Carbon steel pipe cap

The circular (ring) carbon steel pipe cap stress and meridional stress at various points on the shell (axial) are changing, the vertex equals the hoop stress and axial stress, and stress on the equator.Carbon steel pipe cap under uniform internal pressure, axial stress of constant for the tensile stress (positive), an by a maximum point toward the equator gradually decreased to the minimum; hoop stress at the head transition zone will begin to appear compressive stress, continue to increase, if the length of axis ratio head transition zone on the edge of the compressive stress value will increase rapidly, the head is shallow, the higher the compressive stress values on the edge of the head, so will head length ratio limit within 2.6 is more reasonable.

Carbon steel pipe cap on QiuGuanXing head design, should pay attention to the cylinder connected to the pipe cap thickness should be not less than the thickness of the head, or should be set up to strengthen the period of transition between head and cylinder connections.Cylinder should strengthen the thickness of the section and the top thick, length should not be less than, the purpose is the cutting edgestress.