ASME B16.5 Flanges

Typical FacingsFor Steel Pipe FlangesNominalPipeSizeRaised FaceLarge MaleLarge Tongue;also Pipe LapSmallMaleSmallTongueLargeFemale,LargeGrooveSmallFemaleSmallGrooveLargeTongueSmallTongueLargeGrooveSmallGrooveA B C D E F G H1/2 ★ 1.38 0.72 1.38 1.44 0.78 1.44 1.00 0.943/4 ★ 1.69 0.94 1.69 1.75 1.00 1.75 1.31 1.251 ★ 2.00 1.19 1.88 2.06 1.25 1.94 1.50 1.441 1 /4 ★ 2.50 1.50 2.25 2.56 1.56 2.31 1.88 1.811 1 /2 ★ 2.88 1.75 2.50 2.94 1.81 2.56 2.12 2.062 ★ 3.62 2.25 3.25 3.69 2.31 3.31 2.88 2.812 1 /2 4.12 2.69 3.75 4.19 2.75 3.81 3.38 3.313 ★ 5.00 3.31 4.62 5.06 3.38 4.69 4.25 4.193 1 /2 ★ 5.50 3.81 5.12 5.56 3.88 5.19 4.75 4.694 ★ 6.19 4.31 5.69 6.25 4.38 5.75 5.19 5.125 ★ 7.31 5.38 6.81 7.38 5.44 6.88 6.31 6.256 ★ 8.50 6.38 8.00 8.56 6.44 8.06 7.50 7.448 ★ 10.62 8.38 10.00 10.69 8.44 10.06 9.38 9.3110 12.75 10.50 12.00 12.81 10.56 12.06 11.25 11.1912 15.00 12.50 14.25 15.06 12.56 14.31 13.50 13.4414 16.25 13.75 15.50 16.31 13.81 15.56 14.75 14.6916 18.50 15.75 17.62 18.56 15.81 17.69 16.75 16.6918 21.00 17.75 20.12 21.06 17.81 20.19 19.25 19.1920 23.00 19.75 22.00 23.06 19.81 22.06 21.00 20.9424 27.25 23.75 26.25 27.31 23.81 26.31 25.25 25.19DIMENSIONS are shown in inches.1/16" RAISED FACE (Fig. 1) is standard for 150 and 300 lb. WeldingNeck, Slip-On, Screwed and Blind Flanges, and is included in theflange thickness.1/4" RAISED FACE (Fig. 1) is standard for 400 lb. and heavierWelding Neck, Slip-On, Screwed and Blind Flanges, and is notincluded in the flange thickness.Outside Dia. Inside Dia. Ring JointPitchDia.PDepthofGrooveLThese Dimensions Vary With TheFlange Pressure Rating.See Pages 82, 83, and 84.LAP JOINT flanges are commonly furnished without a raised face,the rolled lap on the pipe itself forming a raised contact surface (seeFig. 2).★ Large Female and Large Groove Class 150 in these sizes will befull faced to O.D. of flange.Revised 1-99 65