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4130 API Hubs and Clamps
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RBV Energy supply 4130 API 16A hubs and clamps, manufactured from high-strength low alloy AISI 4130 steel. The hubs have a ring groove which creates a sealed unit when bolted together with the corresponding clamp. API Clamp numbers are designed to attach to a range of hub sizes (see pdf brochure for details).
API size designations (inches)
2 1⁄16,
2 9⁄16,
3 1⁄16,
4 1⁄16,
7 1⁄16 (other sizes available)
Butt weld end sizes
2"NB-6"NB, other sizes available
Max working pressures
5,000psi, 10,000psi, 15,000psi, 20,000psi
Product specification level (PSL)
PSL 3 as standard
Temperature ratings
P to U as standard (-29°C to 121°C) . Elevated temperature classes X (180°C) and Y (345°C) also available.
Material class
DD as standard, others available