Nipple to the casing pipe 168
To increase the service life of threaded joints of casing pipes used nipple. Because the nipple is subjected to significant loads it is made from seamless pipes of steel grade D, K, and with a greater wall thickness than the casing. On both ends of the nipple cut external trapezoidal dvokomorna threaded, length 60 mm.
The outer diameter -168 mm
The inner diameter -154 mm
Wall thickness 7 mm
Mark steel - 45
Thread 60/60
Length - 170 mm