API Hubs and Clamps

RBV Energy supply 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