Общий каталог Widia 2017 - страница 1797

Предыдущая страница Следующая страница

Навигация

Taper Pipe Tap Thread Limits • Ground Thread • Reference USCTI Table 338

American National Standard Taper Pipe Thread Form (NPT)

Aeronautical National Taper Pipe Thread Form (ANPT)

Dryseal American National Standard Taper Pipe Thread Form (NPTF)

Projection*

nominal size (in)threads per inchprojection (in)projection tolerance + / –taper per f minoot limits maxlength L1tap drill size NPT, ANPT, NFTF
1/1627.312.063.719.781.160C
1/827.312.063.719.781.1615Q
1/418.459.063.719.781.22787/16
3/818.454.063.719.781.2409/16
1/214.579.063.719.781.32045/64
3/414.565.063.719.781.33929/32
111-1/2.678.094.719.781.4001-9/64
1-1/411-1/2.686.094.719.781.4201-31/64
1-1/211-1/2.699.094.719.781.4201-23/32
211-1/2.667.094.719.781.4362-3/16
2-1/28.925.094.734.781.6822-39/64
38.925.094.734.781.7663-15/64
3-1/28.938.125.734.781.821—
48.950.125.734.781.844—

**Recommended size given permits direct tapping without reaming the hole, but only gives a full thread for approximately the L1 length. Reprinted with permission from United States Cutting Tool Institute (USCTI). Published by Kennametal Inc. © 2014. All rights reserved.

„ Pipe Taps

General-purpose pipe taps are appropriate for Short projection pipe taps are made with a threading a wide variety of materials, both ferrous projection shorter than standard for taper pipe and non-ferrous. tapping where the depth of tapping is limited. Standard

Ground thread pipe taps are standard inProjectionSpecial short projection taper pipe taps can
Shortest
American Standard Pipe Form (NPT) andProjectionbe furnished with American National Standard

American Standard Dryseal Pipe Form (NPFT). Taper Pipe thread (ANPT) or Dryseal American NPT threads require the use of a sealer, like National Standard Taper Pipe thread (NPTF, Teflon® tape or pipe compound. Dryseal taps are PTF-SAE Short, or PTF-SPL Extra Short). used to tap fittings, which will give a pressure-

For information on short projection pipe taps tight joint without the use of a sealer.

L1 Basic and hole preparation for NPT, NPTF, and ANPT

Ring Gage Size The nominal size of a pipe tap is that of the pipe internal pipe threads, consult WIDIA-GTD™ fitting to be tapped, not the actual size of the Technical Bulletins. tap. The thread tapers 3/4" per foot.

All pipe taps are furnished with 2-1/2–3-1/2 thread chamfer.