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  • DIN 2440 Medium-weight threaded steel tubes.

    DIN 2440  STEEL TUBES MEDIUM WEIGHT SUITABLE FOR SCREWING

    1. SCOPE

    This Standard applies to medium-weight tubes suitable for screwing. They are suitable for nominal pressure 2 for liquids and nominal pressure 10 for air nd non-hazardous gases.

    2. Other relevant Standards

    DIN 2444 Zinc coatings on steel tubes; quality standard for the hot galvanizing of steel tubes for installation purposes

    DIN 2999 Part 1 Whitworth pipe threads for tubes and fittings; cylindrical internal thread and conical external

    DIN 17100 Steels for general structural purposes; quality specifications

    DIN 50136 Testing of metallic materials; flattenin test on tubes.

    3. Dimensions, designation

    Designation of a medium-weight tube suitable for screwing, nominal width 40, seamlesly gavenized(B), in manufacturing lengths:

    Table 1. Threaded tube DIN 2440 – DN 40-seamless B

    Nominall width
    Conn-
    ecting
    nomin-
    al width
    of the
    flttings
    according
    to DIN
    2950 and
    DIN 2980
    Whit-
    worth-
    pipe
    threads
    according
    to
    DIN
    2999
    Part1
    Tube
    Screw thread
    Corresponding
    socket according
    to DIN 2986
    Outside
    diameterd1
    Wall
    thick-
    nesss
    Weight
    Theo-
    retical
    screw
    thread
    diameter
    d2
    Threads
    per
    25.4mm
    Usable
    screw
    thread
    length
    J
    min
    at
    a
    max.
    Distance of
    screw thread
    dlameter
    d2
    from tube end
    Outside
    diameter
    Length
    Plain-end
    tube
    kg/m
    socketed
    tubekg/m
    a
    max.
    a
    min.
    min.
    min.
    6
    1/8
    R 1/8
    10.2
    2.0
    0.407
    0.410
    9.728
    28
    7.4
    4.9
    3.1
    14
    17
    8
    1/4
    R 1/4
    13.5
    2.35
    0.650
    0.654
    13.157
    19
    11.0
    7.3
    4.7
    15.4
    25
    10
    3/8
    R 3/8
    17.2
    2.65
    0.852
    0.858
    16.662
    19
    11.4
    7.7
    5.1
    21.3
    26
    15
    1/2
    R 1/2
    21.3
    2.65
    1.22
    1.23
    20.955
    14
    15.0
    10.0
    6.4
    26.4
    34
    20
    3/4
    R 3/5
    26.9
    2.65
    1.58
    1.59
    26.441
    14
    16.3
    11.3
    7.7
    31.8
    36
    25
    1
    R 1
    33.7
    3.25
    2.44
    2.46
    33.249
    11
    19.1
    12.7
    8.1
    39.5
    43
    32
    1 1/4
    R 1 1/4
    42.4
    3.25
    3.14
    3.17
    41.910
    11
    21.4
    15.0
    10.4
    48.3
    48
    40
    1 1/2
    R 1 1/2
    48.3
    3.25
    3.61
    3.64
    47.803
    11
    21.4
    15.0
    10.4
    54.5
    48
    50
    2
    R 2
    60.3
    3.65
    5.10
    5.17
    59.614
    11
    25.7
    18.2
    13.6
    66.3
    56
    65
    2 1/2
    R 2 1/2
    76.1
    3.65
    6.51
    6.63
    75.184
    11
    30.2
    21.0
    14.0
    82
    65
    80
    3
    R 3
    88.9
    4.05
    8.47
    8.64
    87.884
    11
    33.3
    241
    17.1
    95
    71
    100
    4
    R4
    114.3
    4.5
    12.1
    12.4
    113.030
    11
    39.3
    28.9
    21.9
    122
    83
    125
    5
    R 5
    139.7
    4.85
    16.2
    16.2
    138.430
    11
    43.6
    32.1
    25.1
    147
    92
    150
    6
    R 6
    165.1
    4.85
    19.2
    19.8
    163.830
    11
    43.6
    32.1
    25.1
    174
    92
    1) Referred to an average length of 6m

    Research use only,Commercial use is prohibited.