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Description 40 Manufacturers
Zhengzhou City Huitong Pipe Fittings Co., Ltd.
U.S. Metals
Tubos India
Tubewell Steel & Engg.Co
TITAN Metal Fabricators
Steel Emporium
STALESIA SP. Z O.O.
Special Piping Materials
SIBATA SCIENTIFIC TECHNOLOGY LTD
Shanghai Metal Corporation
Shalco Industries Pvt. Ltd
Raaj Sagar Steels

40 Duplex Pipe Manufacturers in 2024

This section provides an overview for duplex pipe as well as their applications and principles. Also, please take a look at the list of 40 duplex pipe manufacturers and their company rankings. Here are the top-ranked duplex pipe companies as of November, 2024: 1.Corrosion Resistant Alloys, LCC, 2.P.A., Inc., 3.PCC ROLLMET,INC..

Table of Contents

What Is Duplex Pipe?

Duplex Pipe

A duplex pipe is a type of tubing that consists of concentric inner and outer tubes of different diameters. This dual-tube design safeguards against flow loss from inner tube damage and facilitates the heat exchange between liquids and gases flowing within the inner tube. Certain designs allow for absorbing external air fluctuations by securing the inner and outer tubes in distinct manners.

Applications of Duplex Pipe

1. Environmental Preservation Applications

The outer tube is designed to protect the inner tube from damage and fluid loss, thereby preventing environmental contamination.

2. Heat Exchanger Applications

Duplex pipes are commonly used in heat exchangers, facilitating heat transfer between the gas or liquid in the inner tube and the fluid in the outer tube. Their design minimizes fluid clogging and allows for a compact configuration by coiling the tubes. Duplex pipes support both parallel and counter flow, with enhanced performance achievable by adding fins to the inner or outer surfaces of the tubes. In refrigeration cycle heat exchangers, fins are often added to the waterside to improve heat transfer efficiency significantly.

3. Double-Piping Applications

An everyday use is in bathtub hot water systems, where hot water circulates between the heater and the tub through the gap between the pipes. This design is also employed in the air supply and exhaust for FF heaters, using the outer pipe for intake and the inner pipe for exhaust, demonstrating its utility in wall penetrations and HVAC ducts.

4. Double-Wall Construction Applications

The duplex pipe's double-wall configuration, with no space between the tightly sealed inner and outer tubes, is ideal for environments with differing corrosion conditions between the tubes. This construction is utilized in thermal power condensers, as well as heat exchangers in refining and petrochemical plants, combining materials like carbon steel, brass, and stainless steel for cost efficiency and corrosion resistance.

5. Medical Applications

Duplex pipes are utilized in medical tracheostomies for both inhalation and exhalation processes.

6. Civil Engineering Applications

These pipes are employed to transport two different chemicals that combine at the endpoint to condition-specific soil areas.

Principle of Duplex Pipe

The features and capabilities of duplex pipes vary with the material combination of the inner and outer tubes. Utilizing materials with high heat conductivity for both tubes enables their use as efficient heat exchangers. Transparent outer tubes allow quick detection of inner tube issues, while strong, clear materials can prevent cracks and leaks. Such combinations are particularly valuable in applications requiring high reliability, like automotive piping. Transparent materials also facilitate constant monitoring of the water level within the pipes, and nozzle-shaped ends enable applications such as sprayers.

Other Information on Duplex Pipe

1. Hazardous Substances Designation

Substances such as cadmium, cyanide compounds, organic phosphorus compounds like parathion, lead, hexavalent chromium compounds, arsenic, mercury and its compounds, polychlorinated biphenyls, and trichloroethylene fall under the category of hazardous substances.

2. Use of Duplex Pipe

Duplex pipes offer a straightforward and cost-effective solution for complying with these regulations. Their use in hazardous substance piping allows for visual inspection and immediate detection of leaks, especially when the outer tube is transparent. This applies to the pipe's main body, as well as fittings, flanges, valves, and pumps through which hazardous substances flow.

List of 40 Duplex Pipe Manufacturers

*Including some distributors, etc.

