Общий каталог OSG 2018 - 2019 - страница 669

Straight Pipe Taps TABLE 335-STRAIGHT PIPE TAPS Angle Tolerance Ground Threads American National Standard Straight Pipe Thread Form Threads Per Inch Deviation in Half Angle (NPS) (NPSC) (NPSM) 8 ± 25' Thread Limits 11 1/2 to 27 Incl. ± 30' Formula for American National Standard Major Diameter Pitch Diameter Dryseal Pipe Form (NPS) NominalSizes(inch)ThreadsPer InchPlug atGagingNotchMin.GPlug atMax.GagingMin.HNotchKEMax.LThe maximum Pitch Diameter of tap is based upon an allowancededucted from the maximum product pitch diameter of NPSC or 1/8 27 0.3983 0.4022 0.4032 0.3736 0.3746 0.3751 NPSM, whichever is smaller. The minimum Pitch Diameter of tap is 1/4 18 0.5286 0.5347 0.5357 0.4916 0.4933 0.4938 derived by subtracting the ground thread pitch diameter tolerance 3/8 18 0.6640 0.6701 0.6711 0.6270 0.6287 0.6292 for actual equivalent size as shown in Table 331, page 433, Col. D. 1/2 14 0.8260 0.8347 0.8357 0.7784 0.7806 0.7811 3/4 14 1.0364 1.0447 1.0457 0.9889 0.9906 0.9916111-1/21.29661.30621.30771.23861.2402 1.24121-1/411-1/21.64131.65071.65221.58341.5847 1.5862Major DiameterMinor DiameterNominal Size(inch)Min.Max.GHMax. 1-1/2 11-1/2 1.8803 0.1890 1.8912 1.8223 1.8237 1.8252 1/8 H - 0.0010 K + A - 0.0010 M-B 2 11-1/2 2.3542 2.3639 2.3654 2.2963 2.2979 2.2994 1/4 to 3/4 Incl. H - 0.0010 K + A - 0.0020 M-B 2-1/2 8 2.8454 2.8604 2.8619 2.7622 2.7640 2.7660 1 to 4 Incl. H - 0.0015 K + A - 0.0021 M-B 3 8 3.4718 3.4868 3.4883 3.3885 3.3904 3.3924 3-1/2 8 3.9721 3.9872 3.9887 3.8888 3.8908 3.8928 Formula Values 4 8 4.4704 4.4855 4.4870 4.3871 4.3891 4.3911 LEAD TOLERANCEA maximum lead deviation of plus of minus .0005” within any two Threads PerInch A B270.02960.0257 MActual threads not farther apart than one inch is permitted. 18 0.0444 0.0401 Measured Note 14 0.0571 0.0525 Pitch Taps made to these specifications are marked NPS and used for 11-1/2 0.0696 0.0647 Diameter NPS, NPSC, and NPSM. 8 0.1000 0.0946 TABLE 335-A-STRAIGHT PIPE TAPS Formula for American National Standard Ground Thread Dryseal Pipe Form (NPSF) American National Standard Straight Dryseal Pipe Thread Form (NPSF) Major Diameter Pitch Diameter Thread Limits Nominal Max.SizeMin.Max.Min.Max.Minor (inch) G H K L Diam. Major Diameter Pitch Diameter NominalSize(inch)ThreadsPer InchMin.G Plug atMax.GagingMin.HNotchKMinor*Max.Diam.LFlat 1/6 H - 0.0010 K + Q - 0.0005 L - 0.0005 E-F M-Q1/8H - 0.0010K + Q - 0.0005L - 0.0005E-FM-Q1/4H - 0.0010K + Q - 0.0005L - 0.0005E-FM-Q E Max. 3/8 H - 0.0010 K + Q - 0.0005 L - 0.0005 E-F M-Q 1/16 27 0.3008 0.3018 0.2812 0.2772 0.2777 0.004 1/2 H - 0.0010 K + Q - 0.0005 L - 0.0005 E-F M-Q 1/8 27 0.3932 0.3942 0.3736 0.3696 0.3701 0.004 3/4 H - 0.0010 K + Q - 0.0005 L - 0.0005 E-F M-Q 1/4 18 0.5239 0.5249 0.4916 0.4859 0.4864 0.005 1 H - 0.0010 K + Q - 0.0001 L - 0.0010 E-F M-Q 3/8 18 0.6593 0.6603 0.6270 0.6213 0.6218 0.005 1/2 14 0.8230 0.8240 0.7784 0.7712 0.7717 0.005 Formula Values 3/4 14 1.0335 1.0345 0.9889 0.9817 0.9822 0.005 1 11-1/2 1.2933 1.2943 1.2386 1.2295 1.2305 0.006 Threads PerInch E F M Q *As specified or sharper.The major diameter of standard taper pipe plug gages and the minor diameter of27Pitch Diameter 0.0035 Actual 0.0251 standard taper pipe ring gages used for gaging dryseal threads will be truncated 18 of plug 0.0052 Measured 0.0395 .20p minimum to .25p maximum for all pitches. 14 at gaging 0.0067 Pitch 0.0533 11-1/2 notch 0.0081 Diameter 0.0649 Angle Tolerance LEAD TOLERANCE Threads Per Inch Deviation in Half Angles A maximum lead deviation of ±.0005” within any two threads not 11-1/2 to 27 Incl. ± 30' farther apart than one inch is permitted. WWW.OSGTOOL.COM Threading Technical 669