & Qualification 

The programs we support require manufacturing consistency, documentation, and validation—not simply thermal performance. 

Production is performed in Celsia’s Taiwan facility under ISO 9001-certified quality systems with documented manufacturing controls and traceable production processes. 

Quality capabilities include: 

• ISO 9001 Certified  

• ITAR Registered  

• RoHS & REACH Compliant  

• 100% Helium Leak Testing  

• 100% Thermal Performance Validation  

• Dimensional Verification  

• First Article Inspection  

• Burn-In Testing  

• Environmental Validation Support  

• Traceable Material and Process Documentation  

Every heat pipe is inspected and validated before shipment to help ensure consistent thermal performance and long-term reliability. 

Let’s Review Your Thermal Path 

An initial engineering review can begin with: 

• Heat load  

• Heat transport distance  

• Thermal budget or target component temperature  

• Available X/Y/Z envelope  

• Heat sink, cold plate, or chassis interface  

Additional information such as orientation, flattening requirements, bend radius, operating temperature, reliability objectives, and qualification requirements can be incorporated as the design develops. 

If these inputs are not fully defined, Celsia can help evaluate thermal architectures and identify the information needed before hardware is built. 

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