Naman Duplex - Stainless Steel Seamless Pipe and Duplex Welded Pipe

More than 10 years of experience as a Duplex Pipe manufacturer in India, Exporter of Seamless/ Welded/ ERW Duplex Stainless Steel Pipe in round, square or custom shapes accordance to ASTM A790/ A789 American standards and specifications

What is duplex steel pipe used for?

Duplex Steel Pipes are always employed in the offshore oil and gas industry. The metal is less expensive because of the decreased nickel concentration used to alloy Duplex Pipe. The enhanced molybdenum and chromium content of the Duplex EFW Pipes offers the material stronger corrosion resistance than regular DSS grade.

Due to its unique properties, duplex stainless steel pipe is widely utilised in petrochemical equipment, saltwater and wastewater treatment equipment, oil and gas pipelines, paper-making machinery, and other industrial industries. It has also been applied in bridge-bearing structures, with a promising future.

Duplex seamless vs. welded pipe.

The high molybdenum, chromium, and nitrogen composition of Duplex Seamless Pipe result in solid resistance to chloride pitting and crevice corrosion attack. The addition of yttrium to DSS Seamless Pipes enhances chromium and aluminium oxide scale adhesion and spalling resistance. It is advised to use gas from Air for heavier joints in Duplex Stainless Steel Pipes to lessen the risk of weld solidification fractures.

On the other hand, DSS Welded Pipe offers much more excellent tensile strength qualities. They have good weldability and may be welded using any standard welding method, though they are not easily welded. It is neither like the welding heat-affected zone of ferritic stainless steel, where the plastic toughness is considerably reduced due to grain coarsening, nor is it like austenitic stainless steel, which is more vulnerable to welding hot fractures.

We are one of the leading Duplex Pipe manufacturers who provide excellent corrosion resistance and high strength. Our company`s Duplex ERW Pipe is machined using the most recent machining technology, resulting in a better finish.

• Duplex Pipe Specification
• Why choose Naman Pipe & Tubes?
• Duplex Pipe Price List
• Different Types of Duplex Steel Pipes
• DSS Pipe Chemical Composition
• Duplex Welded Pipe Mechanical Properties
• Duplex Seamless Pipe Equivalent Grade
• DSS ERW Pipe Dimensions
• Duplex Stainless Steel Pipe Thickness
• DSS Seamless Pipe Sizes
• Duplex Stainless Steel Pipe Schedule Chart
• DSS Pipe Weight Chart
• Manufacturers` Marking on Duplex Pipe
• Advantages of Duplex Pipe
• Seamless Duplex Pipe Surface Roughness Chart
• DSS Pipe Pressure Rating
• DSS Welded Pipes Tolerances
• Tolerances on wall thickness of Seamless Duplex Pipe
• Specific heat capacity of DSS Pipe
• Duplex Stainless Steel Pipe Roughness
• DSS Pipe HS Code
• DSS Pipe Applications
• Duplex Pipe Welding Procedure
• Duplex Steel Pipes Stock List
• Various Manufacturing Process Of DSS Pipe

• Size:  Out Diameter:10.29mm-812.80mm
• Thickness:1.00mm-60.00mm
• Length:6m or as customer demands
• Tolerance: a) OD:+/-0.2mm b) Thickness:+/-10% c) Length:+/-5mm
• Processing Service: Cutting, Welding, Punching, Bending, Decoiling, Moulding
• Manufacturing Shapes: Box Section, Round, Square, Rectangle
• Manufacturing types: ERW, Welded, Seamless, EFW
• Surface: 180G, 240G, 320G Satin / Hairline 400G, 600G Mirror finish
• Pipes Schedules: SCH20, SCH40, STD, SCH80, SCH30, SCH120
• Inspection Test Reports By Duplex Pipe suppliers: PMI Test Reports, NABL Approved Lab Reports, Certificates, Mechanical Reports, Chemical Reports, EN 10204 3.1, Mill Test, Third Party Inspection, Visual Inspection Reports, Destructive and Non Destructive Test Reports
• Length: Single Random Length(SRL), Double Random Length (DRL),Fix Length, Range 1, 2 and 3, Maximum upto 14Mtr
• Processing: Turning, Drilling, Milling, Stamping, Swaging, Enlargment, Bending, Punching, Reduction
• Test Certificate
• Third Party Inspection (TPI)
• Moisture testing
• Surface roughness measurement
• 100% Radiography Test Report
• Manufacturer Test Certificate
• DFARS compliant
• Raw Materials Certificate
• Fumigation Certificates
• Heat Treatment Charts
• Form A for Generalized System of Preferences (GSP)
• HS Code Commercial Invoice

• Value Added Services: Honing, Mirror Polish, Crome Plating, Washing, De Rusting, Swaging, Bulging