Duplex Supply Inc. is Tubes manufacturer and  supplier. At Duplex Supply Inc. we manufacture our steel tube in a number of elements or alloys and we also design them for specific industrial applications. Our Steel tube is available in Stainless Steel, Carbon Steel and other materials. When compared to some other manufacturers of tubes, our steel tubes are proven to be a lot stronger and more robust, making it better suited for various structural applications and high-pressure flow of fluids and gases. Our Tubes are stocked from mills around the world and is designed to stand the highest amounts of pressures and duress. At Duplex Supply Inc. our steel tube goes through not only government laboratory testing, but private laboratory testing as well and is manufactured to  have a genuine and an impeccable surface finish.

As a Tubes suppliers, Duplex Supply is backed by all the possible certifications of a world class mill, including ISO 9001:2008, ISO 14001:2007, OHSAS 18001: 2004 & CE-PED 97/23/EC. We are also members of various renowned agencies and Chambers of Commerce including MASSMA, EEPC, FICCI, FIEO, Indian Merchants Chamber etc. 100% of steel tubes are checked in house for Surface Finish, Compliance to the specifications as per ASTM Standards, Outer Diameter, Thickness, Inside Diameter, Inside Finish, Marking, Ends and Finishing. This ensures that we have never faced a rejection for the tubes supplied.We stock and outsource tubing from 1/16” to 2”.Tubes are subject to surface wash and cleaning to remove all impurities with it being in stock. Then it is wrapped in thin plastic. The ends are protected by a plastic cap to avoid any damage in transit. Then tubing is bundled in bubble wrap followed by assorting them in colorful plastic goonies or bundles. Then an outer rope is tied to protect the tubing and they are packed in a wooden box or container.We provide Steel Tubing Suppliers with documents such as the commercial invoice, packing list, Test Reports, HS Code, Country of Origin attested by chamber of commerce, Fumigation Certificate, Warranty Letter, and Base Material Certificates.Each heat and lot of steel tubing is supplied with a material test certificate as per EN 10204 NACE 3.1 standards indicating the chemical and mechanical properties of the fittings along with pressure rating. We also confirm the guarantee of the fittings supplied as per Purchase order specifications and attest the same in the Material Test Certificate. We also welcome any third party inspection from an agency nominated by the customer to comply with NACE 3.2 Certification if required by customer at an extra cost.