What is a pipe thread?

Pipe thread is on the wall for connecting thread, there are 55 degrees of sealing pipe thread sealing pipe thread and 55 degrees. Mainly used for pipe connection, make its internal and external thread cooperate closely, which has two kinds of straight tube and cone tube. Common pipe thread mainly include the following: the NPT, PT, G, etc. 1) The NPT is National ( 美国) The abbreviation of Pipe Thread, belongs to the American standard of 60 degree taper Pipe threads, used in North America, national standard refer to GB/T12716 - 1991. 2) PT ( BSPT) Is a Pipe Thread, is 55 degrees tapered Pipe Thread sealing, belong to wyeth Thread family, for Europe and the commonwealth countries, often used in water and gas Pipe industry, taper 1:16, national standard refer to GB/T7306 - 2000. Domestic to mid-december. 。 3) G is 55 degrees of pipe thread sealing and whitworth thread family. Marked as G on behalf of the straight thread. National standard refer to GB/T7307 - 2001.