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Weight of ductile cast iron pipes with T type joint
(GB/T13295-91)
| Nominal diameter DN(mm) | External diameter DE(mm) | Wall thickness T(mm) | Socket weight(Kg) | Unit weight (Kg/m) | Total weight(Kg) (6000mm long) | ||||||
| K8 | K9 | K10 | K8 | K9 | K10 | K8 | K9 | K10 | |||
| 100 | 118 | 6.1 | 4.3 | 14.9 | 15.1 | 93.7 | 95 | ||||
| 150 | 170 | 6.0 | 6.3 | 7.1 | 21.8 | 22.8 | 138 | 144 | |||
| 200 | 222 | 6.4 | 10.3 | 28.7 | 30.6 | 183 | 194 | ||||
| 250 | 274 | 6.8 | 7.5 | 14.2 | 35.6 | 40.2 | 44.3 | 228 | 255 | 280 | |
| 300 | 326 | 6.4 | 7.2 | 8.0 | 18.9 | 45.3 | 50.8 | 56.3 | 290 | 323 | 357 |
| 350 | 378 | 6.8 | 7.7 | 8.5 | 23.7 | 55.9 | 63.2 | 69.6 | 359 | 403 | 441 |
| 400 | 429 | 7.2 | 8.1 | 9.0 | 29.5 | 67.3 | 75.5 | 83.7 | 433 | 482 | 532 |
| 500 | 532 | 8.0 | 9.0 | 10 | 42.8 | 92.8 | 104.3 | 115.6 | 600 | 669 | 736 |
| 600 | 635 | 8.8 | 9.9 | 11 | 59.3 | 122 | 137.3 | 152 | 791 | 882 | 971 |
| 700 | 738 | 9.6 | 10.8 | 12 | 79.1 | 155 | 173.9 | 193 | 1009 | 1123 | 1237 |
| 800 | 842 | 10.4 | 11.7 | 13 | 102.6 | 192 | 215.2 | 239 | 1255 | 1394 | 1537 |
| 900 | 945 | 11.2 | 12.6 | 14 | 129.0 | 232 | 260.2 | 289 | 1521 | 1690 | 1863 |
| 1000 | 1048 | 12.0 | 13.5 | 15 | 161.3 | 275 | 309.3 | 343.2 | 1811 | 2017 | 2221 |
| 1200 | 1265 | 13.6 | 15.3 | 17 | 237.7 | 374 | 420.1 | 466.1 | 2482 | 2758 | 3034 |
Ductile cast iron is a kind of alloy ,carbon and silicon ,in which graphite exists in the type of spherical, generally the size of graphite is 6~7 class ,and spheroidization grade of the pipe should be controlled 1~3 class(spheroidization rate is not below 80%).Thus after spheroidization,ductile cast iron possesses the nature of iron as well as the characteristics of steel.After annealing ,its microstructure contains ferrite and a little pearlite possessing excellent mechanical properties.
Ductile cast iron pipe | Grey iron pipe | Stell pipe | |
Tensile strength (MPa) | ≥ 420 | 150--260 | ≥ 400 |
Yield strength (MPa) | ≥ 300 | NO confirmation | NO confirmation |
Bending strength (MPa) | ≥ 590 | 200--360 | ≥ 400 |
Elongation (%) | ≥ 10 | Neglected | ≥ 18 |
Brinell hardness (HBS) | ≤ 230 | ≤ 230 | 140 |
After annealing , the microstructure of ductile cast iron pipes is ferrite and a little pearlite , possessing excellent mechanical properties. | |||
The production process of ductile cast iron pipes strictly conforms to the international standard and European standard , as well ductile cast iron pipe is of excellent impact strength so that could moderate the requirements of construction of pipeline bed and protection layer, thus laying pipeline could be economical and reliable. In addition , external zinc spraying ,bitumen and epoxy coating , internal cement lining etc. could ensure the internal and external anti-corrosion of pipeline. The quality of zinc spraying of Yongtong company conforms of ISO8179 could ensure mortar firm, dense, smooth and adhesive. Its thickness is as followed list.
The hydraulic test pressure of the ductile cast pipes is as follows | |
Nominal diameter DN mm | Hydraulic test pressure (MPa) |
80≤DN≤300 | 5 |
350 ≤ DN ≤ 600 | 4 |
700≤DN≤1000 | 3.2 |
Ductile Iron Pipe
