( KS D3576,JIS G3459,ASTM A312)
:  ȭ,, ,,¹ 
ȣĪ ܰ ȣĪβ SCH (mm)
5S 10S 20S 40S 80S
A B KS ASTM KS ASTM KS ASTM KS KS ASTM KS ASTM
8 1/4 13.8 13.72 1.2 - 1.65 1.65 2.0 2.2 2.24 - -
10 3/8 17.3 17.15 1.2 - 1.65 1.65 2.0 2.3 2.31 - -
15 1/2 21.7 21.34 1.65 1.65 2.1 2.11 2.5 2.8 2.77 - -
20 3/4 27.2 26.67 1.65 1.65 2.1 2.11 2.5 2.9 2.87 - -
25 1 34.0 33.40 1.65 1.65 2.8 2.77 3.0 3.4 3.38 - -
32 11/4 42.7 42.16 1.65 1.65 2.8 2.77 3.0 3.6 3.56 4.9 4.85
40 11/2 48.6 48.26 1.65 1.65 2.8 2.77 3.0 3.7 3.68 5.1 5.08
50 2 60.5 60.33 1.65 1.65 2.8 2.77 3.5 3.9 3.91 5.5 5.54
65 21/2 76.3 73.03 2.1 3.11 3.0 3.05 3.5 5.2 5.16 - -
80 3 89.1 88.90 2.1 2.11 3.0 3.05 4.0 5.5 5.49 - -
90 31/2 101.6 101.60 2.1 2.11 3.0 3.05 4.0 5.7 5.74 - -
100 4 114.3 114.30 2.1 2.11 3.0 3.05 4.0 6.0 6.02 - -
125 5 139.8 141.30 2.8 2.77 3.4 3.40 5.0 6.6 6.55 - -
150 6 165.2 168.28 2.8 2.77 3.4 3.40 5.0 7.0 7.11 - -
200 8 216.3 219.08 2.8 2.77 4.0 3.76 6.5 8.2 8.18 - -
250 10 267.4 273.05 3.4 3.40 4.0 4.19 6.5 - - - -
300 12 318.5 323.85 4.0 3.96 4.5 4.57 6.5 - - - -
350 14 355.6 355.6 4.0 3.96 5.0 4.78 - - - - -
400 16 406.4 406.4 4.5 4.19 5.0 4.78 - - - - --

KS D3576(JIS G3459) ASTM A312
ܰ D<30 0.3     10.29? D 48.6       +0.40  -0.80
D30 1%     48.26 < D 114.3      0.80
    114.3 < D 219.08   +1.60  -0.80
    219.08 < D 406.4   +2.40  -0.80
β t<2 2%   ġ - 12.05%
t 10%
   ̻   ġ + 6.4 MM
   ǿ ƾ   ǿ  ƾ