Are you searching for reliable threaded pipe fittings manufacturers and suppliers for your industrial projects? Which companies can provide both standard and custom fittings with consistent quality? How do you find suppliers that meet the demands of high-pressure, leak-proof, and durable piping systems?
This article highlights the leading manufacturers and suppliers of threaded pipe fittings worldwide, showcasing their expertise, product ranges, and global reach. From stainless steel NPT fittings to BSPP and BSPT connections, these companies serve industries such as oil and gas, chemical processing, water treatment, and automation. We focus on their production capabilities, quality certifications, customization options, and supply networks to give buyers practical insights for sourcing the right fittings.
We also introduce air-fluid, a trusted manufacturer and supplier of precision threaded pipe fittings, known for high-quality products and flexible solutions. Keep reading to learn more about the top brands and find the right partner for your projects.
List of the Top 10 Threaded Pipe Fittings Manufacturers and Suppliers in the World
| Brand | Headquarters | Key Products/Services |
|---|---|---|
| 1. Proflow Dynamics | Houston & Corona, USA | Stainless steel NPT fittings, camlock couplings, ball valves, Tri-Clamp sanitary fittings, custom/private-label fittings |
| 2. ASC Engineered Solutions | USA | Threaded pipe fittings, pipe joining systems, fire protection & plumbing components, engineering support, multi-brand supply |
| 3. Stainless Tubular Products | Monroe Township, USA | Threaded stainless steel fittings, butt & socket weld fittings, pipe nipples, flanges, stainless steel tubing |
| 4. Guenther Supply, Inc. | Fond du Lac, USA | Industrial pipe, valves & fittings, hoses, struts, gaskets, custom sourcing, 24/7 support |
| 5. Charlotte Pipe and Foundry | Charlotte, USA | Cast iron & plastic pipe/fittings, threaded connectors, large-diameter fabricated fittings, technical support |
| 6. Marcel Piping | India | Buttweld fittings, forged fittings, flanges, fasteners, custom alloy piping solutions |
| 7. United States Fittings™ | USA | Custom lateral/cross/wye fittings, shaped/stub/ threaded nipples, flanged fittings, design & fabrication services |
| 8. Zizi Engineering Co Ltd | Hong Kong, China | Carbon & stainless steel fittings, socket & butt weld fittings, flanges, custom threading/coating/fabrication |
| 9. Midland Industries | Kansas City, USA | Brass fittings, valves, hydraulic adapters, hose/pipe/tube fittings, supply chain & distributor support |
| 10. AirFluid | Zhejiang Province, China | Threaded pipe fittings, high-pressure pneumatic couplings, custom OEM piping solutions, precision components for industrial systems, quality inspection and ISO-certified support |
1. Proflow Dynamics
Introduction:
Proflow Dynamics is recognized by global buyers as a reliable threaded pipe fittings supplier offering fast-delivery solutions for stainless steel NPT fittings across the USA, Canada, and Mexico. Founded in 2007, the company operates from its main facilities in Houston, Texas, and Corona, California, serving OEMs, distributors, and regular industrial users who require consistent stock availability of threaded pipe fittings and related flow-control components. Unlike many threaded fittings manufacturers who operate on long lead times, Proflow Dynamics has built its reputation on keeping inventory aligned with customer usage to ensure critical stainless steel threaded connectors—such as NPT elbows, tees, couplings, nipples, reducers, and threaded caps—are always in stock. Their Class 150 stainless steel threaded pipe fittings, available in SS304 and SS316, are used in general industry, water systems, food & beverage processing, chemical transfer, and maintenance/repair applications where leak-proof threaded pipe connections are required.
As a brand trusted by resellers and OEMs, Proflow Dynamics not only supplies threaded fittings but also supports bulk projects, private-label requirements, and customized stainless steel components to match high-volume or special-spec piping systems. In addition to threaded pipe fittings, they provide camlock couplings, stainless steel ball valves, Tri-Clamp sanitary fittings, and brewery hardware, enabling buyers to consolidate their fluid-handling needs with one supplier. With same-day shipping and cost-effective pricing, the company helps distributors and factories maintain uninterrupted supply chains. For buyers searching for a threaded pipe fittings manufacturer with flexible stocking programs, quick order fulfillment, and the ability to source special-order threaded connectors, Proflow Dynamics remains a preferred partner.
