ASME B1.20.1:2013 pdf free download

ASME B1.20.1:2013 pdf free download
ASME B1.20.1:2013 pdf free download.Pipe Threads, General Purpose (Inch)
6.3 Loose-Fitting Mechanical Joints With Locknuts, NPSL
The American National Standard External Locknut Thread is designed to produce a pipe thread having the largest diameter that is possible to cut on standard pipe. Ordinarily, straight internal threads are used with these straight external threads, providing a loose fit. The dimensions ofthese threadsaregiveninTable 7. Itwillbe noted that the maximum major diameter of the external thread is slightly greater than the nominal outside diam- eter of the pipe. The normal manufacturer’s variation in pipe diameter provides for this increase. One applica- tion ofa taper pipe thread in combination with a locknut thread that has been in use for some time is that shown in Table 7. It consists of the nipple threaded joint used to connect standpipes with the floor or wall of a water supply tank.
6.4.4 Gage Dimensions. Gages used for NPSM shall be made to the pitch diameter limits specified in Table 6. Gages used for NPSL shallbe made to the pitch diameter limits specified in Table 7. These gages shall be made in accordance with standard practice for straight thread gages as outlined in ASME B1.2. The minimum major diameter of the GO thread plug gage or internal func- tional indicating gage shall be equal to the minimum pitch diameter of the internal thread plus an amount equal to 0.64951905P. The maximum major diameter of the NOT GO thread plug gage shall be equal to the maximum pitch diameter of the internal thread plus an amount equal to 0.43301270P. The maximum minor diameter of the GO thread ring gage or external func- tional diameter indicating gage shall be equal to the maximum pitch diameter of the external thread minus an amount equal to 0.43301300P. The minimum minor diameter of the NOT GO thread ring gage shall be equal to the minimum pitch diameter of the external thread minus an amount equal to 0.21650635P.