Sort by Features

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  • Company Size: largest first
  • Year Founded: oldest first
  • Year Founded: earliest first

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  • United States of America
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  • Japan
  • Poland
  • United Arab Emirates
  • United Kingdom
    • BRISMET
      • United States of America Address: 390 Bristol Metals Rd. Bristol, Tennessee, United States of America

      Manufacturer Overview

      BRISMET, established in 1941 in the US, is a manufacturer of stainless, duplex and titanium welded steel pipe. The company located in Bristol, produces a diverse line of stainless steel, high nickel alloy, super duplex, titanium and moly grades of welded pipe for consumption throughout the world. It produces welded pipe sizes from ½” to 144” in diameter and operates 190,000 square feet of manufacturing facilities. Synalloy Metals is its brand name which references three operating business units. The name “Synalloy” references its parent (Synalloy Corporation, SYNL) and “Metals” refers to its three units that produce tubular welded steel products and services.

    • TITAN Metal Fabricators
      • United States of America Address: 352 Balboa Circle, Camarillo, California, United States of America

      Manufacturer Overview

      TITAN Metal Fabricators is a designer, manufacturer, and supplier of corrosion-resistant process equipment for industries facing corrosion challenges in Camarillo, USA. Their expertise lies in reactive metals and corrosion resistant alloys such as Titanium, Tantalum, Zirconium, and more. TITAN offers a wide range of process equipment, including Shell and Tube Heat Exchangers, Columns and Towers, Condensers, Reactors, and Pressure Vessels. The company serves diverse industries like Oil and Gas, Pharmaceutical, Steel, and Chemical. Their subsidiary in Wuxi, China, also specializes in Reactive Metal Process Industry Equipment.

      • United States of America Address: 6626 Gulf Fwy, Houston, Texas, United States of America

      Distributor Overview

      P.A., Inc., established in 1992 and based in Houston, Texas, USA, is a distributor and supplier of nickel and specialty stainless steel piping products. The company's product range includes Alloy 600, Alloy 625, Alloy 020, Alloy 800H/800HT, and Duplex 2205 stainless steel. These products find applications in environments demanding resistance to corrosion and high temperatures. They serve industries such as Chemical, Energy, Manufacturing, and Infrastructure. The company also offers services like material traceability, alloy verification, chemical content confirmation, and ultrasonic wall thickness testing.

    • Steel Emporium
      • India Address: 102, Durga Devi Street, OPP. 4th Kumbharwada, Mumbai, Maharashtra, India

      Manufacturer Overview

      Steel Emporium, founded in 1996 with headquarters in India, is a manufacturer and supplier of non-ferrous alloys in various forms. The company's products include aluminum pipe, aluminum seamless pipe, oxygen-free copper lugs, cadmium copper tubes, and stainless steel rods. Steel Emporium's alloy products are used by various industries and markets, including dairy and food processing plants, OEM manufacturers, vehicle panels in automotive manufacturing plants, and alloy processing plants.   The company's clients include Salem Tube, Fine Tubes, Kobelco, Nippon Steel & Sumitomo Metal, and Outokumpu.

    • Multi Metals
      • India Address: 57, C.P. Tank Rd., Shop No. 1,Old Sonawala Bldg’,Mumbai, Maharashtra, India

      Manufacturer Overview

      Multi Metals was founded in 1962 and headquartered in Rajasthan, India, as a seamless extruded copper alloy product manufacturer. The company has significantly added to the expansion and development of the oil and energy sector by providing quality piping materials to EPC Contractors and Promoting Companies. The company aims to establish itself as a preferred manufacturer of Industrial Piping goods by providing technically proficient solutions and fostering mutually beneficial client relationships.

    • Metline Industries
      • India Address: 83 AB, Old Hanuman Lane, 3rd Floor, Office No. 16, Mumbai, Maharashtra, India

      Manufacturer Overview

      Metline Industries, founded in Maharashtra, India, in 2014 is a manufacturer of Steel Pipes, Fittings, and Flanges. The company's product portfolio includes Seamless and welded steel pipes, Steel pipe fittings such as elbows, tees,and reducers and Steel flanges. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building. The company provides services such as Product Selection Guidance, Engineering Support, New Product Design and Development and Custom Manufacturing.

    • Ganpat Industrial Corporation
      • India Address: Sanghvi Galaxy, Shop No.2, Khetwadi 10th Lane, Mumbai, Maharashtra, India

      Manufacturer Overview

      Ganpat Industrial Corporation, established in 1972 and based in Mumbai, India, is a manufacturer, supplier, and exporter of pipes, tubes, and fittings. Specializing in stainless steel, carbon steel, and alloy steel products, the company serves the construction, oil and gas, petrochemical, pharmaceutical, and automotive industries. Its extensive product range includes alloy steel and carbon steel in pipe, fittings, flanges, fasteners, and round bars. Ganpat Industrial Corporation is ISO 9001:2015 certified, ensuring adherence to industrial quality standards.