Established: 2007
Headquarters: Houston, Texas, USA (Warehouse & Office) | Corona, California, USA (Warehouse & Office)
Key Products/Services:
- Stainless steel NPT threaded pipe fittings (Class 150) – SS304 & SS316
- OEM & distributor supply programs with personalized stocking support
- Camlock fittings and stainless steel ball valves
- Tri-Clamp and sanitary fittings for food, beverage & brewery applications
- Customized and private-label fittings for high-volume users
2. ASC Engineered Solutions
Introduction:
ASC Engineered Solutions is a globally recognized manufacturer and supplier of high-quality threaded pipe fittings and pipe joining products, serving industrial, commercial, and infrastructure markets worldwide. Formed through the merger of Anvil International and Smith-Cooper International, ASC brings together decades of engineering and manufacturing expertise to support customers who require reliable threaded fittings for plumbing, mechanical, fire protection, water, oil & gas, and industrial pipeline projects. With a comprehensive portfolio that includes stainless steel, malleable iron, brass, ductile iron, and carbon steel threaded fittings, the company is favored by contractors, distributors, and engineering firms looking for long-lasting and standards-compliant threaded joints. ASC is well known for Class 150 threaded pipe fittings such as elbows, tees, unions, reducers, couplings, bushings, nipples, and outlet fittings that are engineered to deliver consistent performance, leak-resistance, and long service life.
Supporting customers across North America and international markets, ASC Engineered Solutions goes beyond manufacturing to provide engineered services, digital design tools, and customized sourcing options—helping buyers simplify specification, procurement, and installation of threaded piping systems. Their strong supply chain, extensive stocking network, and multi-brand product lines (including Anvil, SCI, Gruvlok, Sharpe, and more) enable rapid delivery and dependable availability. For users searching for a threaded pipe fittings manufacturer capable of engineering support, certified products, and project-ready documentation, ASC is viewed as a top-tier partner offering both standard threaded fittings and engineered connection solutions designed to “build connections that last.”
Established: ASC brand introduced in 2021 (Root companies date back over 150 years)
Headquarters: United States (multiple regional operations across North America)
Key Products/Services:
- Threaded pipe fittings in stainless steel, malleable iron, brass, ductile iron & carbon steel
- Pipe joining systems & engineered connection solutions
- Fire protection, plumbing, mechanical & industrial pipeline components
- Digital design tools & engineering support for piping systems
- Customized sourcing and multi-brand supply programs
3. Stainless Tubular Products
Introduction:
Stainless Tubular Products (STP) is one of the most reputable suppliers of stainless steel tubing, pipe, and fittings in the United States, serving a wide spectrum of industrial sectors with high-quality stainless steel flow solutions. Headquartered in Monroe Township, New Jersey, the company is recognized as a leading threaded steel pipe fittings supplier offering an extensive inventory of stainless steel threaded pipe fittings, butt weld fittings, socket weld fittings, pipe nipples, and flanges. With a strong focus on stainless steel and high-alloy grades, STP provides products engineered for durability, corrosion resistance, and reliable performance in demanding environments such as chemical processing, food & beverage, water treatment, petrochemical systems, and structural applications.
As a trusted manufacturer and stocking distributor, STP offers threaded stainless fittings in multiple pressure classes—150# and 3000# (with 2000#, 6000#, and 9000# available upon request). These fittings are offered in a wide range of stainless steel and nickel alloy grades including 304/304L, 316/316L, Alloy 20, 600, 625, C276, and AL6XN, meeting the requirements of specialized and corrosion-intensive applications. With one of the nation’s largest inventories of stainless steel tubing—including round, square, and rectangular options—STP also provides in-house cutting, polishing, and finishing services to deliver customized solutions. Combining large-scale inventory, fast quotation support, and strong supply capability, STP is a preferred sourcing partner for threaded stainless steel pipe fittings and tubing in North America.
