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  • DIN 2441-STEEL TUBES HEAVY WEIGHT FOR SUITABLE FOR SCREWING

    DIN 2441-78 STEEL TUBES HEAVY WEIGHT FOR 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
    2.65
    0.493
    0.496
    9.728
    28
    7.4
    4.9
    3.1
    14
    17
    8
    1/4
    R 1/4
    13.5
    2.9
    0.769
    0.713
    13.157
    19
    11.0
    7.3
    4.7
    18.5
    25
    10
    3/8
    R 3/8
    17.2
    2.9
    1.02
    1.03
    16.662
    19
    11.4
    7.7
    5.1
    21.3
    26
    15
    1/2
    R 1/2
    21.3
    3.25
    1.45
    1.46
    20.955
    14
    15.0
    10.0
    6.4
    26.4
    34
    20
    3/4
    R 3/5
    26.9
    3.25
    1.90
    1.91
    26.441
    14
    16.3
    11.3
    7.7
    31.8
    36
    25
    1
    R 1
    33.7
    4.05
    2.97
    2.99
    33.249
    11
    19.1
    12.7
    8.1
    39.5
    43
    32
    1 1/4
    R 1 1/4
    42.4
    4.05
    3.84
    3.87
    41.910
    11
    21.4
    15.0
    10.4
    48.3
    48
    40
    1 1/2
    R 1 1/2
    48.3
    4.05
    4.43
    4.47
    47.803
    11
    21.4
    15.0
    10.4
    54.5
    48
    50
    2
    R 2
    60.3
    4.5
    6.17
    6.24
    59.614
    11
    25.7
    18.2
    13.6
    66.3
    56
    65
    2 1/2
    R 2 1/2
    76.1
    4.5
    7.90
    8.02
    75.184
    11
    30.2
    21.0
    14.0
    82
    65
    80
    3
    R 3
    88.9
    4.85
    10.1
    10.3
    87.884
    11
    33.3
    241
    17.1
    95
    71
    100
    4
    R 4
    114.3
    5.4
    14.4
    14.7
    113.030
    11
    39.3
    28.9
    21.9
    122
    83
    125
    5
    R 5
    139.7
    5.4
    17.8
    18.3
    138.430
    11
    43.6
    32.1
    25.1
    147
    92
    150
    6
    R 6
    165.1
    5.4
    21.2
    21.8
    163.830
    11
    43.6
    32.1
    25.1
    174
    92
    1) Referred to an average length of 6m

    A decision with regard to the method of designation for fittings will be taken the time when the currently existing ISO Recommendations are converted to ISO Standard, due consideration being given to international practice regarding the designation of tubes suitable for screwing.

    Research use only,Commercial use is prohibited .