Ansul INERGEN - Page 81

Maximum Pipe Pressure Chart
PIPE PRESSURE (Continued)
Schedule 80 Threaded Pipe – Maximum Pressure (psi)
Grade Grade Grade Grade Grade
A-106C* A-53B, A-106B A-53B A-53A, A-106A A-53A
Diameter (Seamless) (Seamless) (ERW) (Seamless) (ERW)
in.
SE 21000 SE 18000 SE 15360
SE 14400 12240
0.25 5833 5000 4267 4000 3400
0.38 5102 4373 3732 3499 2974
0.5 4493 3851 3286 3080 2618
0.75 3874 3320 2833 2657 2258
1.0 3495 2996 2556 2397 2037
1.25 3073 2634 2248 2107 1792
1.5 2883 2472 2110 1978 1681
2.0 2625 2250 1920 1800 1530
2.5 2571 2204 1882 1764 1499
3.0 2400 2057 1756 1645 1399
4.0 2212 1896 1618 1517 1289
5.0 2076 1780 1518 1423 1210
6.0 2105 1804 1540 1442 1226
8.0 1948 1669 1424 1336 1135
For welded pipe or roll grooved pipe (fitting restricts pressure capability for roll grooved pipe):
Schedule 40 Welded – Maximum Pressure (psi)
Grade Grade Grade Grade Grade
A-106C* A-53B, A-106B A-53B A-53A, A-106A A-53A
Diameter (Seamless) (Seamless) (ERW) (Seamless) (ERW)
in.
SE 21000 SE 18000 SE 15360 SE 14400 12240
0.25 6844 5867 5006 4693 3989
0.38 5662 4853 4142 3883 3300
0.5 5450 4672 3986 3737 3176
0.75 4520 3875 3306 3100 2634
1.0 4248 3641 3107 2912 2475
1.25 3542 3036 2591 2429 2064
1.50 3205 2747 2344 2197 1868
2.0 2723 2334 1992 1867 1588
2.5 2965 2542 2168 2033 1728
3.0 2592 2221 1896 1777 1511
4.0 2212 1896 1618 1516 1289
5.0 1948 1669 1424 1336 1135
6.0 1775 1522 1298 1217 1034
8.0 1568 1344 1147 1075 914
Schedule 80 Welded – Maximum Pressure (psi)
Grade Grade Grade Grade Grade
A-106C* A-53B, A-106B A-53B A-53A, A-106A A-53A
Diameter (Seamless) (Seamless) (ERW) (Seamless) (ERW)
in.
SE 21000 SE 18000 SE 15360 SE 14400 12240
0.25 9256 7933 6770 6347 5395
0.38 7840 6720 5734 5376 4570
0.5 7350 6300 5376 5040 4284
0.75 6160 5280 4506 4224 3590
* This grade pipe may be difficult and expensive to get. Consult pipe supplier before accepting flow calculation maximum down stream pressure results.
SECTION V
UL EX-4510 12-1-01 Page 5-24