Duplex Instrumentation Fittings in imperial and metric sizes. Compare quotes from verified suppliers on MetalMitra, with MTC 3.1 and worldwide delivery.
- Duplex Instrumentation Fittings
- Seamless Tubing
- Compression Fittings
- Needle Valves
- Manifolds
- High Pressure
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Specifications
| Standard | DIN, ASTM, BS and all International Standards |
|---|---|
| Size | 1/16"OD to 2"OD, 2mm OD to 50mm OD |
| Grades | WERKSTOFF NR 1.4462 UNS S31803, S32550 |
| Application | Heat Exchangers, Instrumentation, Hydraulic & Pneumatic system, Nuclear Power Plants, Automotive industries, Aerospace, Medical, Pharmaceutical |
Duplex Instrumentation Fittings for leak-tight instrument and hydraulic lines, available on MetalMitra in imperial and metric sizes, with mill-certified traceability on every lot.
Duplex Instrumentation Fittings include seamless and welded instrumentation tubes together with compression fittings, connectors and valves used to carry process fluids and signals safely to instruments.
Duplex stainless steel has a two-phase austenitic-ferritic structure that delivers higher strength than standard austenitic grades together with good resistance to pitting, crevice corrosion and chloride stress corrosion cracking.
Product range
- 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.
Why engineers choose it
- High Strength — Roughly double the yield strength of standard 300-series grades.
- Corrosion Resistance — Strong resistance to pitting, crevice and general corrosion.
- SCC Resistance — Far better resistance to chloride stress corrosion cracking.
- Cost Efficient — Thinner walls and long life trim material and lifecycle costs.
Where it is used
- Oil & Gas
- Chemical Processing
- Petrochemical
- Desalination
- Marine Applications
- Pulp & Paper
- Heat Exchangers
- Pressure Vessels
- Water Treatment
- Offshore Platforms
- Fabrication
- General Engineering
Inspection & paperwork
Suppliers on MetalMitra back Duplex Instrumentation Fittings with the checks and paperwork your QA team expects.
- 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
Material 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.
The MetalMitra advantage
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Get a quote
Tell us the specification, quantity and destination you need for Duplex Instrumentation Fittings. MetalMitra connects you with suppliers who can deliver.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.
Applications & industries
- Oil & Gas
- Chemical Processing
- Petrochemical
- Desalination
- Marine Applications
- Pulp & Paper
- Heat Exchangers
- Pressure Vessels
- Water Treatment
- Offshore Platforms
- Fabrication
- General Engineering
- Oil & Gas
- Petrochemical & Refining
- Chemical Processing
- Water & Wastewater
- Desalination
- Marine & Shipbuilding
- Pulp & Paper
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
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