Established: 2000
Headquarters: Monroe Township, New Jersey, USA
Key Products/Services:
- Threaded stainless steel pipe fittings (150# & 3000#)
- Butt weld and socket weld stainless steel fittings
- Stainless steel pipe nipples and flanges
- Stainless steel tubing (round, square & rectangular)
- Custom cutting, deburring & polishing services
4. Guenther Supply, Inc.
Introduction:
Founded in 1956 and headquartered in Fond du Lac, Wisconsin, Guenther Supply, Inc. is a long-established distributor specializing in industrial pipes, valves, fittings, and hose products. With nearly seven decades of industry experience, the company has earned a strong reputation for high-quality piping supply solutions, reliable delivery, and knowledgeable technical support for commercial, industrial, and manufacturing customers across the United States.
Guenther Supply provides a broad portfolio of products sourced from leading manufacturers, including malleable iron, carbon steel, stainless steel, ductile iron, brass/bronze, PVC/CPVC, copper, polypropylene, and specialty alloy fittings. Supported by modern real-time inventory systems, a dedicated logistics team, and 24/7 emergency service, the company ensures timely availability, responsive service, and dependable supply to meet critical application needs. By combining extensive product range, service expertise, and a customer-first approach, Guenther Supply has evolved from a regional PVF wholesaler into a trusted full-line piping supply partner for HVAC, OEM manufacturing, construction, food processing, utilities, and maintenance industries.
Established: 1956
Headquarters: Fond du Lac, Wisconsin, USA
Key Products/Services:
- Industrial pipe, valves & fittings (PVF) distribution
- Stainless, carbon steel, ductile iron & alloy fittings and flanges
- Hose, hangers, strut, sealants, gaskets & piping accessories
- Custom sourcing & piping supply services
- 24/7 emergency supply support
5. Charlotte Pipe and Foundry
Introduction:
Charlotte Pipe and Foundry, founded in 1901 and headquartered in Charlotte, North Carolina, is a fifth-generation, family-owned manufacturer best known for producing a complete range of American-made pipe and fittings. While their core strength lies in cast iron and plastic plumbing systems, the company also supports specifiers and distributors who require threaded pipe fittings by integrating threaded components into comprehensive plumbing assemblies and systems. Combining over a century of foundry experience with modern production technology, Charlotte Pipe emphasizes product consistency, dimensional accuracy, and regulatory compliance—qualities buyers look for when sourcing threaded pipe fittings from an established manufacturer with in-house casting, fabrication, and finishing capabilities.
For purchasers searching explicitly for threaded pipe fittings manufacturers and suppliers, Charlotte Pipe offers advantages that go beyond standalone parts: vertical manufacturing control, extensive technical documentation, value-engineering support, and regional stocking to speed project delivery. Their product portfolio and services enable contractors, wholesalers, and mechanical specifiers to consolidate purchases—matching threaded connectors with compatible cast iron or plastic piping systems, accessing specialty coatings or large-diameter fabricated fittings, and obtaining application guidance for leak-resistant threaded joints in commercial, municipal, and industrial projects.
Established: 1901
Headquarters: Charlotte, North Carolina, USA
Key Products/Services:
- Cast iron and plastic pipe & fittings (including threaded connectors integrated into systems)
- Large-diameter fabricated fittings and specialty coated components
- Technical support, value engineering, and product documentation
- Domestic manufacturing with multi-plant production and regional distribution
- Custom finishing and application-specific fabrication
6. Marcel Piping
Introduction:
Marcel Piping Projects Supply Pvt. Ltd. is a prominent India-based manufacturer and supplier specializing in industrial piping solutions, including buttweld fittings, forged fittings, threaded pipe fittings, and flanges. With a production facility covering 12,000 square meters and a 4,000 square meter modern factory and administrative area, Marcel Piping has established itself as a reliable provider for industries such as oil & gas, petrochemicals, power generation, shipbuilding, and hydroelectric projects.
Founded with a commitment to quality and customization, Marcel Piping manufactures products in carbon steel, stainless steel, alloy steel, high nickel alloys, Inconel, Monel, Alloy 20, and copper-nickel. Their threaded pipe fittings are available in compliance with ASME B16.11, ASTM A182, ASTM A105 standards, and can be customized according to client specifications. The company maintains strict quality control and provides EN 10204 3.1B test certificates, supported by third-party inspections from SGS, Bureau Veritas, Lloyd’s Register, and others.
