Super Duplex Steel Instrumentation Tubing & Fittings

Need a dependable super duplex instrumentation fitting? Super Duplex Steel Instrumentation Tubing & Fittings on MetalMitra come in imperial and metric sizes to ASTM A789, ready for leak-tight instrument and hydraulic lines.

Super Duplex Steel Instrumentation Tubing & Fittings include seamless and welded instrumentation tubes together with compression fittings, connectors and valves used to carry process fluids and signals safely to instruments.

Super duplex stainless steel combines a balanced austenitic-ferritic microstructure with high chromium, molybdenum and nitrogen content, giving very high strength and excellent resistance to pitting, crevice corrosion and chloride stress corrosion cracking.

Available forms & variants

• Instrumentation Tubing — Seamless and welded tubes for impulse and process lines.
• Compression Fittings — Single and double ferrule tube fittings.
• Needle & Ball Valves — Isolation and flow control for instrument lines.
• Manifolds & Accessories — 2, 3 and 5-way manifolds and tube accessories.

Performance highlights

• High Strength — Roughly twice the yield strength of standard austenitic stainless steels.
• Chloride Resistance — Excellent resistance to pitting and crevice corrosion in seawater and brine.
• Stress Corrosion Resistance — Strong resistance to chloride stress corrosion cracking.
• Weight Saving — Higher strength allows lighter designs in suitable applications.

Typical applications

• Offshore Oil & Gas
• Seawater Systems
• Desalination Plants
• Chemical Processing
• Petrochemical
• Pulp & Paper
• Marine Engineering
• Heat Exchangers
• Pollution Control
• Subsea Equipment
• Fabrication
• General Engineering

Quality checks & certification

Every lot of Super Duplex Steel Instrumentation Tubing & Fittings sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.

• Dimensional inspection
• Visual & surface inspection
• Grade verification against the order
• Hydrostatic / pneumatic testing as applicable
• Eddy current testing for tubing as applicable
• Positive Material Identification (PMI)
• EN 10204 3.1 Mill Test Certificate
• Project-specific documentation on request

Chemical & mechanical properties

Chemical composition and mechanical properties are supplied to the limits of the governing material standard. Actual heat values are reported on the mill test certificate shared with each consignment.

Why buy through MetalMitra

• Checked sellers only — Every supplier profile is screened by MetalMitra before it goes live.
• Faster sourcing — Post one requirement and receive competitive offers without chasing calls.
• Paperwork sorted — MTC 3.1, test reports and TPI arranged as your project demands.
• Global logistics — Seaworthy packing and dispatch to project sites across the world.

Ready to buy?

Send your size, grade, quantity and delivery location for Super Duplex Steel Instrumentation Tubing & Fittings, and matching suppliers on MetalMitra will come back with offers.

Technical note: Figures shown are indicative. Final acceptance should be based on the applicable standard, approved drawings and the MTC supplied with the material.