抄録
Though a number of investigations have hitherto been reported of the gaskets of several materials used in the machine parts to be tightened, i.e. piping, vessel etc., they are considered to be insufficient for design purposes. In this paper, therfore, the authors have studied experimentally the gasket factor for asbestos-joint sheet gasket under internal fluid pressure up to 20Kg/cm2, with water and machine oil for fluid. From the results, the authors found various factors influencing the gasket factor, and the following facts have been confirmed.
1) The relation between the gasket stresses and internal pressures is shown to be in a definite equation.
2) The gasket factors are shown to have constant value regardless of the kind of internal fluid or its pressure, or of the gasket size.
3) The gasket factor increases slightly proportionally with the thickness of gasket, but it is negligibly small.
4) The gasket factor decreases with the increment of the width of the gasket and it can be expressed by the following experimental formula;
m=sb-k
in which m is the gasket factor, b is the width of the gasket, and s and k are the factors dependent on the kind of internal fluid.
5) When the internal fluid is machine oil, the gasket factor is smaller than when it is water, by about 0.6.
