Fig. [643] represents a male and female flange joint metal to metal combined with and forming a part of the pipe; it is used for special work and conditions. Fig. [644] is the usual screwed sleeve threaded connection with right hand coupling. Fig. [645] is a much used male and female flange union screwed for the reception of standard wrought iron pipe. Fig. [646] illustrates the common threaded malleable iron union and Fig. [647] the plain light malleable iron tee.
Note.—Attention of the reader is directed to that part of the Glossary in the opening pages of Part One which relates to pipe and fittings as being closely related to this division of the work and which may be considered as an introduction to what is now added.
Fig. 655.
Fig. 656.
Fig. 657.
Steam Pipe Lines. These are constructed of cast iron or wrought iron and used for conveying a supply of steam from the boilers to engines, pumps, turbines and other machines driven by steam. Usually these lines are built up with straight pipe and “fittings.” The names of the latter are as follows: elbows; forty-fives (45°); tees; plugs; caps; reducers (or bushings); nipples; valves; unions (with ground, perishable, and flange joints); couplings (reducing and right and left); crosses; special fittings, such as elbows and tees of a nominal size reduced at some point to a smaller size to avoid the use of reducers; angle, check, and gate valves, and plug cocks; lock-nuts.