Αποτελέσματα Αναζήτησης
The Jargon, calculations, and charts that define NPT threads are very different compared with standard metric and inch threads. This webpage will explain the difference between the various series, how each parameter is defined, and show how to find the correct basic dimensions and tolerances for each thread.
NPT Thread Calculator for NPT thread dimensions according to ANSI/ASME B1.20.1 standard. - For left hand threads, include LH to the designation. (Example: 1/4 - 18 NPT - LH) - For pressure-tight joints, it is intended that taper pipe threads be made up wrench-tight with a sealant.
NPT Thread Chart Tap Drill Size Calculator for recommended drill and tapped hole sizes according to ASME B1.20.1 "Pipe Threads, General Purpose (Inch)" standard. The drill size shown by the calculator is the diameter of the standard drill which is the closest to the minimum minor diameters of the pipe thread.
National Standard Taper Pipe Threads Size NPT Chart - Includes both External and internal Pipe Thread Data. The taper rate for all NPT threads is 1⁄16 (3⁄4 inch per foot) measured by the change of diameter (of the pipe thread) over distance.
*Ream the hole before tapping with a reamer having a taper of 3/4 inch per foot. Pipe Size is the accepted industry designation and does not refer to either the inside or the outside diameter (ID or OD) of a pipe or a fitting.
NPT Thread Chart for basic dimensions of general purpose NPT pipe threads (inch) according to ANSI/ASME B1.20.1 standard. Thd. Note: The dimensions of the NPT Thread are given to four or five decimal places.
Tap Drill Charts | National Pipe Threads NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1/8 27 0.332 (Q) 27 0.348 (S) 1/4 18 7/16 18 29/64 3/8 18 9/16 18 19/32 1/2 14 45/64 14 47/64 3/4 14 29/32 14 15/16 1 11-1/2 1-9/64 11-1/2 1-3/16 1-1/4 11-1/2 1-31/64 11-1/2 1-33/64
