Round steel pipe size chart
Generally speaking, in Australia, the diameter of round steel pipe can be divided into outer diameter, inner diameter and nominal diameter. The outer diameter of a round pipe whose pipe material is a seamless steel pipe is represented by the parent D, and the size and wall thickness of the outer diameter are added thereafter. For example, for a seamless steel pipe with an outer diameter of 108, the wall thickness is 5MM, represented by D108*5, plastic round pipes are also represented by outer diameter, such as De63, others such as reinforced concrete pipes, cast iron pipes, galvanized steel pipes, etc. are represented by DN, which are generally represented by nominal diameters in design drawings. It is a standard artificially stipulated for the convenience of design, manufacture and maintenance, and it is the specification name of pipes (or pipe fittings). The nominal diameter of the round steel pipe is not equal to its inner diameter and outer diameter. For example, there are several types of seamless round steel pipes with a nominal diameter of 100MM such as 102*5. 108*5, 108 is the outer diameter of the round steel pipe, and 5 means the steel pipe the wall thickness. Therefore, the inner diameter of the steel pipe is (108*5-5) = 98MM, but it is not exactly equal to the difference between the outer diameter of the steel pipe minus twice the wall thickness. It can also be said that the nominal diameter is close to the inner diameter, but not equal to one part of the inner diameter. The specification name of the pipe diameter, the nominal diameter is used in the design drawings. The purpose is to determine the structural dimensions and connection dimensions of round pipes, pipe fittings, valves, flanges, gaskets, etc. according to the nominal diameter. The nominal diameter is represented by the symbol DN. If the outer diameter is used in the design drawings, a pipe specification comparison table should also be made to indicate the nominal diameter and wall thickness of a certain pipe.
Hot rolled seamless round steel pipe size chart
In Australia, the hot rolled seamless round steel pipe size chart is as follows:
No. | Specification | Wall thickness（mm） | Theoretical weight per meter（kg） | Usual length | Remark | |
Nominal diameter | Outer diameter(mm) | |||||
1 | DN40 | 43 | 3 | 2.89 | 9 meters/a pipe or 10 meters/a pipe | |
2 | DN50 | 57 | 3 | 4 | ||
3 | 60 | 3 | 4.22 | |||
4 | DN65 | 73 | 3.5 | 6 | ||
5 | 76 | 3.5 | 6.26 | |||
6 | DN80 | 89 | 3.5 | 7.38 | ||
7 | DN100 | 108 | 4 | 10.26 | ||
8 | DN125 | 133 | 4 | 12.73 | ||
9 | ND150 | 159 | 4.5 | 17.15 | ||
10 | ND200 | 219 | 6 | 31.52 | ||
11 | DN250 | 273 | 7 | 45.92 | ||
12 | DN300 | 325 | 8 | 62.54 | ||
Welded round steel pipe (for low pressure fluid) size chart
In Australia, there are about 11 sizes of welded round steel pipe (for low pressure fluid), and the specific size chart is as follows:
No. | Specification | Wall thickness（mm） | Theoretical weight per meter（kg） | Usual length | Remark | |
Nominal diameter | Outer diameter(mm) | |||||
1 | DN15 ( 1/2") | 21.3 | 2.75 | 1.26 | 6meters/a pipe | The numbers in the brackets indicate the inch diameter |
2 | DN20(3/4 ") | 26.8 | 2.75 | 1.63 | ||
3 | DN25(1 ") | 33.5 | 3.25 | 2.42 | ||
4 | DN32(1-1/4 ") | 42.3 | 3.25 | 3.13 | ||
5 | DN40(1-1/2 ") | 48 | 3.5 | 3.84 | ||
6 | DN50(2 ") | 60 | 3.5 | 4.88 | ||
7 | DN65(2-1/2 ") | 75.5 | 3.75 | 6.64 | ||
8 | DN80(3 ") | 88.5 | 4 | 8.34 | ||
9 | DN100(4 ") | 114 | 4 | 10.85 | ||
10 | DN125(5 ") | 140 | 4.5 | 15.04 | ||
11 | DN150(6 ") | 165 | 4.5 | 17.81 | ||
Seamless round steel pipe
In Australia, there are about 4 sizes of seamless round steel pipe. The specific size chart is as follows:
Nominal diameter DN/mm | Outer diameter D*wall thickness ( mm*mm ) | Weight per unit length kg/m |
DN65 | 76*4 | 7.10 |
DN80 | 89*4 | 8.38 |
DN100 | 108*4 | 10.26 |
DN125 | 133*4.5 | 14.26 |
Spiral welded round steel pipe
In Australia, there are about 6 sizes of spiral welded round steel pipe, and the specific size chart is as follows:
Nominal diameter DN/mm | Outer diameter D*wall thickness ( mm*mm ) | Weight per unit length kg/m |
DN200 | 219*6 | 31.52 |
DN250 | 273*6 | 39.51 |
DN300 | 325*6 | 47.20 |
DN350 | 377*6 | 54.90 |
DN400 | 426*6 | 62.15 |
DN450 | 478*6 | 69.84 |
*For the size description of the round steel pipe, the first number refers to the outer diameter, and the round steel pipe with the outer diameter of 219 is DN200 (nominal
diameter) of round steel pipes; the second number generally refers to the wall thickness. 10mm wall thickness is sch60; 8 is round steel pipe length. The inner diameter of the heat shrinkable tube is 2mm and the standard is 3.0+0.2mm, which is suitable for the outer diameter of the packaged object. 1.1-1.8mm. $3mm inner diameter 3.5+0.2mm is suitable for the outer diameter of the packaged object 1.6-2.7mm.
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