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      Steel Pipe Sizes and Schedules

      All the piping used by CRP is dimensionally to ASME B36.1 /API 5L
      The nominal bore is loosely related to the i/d of the pipe, there are different wall thicknesses or schedules available for each size, the o/d stays constant for each NB, the heavier the schedule of pipe the smaller the bore.
      Download in pdf

      Inches

      NB

      DN

      OD (inches)

      Pipe Schedule

      SCH 5

      SCH 10

      SCH
      20

      SCH 30

      SCH 40

      SCH 60

      SCH 80

      SCH 100

      SCH 120

      SCH 160

      3/4"

      20

      1.05

      0.065

      0.11

      x

      0.095

      0.113

      x

      x

      0.17

      x

      0.219

      1"

      25

        1.315

      0.065 

       0.11

        x

       0.114

       0.133

      x

       x

       0.2

      x

       0.25

      1.1/2"

      40

       1.9

      0.065

       0.11

      x

      0.125

      0.145

      x

      x

       0.225

      x

       0.281

      2"

      50

       2.375

      0.065

       0.12

       x

        x

      0.154

        x

      x

      0.25

       x

       0.344

      2.1/2"

      65

        2.875

      0.083

       0.12

      x

        x

      0.203

        x

       x

       0.3

      x

      0.375

      3"

      80

        3.5

      0.083

       0.12

       x

        x

      0.216

       x

       x

        0.35

      x

      0.438 

      4"

      100

        4.5

      0.083

       0.12

        x

        x

      0.237 

      x

       x

       0.437

      x

       0.531

      5"

      125

       5.563

      0.109 

      0.12 

        x

        x

      0.258 

      x

        x

      0.5

      x

       0.625

      6"

      150

      6.625

      0.109

       0.13

        x

      x

      0.28 

       x

       x

      0.562 

      x

       0.719

      8"

      200

        8.625

      0.109 

      0.15

      0.25

       0.277

       0.322

      0.406

      0.593

      0.718 

      0.812 

      0.906

      10"

      250

       10.75

      0.134

      0.17

      0.25

      0.307 

       0.365

      0.5

      0.718

       0.843

      1.0

      1.125 

      12"

      300

      12.75

      0.165

      0.18

      0.25

      0.33

      0.406

      0.5

      0.843

      1.0

      1.125

      1.312





































      mm

      NB

      DN

      OD (mm)

      Pipe Schedule

      SCH 5

      SCH 10

      SCH
      20

      SCH 30

      SCH 40

      SCH 60

      SCH 80

      SCH 100

      SCH 120

      SCH 160

      3/4"

      20

      26.67 

       1.65

      2.11 

      x

      2.41 

       2.87

      x

       3.91

      x

      4.32 

      5.56 

      1"

      25

       33.40

       1.65

       2.77

      x

       2.90

       3.38

      x

       4.55

      x

       5.08

       6.35

      1.1/2"

      40

       48.26

       1.65

       2.77

      x

       3.18

       3.68

      x

       5.08

      x

       5.72

       7.14

      2"

      50

       60.32

       1.65

       2.77

      x

      x

       3.91

      x

       5.54

      x

       6.35

       8.74

      2.1/2"

      65

       73.02

       2.11

       3.05

      x

      x

       5.16

      x

       7.01

      x

       7.62

       9.53

      3"

      80

       88.9

       2.11

       3.05

      x

      x

       5.49

      x

       7.62

      x

       8.89

       11.13

      4"

      100

       114.3

       2.11

       3.05

      x

      x

       6.02

      x

       8.56

      x

       11.10

       13.49

      5"

      125

       141.3

       5.77

       3.4

      x

      x

       6.55

      x

       9.53

      x

       12.70

       15.88

      6"

      150

       168.27

       2.77

       3.4

      x

      x

       7.11

      x

       10.97

      x

       14.27

      18.26 

      8"

      200

       219.07

       2.77

       3.76

       6.35

      7.04 

      8.18 

       12.7

       12.70

       15.06

       18.24

       23.01

      10"

      250

       273.05

       3.4

       4.19

       6.35

       7.8

       9.27

       12.7

      15.06 

       18.24

       21.41

       28.58

      12"

      300

      323.85

      4.19

      4.57

      6.35

      8.38

      10.31

      12.7

      17.45

      21.41

      25.40

       33.32






































      Contact Details

      Corrosion Resistant Products Ltd
      Todmorden Road
      Littleborough
      OL15 9EG

      Phone: +44(0)1706 756400
      Fax: +44(0)1706 379567
      Email:

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