a clamp system is provided for clamping one tubular to another , such as control lines to a marine choke and kill riser line . the riser clamp comprises a saddle and u - bolt arrangement . the upper surface of the saddle defines a track configured to receive a shoe attached to either the control line clamp or an extension leg attached to the control line clamp . the control line clamp comprises an upper clamp half , a lower clamp half , a hinge pin connecting the halves , a fastener latching the halves , and a support leg having a shoe for receipt by either the saddle structure or the extension leg . the control line clamp preferably contains an elastomeric liner . the elastomeric liner is preferably provided in two halves . the inner surface of each liner half preferably is provided with a non - skid layer to more firmly position the control line .