SYI can supply the Centrifugally Cast Ductile Iron Restrained Joint Socket and Spigot Pipe according to ISO 10804, ISO2531, EN545, EN598, from DN80 to DN2000, including K7, K8, K9, K10,K12, K14, C20, C25, C30, C40, C50, C64, C100, with the coating of Metallic Zinc (130-400g/m2), Zn-Al Alloy 85/15, Black Bitumen coating, Red/Blue Epoxy coating, Cement lining or PU (polyurethane) coating.
STANDARD
- Mechanical properties
| Nominal
Size
DN |
Minimum tensile
strength, Rm Mpa |
Minimum 0.2%
proof stress, Rp0.2 Mpa |
Minimum elongation
after fracture,A % |
Hardness
HB |
| 80-1000 | ≥420 | ≥300 | ≥10 | ≤230 |
| 1100-2600 | ≥7 | |||
| Note:
1. By agreement between manufacture and purchaser, the 0.2% proof stress (Rp0.2) may be measured. It shall be not less than: · 270 MPa when A≥12% for DN 40 to DN 1000 or A≥10% for DN ＞1000; · 300 MPa in other cases. 2. DN 40 to DN 1000, the minimum elongation after fracture shall be 7% for thickness classes over K12.
|
||||
- Works test pressure
| Nominal Size
DN |
Hydrostatic works test pressure
bar |
| 80-300 | 50 |
| 350-600 | 40 |
| 700-1000 | 32 |
| 1200-2000 | 25 |
| 2200-2600 | 18 |
