NPTF Training.ppt

N.P.T.F Dry Seal Training2006 DRYSEAL AMERICAN NATION EXTERNAL TAPER PIPE THREADS (N.P.T.F.) Note: An American National External pipe thread (N.P.T.F) uses a ? “ (in.) per foot taper. The blank for external threads should have a 1 Minute and 47 Degree taper as seen in the diagram below. DRYSEAL 33/64”-27 THREAD EXTERNALTAPER PIPE THREADS (N.P.T.F) Note: A 33/64 - 27 external pipe thread uses a 1 “ (in.) per foot taper. The blank for external threads should have a 2 Minute and 23 Degree taper as seen in the diagram above. GAGING METHOD AND TOLERANCES FOR EXTERNAL AMERICAN NATIONAL TAPER PIPE THREADS IMPORTANT – Thin (L1) ring and full (L2) ring gages must be used for proper threads. Note: Threads should be visible when max turns are reached during gauging. Gauge should not “Bottom out” DRYSEAL AMERICAN NATION EXTERNAL TAPER PIPE THREADS (N.P.T.F.) GAGING METHOD AND TOLERANCES 33/64-27 PIPE THREADS IMPORTANT – Thin (L1) ring and full (L2) ring gages must be used for proper threads. Note: Threads should be visible when max turns are reached during gauging. Gauge should not “Bottom out” PART GAGED AS FOLLOWS Thick Ring Gage: 7.6 Max. Turns Engagement 6.1 Min. Turns Engagement Thin Ring Gage: 5.4 Max. Turns Engagement 3.9 Min. Turns Engagement DRYSEAL AMERICAN NATIONAL INTERNAL TAPER PIPE THREADS (N.P.T.F.) GAUGING METHOD AND TOLERANCES AMERICAN NATIONAL INTERNAL TAPER PIPE THREADS IMPORTANT: Thin (L1) Plug Full (L3) Plug Gages must be used for proper threads. Note: Additional threads should be available when max turns are reached during gauging. Gauge should not “Bottom out” DRYSEAL 33/64-27 TAPER PIPE THREADS (N.P.T.F.) DRYSEAL AMERICAN NATION INTERNAL TAPER PIPE THREADS (N.P.T.F.) DRYSEAL AMERICAN NATION INTERNAL TAPER PIPE THREADS (N.P.T.F.)