C.I. Thornburg

The C.I. Thornburg Co., Inc., is a full service solution provider for the water and wastewater industries. Our ANSI/AWWA and NSF-certified fabrication shop in Huntington, WV offers all configurations of flanged and fabricated ductile iron pipe as well as carbon and stainless steel pipe. C.I. Thornburg also offers a full...


Reliable Protection through Innovative Coatings.  A quality coating job takes more than quality coatings. It takes a quality coating system. Starting with a commitment to doing what’s right for the job. At Induron we invest ourselves in your success, your satisfaction and your reputation. Family-owned Induron Coatings manufacturers a variety...

U.S. Pipe Fabrication

With eleven locations, U.S. Pipe Fabrication is the largest independent ductile iron pipe fabricator in the United States. Since our beginning in 1991, it has been our mission to provide the finest fabricated products along with excellent local service across the United States. U.S. Pipe Fabrication has revolutionized the ductile...

SIGMA Corporation

SIGMA Corporation offers a wide range of waterworks, fire protection, and OEM products for customers at home and abroad. SIGMA’s innovative quality and supply chain processes have made us an industry leader, and we continue to develop new products and services, meeting the changing needs of our valued customers every...

Liberty Coatings

Liberty Coating is the East Coast’s premier applicator of industrial coatings for the oil, gas, and water industries. Located on 35 acres with 6 coating buildings covering over 110,000 square feet, Liberty Coating Company is a leader in the coating application industry. It is proud to be an industry recognized...

Clow Water Systems

The history of Clow Water Systems Company began in 1878 when 18 year old William E. Clow founded James B. Clow & Sons, a large plumbing supply distributor in Chicago, Illinois. Fearing that his youth would not serve him well within the Chicago plumbing trade, he decided to use his...

U.V. International

A Leader in Waterworks Flanges, Fittings and More Located in Cedar Knolls, New Jersey, U.V. International has been manufacturing and distributing general waterworks, flanges, fittings, accessories, and engineered castings to the North American agriculture, construction, lighting, pump/valve, OEM, and water/sewage industries for over 37 years. U.V. International is a full-service...

SIP Industries

SIP Industries / Serampore has been a manufacturer of quality castings since 1960. Products include Ductile Iron waterworks Fittings and Accessories, Ductile Iron Flanges, Joint Restraints, Municipal Castings. Joint Restraints and Municipal Castings available MADE IN USA!!

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Thank you for visiting the official site of the National Association of Pipe Fabricators. Inside you will find information about our organization, along with a listing of our members, our industry standards and links to industry sites. If you have a need for further information, please contact us and we will be happy to help you.

- NAPF Board of Directors