Spheroidal graphite cast iron pipe and the process for producing

Details Spheroidal graphite cast iron pipe and the process for producing Spheroidal graphite cast iron pipe and the process for producing

1980-03-03

1982-03-30

Little, Willis

Pipes and tubular conduits

Combined

With end structure

138173, F16L 900

Patent

active

043219500

ABSTRACT:
The pipe has on its cylindrical wall (2) at least one corrugated circular projection (9) having the same thickness (e) as this wall. This circular projection has meridian section in the shape of an isosceles triangle having an obtuse apex angle (x) and a radiused apex (10). This triangle is connected to the cylindrical wall by wide portions (11) having a radius (R) which exceeds the radius (r) of the apex (10) and is a plurality of times greater than the thickness (e) of the wall (2).

REFERENCES:
patent: 1049542 (1913-01-01), Smith
patent: 1544057 (1925-06-01), Dimick
patent: 2012766 (1935-08-01), Meyer
patent: 3520163 (1970-07-01), Otoda
patent: 3578777 (1971-05-01), De Gain
patent: 4261671 (1981-04-01), Langer

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