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A Double Pipe Heat Exchanger is a simple and robust type of heat exchanger designed for moderate pressure and temperature applications. It consists of one pipe placed concentrically inside another, with one fluid flowing through the inner pipe and the other through the annulus between the pipes. This design offers high thermal efficiency, ease of cleaning, and straightforward maintenance, making it especially suitable for heating, cooling, and heat recovery processes in various industries.
The Weihai Shidao Double Pipe Heat Exchanger is a reliable and cost-effective solution engineered for industrial applications requiring steady performance and low maintenance. Manufactured by Weihai Shidao Heavy Industry Co., Ltd., this exchanger combines quality fabrication, durable materials, and ASME-compliant standards to deliver consistent results. It is widely used in chemical, petrochemical, pharmaceutical, food processing, and power generation sectors, where operational simplicity and dependable heat transfer are essential.
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The Double Pipe Heat Exchanger is a simple yet highly reliable heat exchanger designed for process duties involving moderate pressures, temperatures, and clean or slightly fouling fluids. Its concentric pipe-in-pipe configuration enables effective counter-current heat transfer, providing high thermal efficiency in a compact and economical design. Due to its straightforward construction, it offers easy maintenance, low cost of fabrication, and dependable performance across diverse industries. The modular design also allows multiple units to be connected in series or parallel, ensuring operational flexibility and scalability.
| Industry | Application Scenarios | Key Benefits of Double Pipe Design |
|---|---|---|
| Oil & Gas | – Cooling of lube oil and hydraulic fluids – Natural gas preheating & cooling – Small-scale condensate recovery – Utility service exchangers | – Simple and robust construction – Reliable for continuous duty – Cost-effective for auxiliary services |
| Petrochemical | – Cooling of process streams with moderate flow – Preheating of feedstock gases/liquids – Utility water and glycol exchangers – Small batch operations | – Compact design with modular arrangement – Easy to clean and maintain – Low cost compared to large exchangers |
| Refining | – Side stream cooling in distillation units – Fuel oil preheating – Waste oil recovery heating – Cooling of auxiliary fluids | – High efficiency in counter-current flow – Flexible in parallel/series arrangements – Durable and long service life |
| Fertilizer & Chemical | – Cooling of ammonia solution streams – Heat recovery in small-scale synthesis units – Process water heating/cooling – Solvent recovery systems | – Economical heat transfer solution – Reliable under moderate conditions – Straightforward inspection and cleaning |
| Power Generation | – Lube oil cooling for turbines and generators – Boiler feedwater preheating (auxiliary circuits) – Cooling of condensate return lines – Auxiliary heat recovery services | – Reliable for utility operations – Compact and modular for limited spaces – Easy maintenance with minimal downtime |
As a leading pressure vessel and heat exchanger manufacturer, Weihai Shidao Heavy Industry Co., Ltd. specializes in the design and fabrication of Double Pipe Heat Exchangers for a wide range of industrial applications. With ASME, PED, and ISO certifications, and decades of experience serving global oil & gas, petrochemical, chemical, refining, fertilizer, and power industries, Weihai Shidao provides cost-effective, efficient, and durable solutions tailored to customer-specific process needs. Each unit is manufactured with advanced engineering design, high-quality materials, and rigorous testing, ensuring long service life and dependable performance. Whether applied in refineries, chemical plants, or power stations worldwide, Weihai Shidao’s Double Pipe Heat Exchangers deliver consistent efficiency, operational simplicity, and proven reliability.
A Double Pipe Heat Exchanger is one of the simplest types of heat exchangers, consisting of one pipe inside another (a tube-in-tube arrangement). One fluid flows through the inner pipe, while the other fluid flows through the annulus between the two pipes, usually in counter-current direction. This configuration maximizes temperature difference between fluids, delivering efficient heat transfer in a compact, economical design.
The main benefits include:
Simple and robust construction, with minimal risk of leakage.
Compact footprint, easy to install and expand in modular form.
High efficiency in counter-current heat transfer.
Cost-effective fabrication and operation compared to larger exchangers.
Easy inspection and maintenance, since the design is straightforward.
These features make it particularly attractive for small- to medium-capacity process applications.
Double Pipe Heat Exchangers are widely applied across oil & gas, petrochemical, refining, chemical, fertilizer, food processing, and power generation industries. They are typically used in duties such as lube oil cooling, feedwater preheating, solvent recovery, process stream heating/cooling, and other utility services where moderate pressure and temperature conditions exist.
These exchangers are best suited for moderate pressures and temperatures, though with the right materials and design, they can be customized for more demanding services. Typically, they operate under:
Pressures up to 100 bar (depending on design and material selection).
Temperatures up to 400°C or more with special alloys.
Material options (e.g., carbon steel, stainless steel, copper alloys) allow them to handle a variety of process fluids, including corrosive or fouling media.
Compared to shell-and-tube exchangers, Double Pipe units are simpler, smaller, and more cost-effective, making them ideal for lower flow rates or modular systems. Compared to plate heat exchangers, they handle higher pressures more reliably and are easier to clean mechanically. However, for very large-scale duties, multi-pass shell-and-tube exchangers may be more economical. In short, Double Pipe Heat Exchangers fill the gap for small to medium capacity, reliable, and flexible heat transfer solutions.
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