Pipe band clamp - Parametric - not particularly strong with most extruded materials.

A secondary clamp may be integrated making it useful as a lab retort clamp.

Highly customizable - Pipe Diameter, regular Pipe Cross section, height, wall thickness, companion clamp, adjustable clamp phase.

Requires a bolt or bolts of the appropriate length and a wing nut or nuts.

Script Error caught by MarcoEve. Now corrected. Many thanks.