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Cheap Price K7 K9 Ductile Iron Pipes Engineering Pipe for Municipal Cast Iron Pipe Bulk Seamless Round Anti-corrosion Coated
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| Nominal | Minimum tensile | Minimum 0.2% | Minimum elongation | Hardness |
| Size | strength, Rm | proof stress, Rp0.2 | after fracture,A | |
| DN | Mpa | Mpa | % | HB |
| 80-1000 | ≥420 | ≥300 | ≥10 | ≤230 |
| 1100-2600 | ≥7 |
| DN | Nominal value | Tolerance 1) | Maximum crack width and radial displacement |
| 80-300 | 4 | -1.5 | 0.4 |
| 350-600 | 5 | -2 | 0.5 |
| 700-1200 | 6 | -2.5 | 0.6 |
| 1400-2000 | 9 | -3 | 0.8 |
| 1）A negative tolerance only is given. | |||
| Note: Pipe end may have a chamfer of maximum length 50 mm. | |||
| External coatings | Internal coating(linings) | Coating of the joint area |
| - Metallic zinc with finishing layer, in accordance with ISO 8179-1; | - Portland/Blast furnace slag/Sulphate/ High Aluminum Cement Mortar, in accordance with ISO 4179; | - Epoxy coating; |
| - Zinc rich paint with finishing layer, in accordance with ISO 8179-2; | - Cement mortar lining with seal coat, in accordance with ISO 16132; | - Polyurethane coating |
| - Epoxy coating, in accordance with EN 14901; | - Epoxy coating, in accordance with EN 14901; | |
| - Polyethylene sleeve, in accordance with ISO 8180; | - Polyurethane lining in accordance with EN 15655; | |
| - Alloy of zinc and aluminum with or without other metals, having a minimum mass of 400 g/m2, with finishing layer; | ||
| - Extruded polyethylene coating in accordance with EN 14628; | ||
| - Polyurethane coating in accordance with EN 15189; | ||
| - Cement mortar coating in accordance with EN 15542; | ||
| - Adhesive tape; |
