Home > Product > Ferrule Fittings > High-Pressure Ferrule Fittings > Duplex & Super Duplex Ferrule Fittings
At Perfect Engineers, we proudly manufacture and export high-performance Duplex and Super Duplex Ferrule Fittings under our premium brand PE-LOCK. Engineered for extreme corrosion resistance, high-pressure durability, and excellent mechanical strength, these fittings are ideal for use in marine, offshore, desalination, chemical processing, and oil & gas industries.
These specialty ferrule fittings are designed for aggressive environments where standard stainless steel fittings may fail due to chloride stress corrosion, pitting, or erosion-corrosion.
Duplex and Super Duplex ferrule fittings are tube connectors made from dual-phase stainless steel alloys, combining both ferritic and austenitic structures. They offer twice the strength of 316L stainless steel and superior corrosion resistance in chloride-rich and acidic environments.
These fittings use a double ferrule system to create gas-tight, vibration-resistant, and reliable connections in high-pressure fluid systems.
| Parameter | Specification |
| Material Grades | Duplex: S31803 / F51 • Super Duplex: S32750/S32760 |
| Tube OD Range | 1/8” to 1” (3 mm to 25 mm) |
| Thread Options | BSP, NPT, BSPT, UNF, ISO, SAE, JIC |
| Pressure Rating | Up to 10,000 PSI |
| Temperature Range | -50°C to +300°C |
| Ferrule Type | Double Ferrule Compression |
| Certifications | ISO 9001:2015, MTC (3.1), Hydro-Test Report |
| Coating/Finish | As-machined or passivated (optional) |
| Compatibility | Swagelok®, Parker®, Hy-Lok® equivalent |
| Manufacturing Base | India (Perfect Engineers – Mumbai Facility) |
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These fittings are trusted in the world’s harshest fluid handling systems:
Yes. Super Duplex is particularly suited for seawater, brine, and chloride-rich systems.
Yes. PE-LOCK ferrule fittings match the dimensions and performance of global brands.
Up to 10,000 PSI, depending on the fitting size and wall thickness of the tubing.
Yes. Both sizing standards are available for global system compatibility.
Yes. Passivation and electropolishing can be provided for ultra-clean environments.
You will receive Material Test Certificates (MTC), hydro test reports, and dimensional inspection certificates.
Yes. BSPP, NPTF, UNF, and hybrid combinations are available upon request.
Low MOQs supported. Delivery typically in 7–12 working days based on stock and finish.
Absolutely. OEM support with branded packaging and engraving is available for distributors.
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