Document 9J699KKYjNxj72KqMjyEX91Qq

676 . CHAPTER 26 1957 Guide Table 9. Dimensions of Flanged Cast-Iron Elbows, Double Branch Elbows, Tees, Crosses, Laterals, True Y's (Straight Sizes), and Reducers (Class 125) Pipe, Fittings, Welding 677 tight joints, a gasket is usually inserted between the contact faces of the flanges. The flange bolts then draw the faces up so tight that the gasket deforms into the face imperfections and thereby provides a tight joint. Gaskets are made of numerous materials, such as cork, paper, fiber, asbestos, metal (iron, steel, copper, etc.), and combinations of metal and some soft material. The proper gasket material to use depends upon the service of the pipe. The material should not be detrimentally affected by the chemical and thermal conditions of the fluid being carried. Table 10. Dimensions of Steel Butt-Welding Fittings Nom- INAL. Pipe Size Inside Diam op Fit-. TINGS Center to Face Elbow Tees, True Y and Double Bbanch Elbow A Centeb to Face 00 Deo Long Radius Elbow B Elbow C CbnFace Shobt Center to Face True Y AND Lateral Face Face Diam NESS Wall op Trice- Flange Flange NESS DE F (Min) 11 mm 1H 1*4 22 2 m 33 3*4 3*4 44 6. 5 66 8 10 12 14 OD 16 OD 8 10 12 14 16 18 OD 18 20 OD 20 24 OD 24 30 OD -30 36 OD 36 42 OD 42 48 OD 48 3*4 3 *4 4 4*4 5 5*4 6 6*4 7*4 8 9 11 12 14 15 16 *4 18 22 25 28* 31* 34* 5 5*4 m6 7 7*4 8*4 9 10*4 11*4 14 16*4 10 21*4 24 26*4 29 34 41*4 49 56*4 64 1*4 5*4 2 6*4 2*4 7 2*4 8 3 9*4 3 10 3*4 11*4 4 12 4 13*4 5 14*4 5*4 17*4 6*4 20*4 7*4 24*4 7*4 27 8 30 8*4 32 9*4 35 11 40*4 15 49 18 21 24 1*4 1*4 2 2*4 2*4 3 3 m3 3H 5 5*4 6 6*4 7 8 9 10 i 5 5*4 6 6*4 7 8 9 11' 12 14 16 18 19 20 24 30 36 42 48 4*4 4*4 5 6 7 mm 9 10 11 13*4 16 19 21 23*4 25 27*4 32 38*4 46 53 59*4 Me *4 Me 54 Mo *Mo *Me i*4e 1 m IMe 1*4 m IMe IMe l*<e m 2H 2 2H ni Mo Me Me Me Me M Me H *4 M w H, !M* *4 l lMo 1*4 1*4 lM* 1*4 lMe 2 From American Standard for Caat Iron Pipe Flanges and Flanged Fittings, Class 125, ASA BIS.l-lMSAll dimensions given are in inches. * Does not apply to true Y's or double-flanged elbows. higher pressures. They include: male and female face (an insert type face), tongue-and-groove (an adaptation of the male and female type), lapped pipe to flange, lapped pipe to pipe, and ring and groove using neck flanges. As it is too expensive to machine flange faces sufficiently to provide water VALVES are made with ^ same end connections as fittings. A brief escnption of each type follows. flanMade ln siz.es from H in- up. Used whenever line fittings are tionu wuen la"rgferes9izueesnat rreemusoevda. l is contemplated. Flanged valves facilitate installa- Els:conW^ Most common type end. Can be used for all pressures. Usually 10 smaller size because of difficulty in making large screwed joints. ture-Lu!?"9 Available in steel only. Generally employed for high tempera- mgh pressure work. Difficult to disassemble in a welded line. This type in-