During the work with pipes it is more convenient to consumers to operate with their length. Metallurgists keep account of the production in tons. Characteristics of devices and constructions at which production pipes are used, also depend more on the weight of the elements, than on their sizes. For this purpose it is necessary to be able to transfer one parameters of pipes to others – meters in kilograms and vice versa.It is required to you
- for steel carbonaceous pipes of round diameter – in state standard specifications 10704-91, 8732-78, 10704-91, 8734-75;
- for steel square pipes – in state standard specifications 12336-66, 8639-68, 25577-83, 30245-94, TU 36-2287-80;
- for steel rectangular pipes – in state standard specifications 8645-68, 25577-83, 30245-94;
- for pipes from aluminum and its alloys – in state standard specification 18482-79;
- for copper pipes – in state standard specification 617-90.
The abundance of state standard specifications is caused by that there are many types of the pipes differing with manufacturing techniques (goryache-and holodnodeformirovanny, sutural and seamless, welded and is not present). To learn pipe weight, it is enough to look at one any GOST as the mass of pipes does not depend on a way of their production.
P = (F1-F2) *100*p*1000,
P – the weight of one meter of a pipe, in kg;
F1-Square of section of a pipe taking into account an internal opening, in cm?;
F2 – the area of section of an internal opening of a pipe, in cm?;
p – density of material of which the pipe in g/cm is made?;
100 – number of centimeters in meter;
1000 – number of grams in kilogram.
For p steel equally 7,85 g/cm?, for aluminum and its alloys – 2,5-2,8 g/cm?, for copper and its alloys – 8,4-8,8 g/cm?.
F1 and F2 for pipes of round section are equal? *d?/4, where d – diameter of a pipe and an opening in cm? – 3,14.