PVC CLAMP ORANGE WITH NAIL 1/2" ( TINGI 5 PIECES ) PVC clamp hangers are a type of clamp hanger that specialize in supporting pipes, cables, wires, and conduits. While PVC clamp hangers are similar to metal clamp hangers, their specialties and purposes differ. A pipe clamp is a type of clamp often employed in woodworking, piping or cabinet shops. When referring to woodwork or cabinet shops, pipe clamps are usually composed of commercially manufactured clamp heads or "jaws" and a length of common threaded pipe. The capacity of the clamp is determined by the length of the pipe used. When referring to piping, pipe clamps are used to connect the pipe to the pipe hanger assembly.