ASTM A403 WP316L Pipe Caps | SA403 WP316/316L ASME B16.9
We are a professional manufacturer of ASTM A403 WP316L pipe caps and SA403 WP316/316L stainless steel caps in China. Our products are manufactured in strict accordance with ASME B16.9 standards, ensuring dimensional accuracy, corrosion resistance, and long-term performance in industrial piping systems.
ASTM A403 WP316L caps are wrought austenitic stainless steel butt weld fittings designed to seal the ends of pipelines. With excellent resistance to corrosion, pitting, and chloride environments, WP316L pipe caps are widely used in chemical processing, oil & gas, marine, food processing, and pharmaceutical industries.
Product Specifications
Standard: ASTM A403/ ASME SA403
Dimensional Standard: ANSI / ASME B16.9, B16.28, MSS SP-43
Type: Butt Weld Pipe Caps
Manufacturing: Seamless / Welded
Material: WP316 / WP316L Stainless Steel
Size Range
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1/2″ NB to 48″ NB
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Schedules: SCH 10S, 40S, 80S, 160S, XXS
Starting Material
High-quality stainless steel plates or pipes.
ASTM A403 WP316L Chemical Composition (%)
| C | Mn | Si | P | S | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|
| ≤0.035 | ≤2.0 | ≤1.0 | ≤0.040 | ≤0.030 | 10–16 | 18–20 | 2–3 |
Mechanical Properties
| Tensile Strength | Yield Strength | Elongation |
|---|---|---|
| ≥ 515 MPa | ≥ 205 MPa | ≥ 35% |
Features of ASTM A403 WP316L Caps
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Excellent corrosion resistance
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Superior resistance to chloride environments
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Good weldability and formability
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Suitable for high-temperature applications
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Low carbon content reduces risk of intergranular corrosion
Available Pipe Fittings Materials
Stainless Steel:
ASTM A403 WP304 / 304L / 304H / 316 / 316L / 317 / 317L / 321 / 310 / 347 / 904L
Alloy Steel:
ASTM A234 WP5 / WP9 / WP11 / WP22 / WP91
Carbon Steel:
ASTM A234 WPB / A420 WPL3 / WPL6 / MSS SP-75 WPHY Grades
Quality & Inspection
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EN10204 3.1 Mill Test Certificate provided
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In-house inspection and third-party inspection available
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Standard marking or customized marking
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Export packing: fumigation-free wooden cases or as required
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