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Possible configurations for a telescoping pipe system are shown in Figure 3.1.1 and Table 3.1.1. <br />The length of the containment pipe is determined from these formulas and the constants "X" in Table 3.1.2. Refer to Figure <br />3.1.2. <br />F =(E-X1_x2) <br />2 <br />G =( � / - 1" (25mm) <br />where:: X1 = fitting 91 <br />X2 = fitting #2 <br />Note: This equation is based on the use of concentric reducers in the system. If eccentric reducers are used, substitute 2"(50 <br />mm) for 1 "(25mm) in the G equation. <br />TABLE 3.1.2 <br />DETERMINING LENGTH OF CONTAINMENT PIPE <br />Product <br />(X) <br />Fittings <br />(X) <br />Fittings <br />(X) <br />Fittings <br />Pipe Size <br />90° elbow <br />Coupling <br />Termination <br />Tee <br />45° <br />elbow <br />Fitting <br />(in.) (trim) <br />(in.) <br />(mm) <br />(in.) <br />(mm) <br />(in.) <br />(mm) <br />2 50 <br />2-1/8 <br />54 <br />1-7/8 <br />48 <br />4-3/4 <br />121 <br />3 75 <br />1-7/8 <br />48 <br />2-1/4 <br />57 <br />4-3/4 <br />121 <br />4 100 ; <br />1-7/8 <br />4$ <br />2-1 /8 <br />54 <br />6 <br />152 <br />11 <br />Example: For 2" (50mm) product piping; <br />If E = 20'4" (6,198mm) <br />And X1 = 2-1/8" (54mm) (900 ell from Table 3.1.2) <br />And X2 = 1-7/8" (48mm) (45° ell from Table 3.1.2) <br />Then F = (20'4" - 2-1/8" - 1 7/8") _ 2 = 10' <br />(6,198mm - 54mm -48mm) _ 2 = 3,048mm <br />And =00= 2)-1 =4'11" <br />(3,048mm _ 2) - 25mm = 1,499mm <br />Cut pieces: F = center section = 10' of 4" pipe (3,048mm of 1 00m pipe) <br />G = end sections = 4'11" of 3" pipe (1,499mm or 75mm pipe) <br />WARNING: Since every insertion of the primary piping may vary, dry fit all secondary containment connections to make <br />sure that the insertion is approximately 3". Be sure that the containment pipe is not inserted too far into the containment <br />fitting. The glossy O.D. of the pipe should not seated in the containment fitting. <br />�7 <br />40 <br />