A pipe clamp is a type of clamp often employed in woodw […]
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.
In woodwork, a pipe clamp uses clamp heads produced commercially by numerous manufacturers. They are available in various diameter sizes, commonly 1/2”or 3/4”, suited to the same diameter piping. The pipe is usually threaded on both ends. One head is fixed on the pipe by spinning it onto standard pipe threads. This head includes the screw mechanism for tightening the clamp. The other, movable, head slides onto the other end of the pipe. This head has a mechanism, often a series of movable “clutches” which allow it to slide along the pipe when setting up the clamping operation but which lock onto the pipe when clamping pressure is applied.
The rings need to be of a harder material than the pipe. If they are not harder or equally hard they will simply slide along the pipe.
The pipe material also benefits from being a certain hardness. Galvanized pipe for example, does not work as well because the zinc coating is too soft and it fails under stress. It is also slightly larger so the angle that the ring bites into the pipe is reduced and it does not grab as easily.
Experiments like Ningbo Beilun Mingchi Hardware Manufacture Co.,Ltd., China Pipe Clamps Manufacturers, have been done by clamp makers over the years to find the best angle. It is a trade off between keeping the face of the ring as close to perpendicular to the pipe so it can resist sliding along the pipe and having the the face at a 45 degree angle to increase penetration into the pipe. The issue of wear and reliability will also play a part.