TABLE 4: Steam, Gas, or Air service w/ Pipe supported from above (in clevis or 2-bolt hanger) Pipe Size (inches) For reference: ASME B31.1 Pipe Shields Model: Clevis Hanger 2-Bolt Hanger A1000 A2000 A3000 A4000 A9000 D1000 D2000 D4000 D5000 D3000 D6000 D3100 D6100 D3200 D6100 D3300 D6300 maximum hanger support spacing (feet) 1/2 3/4 8 9 11 12 12 13 13 15 1 1 1/2 2 2 1/2 9 12 13 14 15 19 20 20 16 20 22 22 19 22 25 25 21 26 36 29 3 3 1/2 4 5 15 16 17 19 21 21 23 22 24 23 24 24 26 25 26 28 32 29 31 . . . 30 . . . 55 6 8 10 12 21 24 26 30 22 21 20 20 23 22 22 21 24 25 24 24 32 25 40 40 55 52 45 45 14 16 18 20 32 35 37 39 21 21 21 21 23 22 22 22 25 25 25 25 38 40 40 38 55 55 49 44 60 60 60 60 . . . 65 24 30 42 44 20 21 24 40 34 50 51 60 60 65 65