Precision-machined weld neck hubs featuring the signature internal taper-seal pocket.
Unlike bulky ANSI flange rings, CofferLok hubs feature a compact outer profile with a machined shoulder. This shoulder is designed to mate perfectly with the CofferLok external clamp segments, transmitting forces directly through the pipe axis.
CofferLok hubs are self-centering during assembly. As the clamp segments are tightened, they draw the hubs into perfect axial alignment, ensuring the internal seal ring sits exactly inside its pocket without pinching.
Machined from premium carbon steel, low-alloy steel, stainless steel, duplex, or nickel alloys. This matches the exact metallurgical properties of your piping specification, avoiding thermal stress discrepancies.
Every CofferLok hub is machined with our proprietary internal taper angle. This pocket encloses the metal seal ring completely, allowing system pressure to energize the seal and maintain absolute gas-tight closure.
CofferLok weld hubs are designed for seamless butt-welding directly into piping spools, manifold headers, vessel nozzles, or valve bodies.
With an ID matching the pipe schedule and a compact OD that fits in close-proximity pipe racks, CofferLok hubs streamline layout design and reduce mechanical load points.
Discuss your welding and spool design requirements with our metallurgical engineering team.
Request a Quote