    • Metline
      • India Address: Nowroji Hill Road No. 11/11A BIT Chawl No.,7, Godown No.1, Near Sandhurst Road Railway Station, Mumbai, Maharashtra, India

      Manufacturer Overview

      Metline, established in 2006 and headquartered in Mumbai, India, is a manufacturer and exporter of stainless steel, alloy steel pipe fittings, and industrial flanges. The company's products include seamless and welded buttweld fittings, including elbows, reducers, and end caps. These fittings are used to construct and maintain pipelines in nuclear power, shipbuilding, and oil refinery industries. Its large-diameter fabricated pipes, double-flanged pipes, and piggable bends are used in natural gas pipelines and power plants. The company also offers aluminum pipe fittings and customized solutions in stainless steel, nickel alloys, and alloy steel.

    • Shanghai Metal Corporation
      • China Address: 20th Floor Yuan Mansion,738 Dongfang Road, Shanghai, China

      Manufacturer Overview

      Shanghai Metal Corporation, established in 1980 as a state-owned Shanghai Metal Materials Company headquartered in Shanghai, China, is a manufacturer and supplier specializing in metal materials and products. The company's metal offerings include aluminum, copper, stainless steel, galvanized steel, and steel products. It also provides metal machines for forming, cutting, bending, and processing. Additionally, the company offers various containers, gas cylinders, fire extinguishers, mechanical products, and electrical systems. These products find applications in various industries, such as automobile, construction and decoration, electrical and transformer components, machinery, and packaging. Other applications include oil, gas, and water pipelines, as well as boilers and tanks.

    • Aesteiron Steels LLP,
      • India Address: 9/A, 9th Floor, Mehta Mehal, 15th Mathew Road, Opera House, Charni Road, Mumbai, Maharashtra, India

      Manufacturer Overview

      Aesteiron Steels LLP (ASL) is an Indian manufacturer and supplier of seamless tubing and welded steel pipes that was established in Mumbai in 2007. The company primarily produces various steel pipes in various grades, including carbon, alloy, and stainless steel models, as well as aluminum and copper pipes with higher conductivity. They also offer custom fabrication of alloy pipes using different elements such as chromium or molybdenum, or with specifications for higher oxidation or corrosion resistance. ASL chiefly serves clients in the power generation, petrochemical processing, water treatment, construction, and infrastructure sectors.

    • Oshwin Overseas
      • India Address: 4/27, 25C Sonarika Apartment, Chandawadi, Nanubhai Desai Road, C P Tank, Maharashtra, India

      Manufacturer Overview

      Oshwin Overseas, established in 1999, is a manufacturer and supplier based in Mumbai, India, specializing in high nickel alloy and stainless steel products. The company produces stainless steel seamless pipes and tubes that increase durability due to the absence of weak points, reduce the risk of corrosion, and allow more efficient flows due to smoother internal surfaces. Other products include instrument fittings, instrumentation valves, buttweld fittings, and flanges. These products are utilized in diverse industries such as medical, structural engineering, oil and gas, marine, and aerospace. Oshwin Overseas holds ISO 45001:2018 and ISO 14001:2015 certifications.

    • Raaj Sagar Steels

      Manufacturer Overview

      Raaj Sagar Steels is a manufacturer of nickel alloys and stainless steel products. The company was founded in 1978 and is headquartered in Mumbai, India. Raaj Sagar Steels is primarily involved in the design, development, and manufacture of nickel alloys, including Inconel, Monel, and Hastelloy. The company also offers a wide range of stainless steel products, including bars, plates, and tubes. Raaj Sagar Steels' products are used by a wide range of customers, including the chemical, oil and gas, and power industries.

    • U.S. Metals

      Manufacturer Overview

      U.S Metals Inc., established in 1980 and headquartered in Houston, Texas, is a supplier of piping components, including valves, fittings, flanges, and pipes of many different grades. Some of the industries it serves include power plants, petrochemical plants, and oil refineries, and it tailors each solution to the specific sector it serves. It also provides extra services that include color coding, mechanical saw cutting, specialty machining, export packaging, and export documentation. The company is ISO 9001 certified, and every shipment that leaves its facilities is accompanied by a quality documentation package, including a manufacturer’s test report.

