Cap Fittings
Premium quality cap fittings for sealing pipe ends and system closure
Premium Cap Fittings
Starlight Tubes supplies high-quality cap fittings designed for sealing the ends of pipes. Our caps provide complete closure solutions and are essential for system maintenance, testing, and temporary shutdowns in piping systems.
Available in multiple connection types including butt weld, socket weld, and threaded, our cap fittings are manufactured from premium materials and undergo rigorous quality testing to ensure leak-proof sealing and compliance with industry standards.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — Ellipsoidal Buttweld End Caps
Material and bursting pressure specifications for ASME B16.9 pipe end caps
| Material | ASTM Specification | Grades | Forming Process |
|---|---|---|---|
| Carbon Steel | ASTM A234 | WPB | Hot Deep Drawing / Die Pressing |
| Stainless Steel | ASTM A403 | WP304L, WP316L, WP321 | Cold Spinning / Deep Drawing |
| Low Temp | ASTM A420 | WPL6 | Hot Pressed + Normalized |
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Your Trusted Cap Fittings Supplier
Starlight Tubes delivers premium cap fittings with unmatched quality and reliability for sealing pipe ends in piping systems.
Frequently Asked Questions on Cap Fittings
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Pipe caps are used to seal the end of pipes permanently or temporarily. They are essential for system testing, maintenance shutdowns, future expansion provisions, and closing off unused pipe ends in piping systems.
Request Project Quotation for Cap Fittings
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.