Riser assembly

A riser clamp for fragile pipe of a specified outside diameter, comprising

• two bars, each bar including a substantially hemicylindrical section, a long straight section on one end of the hemicylindrical section and a short straight section on the other end of the hemicylindrical section, each straight section having a through hole closely spaced equidistant from the hemicylindrical section;
• fasteners extendable through the through holes to retain the two bars together with the long straight sections juxtaposed with the short straight sections, respectively, the hemicylindrical sections of the two bars defining an inside diameter smaller than the specified outside diameter by not to exceed five percent with the long straight sections juxtaposed with the short straight sections, respectively.

A riser assembly comprising

• fragile pipe of a specified outside diameter;
• a clamp including two bars, each bar having a substantially hemicylindrical section, a first straight section on one end of the hemicylindrical section and a second straight section on the other end of the hemicylindrical section, each straight section having a through hole closely spaced equidistant from the hemicylindrical section, at least one of the first straight section and the second straight section on each of the two bars having a length greater than the radius of the hemicylindrical section, and fasteners extending through the through holes to retain the two bars together with the first straight sections juxtaposed with the second straight sections, respectively, the hemicylindrical sections of the two bars defining an inside diameter smaller than the specified outside diameter by not to exceed five percent with the first straight sections juxtaposed with the second straight sections, respectively.