    • Zhengzhou City Huitong Pipe Fittings Co., Ltd.

      Manufacturer Overview

      Zhengzhou Huitong Pipe Fittings Co., Ltd., founded in 1978 and based in Zhengzhou, China, is a manufacturer, supplier, and exporter of metal products. The company has a wide range of products, including bw pipe fittings, welding wire electrodes, fasteners, flanges, and round bars, and it uses several materials, which include stainless steel, special alloys, duplex stainless steel, cobalt, and titanium. Its products have many specifications and are used in thermal processing, environmental protection, power generation, natural gas, and paper-making industries.

    • Kaysuns Industry Ltd.
      • China Address: RM901 No.22 Tangjiaqiao Road Wenzhou, China

      Company Overview

      Kaysuns Industry Ltd, established in 2008 and based in Wenzhou, China, is a manufacturer and supplier of stainless steel and duplex steel pipes and fittings. The company's product range includes stainless steel seamless pipe, stainless steel welded pipe, stainless steel tubing, stainless steel butt-welding fittings, and stainless steel flanges. These products find applications in the flow of fluids, offering connection and enhancing the function of devices. The company primarily serves industries such as fabricated metal products, fluid management, construction, and infrastructure. Its services include customized fabrication, pre-fabrication of flanged pipe, and flanged elbow production.

    • Tubewell Steel & Engg.Co
      • India Address: Office No 11, Ground Floor Radha Krishna Mahajanwadi, 2nd Dubash Lane, V.P Road, Mumbai, Maharashtra, India

      Company Overview

      Tubewell, established in 1989 and based in Mumbai, India, is an ISO 9001:2008 certified manufacturer and supplier of carbon steel pipes. The company's product lineup includes alloy steel pipes, ASTM A106 Grade B pipes, ASTM A53 Grade B pipes, chrome moly pipes, and stainless steel pipes. These products are essential in the oil and gas sectors and other related industries. The company also serves the oil, gas, public sector, and government sector industries. The company's services include cutting, threading, grooving, and beveling pipes.

    • Tubos India
      • India Address: 107, Kika Street, 4th Floor, Umrao Bhavan, Gulalwadi, Mumbai, India

      Company Overview

      Tubos India was founded in 2000 and is headquartered in Maharashtra, India, as an essential iron and steel manufacturer. The company provides various products and adheres to rigorous quality requirements. The company engages in the manufacturing of seam tubes and cold-formed sections, as well as the processes of steel leveling and cut-to-length. Additionally, the company is involved in the trade of long and flat steel commodities. This initiative aims to adhere to the stipulations outlined in the quality management system, which encompasses the involvement of customers, suppliers, and other significant stakeholders.

    • JIAXING MT STAINLESS STEEL CO.,LTD.
      • China Address: No.501, Changsheng South Road, Occident Biotechnology Industry Park, Jiaxing, Zhejiang, China

      Company Overview

      JIAXING MT STAINLESS STEEL CO., LTD., established in 2006 in Zhejiang, China, is a manufacturer and supplier of industrial piping systems such as seamless pipes, seamless tubes, pipe fittings, steel wire, and control lines. Its product catalog includes stainless steel seamless pipes, duplex steel welded pipes, bright annealed polished tubes, casting pipe fittings, and welded neck flanges. The company also offers oilfield services such as bare tubing, optical cable fixing, and encapsulated tubing. It has been awarded TUV ISO 9001 and Euro Annex certificates.

    • SIBATA SCIENTIFIC TECHNOLOGY LTD
      • Japan Address: 1-1-62, Nakane, Soka, Saitama, Japan

      Company Overview

      Sibata Scientific Technology Ltd, founded in 1921 at Saitama, Japan is a manufacturer of environmental measurement and occupational health measurement equipment. The company with global clientele produces various scientific measurement and analysis equipment that can range from lab glassware to synthetic reactors. The products line comprise of general lab equipment, extractor, synthetic reactor, Rotary Evaporator and Glass tube oven. These products are used in applications such as occupational safety, food hygiene, water hygiene, hospital and chemical plants as well. The products are ideal for testing quality, measuring dust, precise heating & cooling, personal exposure measurements and many more with more reliability.

