Introduction
The ASME SA815 WPS32750 Stub End is a forged pipe fitting made from super duplex stainless steel (UNS S32750), designed for use with lap joint flanges in demanding applications. With a balanced austenitic-ferritic microstructure, S32750 offers exceptional strength (yield ≥550 MPa) and outstanding resistance to seawater and chloride-induced corrosion.
This stub end is DN100, SCH40S, seamless (SMLS), manufactured in Short Pattern Type B according to MSS-SP-43, suitable for high-strength and corrosion-critical systems in offshore, marine, chemical, and power plant applications.
Key Features
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Material: Super Duplex Stainless Steel WPS32750 (UNS S32750)
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Standard: ASME SA815 / MSS-SP-43
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Type: Stub End – Short Pattern, Type B
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Size: DN100 (4″ Nominal Bore)
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Schedule: SCH40S (medium wall)
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Manufacturing: Seamless (SMLS) for maximum integrity
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Strength: Yield strength ≥550 MPa
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Corrosion Resistance: Excellent against seawater, brine, acids, and chlorides
Specifications
| Item | Details |
|---|---|
| Standard | ASME SA815 / MSS-SP-43 |
| Material | Super Duplex Stainless Steel WPS32750 |
| Type | Stub End – Short Pattern, Type B |
| Size | DN100 (4″) |
| Schedule | SCH40S |
| Manufacturing | Seamless (SMLS) |
| Applications | Offshore, Marine, Oil & Gas, Desalination, Chemical & Power Plants |
Applications
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Offshore & Marine Engineering – subsea piping, seawater cooling, desalination.
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Oil & Gas Industry – risers, manifolds, and chemical injection lines.
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Power Generation – boiler piping, condensers, heat exchangers.
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Chemical Processing – acid piping, chloride-rich environments.
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Water Treatment – brine discharge, desalination plants.
Advantages of Super Duplex S32750
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High Strength – almost double that of standard stainless steel grades.
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Superior Corrosion Resistance – PREN > 40, strong protection against pitting and crevice corrosion.
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Chloride SCC Resistance – excellent for seawater and brine systems.
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Extended Service Life – reduces downtime and maintenance costs.
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Cost Efficiency – can replace higher-cost nickel alloys in many applications.
Why Choose DLSS?
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Full supply of super duplex fittings: elbows, tees, reducers, stub ends, flanges.
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Strict Quality Control – PMI, Hydro, UT, ET, dimensional checks.
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Third-Party Inspection – SGS, BV, TUV, LR certifications available.
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Global References – supplied super duplex products to offshore, petrochemical, and power projects.
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Export-Ready Packaging – PE caps, plastic wrapping, seaworthy wooden cases.
