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SECTION I ♦ Telescoping* Pipe System <br />TABLE 3.1.1 Sizing for Telescoping Pipe Systems <br />Product Secondary Cont. Secondary Cont. Telescoping <br />Pipe Size Pipe Size Pipe Size Reducer Size <br />A B C D <br />(in.) (mm) (in.) (min) (in.) (mm) (in.) (mm) <br />2 50 3 75 4 100 4 x 3 100 x 75 <br />3 75 4 100 5 125 5 x 4 125 x 100 <br />4 100 5 125 6 150 6 x 5 150 x 125 <br />TABLE 3.1.2 Determining Length of Containment Pipe <br />Product X X X <br />Pipe Size Coupling, 45 Termination <br />A 90" Elbow, Tee Elbow Fitting <br />(in.) (mm) (in.) (mm) (in.) (mm) (in.) (mm) <br />2 50 <br />2'1A <br />54 <br />1.X <br />48 <br />41 <br />121 <br />3 75 <br />1 <br />48 <br />2Y <br />57 <br />4% <br />121 <br />4 100 <br />1 <br />48 <br />2111 <br />54 <br />6 <br />152 <br />• <br />s <br />C = (A - X1 - X2) - 2 B = (C=2) - 1" (25 mm) <br />Where: X1 = Fitting #1 <br />X2 = Fitting #2 <br />Note: This equation is based on the use of concentric re- <br />ducers in the system. If eccentric reducers are used, substi- <br />tute 2" (50 mm) for 1" (25 mm) in the B equation. <br />Example: For 2" (50 mm) product piping; <br />if A = 20'4" (6198 mm) OAL (overall length) <br />And X1 = 2%" (54 mm) (90' elbow from Table 3.1.2) <br />And X2 = 1%" (48 mm) (45° elbow from Table 3.1.2) <br />Then = (20'4"-2%"-1h")-2=10' <br />(6198 mm -54 mm-48mm) _2=3048 min <br />And = (10=2)-1"=4'11" <br />(3048 mm = 2) - 25 mm = 1499 mm <br />Cut pieces: <br />C = center section <br />= 10' of 4" pipe (3048 mm of 100 mm pipe) <br />B = end sections <br />= 4'11" of 3" pipe (1499 mm of 75 mm pipe) <br />FIGURE 3.1.1 <br />WARNING: Since every insertion of the primary piping <br />may vary, dry fit all secondary containment connections <br />to make sure that the insertion is approximately 3". Be <br />sure that the containment pipe is not inserted too far into <br />the containment fitting. The glossy O.D. of the pipe <br />should not be seated in the containment fitting. <br />NOTE: Currently, 2", 3", 4", and 5" pipe; 4" x 3" and 5" x 4" telescoping con- <br />centric reducers, and 4" x 3" telescoping eccentric reducers can be supplied with <br />a UL Label. <br />32 installation Instructions <br />C <br />B <br />B <br />A' <br />D <br />A <br />D <br />FIGURE 3.1.1 <br />WARNING: Since every insertion of the primary piping <br />may vary, dry fit all secondary containment connections <br />to make sure that the insertion is approximately 3". Be <br />sure that the containment pipe is not inserted too far into <br />the containment fitting. The glossy O.D. of the pipe <br />should not be seated in the containment fitting. <br />NOTE: Currently, 2", 3", 4", and 5" pipe; 4" x 3" and 5" x 4" telescoping con- <br />centric reducers, and 4" x 3" telescoping eccentric reducers can be supplied with <br />a UL Label. <br />32 installation Instructions <br />