Hough section diameter classification

Hough is a pipe plugging device. It is a device for repairing parts other than the socket. The device is simple in structure consisting of only two pieces of body and two pieces of rubber pad. It is easy to install. It can be completed only by tightening the nut between the two bodies at the leaking point. Emergency repairs, using the device can not only save water time, but also reduce repair costs.

The diameter of the tube Hough section is divided into outer diameter, inner diameter and nominal diameter. The diameter of the outer wall of the pipe is called the outer diameter, and the diameter of the inner wall is the inner diameter. The nominal diameter is the nominal diameter specified in the standard. The specifications of the welded steel pipe (black pipe) for low-pressure fluid transportation and the galvanized welded steel pipe for low-pressure fluid transportation are represented by the nominal diameter, which is an approximate value of the inner diameter (a nominal diameter is not equal to the outer diameter minus two times the wall thickness). The specifications of plain carbon steel wire bushings are expressed in terms of nominal diameter, which is an approximation of the outside diameter (the nominal diameter is not equal to the inside diameter plus twice the wall thickness). Obviously, the same size of welded steel pipe for low-pressure fluid transportation is thicker than ordinary carbon steel wire bushings. The nominal diameter of a cast iron pipe is an approximate value of the inner diameter. Nominal caliber is customarily used in inches to indicate that plastic tubing and various composite tubing specifications are expressed in nominal outside diameters, nominal outside diameters are generally equal to the minimum of the average outside diameter.