Общий каталог Yamawa 2021 - страница 695

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17. Taps for Pipe Threads Intro American Pipe Thread Taps SP American standard pipe thread has various types. We show their symbols and engagement of threads as follows. Pair groups of external thread and internal thread. SL Standard Description Internal Thread Mating Thread External Thread Mating Thread American Standard Taper Pipe Thread for General Use NPT NPT NPT NPTNPSC PO American Standard Straight Pipe Thread in Pipe Couplings NPSC NPT - - Pipe Threads, American Standard Taper Pipe Threads for Railing Joints NPTR NPTR NPTR NPTR General Purpose ST American Standard Straight Pipe Thread for Free-Fitting Mechanical(ANSI/ASME B1.20.1)Joints for FixturesNPSMNPSMNPSM NPSM American Standard Straight Pipe Thread for Loose-Fitting MechanicalJoints with LocknutsNPSL NPSL NPSL NPSL ROLL American Standard Straight Pipe Threads for Loose-Fitting MechanicalJoints for Hose CouplingsNPSHNPSH NPSH NPSH Dryseal American Standard Taper Pipe Thread NPTF NPTFPTF-SAE-SHORTNPTF NPTF, NPSF, NPSIPTF-SAE-SHORT Dryseal Pipe Threads Dryseal SAE Short Taper Pipe ThreadCARBIDE PTF-SAE-SHORT NPTF PTF-SAE-SHORT NPTFNPSI (ANSI B1.20.3) Dryseal American Standard Fuel Internal Straight Pipe Thread NPSF NPTF - - Dryseal American Standard Intermediate Internal Straight Pipe Thread NPSI NPTFPTF-SAE-SHORT- - LONG Note: These symbols correspond to the name of American pipe thread. HAND These threads are(1)Thread angle is 60˚ TAPS (2) Taper of Taper Thread is 3/4” per foot. (3) Fundamental height of triangle : H=Height of triangle thread profile H=0.866025P (4) The difference between American Standard Pipe Thread for general use and Dryseal American Standard Pipe • Crests and roots truncation of thread is different. EG (STI) • The length of engagement for pipe thread is different by types. • With regard to standard, Dryseal American Standard Pipe Thread is available in right hand. In accordance with ANSI B 94.9, 4 types of pipe thread are specified in American Pipe Thread Standard. Please refer to next page about the relation between taps and threads and about thread tolerance. SPECIAL THREADS, GAUGES THREAD MILLS DIES CENTER DRILLS Technical info 696