Duplex Stainless Steel Pipe

Duplex stainless steel is a chemical composition which is a mixture of approximately equal parts of ferrite and austenite. The mixture of these components makes the duplex stainless steel pipes twice as strong as regular austenitic or ferritic stainless steel pipes. Duplex stainless steel pipes show excellent stress corrosion cracking resistance (SCC). Duplex stainless steel pipes are resolute and tough and can manage temperatures up to minus 80 degrees C. The strength of the duplex stainless steel pipes makes it possible to weld on the thicker sections of the pipe. However, this should be done with uttermost care. These pipes offer high strength which in turn leads to weight saving. Compared to most pipes in the industry, duplex stainless steel pipes have one of the best price stability. Due to its low cost and weight saving, in the recent years, duplex stainless steel pipes have been growing in popularity as an alternative to nickel alloy based pipes.

There are also two types of duplex stainless steel pipes that are manufactured they are :

Seamless duplex stainless steel pipes :A seamless duplex stainless steel pipe is manufactured from solid round billets, thus there are no welding or joints.
Welded duplex stainless steel pipes :welded duplex stainless steel pipes are pipes that are brought to a union by applying high levels of heat or by applying accelerated pressure.

Duplex Stainless Steel pipes serve many different applications in these industries :

Chemical Process
Petrochemical
Oil & Gas
Pharmaceutical
Geothermal
Sea Water
Water Desalination
LNG (Liquefied Natural Gas)
Biomass
Mining
Utilities
Nuclear Power
Solar Power

At GNEE steel we manufacture duplex stainless steel pipes in different grades such as :

2101 LDX
DX2202
RDN 903
2304
2205
2507
Zeron 100
Ferrinox
255/
Uranus 2507Cu

Duplex Stainless Steel Pipe Fittings
Duplex Stainless Steel Tube Fittings
Duplex Stainless Steel Flanges
Duplex Stainless Steel Tubing
Duplex Stainless Steel Plates
Duplex Stainless Steel Sheets
Duplex Stainless Steel Fasteners
Duplex Stainless Steel Valves
Duplex Stainless Steel Bars

We stock and outsource duplex pipes from ½” OD to 48” OD.
We provide the following value addition to the pipes:

Cut To Length: Duplex Stainless Steel Pipes can be supplied in full sizes or cut to length as required by the clients.
Beveling: Duplex Stainless Steel Pipes can be beveled at the ends to make it suitable for welding purposes and other applications.
Polishing: Duplex Stainless Steel Pipes can be polished for mirror finish of various classes such as #4,#6,#7 class finish.
Heat Treatment: To change the mechanical properties of Duplex Stainless Steel Pipes and make it suitable for some applications, Duplex Stainless Steel Pipes can also undergo heat treatment process.
Positive Material Identification: We have an in-house PMI machine to identify all the pipes while arrival and dispatch so as the pipes match to order specifications and client requirements.
Suggestions: We offer various suggestions and alternatives depending on the client size and application requirements.
Threading: We can also providing external threading to the pipes, in NPT, BSPT & BSPP threads if required by the clients.
Pipes supplied by Instinox are procured from A-Class mills around the world. Our intelligent procurement system tracks real-time prices of Duplex Stainless Steel Pipes and the available quantities in the industry as well as in stock. We are able to provide rock bottom prices to the customers with immediate delivery for small and major needs in standard sizes.

As a Duplex Stainless Steel Pipes suppliers, GNEE steel 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 Duplex Stainless Steel Pipes are checked in house for Surface Finish, Compliance to specifications as per ASTM Standards, Outer Diameter, Thickness, Inside Diameter, Inside Finish, Marking, Ends and Finishing. This ensures that we never face a rejection for the Duplex Stainless Steel Pipes supplied.

Duplex Stainless Steel Pipes Suppliers 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 pipes are bundled in bubble wrap followed by assorting them in colored plastic bundles. Then an outer rope is tied to protect the pipes and they are packed in wooden box or container.
We provide Duplex Stainless Steel Pipes with documents such as commercial invoice, packing list, Test Reports, HS Code, Country of Origin attested by the chamber of commerce, Fumigation Certificate, Warranty Letter, and Base Material Certificates.

Each heat and lot of Duplex Stainless Steel Pipes are 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 the customer at an extra cost.