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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 widthConn-
    ecting
    nomin-
    al width
    of the
    flttings
    according
    to DIN
    2950 and
    DIN 2980
    Whit-
    worth-
    pipe
    threads
    according
    to
    DIN
    2999
    Part1
    TubeScrew threadCorresponding
    socket according
    to DIN 2986
    Outside
    diameterd1
    Wall
    thick-
    nesss
    WeightTheo-
    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.
    61/8R 1/810.22.00.4070.4109.728287.44.93.11417
    81/4R 1/413.52.350.6500.65413.1571911.07.34.715.425
    103/8R 3/817.22.650.8520.85816.6621911.47.75.121.326
    151/2R 1/221.32.651.221.2320.9551415.010.06.426.434
    203/4R 3/526.92.651.581.5926.4411416.311.37.731.836
    251R 133.73.252.442.4633.2491119.112.78.139.543
    321 1/4R 1 1/442.43.253.143.1741.9101121.415.010.448.348
    401 1/2R 1 1/248.33.253.613.6447.8031121.415.010.454.548
    502R 260.33.655.105.1759.6141125.718.213.666.356
    652 1/2R 2 1/276.13.656.516.6375.1841130.221.014.08265
    803R 388.94.058.478.6487.8841133.324117.19571
    1004R4114.34.512.112.4113.0301139.328.921.912283
    1255R 5139.74.8516.216.2138.4301143.632.125.114792
    1506R 6165.14.8519.219.8163.8301143.632.125.117492
    1) Referred to an average length of 6m

    Research use only,Commercial use is prohibited.


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