Pup joint is a kind of fitting commonly used in industrial pipe connection . Com – mon have thread short joint , divide into double head outside silk , single head out – side silk , flat head outside silk a few kinds . There are also with the flange joint of the short joint . The nipple is divided into tubing nipple and casing stub . Tubing short is a section of tubing , and compared to tubing , only the length is different , the others have the same . The length is 0.25m,0.5m,1m,1.5m, etc ., which is used to assemble the casing string .
The company can produce J55,K55,N80,L80,P110 and other steel grade short joints of flat and external thickened oil bushing .
Technical features : high mechanical strength and good comprehensive perfor – mance . The screw thread is made of special numerical control machine , which has high precision and reliable operation.
