NPT,PT,G,RC螺纹的区别(国外英文资料).docVIP

NPT,PT,G,RC螺纹的区别(国外英文资料) NPT, PT, and G are pipe threads NPT National (American) Pipe Thread abbreviation, NPT is the American taper pipe thread, used for sealing. 60 degree taper pipe thread of the United States standard used in North America. National standards are available in GB/T12716-1991 PT is the abbreviation of Thread Pipe, is a 55 degree taper pipe thread sealing, belonging to the Whitworth family, for the European and Commonwealth countries. Commonly used in water and gas pipe industry, taper regulations of 1:16. national standard is available on the GB/T7306-2000 G is a 55 degree non thread sealing pipe thread, belonging to the family of Wyeth thread, marked G for cylinder threads. National standards refer to GB/T7307-2001 G is the pipe thread collectively (Guan), 55, 60 degrees division is functional, commonly known as tube round. The thread is machined from a cylindrical surface. ZG is a commonly known as cone, cone thread processing, pipe joint is generally labeled as such, GB Rc Metric threads are represented by pitch, and American and British threads are expressed in thread per inch. This is their greatest difference, Metric thread is 60 degrees equilateral tooth type, thread is isosceles tooth type thread 55 degrees, 60 degrees. Metric units for metric threads; British and American systems. Pipe thread is mainly used for pipe connection, the internal and external threads are closely matched with straight pipe and cone pipe two kinds. Nominal diameter refers to the diameter of the pipe to be connected. Obviously, the diameter of the thread is larger than the nominal diameter The key is your 1 inch steel pipe wall thickness, what is the steel pipe? An inch is 25.4mm, amount of seamless pipe diameter, volume diameter seam Seamless steel tubes are of metric size, which means outer diameter * wall thickness, in millimeters. Such as 159 x 7108 x 5 size mark at a glance, the size of the front marked diameter symbol can not hit. Water gas pipe is welded p