Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 131
Fig. 262 114 ESSENTIALS OF DRAFTING The representations of Figs. 280 and 281 are often used whenmaking piping layouts. Standard Pipe. — Wrought pipe is known by its nominal insidediameter. In the United States the Briggs Standard is in generaluse. The nominal diameter differs from the actual… … Complete fhreods 69 .075 Fig. PQ3 used for pressures up to 125 pounds per square inch. Extrastrong and double extra strong pipe are made for use at higherpressures. The extra thickness is obtained by reducing the in-side diameter, the outside diameter remaining constant for agiven nominal diameter.…
Mechanical drawing
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