What are the national standards for pipe connections (R (PT)) with tapered tubes at both ends? Thank you
Because of this transition joints, because of doing too much, but do not know what the standard, and many times is an industry or business standards it? Normally, this is called a pair of silk. Relatively simple production, large dosage.
A spiral shaped continuous raised part having a specified cross section on the surface of a cylinder or cone. According to its parent thread shape is divided into cylindrical and conical screw threads; according to their position in the matrix is divided into outer and inner thread, according to the section shape (teeth) divided into triangular thread, rectangular screw, trapezoidal thread, serrated thread and other special shape screw.
60 degrees taper pipe thread: NPT3/4 "55 degrees taper pipe thread: external thread -R3/4", internal thread -Rc3/4"