      • India Address: 106, 1st Floor, Shreepati Castle, C Wing, Kethwadi Main Road, Girgaon, Mumbai, Maharashtra, India

      Company Overview

      Hitech Metal And Tubes, founded in 1993 and based in Mumbai, India, is a manufacturer, exporter, and distributor of carbon steel and stainless-steel pipes and tubes. The company has many products, including stainless steel pipes, carbon steel seamless pipes, steel plates, industrial anchor fasteners, and polypropylene-coated pipes. It serves several industries, which include defense, power plants, shipbuilding, oil mills, and railways. The company is ISO 9001:2008 certified and is a member of ASTM, ANSI, and ASME, among other bodies.

    • Applied Alloys International

      • Applied Alloys International
        Duplex Pipe

      Company Overview

      Applied Alloys International, established in 1992 and based in Osborne Park, Australia, is a manufacturer and supplier of specialty products and engineered solutions. The company's product range includes carbon steel pipe, stainless steel flanges, chrome-moly materials, special alloys, and special steels. These products are used in applications that require durable and resilient materials. It serves the coal, chemical, mining, oil & gas, and energy industries. The company also offers services like custom solutions, rush deliveries, material certification, third-party testing, and inspection arrangements.

    • Langley Alloys

      Company Overview

      Langley Alloys, established in 1938, is a manufacturer and distributor specialising in high-performance alloys meticulously designed for naval and aerospace applications located in Newcastle Under Lyme, Staffordshire. The company product line includes bars, plates, and pipes, enabling global supply capabilities. It supplies duplex, super duplex, and austenitic stainless steels, along with copper and nickel-based alloys, to the offshore and petrochemical industries. These products boast a history of success in major defence, chemical, oil & gas, and aerospace industries.

    • STALESIA SP. Z O.O.
      • Poland Address: ul. Mariana Domagaly 19 30-741 Kraków Polska, Poland

      Company Overview

      STALESIA SP. Z O.O., headquartered in Krakow, Poland, operates in the wholesale distribution of stainless steel. It offers a diverse range of stainless steel products, including seamless tubes, stainless steel round rods, elbows, tees, and reducers. These materials find application across various industries due to its durability, corrosion resistance, and heat tolerance. Notably, the company holds certifications like ISO 9001 and approvals from esteemed bodies like TUV, PED 97/23/EC, Lloyd, and UDT, underlining its adherence to quality and compliance with industry standards.

    • Special Piping Materials

      Distributor Overview

      Special Piping Materials (SPM), established in 1989 and headquartered in Manchester, UK, is a supplier of exotic piping products with a network of warehouses and sales offices across five continents. It has many products, which include branch fittings, seamless pipes, flanges, butt weld fittings, and bars. These products are used in key components in various industries, including petrochemical sites, transportation facilities, water treatment plants, and mining sites. The company uses duplex, nickel alloys, super duplex, stainless steel, and 6% moly, and it has several accreditations, including ISO45001:2018, ISO14001:2010, OHAS 18001, and ISO9001:2015.

Duplex Pipe Manufacturer Ranking

*Including some distributors, etc.

Derivation Method

The ranking is calculated based on the click share within the duplex pipe page as of November 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.

Number of Employees

  1. DUPLEX STEEL & ENGINEERING COMPANY: 10

Newly Established Company

  1. PRIMINOX OVERSEAS: 2007 (17 years ago)
  2. JIAXING MT STAINLESS STEEL CO.,LTD.: 2006 (18 years ago)
  3. Corrosion Resistant Alloys, LCC: 2002 (22 years ago)

Company with a History

  1. SIBATA SCIENTIFIC TECHNOLOGY LTD: 1921 (103 years ago)
  2. Osaka Steel Tube Co., Ltd.: 1921 (103 years ago)
  3. Langley Alloys: 1938 (86 years ago)

Duplex Pipe Manufacturers in United States

*Including some distributors, etc.

Global Distribution of Duplex Pipe Manufacturers by Country

*Including some distributors, etc.

Country Number of Companies Share (%)
India India 15 46.9%
United States of America United States of America 5 15.6%
China China 5 15.6%
Japan Japan 3 9.4%
United Arab Emirates United Arab Emirates 1 3.1%
Poland Poland 1 3.1%
Germany Germany 1 3.1%
United Kingdom United Kingdom 1 3.1%

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