This tiny reference booklet easily slides into a pocket, toolbox, or billfold. Contains useful formulas; tables for finding pipe circumference, decimal equivalents, angles of turn, cut backs, lengths of set pieces; information about rolling offsets, 45 degree laterals, two piece eccentric reducers, 90 degree branches, American standard pipe threads, trigonometry, thermal expansion of pipe, welding fittings, and more.  This booklet provides basic information on some of the most commonly used and difficult fabricating problems. The explanations of the various fabricating problems have been written as briefly as possible.