Minimum Bore Dimensions of Full Bore Valves

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Table below provides the minimum bore dimensions of full bore valves supplied as per API SPEC 6D

NPS DN Minimum Bore Dimensions for Full Bore Ball Valves
Class 150, 300
and 600		 Class 900 Class 1500 Class 2500
inch mm inch mm inch mm inch mm
½ 15 0.50 12.7 0.50 12.7 0.50 12.7 0.50 12.7
¾ 20 0.75 19.0 0.75 19.0 0.75 19.0 0.75 19.0
1 25 0.98 25.0 0.98 25.0 0.98 25.0 0.98 25.0
1¼ 32 1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8
1 ½ 40 1.50 38.0 1.50 38.0 1.50 38.0 1.50 38.0
2 50 1.93 49.0 1.93 49.0 1.93 49.0 1.65 42.0
2 ½ 65 2.44 62.0 2.44 62.0 2.44 62.0 2.05 52.0
3 80 2.91 74.0 2.91 74.0 2.91 74.0 2.44 62.0
4 100 3.94 100.0 3.94 100.0 3.94 100.0 3.42 87.0
6 150 5.91 150.0 5.91 150.0 5.67 144.0 5.16 131.0
8 200 7.91 201.0 7.91 201.0 7.55 192.0 7.04 179.0
10 250 9.92 252.0 9.92 252.0 9.41 239.0 8.78 223.0
12 300 11.93 303.0 11.93 303.0 11.30 287.0 10.43 265.0
14 350 13.15 334.0 12.67 322.0 12.40 315.0 11.50 292.0
16 400 15.16 385.0 14.69 373.0 14.17 360.0 13.11 333.0
18 450 17.16 436.0 16.65 423.0 15.98 406.0 14.72 374.0
20 500 19.17 487.0 18.54 471.0 17.87 454.0 16.50 419.0
22 550 21.18 538.0 20.55 522.0 19.69 500.0 - -
24 600 23.19 589.0 22.44 570.0 21.50 546.0 - -
26 650 24.92 633.0 24.29 617.0 23.38 594.0 - -
28 700 26.93 684.0 26.18 665.0 25.23 641.0 - -
30 750 28.94 735.0 28.03 712.0 27.00 686.0 - -
32 800 30.66 779.0 29.92 760.0 28.74 730.0 - -
34 850 32.68 830.0 31.81 808.0 30.50 775.0 - -
36 900 34.41 874.0 33.66 855.0 32.24 819.0 - -
38 950 36.42 925.0 35.59 904.0 - - - -
40 1000 38.43 976.0 37.63 955.8 - - - -
42 1050 40.16 1020.0 39.61 1006.0 - - - -
48 1200 45.90 1166.0 45.24 1149.0 - - - -
54 1350 51.65 1312.0 - - - - - -
56 1400 53.54 1360.0 - - - - - -
60 1500 57.40 1458.0 - - - - - -

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