Abstract: The present invention provides a clamp assembly which is movable between a first condition wherein the clamp assembly can be fitted to or removed from a riser, and a second condition wherein the clamp assembly is secured to the riser. The clamp assembly comprises a clamping device having an inner clamping face which, in use, is adapted to engage the external surface of the riser. The clamping device also comprises a recess in an outer face. The clamp assembly further provides a fastening means received in the recess wherein the fastening means facilitates movement of the clamp assembly between the first condition and the second condition. The clamp assembly further comprises a resilient means which co-operates with the fastening means and the clamping device wherein the resilient means accommodates variations in the diameter of the inner clamping face of the clamping device when the clamp assembly is in the second condition.

Abstract: A clamp element is provided that has a T-shaped body with laterally extending portions on either side of a radially projecting tang. A plurality of the clamp elements are joined together in an array to form a clamp assembly with the tangs facing outwardly. Straps having looped ends are disposed around the array. The looped ends of the straps are engaged with respective cross bar members. Adjacent cross bar members are connected together by means of a threaded bar which is arranged to tighten the straps around the array of clamp elements.