Patent ID: 6045162
Filing Date: 2000-04-04
Classification: F02M,F16L,Y10S

Abstract:
A joint head for a high-pressure metal piping, made of a thick steel tube having a passage with an internal diameter (d.sub.0), an external diameter (D.sub.0) and a radial thickness (t), said joint head including a radially enlarged end portion having an outside diameter (D.sub.1) larger than external diameter (D.sub.0) of said piping, said enlarged end portion forming a tapered concave pressure seat diverging outwardly from the passage, said pressure seat having a maximum opening diameter (d.sub.1) selected such thatd.sub.0 +t.ltoreq.d.sub.1 .ltoreq.D.sub.0 +t,said enlarged end portion having an open end face with a radial width (w) about one-half as large as the radial thickness (t) of the piping.