Marcel Piping’s global clientele includes major industry players such as SABIC, Qatargas, KNPC, Saudi Electricity Company, BHEL, BARC, ONGC, Indian Oil, Foster Wheeler, and Van Leeuwen. Their focus on high-quality, durable, and customizable threaded pipe fittings makes them a trusted manufacturer and supplier for complex piping projects worldwide.
Established: 2000s (India)
Headquarters: India
Key Products/Services:
- Buttweld Pipe Fittings (Elbow, Tee, Reducer, Cap, Stub End, Bend)
- Forged Pipe Fittings (Socket Weld, Threaded, Outlets, Nipples)
- Industrial Flanges (Weld Neck, Slip-On, Threaded, Blind, Socket Weld, Lap Joint)
- High-Quality Fasteners (Bolts, Nuts, U-Bolts, Studs)
- Customized Alloy Steel and Nickel Alloy Piping Solutions
7. United States Fittings™
Introduction:
United States Fittings™ (USF) is a leading USA-based manufacturer and supplier specializing in custom pipe fittings made from carbon steel, stainless steel, and aluminum. With over 40 years of experience serving some of the world's most demanding industries, USF provides high-quality, precision-engineered pipe fittings tailored to meet each client’s unique specifications. Their extensive product line includes laterals, crosses, true wyes, tees, shaped-nipples, stub ends, P-traps, return-bends, and flanged fittings, all fabricated in the USA.
The company offers end-to-end solutions for custom pipe fitting projects, including design, fabrication, inspection, testing, material certification, and on-time delivery. Their highly skilled technicians utilize advanced fabrication techniques and can perform radiographic, magnetic particle, and dye penetrant inspections to ensure every product meets stringent quality standards. USF’s commitment to traceability and certifications guarantees clients receive reliable and fully compliant piping solutions for power, petroleum, pharmaceutical, chemical, and other industrial sectors.
Established: 1980s
Headquarters: USA
Key Products/Services:
- Custom lateral, cross, and true wye pipe fittings
- Shaped-nipple, threaded-nipple, and stub end fittings
- P-traps, return-bends, and flanged fittings
- Custom design and fabrication services
- Inspection, testing, and material certification services
8. Zizi Engineering Co Ltd
Introduction:
Zizi Engineering Co Ltd (ZZ Fittings) is a professional manufacturer and supplier of industrial pipe fittings, flanges, and fasteners based in Hong Kong, serving customers globally since 2010. The company specializes in high-quality carbon steel, stainless steel, alloy steel, and super duplex steel pipe fittings, offering solutions for construction, petrochemical, oilfield, and industrial machinery projects. ZZ Fittings provides threading, coating, processing, and fabrication services to meet specific project requirements while ensuring quality and timely delivery.
The company operates in-house manufacturing facilities in Shanghai and Cangzhou, China, equipped with modern production lines to fabricate steel pipe fittings and flanges with superior quality standards. All products are certified by API, CE, and ISO 9001. ZZ Fittings emphasizes technical precision, strict quality control, and traceability for every product, ensuring compliance with international standards including ASME B16.9, B16.11, and BS3799. Their product range includes threaded fittings, socket weld fittings, butt weld fittings, flanges, caps, elbows, tees, nipples, and more.
Established: 2010
Headquarters: Hong Kong, China
Key Products/Services:
- Carbon steel, stainless steel, alloy steel, and super duplex threaded fittings
- Socket weld, butt weld, flanges, and pipe caps
- Custom threading, coating, fabrication, and processing
- Inspection, testing, and certification services
- Supply to construction, petrochemical, oilfield, and industrial machinery sectors
9. Midland Industries
Introduction:
Midland Industries is a leading American supplier and manufacturer of industrial fittings, valves, and related components, serving diverse markets including oil & gas, agriculture, automotive, marine, and industrial sectors. Established with multiple operational locations across the USA and Canada, the company combines extensive product selection with innovative customer-driven solutions. Midland Industries emphasizes quality, reliability, and fast delivery while maintaining a strong commitment to family values and business traditions.
