Introduction
The ASTM A403 WP316L Stub End is a stainless steel pipe fitting designed for use with lap joint flanges, allowing for easy disassembly of piping systems. Manufactured from low-carbon austenitic stainless steel 316L, it offers superior resistance to chloride-induced corrosion, acids, and seawater environments, making it an ideal choice for oil & gas, marine, chemical, and power plant applications.
This product is a seamless (SMLS) stub end, available in DN150 and DN100 sizes, with Schedule 80S wall thickness, designed as Lap Joint Type A according to international standards.
Key Features
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Material: ASTM A403 WP316L (Low-carbon stainless steel)
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Type: Seamless Stub End (SMLS)
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Design: Lap Joint, Type A
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Size: DN150 / DN100
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Schedule: SCH80S (heavy wall for high-pressure service)
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Corrosion Resistance: Excellent in seawater, chlorides, and aggressive chemicals
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Weldability: Low-carbon 316L grade minimizes carbide precipitation during welding
Specifications
| Item | Details |
|---|---|
| Standard | ASTM A403 |
| Material | Stainless Steel WP316L |
| Type | Seamless Stub End |
| Size | DN150 / DN100 |
| Schedule | SCH80S |
| Design | Lap Joint Type A |
| Applications | Offshore, Marine, Oil & Gas, Chemical Processing, Power Plants, Boilers |
Applications
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Oil & Gas Industry – flow lines, manifolds, refinery piping.
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Marine & Offshore – seawater cooling systems, desalination plants.
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Chemical Plants – piping for acidic and chloride-rich environments.
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Power Generation – boiler and heat exchanger piping.
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Industrial Piping Systems – where frequent disassembly is required.
Advantages of WP316L
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Superior Corrosion Resistance – molybdenum content improves resistance to pitting and crevice corrosion.
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Low Carbon (L Grade) – prevents intergranular corrosion after welding.
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Durable & Cost-Effective – long service life reduces maintenance costs.
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Easy Installation & Replacement – lap joint design allows quick assembly/disassembly.
Why Choose DLSS?
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Supply of complete pipe fittings: stub ends, elbows, tees, reducers, flanges.
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Strict Quality Control – PMI, Hydro, UT, ET, dimensional inspections.
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Third-Party Inspection – SGS, BV, TUV, LR certifications available.
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Export Packaging – PE caps, plastic wrapping, seaworthy wooden cases.
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Global Experience – delivered stainless steel pipe fittings to power, petrochemical, and offshore projects worldwide.
