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How to take the length of NPT thread in the actual machining

2022-10-09 Page view : 6 views

NPT generally take the length of the thread in the actual machining
For NPT THREADS, THE EFFECTIVE THREAD LENGTH is described as follows: THE MINIMUM EFFECTIVE THREAD LENGTH FOR American GENERAL SEALED CONICAL EXTERNAL THREADS SHALL not be less than the sum of the actual size of the reference distance and the assembly allowance.
We are NPT threads manufacturer.
Therefore, “the NPT 1/2 manual gives L3+L1=8.128+5.443=13.571”, when machining the thread, the length is not less than 13.571, can be. The length can be extended by 3 to 5mm “at your disposal”. Because it is a taper thread, the thread after “lengthening” is often not the shape of the “complete” thread, no use sense, but to be able to assemble the “insurance” role.
For your reference.
Refer to 《the Standard Manual for Metric, American and British Threads》