Turkish customers who purchased our CNC pipe threading lathe were unable to achieve their requirements for thread repairing functions because they chose the Fanuc 5 package CNC system. Therefore, it is considered to replace the system again, which brings great work inconvenience to the customer. The processing of various threads is completely dependent on CNC machine tools, and the choice of CNC system is also particularly important.
How many kinds of threads are there?
NPT is the abbreviation of National (American) Pipe Thread , which belongs to the American standard 60 -degree tapered pipe thread and is used in North America. National standards can be found in the national standard GB/T12716-1991.
PT is the abbreviation of Pipe Thread . It is a 55-degree sealed tapered pipe thread. It belongs to the Wyeth thread family and is mostly used in Europe and the Commonwealth of Nations. Commonly used in water and gas pipe industry, the taper is specified as 1:16. National standards can be found in GB/T7306-2000.
G is a 55-degree non-thread sealing pipe thread, which belongs to the Wyeth thread family. The mark G represents cylindrical thread. National standards can be found in GB/T7307-2001.
In addition, the 1/4, 1/2, 1/8 marks in the thread refer to the diameter of the thread size, and the unit is inch. Insiders usually use points to refer to the thread size, one inch equals 8 points, 1/4 inch equals 2 points, and so on. G is the general name of pipe thread (Guan). The division of 55 and 60 degrees is functional, commonly known as pipe circle. That is, the thread is processed by a cylindrical surface.
ZG is commonly known as pipe cone, that is, the thread is processed by a conical surface. The general water pipe joints are like this. The national standard is marked as Rc metric thread to express with the pitch, and the American and British thread is expressed by the number of threads per inch. It is the biggest difference between them. Metric thread is 60 degree equilateral profile, British thread is isosceles 55 degree profile, and American thread is 60 degrees.
Metric units are used for metric threads, and imperial units are used for US and British threads.
Post time: Nov-19-2021