GMG Catalog

Effective Gasket Seating WidthBasic Gasket Seating Width, B 0Flange and Gasket Column 1 Column 2Diagram (Solid flat metal and (Spiral wound, metalring joint gaskets) jacketed, corrugated metal,grooved metal gaskets)1a1b*N2.N2.1c1d*W ≤ NW ≤ NW+T2, W+NW+T[ 4 max.],2W+N[ 4 max.]2W ≤ N 2W+N4W+3N83W ≤ N 2N4.3N8...4*3N8...7N16.5*N4.3N8...6W8.N =W =T =Width of gasketWidth of contact area(raised face or serrations)Thickness of gasketH G = Gasket load reaction forceG = Diameter of gasket load reaction forceh G = Distance from G to bolt circle diameterB 0 = Basic seating width of gasketB 1 = Effective seating width of gasketB 1 = B 0 if B 0 ≤ 1/4";B 1 = (√B 0 )/ 2 if B 0 > 1/4"* Where serrations do not exceed 1/64" depth and 1/32" spacing,choose 1b or 1d.26For B 0 > 1/4" For B 0 ≤ 1/4"