Pressure-Temp Rating ANSI Pipe-Flanges

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PRESSURE - TEMPERATURE RATINGSFOR STEEL PIPE FLANGES AND FLANGED FITTINGS

American National Standard ANSI BI6.5-1981

CLASS 1501p. 300 lb. '400 lb. 600 lb. 900 lb. .1500lb. 2500 lb.

HYDROSTATIC .- .....: TEST 450' 1125 1500 2225 3350 5575 9275PRESSURE. PSIG

TEMPERAnJRE, F MAXIMUM ALLOWABLE NON·SHOCK PRESSURE PSIG.

-20 to 100 285 . 740 .. 990 1480, 2220 3705 6170200 .260'. '675 ,: 900 1450. 2025 3375 562S300 230' 65? 875 1315 1970 3280 5470400 200 635 845 1270 1900 3170 5280

500 170 600 800 1200 1795 2995 4990600 140 550 730 1095 1640 2735 4560650 125 535 715 1075 1610 2685 4475700 110 535 710 1065 1600 2665 4440

750 95 505 670 1010 1510 2520 4200800 80 410 550 825 1235 2060 3430850 65 270 355 535 805 1340 2230900 50 170 230 345 515 860 1430

950 35 lOS 140 205 310 515 860

t1000 20 50 70 105 ISS 260 430

I Ratings apply to materials:

SA-I05 1•2 SA-515-702 SA-516-702 SA-181-701•2 SA-350-LF2SA-537-Cl.I3 SA-216-WCB2

NOTES:I. For service temperatures above 850 F it is recommended that killed steels

containing not less. than 0.100/0 residual silicon be used.2. Upon prolonged exposure to temperatures above 800 F, the carbide phase of

carbon steel may.be converted to graphite.3. The material shall not be used in thickness above 2VI in.

Flanges of ANSI B16.5 shall not be used for higher ratings except where it isjustified by the design methods of the Code.

Ratings are maximum allowable non-shock working pressures expressed as gagepressure, at the tabulated temperatures and may be interpolated betweentemperatures shown.

Temperatures are those on the inside of the pressure-containing shell of theflange. In general, it is the same as that of the contained material.

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