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    Home>Operation Units>Structural Steel > API Line Pipes
    API Line Pipes / General Data (Per American Standard Designation, 1970)
    Seamless and Welded Steel Pipes

    Nom
    Size

    O.D. Schedule 20 Schedule 20 Schedule 30 Standard (P.E.) Schedule 40 Schedule 60 Extra Strong Schedule 80 Schedule 100 Schedule 120 Schedule 140 Schedule 160 XX Strong
    Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft Wall Lbs/Ft
    1/8
    1/4
    3/8
    1/2
    3/4
    0.405
    0.540
    0.657
    0.840
    1.050
                .068
    .088
    .091
    .109
    .113
    .24
    .42
    .57
    .85
    1.13
    .068
    .068
    .091
    .109
    .113
    .24
    .42
    .57
    .85
    1.13
        .095
    .119
    .126
    .147
    .154
    .31
    .54
    .74
    1.09
    1.47
    .095
    .119
    .126
    .147
    .154
    .31
    .54
    .74
    1.09
    1.47
               


    .188
    .219



    1.31
    1.94



    .294
    .308



    1.71
    2.44
    1
    1 1/4
    1 1/2
    1.315
    1.660
    1.900
                .133
    .140
    .145
    1.68
    2.27
    2.72
    .133
    .140
    .145
    1.68
    2.27
    2.72
        .179
    .191
    .200
    2.17
    3.00
    3.63
    .179
    .191
    .200
    2.17
    3.00
    3.63
                .250
    .250
    .281
    2.84
    3.76
    4.86
    .358
    .382
    .400
    3.66
    5.21
    6.41
    2
    2 1/2
    2.375
    2.875
                .154
    .203
    3.65
    5.79
    .154
    .203
    3.65
    5.79
        .218
    .276
    5.02
    7.66
    .218
    .276
    5.02
    7.66
                .344
    .375
    7.46
    10.01
    .436
    .552
    9.03
    13.69
    3
    3 1/2
    3.500
    4.000
                .216
    .226
    7.58
    9.11
    .216
    .266
    7.58
    9.11
        .300
    .318
    10.25
    12.50
    .300
    .318
    10.25
    12.50
                .438 14.32 .600
    .636
    18.58
    22.85
    4
    5
    6
    4.500
    5.563
    6.625
                .237
    .258
    .280
    10.79
    14.62
    18.97
    .237
    .258
    .280
    10.79
    14.62
    18.97
        .337
    .375
    .432
    14.98
    20.78
    28.57
    .337
    .375
    .432
    14.98
    20.78
    28.57
        .438
    .500
    .562
    19.00
    27.04
    36.39
        .531
    .625
    .719
    22.51
    32.96
    45.35
    .674
    .750
    .864
    27.54
    38.55
    53.16
    8 8.625     .250 22.36 .277 24.70 .322 28.55 .322 28.55 .406 35.64 .500 43.39 .500 43.39 .594 50.95 .719 60.71 .812 67.76 .906 74.69 .875 72.42
    10 10.750     .250 28.04 .307 34.24 .365 40.48 .365 40.48 .500 54.74 .500 54.74 .594 64.43 .719 77.03 .844 89.29 1.000 104.13 1.125 115.64 1.000 104.13
    12 12.750     .250 33.38 .330 43.77 .375 49.56 .406 53.52 .562 73.15 .500 65.42 .688 88.63 .844 107.32 1.000 125.49 1.125 139.67 1.312 160.27 1.000 125.49
    14
    16
    18
    14.000
    16.000
    18.000
    .250
    .250
    .250
    36.71
    42.05
    47.39
    .312
    .312
    .312
    45.61
    52.27
    58.94
    .375
    .375
    .438
    54.57
    62.58
    82.15
    .375
    .375
    .375
    54.57
    62.58
    82.15
    .438
    .500
    .562
    63.44
    62.58
    70.59
    .594
    .656
    .750
    85.05
    107.50
    138.17
    .500
    .500
    .500
    72.09
    82.77
    93.45
    .750
    .844
    .938
    106.13
    136.61
    170.92
    .938
    1.031
    1.156
    130.85
    164.82
    207.96
    1.094
    1.219
    1.375
    150.79
    192.43
    244.14
    1.250
    1.438
    1.562
    170.21
    223.64
    274.22
    1.406
    1.594
    1.781
    189.11
    245.25
    308.55
       
    20
    22
    24
    26
    28
    24.000
    22.000
    24.000
    26.000
    28.000
    .250
    .250
    .250
    .312
    .312
    52.73
    58.07
    63.41
    85.60
    92.41
    .375
    .375
    .375
    .500
    .500
    78.60
    86.61
    94.62
    136.17
    146.85
    .500
    .500
    .562

    .625
    104.13
    114.81
    140.68

    182.73
    .375
    .375
    .375
    .375
    .375
    78.60
    86.61
    94.62
    102.63
    110.64
    .594

    .688


    123.11

    171.29


    .812
    .875
    .969


    166.40
    197.41
    238.35


    .500
    .500
    .500
    .500
    .500
    104.13
    114.81
    125.49
    136.17
    146.83
    1.031
    1.125
    1.219


    208.87
    250.81
    296.53


    1.281
    1.375
    1.531


    256.19
    302.88
    367.45


    1.500
    1.625
    1.812


    296.37
    353.61
    429.50


    1.750
    1.875
    2.062


    341.10
    403.01
    483.24


    1.969
    2.125
    2.344


    379.14
    451.07
    542.09


       
    30
    32
    34
    36
    30.000
    32.000
    34.000
    36.000
    .312
    .312
    .312
    .312
    98.93
    105.59
    112.25
    118.92
    .500
    .500
    .500
    .500
    157.53
    168.21
    178.89
    189.57
    .625
    .625
    .625
    .625
    196.08
    209.43
    222.73
    236.13
    .375
    .375
    .375
    .375
    118.65
    126.66
    134.67
    142.68

    .688
    .688
    .750

    229.92
    244.77
    282.35
        .500
    .500
    .500
    .500
    157.53
    168.21
    178.89
    189.57
                           

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