What Are Standard Pipe Threads?

What Are Standard Pipe Threads?
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1 Answer

Answer :

Pipe threads are grouped in certain ranges such as 1/4” to 3/8” pipe threads have 19 T.P.I , ½ “ to 7/ 8” pipe threads have 14 T.P.I, 1” and above size pipe threads have 11 T.P.I . Pipe threads may be either straight or tapered.
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A screw jack has 4 threads per inch. The mean radius of the thread is 2.338 inches. The mean diameter of the bearing surface under the cap is 3.25 inches. What is the turning moment required to raise the bload of 150 kg ( a.5.61 kg-inch b.50.6 kg-inch c.107 dynes d.30.3 kg-inch e.23.6 kg-inch

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Standard coarse threads are equally strong in failure by shear and failure by tension, if the height of nut is (A) h = 0.4 d (B) h = 0.6 d (C) h = 0.5 d (D) h = d

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