Page 3 - Flanges | AAP Industries

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FLANGES [4]
Temperature / Pressure Ratings ASTM A105
CARBON STEEL PIPE FLANGES TO ANSI B16.5 (BS.1560)
FORGINGS TO ASTM A105 — Not recommended for prolonged use above 427°C FORGINGS TO ASTM A350-LF2 — Not to be
used above 343°C”
“TEMPERA-
TURE
IN °C”
MAXIMUM WORKING PRESSURE IN kPa BY PN (Pressure Numbers)
PN20 PN50 PN100 PN150 PN250 PN420
CLASS 150 CLASS 300 CLASS 600 CLASS 900 CLASS 1500 CLASS 2500
-29 to 38 1960 5110 10210 15320 25530 42550
50 1920 5010 10020 15020 25040 41730
100 1770 4640 9280 13910 23190 38650
150 1580 4520 9050 13570 22610 37690
200 1400 4380 8760 13150 21910 36520
250 1210 4170 8340 12520 20860 34770
300 1020 3870 7750 11620 19370 32280
350 840 3700 7390 11090 18480 30800
375 740 3650 7290 10940 18230 30390
400 650 3450 6900 10350 17250 28750
425 560 2880 5750 8630 14380 23960
450 470 2000 4010 6010 10020 16690
475 370 1350 2710 4060 6770 11290
500 280 880 1760 2640 4400 7330
525 190 520 1040 1550 2590 4320
540 130 330 650 980 1630 2720
“FLANGES ABOVE DN 600 ARE NOT INCLUDED IN ANSI B16.5 STANDARD AND THE CLASS DESIGNATIONS IN THESE
LARGE DIAMETERS DO NOT IMPLY SPECIFIC TEMPERATURE/PRESSURE RATINGS”
CHEMICAL PROPERTIES
CARBON MANGANESE PHOSPHORUS SULFAR SILICON
.35% max .60 - 1.05% .040% max .050% max 0.35%
NOTE 1 — For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% manganese
above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.
MECHANICAL PROPERTIES
TENSILE STRENGTH
min, Mpa
YIELD STRENGTH
min , Mpa
ELONGATION IN
50mm, min%
REDUCTION OF AREA,
min %
HARDNESS, HB
max
485 250 22 30 187
c Determined by either the 0.2% off-set method or the 0.5% extension-under-load method.