Their product portfolio includes brass fittings, stainless steel adapters, hydraulic fittings, hose barbs, pipe fittings, valves, and aluminum tubing. Midland Industries focuses on providing custom-engineered solutions, packaging, and supply chain services to distributors and OEMs, ensuring that both standard and specialized needs are met efficiently. The company also offers technical support and marketing tools to enhance distributor and end-customer satisfaction.
Established: 2018
Headquarters: Kansas City, Missouri, USA
Key Products/Services:
- Brass fittings, valves, and hydraulic adapters
- Custom industrial components and machined parts
- Hose, pipe, and tube fittings including stainless steel and aluminum options
- Supply chain solutions and distributor support programs
- Technical support, packaging, and marketing services
10. AirFluid
Introduction:
AirFluid, established in 2010 and headquartered in Ningbo, China, is a professional manufacturer and supplier specializing in high-quality threaded pipe fittings for industrial piping systems. The company serves global markets including North America, Europe, and Asia, offering a wide range of precision-threaded solutions such as NPT, BSPP, and BSPT fittings. With ISO 9001 certification and advanced CNC threading machines, AirFluid ensures leak-proof, durable connections for oil & gas, chemical processing, water treatment, and automation applications. Their product portfolio includes threaded elbows, couplings, unions, bushings, adapters, and high-pressure quick-connect fittings tailored for demanding industrial environments.
As a trusted supplier, AirFluid provides both standard catalog items and customized solutions, supporting OEMs, distributors, and industrial users with personalized production programs. The company emphasizes rigorous quality control, material certification, and global export-ready logistics, ensuring reliable delivery of threaded pipe fittings and pneumatic components worldwide. Their focus on precision manufacturing, technical support, and flexible customization positions AirFluid as a preferred partner for industries seeking dependable threaded pipe fittings manufacturers and suppliers capable of meeting specialized project requirements.
Established: 2010
Headquarters: Ningbo, Zhejiang Province, China
Key Products/Services:
- Threaded pipe fittings (NPT, BSPP, BSPT) – elbows, couplings, unions, bushings, adapters
- High-pressure quick-connect pneumatic fittings and metal couplings
- Custom OEM and industrial piping solutions
- Precision-threaded components for oil & gas, chemical, water, and automation systems
- Inspection, testing, and ISO 9001-certified quality control services
Conclusion
The global market for threaded pipe fittings is dominated by a mix of long-established manufacturers and innovative suppliers catering to industrial, commercial, and infrastructure needs. Leading brands such as Proflow Dynamics, ASC Engineered Solutions, and Stainless Tubular Products provide comprehensive solutions, ranging from stainless steel NPT fittings to butt weld, socket weld, and custom piping systems. Many of these companies emphasize high-quality materials, precision engineering, and extensive distribution networks to serve OEMs, distributors, and industrial users worldwide. Other notable suppliers, including Guenther Supply, Charlotte Pipe and Foundry, and Midland Industries, focus on full-line piping solutions, incorporating emergency support, custom fabrication, and extensive technical documentation for complex projects.
Across the globe, specialized manufacturers like Marcel Piping, Zizi Engineering Co Ltd, and United States Fittings™ provide tailored solutions, offering threaded pipe fittings in a variety of materials and standards. Their expertise includes engineered connection systems, high-alloy applications, and project-specific customization, supporting industries from oil & gas to chemical processing and automation. These companies exemplify the growing importance of precision, reliability, and compliance in threaded pipe fittings production.
Building on this global expertise, AirFluid stands out as a precision-threaded pipe fittings manufacturer and supplier based in Ningbo, China. Established in 2010, AirFluid provides ISO 9001-certified threaded fittings and high-pressure pneumatic components for industrial piping systems worldwide. With advanced CNC threading technology, a wide range of NPT, BSPP, and BSPT fittings, and custom OEM capabilities, AirFluid delivers leak-proof, durable connections for oil & gas, chemical, water treatment, and automation applications. By combining quality manufacturing, global distribution, and flexible customization, AirFluid is positioned as a reliable partner for buyers seeking specialized threaded pipe fittings solutions.
