k9球墨铸铁管 k8球墨铸铁管 k7球墨铸铁管 球墨铸铁管厂家 球墨铸铁管厂 球墨管厂家 k9球墨管 k8球墨管 k7球墨管 球墨铸铁管管件
1. Expandability, high strength and pressure function and corrosion resistance of ductile iron pipes
2. The elongation can reach more than 10%, the tensile strength of the ductile iron pipe is more than 420 MPa, and the pressure value is more than 4 MPa
3. It has high deformation resistance in high-pressure water supply and gas transmission pipeline systems1、k8球墨铸铁管的可扩展性，高强度和压力函数以及抗侵蚀性

2、延伸率可以达到10%以上,涵丹球墨铸铁管抗拉强度大于420 MPa,压力值4MPa以上

3、在高压供水、输气管道系统具有抗高变形能力

4. Anti corrosion measures of ductile iron pipe paint, such as invasion resistance, corrosion resistance and service life up to 100 years;
5. Convenient installation and construction, economic project cost
6. Reliability: ductile iron pipes have high bearing capacity and certain elongation, and adopt flexible interfaces. Axial deviation of 3 to 5 degrees will not cause medium seepage and leakage, and have strong resistance to earthquake and foundation settlement..