Class 300 Flange Dimensions, ANSI B16.5 Class 300 LB Flanges

Class 300 Flange Dimensions

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Specification Of Class 300 Flanges :

Size: 1/2" (DN15) ~ 60" (DN1500)

Pressure: Class 300

Type: Weld Neck, Threaded, Slip-On, Socket Weld, Lap Joint, Blind, Orifice Flange, Orifice Plate and Restriction Orifice Plate, Spectacle Blind, Spacer, Blanks

Face Type: Flat Face (FF), Raise Face (RF), Ring Joint (RJT)

Coating: Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized

Dimension:  ANSI/ASME B16.5, ANSI/ASME B16.47 Series A (MSS SP-44), ANSI/ASME B16.47 Series B (API 605),
ANSI/ASME B16.36, ANSI/ASME B16.48 (API 590)


Class 300 LB Flange Dimensions In mm


Bolt And Stud Dimensions Chart - ASME B16.5 Flanges

300 LB. Flanges
# Bolts or Studs Dia of Bolts or Studs Length of Stud
1/16 RF
4 0.50 2-1/2
4 0.63 3
4 0.63 3
4 0.63 3-1/4
4 0.75 3-1/2
8 0.63 3-1/2
8 0.75 4
8 0.75 4-1/4
8 0.75 4-1/4
8 0.75 4-1/2
8 0.75 4-3/4
12 0.75 4-3/4
12 0.88 5-1/2
16 1.00 6-1/4
16 1.13 6-3/4
20 1.13 7
20 1.25 7-1/2
24 1.25 7-3/4
24 1.25 8
24 1.50 9

Class 300 Flange Pressure Rating

Rating Of Carbon Steel Flanges

Rating In “PSI”

The Table Shows The Maximum Pressure In PSI ASTM A105 / ASTM A350 LF2 / ASTM A350 LF3 / ASTM A350 LF6

Temperature (in F°) 300#
< 100 740
200 680
300 655
400 635
500 605
600 570
650 550
700 530
750 505
800 410
850 320
900 230
950 135
1000 85
Hydrostatic Test Pressure (psig) 1125

RATING IN BARS

TEMP C° 300#
   -29 / 38 51.1
50 50.1
100 46.6
150 45.1
200 43.8
250 41.9
300 39.8
325 38.7
350 37.6
375 36.4
400 34.7
425 28.8
450 23
475 17.4
500 11.8
538 5.9

RATING OF STAINLESS STEEL FLANGES

Flanges Pressure Rating in Bars ANSI flanges (ASTM A182 F304L / ASTM A182 F316L)

TEMP C° 300#
-29 TO 38 41.4
50 40
100 34.8
150 31.4
200 29.2
250 27.5
300 26.1
325 25.5
350 25.1
375 24.8
400 24.3
425 23.9
450 23.4

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