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    Flange Ratings

    Uploaded by

    Victor Nair

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Flange Ratings

    Uploaded by

    Victor Nair
    12 views10 pages

    Original Title

    Flange ratings

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    © © All Rights Reserved

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    DOCX, PDF, TXT or read online from Scribd

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    Copyright:

    © All Rights Reserved
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    Download as docx, pdf, or txt
    12 views10 pages

    Flange Ratings

    Uploaded by

    Victor Nair

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 10

    Working Pressure Bar (psi)

    Temperature Class
    °C
    150 300 400 600 900 1500 2500
    (°F)
    -29 - 38 19.6 51.1 68.1 102.1 153.2 255.3 425.5
    (-20.2 - 100) (284) (741) (987) (1480) (2220) (3700) (6167)
    50 19.2 50.1 66.8 100.2 150.4 250.6 417.7
    (122) (278) (723) (968) (1452) (2180) (3632) (6054)
    100 17.7 46.6 62.1 93.2 139.8 233.0 388.3
    (212) (257) (675) (900) (1351) (2026) (3377) (5628)
    150 15.8 45.1 60.1 90.2 135.2 225.4 375.6
    (302) (229) (654) (871) (1307) (1959) (3267) (5443)
    200 13.8 43.8 58.4 87.6 131.4 219.0 365.0
    (392) (200) (635) (846) (1270) (1904) (3174) (5290)
    250 12.1 41.9 55.9 83.9 125.8 209.7 349.5
    (482) (175) (607) (810) (1216) (1823) (3039) (5065)
    300 10.2 39.8 53.1 79.6 119.5 199.1 331.8
    (572) (148) (577) (770) (1154) (1732) (2886) (4809)
    325 9.3 38.7 51.6 77.4 116.1 193.6 322.6
    (617) (135) (561) (748) (1122) (1683) (2806) (4675)
    350 8.4 37.6 50.1 75.1 112.7 187.8 313.0
    (662) (122) (545) (726) (1088) (1633) (2722) (4536)
    375 7.4 36.4 48.5 72.7 109.1 181.8 303.1
    (707) (107) (528) (703) (1054) (1581) (2635) (4393)
    400 6.5 34.7 46.3 69.4 104.2 173.6 289.3
    (752) (94.2) (503) (671) (1006) (1510) (2516) (4193)
    425 5.5 28.8 38.4 57.5 86.3 143.8 239.7
    (797) (79.7) (417) (557) (833) (1251) (2084) (3474)
    450 4.6 23.0 30.7 46.0 69.0 115.0 191.7
    (842) (66.7) (333) (445) (667) (1000) (1667) (2778)
    475 3.7 17.4 23.2 34.9 52.3 87.2 145.3
    (887) (53.6) (252) (336) (506) (758) (1264) (2106
    A pressure class table taken from ASME B16.5 is shown below; the table is for

    carbon steel flanges. For ease of use, the table has been modified to show imperial
    and metric units.
    ANSI FLANGE ASTM A182 Gr. F316, 316L
    The flange rating table shows the maximum pressure for flanges of classes
    150/300/400/600/900/1500/2500 at increasing temperatures (Celsius or Fahrenheit) – in PSI

