DIN cutting ring fitting and 74° cone seal transition joint, each has its own advantages. One is the German DIN standard and the other is the American JIC standard.
DIN standard
DIN cutting ring fitting is also known as 24° taper joint is divided into many kinds. For example, male stud coupling, straight coupling, reducing fitting, and so on.
24° cone sealing is easy to install, sealing, many domestic industrial and mining enterprises are using 24° cone sealing form of sleeve joint in small and medium diameter pipeline laying, 24° cone sealing joint is widely used, because of its low requirements for installation personnel, not easy to leak; And the 24° cone joint uses hard tube forming technology to solve the problem of easy pulling out of the jacket; Greatly improve the reliability, but with steel pipe connection sleeve is mainly dependent on imports.
JIC standard
JJIC transition joint is also known as 74° cone seal joint or 37° cone seal joint. The flaring joint in the hydraulic pipe fittings standard issued by the Ministry of Machinery in China is modified according to this standard.
The JIC joint made in the United States adopts the form of metal seal, which has high processing requirements. If the tightening torque is not well controlled, it is easy to leak oil, but the metal seal is resistant to high pressure. And the pipeline is not easy to fall off, but the difficulty of the whole flaring is more common in aviation standards, high safety factor, can withstand high temperature.
