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.