    ANSI/ASME ANSI PRESSURE RATING


    B16.34

    Temperature °F 150# 300# 400# 600# 900# 1500# 2500#

    -20 to 100 275 720 960 1440 2160 3600 6000

    200 235 620 825 1240 1860 3095 5160

    300 215 560 745 1120 1680 2795 4660

    400 195 515 685 1025 1540 2570 4280

    500 170 480 635 955 1435 2390 3980

    600 140 450 600 900 1355 2255 3760

    650 125 445 590 890 1330 2220 3700

    700 110 430 580 870 1305 2170 3620

    750 95 425 570 855 1280 2135 3560


    800 80 420 565 845 1265 2110 3520

    850 65 420 555 835 1255 2090 3480

    900 50 415 555 830 1245 2075 3460

    950 35 385 515 775 1160 1930 3220

    1000 20 350 465 700 1050 1750 2915

    1050 20 345 460 685 1030 1720 2865

    1100 20 305 405 610 915 1525 2545

    1150 20 235 315 475 710 1185 1970

    1200 20 185 245 370 555 925 1545

    1250 20 145 195 295 440 735 1230

    1300 20 115 155 235 350 585 970

    1350 20 95 130 190 290 480 800

    1400 20 75 100 150 225 380 630

    1450 20 60 80 115 175 290 485

    1500 20 40 55 85 125 205 345


    API Material Classification
    Sep 26, 2017 | Reference Tables

    A-7
    Casing AUS

    Internal Parts AUS

    Shaft AUS

    Impeller AUS

    A-8
    Casing 316 AUS

    Internal Parts 316 AUS

    Shaft 316 AUS

    Impeller 316 AUS

    C-6
    Casing 12% CR

    Internal Parts 12% CR

    Shaft 12% CR

    Impeller 12% CR
    D-1
    Casing Duplex

    Internal Parts Duplex

    Shaft Duplex

    Impeller Duplex

    D-2
    Casing Superduplex

    Internal Parts Superduplex

    Shaft Superduplex

    Impeller Superduplex

    I-1
    Casing Cast Iron

    Internal Parts Cast Iron

    Shaft Carbon Steel

    Impeller Cast Iron

    I-2
    Casing Cast Iron
    Internal Parts Bronze

    Shaft Carbon Steel

    Impeller Bronze

    S-1
    Casing Carbon Steel

    Internal Parts Cast Iron

    Shaft Carbon Steel

    Impeller Cast Iron

    S-3
    Casing Carbon Steel

    Internal Parts Ni-Resist

    Shaft Carbon Steel

    Impeller Ni-Resist

    S-4
    Casing Carbon Steel

    Internal Parts Cast Iron

    Shaft Carbon Steel


    Impeller Carbon Steel

    S-5
    Casing Carbon Steel

    Internal Parts Carbon Steel

    Shaft AISI 4140

    Impeller Carbon Steel

    S-6
    Casing Carbon Steel

    Internal Parts 12% Cr

    Shaft AISI 4140

    Impeller 12% Cr

    S-8
    Casing Carbon Steel

    Internal Parts 316 AUS

    Shaft 316 AUS

    Impeller 316 AUS


    S-9
    Casing Carbon Steel

    Internal Parts Ni-Cu Alloy

    Shaft Ni-Cu Alloy

    Impeller Ni-Cu Alloy

    Tolerances on Linear Dimensions


    The tolerance on center to center dimension, face-to-face dimension, center-to-face
    dimension and location of attachments shall be maintained within ±1/8" or ±3 mm
    maximum.
    Tolerances on Bends
    As per para. 332.2.2 of ASME B31.3. flattening of bends, measured as the difference
    between the largest and the smallest outside diameter at any cross section, shall not
    exceed 8% of the nominal diameter of the pipe for internal pressure. Flattening of
    bends at weld ends shall not exceed 3% of the nominal pipe diameter for external
    pressure. Removal of metal shall not be used to achieve these requirements. PFI
    Standard ES-24 provides guidelines on the ovality if the same are not defined in the
    governing code.

    Tolerances on pipe spools for field adjustment


    Where a field fit-up is required, it is recommended that one spool piece shall have a
    plain end 100-150 mm (4-6 inches) longer than the dimension indicated on the
    piping drawing for adjustment at site. The installation contractor is required to
    verify the dimension the dimensions in the field before trimming and beveling the
    spool provided with cutting allowance. The fabrication contractor makes a provision
    in the material take off for these overlengths (cutting allowance). The adjacent spool
    piece is prepared with beveled end in the shop and need not have any overlengths
    for field adjustment.

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