AS 1074 (NZS 1074) is an Australian (New Zealand) general-purpose steel pipe and fittings.
It applies to threaded steel pipes and fittings specified in AS 1722.1, and flat-ended steel pipes from DN 8 to DN 150.
Three wall thicknesses of steel pipe are also specified, light, medium, and heavy.
| Standard | P | S | CE |
| AS 1074 (NZS 1074) | 0.045% max | 0.045% max | 0.4 max |
CE is shorthand for carbon equivalent, which needs to be obtained by calculation.
CE = C + Mn/6
Minimum yield strength: 195 MPa;
Minimum tensile strength: 320 - 460 MPa;
Elongation: not less than 20%.
Each steel pipe should be tested by selecting one of the steel pipe tightness test methods.
Hydrostatic Test
The steel pipe maintains a water pressure value of 5 MPa for a sufficiently long period of time without leakage.
Non-Destructive Test
Eddy's current test is in accordance with AS 1074 Appendix B.
Ultrasonic testing in accordance with AS 1074 Appendix C.
Wall thickness grades: light, medium, and heavy.
The wall thickness grades of steel pipe vary and so do the corresponding outside diameter tolerances. Below is a table of the weights of these three grades of steel pipe and the corresponding OD tolerances.
Dimensions of steel tubes - Light
| Nominal size | Outside diameter mm |
Thickness mm |
Mass of black tube kg/m |
||
| min | max | Plain or screwed ends | Screwed and socketed | ||
| DN 8 | 13.2 | 13.6 | 1.8 | 0.515 | 0.519 |
| DN 10 | 16.7 | 17.1 | 1.8 | 0.67 | 0.676 |
| DN 15 | 21.0 | 21.4 | 2.0 | 0.947 | 0.956 |
| DN 20 | 26.4 | 26.9 | 2.3 | 1.38 | 1.39 |
| DN 25 | 33.2 | 33.8 | 2.6 | 1.98 | 2.00 |
| DN 32 | 41.9 | 42.5 | 2.6 | 2.54 | 2.57 |
| DN 40 | 47.8 | 48.4 | 2.9 | 3.23 | 3.27 |
| DN 50 | 59.6 | 60.2 | 2.9 | 4.08 | 4.15 |
| DN 65 | 75.2 | 76.0 | 3.2 | 5.71 | 5.83 |
| DN 80 | 87.9 | 88.7 | 3.2 | 6.72 | 6.89 |
| DN 100 | 113.0 | 113.9 | 3.6 | 9.75 | 10.0 |
Dimensions of steel tubes - Medium
| Nominal size | Outside diameter mm |
Thickness mm |
Mass of black tube kg/m |
||
| min | max | Plain or screwed ends | Screwed and socketed | ||
| DN 8 | 13.3 | 13.9 | 2.3 | 0.641 | 0.645 |
| DN 10 | 16.8 | 17.4 | 2.3 | 0.839 | 0.845 |
| DN 15 | 21.1 | 21.7 | 2.6 | 1.21 | 1.22 |
| DN 20 | 26.6 | 27.2 | 2.6 | 1.56 | 1.57 |
| DN 25 | 33.4 | 34.2 | 3.2 | 2.41 | 2.43 |
| DN 32 | 42.1 | 42.9 | 3.2 | 3.10 | 3.13 |
| DN 40 | 48.0 | 48.8 | 3.2 | 3.57 | 3.61 |
| DN 50 | 59.8 | 60.8 | 3.6 | 5.03 | 5.10 |
| DN 65 | 75.4 | 76.6 | 3.6 | 6.43 | 6.55 |
| DN 80 | 88.1 | 89.5 | 4.0 | 8.37 | 8.54 |
| DN 100 | 113.3 | 114.9 | 4.5 | 12.2 | 12.5 |
| DN 125 | 138.7 | 140.6 | 5.0 | 16.6 | 17.1 |
| DN 150 | 164.1 | 166.1 | 5.0 | 19.7 | 20.3 |
Dimensions of steel tubes - Heavy
| Nominal size | Outside diameter mm |
Thickness mm |
Mass of black tube kg/m |
||
| min | max | Plain or screwed ends | Screwed and socketed | ||
| DN 8 | 13.3 | 13.9 | 2.9 | 0.765 | 0.769 |
| DN 10 | 16.8 | 17.4 | 2.9 | 1.02 | 1.03 |
| DN 15 | 21.1 | 21.7 | 3.2 | 1.44 | 1.45 |
| DN 20 | 26.6 | 27.2 | 3.2 | 1.87 | 1.88 |
| DN 25 | 33.4 | 34.2 | 4.0 | 2.94 | 2.96 |
| DN 32 | 42.1 | 42.9 | 4.0 | 3.80 | 3.83 |
| DN 40 | 48.0 | 48.8 | 4.0 | 4.38 | 4.42 |
| DN 50 | 59.8 | 60.8 | 4.5 | 6.19 | 6.26 |
| DN 65 | 75.4 | 76.6 | 4.5 | 7.93 | 8.05 |
| DN 80 | 88.1 | 89.5 | 5.0 | 10.3 | 10.5 |
| DN 100 | 113.3 | 114.9 | 5.4 | 14.5 | 14.8 |
| DN 125 | 138.7 | 140.6 | 5.4 | 17.9 | 18.4 |
| DN 150 | 164.1 | 166.1 | 5.4 | 21.3 | 21.9 |
| Thickness | Light welded tubes | min 92% |
| Medium and heavy welded tubes | min 90% | |
| Medium and heavy Seamless tubes | min 87.5% | |
| Mass | total length≥150 m | ±4% |
| One steel pipe | 92% - 110% | |
| lengths | Standard lengths | 6.50 ±0.08 m |
| Exact lengths | 0 - +8 mm |
If AS 1074 steel pipe is galvanized, it should be in accordance with AS 1650.
The surface of the galvanized pipe shall be continuous, as smooth and evenly distributed as possible, and free from defects that would interfere with use.
Pipes with threads shall be galvanized before threading.
Tubes shall be distinguished by color at one end as follows:
| Tube | Color |
| Light tube | Brown |
| Medium tube | Blue |
| Heavy tube | Red |
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