Howco Group
- Supply chain management, global procurement and product transformation specializing in steel bar and tubular products.
- http://howcogroup.com/

Prairie Tubulars Inc.
- Wholesalers of API and OCTG products, offering seamless tubing and casing with standard and premium EUE connections.
- http://www.prairietubulars.com/

Well Craft Tubular Co.
- Supplies Canadian drilling contractors with drill pipe. Includes a product brochure and current inventory.
- http://www.wellcraftco.ca

Maverick Tube Corporation
- Manufactures electric resistance welded pipe used in energy-related industries for drilling and production applications, oil country tubular goods and line pipe for surface handling and transportation of oil and natural gas. (Nasdaq: MAVK).
- http://www.maverick-tube.com/

Denkey Engineering Sdn Bhd
- Fabrication of process piping for oil & gas industries, chemical industries and general industries.
- http://denkey.8m.com

Bob Beck Tubulars
- New and used oil field pipe, tubing, pumping units, rods, and casing.
- http://www.bobbecktubulars.com

Riverview Resources
- Pipe, tubing and tools for oil and gas drilling. Special drilling equipment. Operating worldwide.
- http://www.riverviewresources.com/

Mannesmann Line Pipe GmbH
- Providing HFI-welded steel line pipe.
- http://www.mannesmannlinepipe.com/

Republica Trading Ltd.
- Worldwide distributor of a wide assortiment of oil field casing, tubing, drill pipe, line pipe, tubes for special purposes (boilers, and heat exchangers). Cold-drawn and hot-rolled steel. Based in Romania.
- http://www.r-trading.net/

Atlas Tubular
- Oil country tubulars. Based in Texas, providing tubulars worldwide.
- http://www.atlastubular.com

Full Supply Ltd.
- Supplying piping material, valves and other associated components in all grades, sizes and schedules to companies all over the world.
- http://www.fullsupply.co.uk/

Trouvay and Cauvin
- Manufacturing and selling pipes, fittings, flanges, valves and related equipment for transfer of fluids. UK/French companies operating internationally.
- http://www.trouvay-cauvin.com/

Tenaris
- Tubing, casing, connections and accessories, seamless and welded pipes with coatings and accessories. On-site delivery worldwide.
- http://www.tenaris.com/

Fiberspar
- Designer and manufacturer of fiber-reinforced spoolable pipe used in the oil and gas field.
- http://www.fiberspar.com/

Petroleum Pipe Company Ltd
- Supplies API, casing, and line pipe to the oil, gas, and water industries. Offices in Azerbaijan, Russia, Romania, Kazakhstan, United Arab Emirates, United States and Venezuela.
- http://www.petpipe.co.uk/

NS Group
- Manufactures a great variety of welded and seamless oil industry tubulars.
- http://www.nsgrouponline.com/

GB Tubulars, Inc.
- A worldwide distributor of oil country tubular goods. Carries an inventory of casing and tubing connections. Includes a list of products with technical details.
- http://www.gbtubulars.com/

Alexander Steel Sales, Inc.
- International sales of steel tubular drill pipe. Specializes in large size oil and gas casing. Based in Houston, Texas.
- http://www.assioctg.com/

Benoit Machine, Inc.
- Provides tubing and tubular accessories. Includes information on product manufacturing and handling procedures.
- http://www.benoit-inc.com/

Well Site International Services Incorporated
- Servicing the energy and industrial markets. Products and services include oil country tubular goods, casing, tubing, couplings, line pipe, castings, steel bars, coils, billets, and mechanical tubing. Headquartered in Houston, Texas.
- http://www.wsiservicesinc.com/