Document GKeMjeKkxNKyZV6mx8MkqMLwv

624: CHAPTER 27 1955 Guide - . Table 6. Pipe Fittings Elbows 90, 60,45 &22} Standard 90 & 45 Street 90 & 45" Female union 90 & 45 Butt-welding 90 & 45 Flanged 90 Side outlet 90 side Outlet rolling Base , 90 & 45 Male union '90 & 45 SocketTwelding 90" Roiling - Drop Tees ''Standard Flanged Female union Flanged base Railing - Service Flanged side outlet Female union outlet Butt-welding Side outlet.railing Four-way . Male union Flanged reducing Socket-welding Drop Couplings Wrought Cast Socket-welding ; Crosses Screwed : Flanged ` Butt-welding Y-Bends 45 Screwed 45 Flanged 45 Double screwed True flanged Return Bends Butt-welding ' Back outlet Screwed Union end Reducers Standard Butt-welding Eccentric Socket-welding Flanged taper Eccentric butt welding Flanged eccentric Bushings Outside hexagon Eccentric Face Caps Standard Socket-welding Butt-welding Plugs Countersunk Square head Bar Nipples Close Long Tank ; 1 Unions Female Male & female Flange Tongue & groove flange Flanges Blind . Floor Screwed Slip-on Welding neck Reducing fitting to be used is determined by the pressure of the fluid being carried; or by the use of the pipe fine. The materials generally used.hre steel, cast iron, malleable iron (heat treated cast iron), copper, brass, stainless steel, alloy steely or bronzeJ The material used also depends upon the pressure or characteristics of the fluid. ` Fittings.are designated and sized in accordance with American Standards Association specifications and are identified by their nominal pipe sizes. In the case of reducing tees, crosses, and Y-branches (laterals), the size of the largest run opening is given first, followed by the size of the opening at the opposite end of the run. Where the fitting is a tee or Y-branch (lateral), the size of the outlet is given last. Where the fitting is a cross, the largest.-side-outlet opening is the third dimension given followed by Pipe, Fittings, Welding i- F\ 4x3x2 TEE 4x4x2. T-BRANCH r 4x3*2 Y-BRANCH 625 4 4*4x22 CROSS 4 443*2 CROSS 4 4*3*2*|x CROSS Fig. 1. Description op Tees and Laterals (ASA B16.3--1951) the opening opposite. The straight line sketches, Fig. 1, illustrate how the reducing fittings are designated. Where an external thread is wanted the word male follows the size of that opening. Allowable.pressures for solder type fittings are given in Table 7. Allow able pressures for ferrous screwed, flanged, and welding fittings are covered in the following .45.4 specifications: Type op Fitting Specification . Saturated Steam Pressure frig Cast Iron--Flanged.............. Cast Iron--Flanged............................. Cast Iron--Flanged............................. Cast Iron--Flanged (refrigeration).' Cast Iron--Screwed............................. Malleable Iron--Screwed................... Malleable Iron--Screwed. ................. Brass or Bronze--Screwed................. Brass or Bronze--Screwed................. Steel--Flanged . .......... .......... B16.1 B16b B16bl B16.16 B16.4 B16.3 B16.19 B16.15 B16.17 B16.5 125 250 800 300 125 and 150 150 300 125 250 2500: for Pressure may reduce with increasing sizes. saturated steam. Higher pressures may be This pressure is the maximum allowed allowed with lower temperatures. in thia specification Steel welding (butt or socket type) fittings may be used for the same pressure as the pipe, providing wall thickness (or schedule number), and / also the material, are the same as the pipe on which they are used. Screwed fittings include: couplings, elbows (45 or 90), return bends (close and open), tees, crosses, laterals (Y-branches), plugs, caps, lock buts, flanges, bushings, and reducing fittings (elbows, tees and couplings), deducing fittings and bushings may be eccentrically tapped to permit drainage of condensate. Sometimes nipples are erroneously called fittings. Actually a nipple is a piece of pipe less than 12 in. long that has been threaded on both ends, rt.pe 12 in. or longer is regarded as cut .pipe. Nipples are classified, as