1. The pipes standard in accordance with ISO2531, Class K9, L=6000mm,

2. T-Type joint and selfrestrained joint duictile iron pipe with cement lining conform conform to ISO4179,

3. Zinc (130G/M) + bitumen (70microns) painting accordance with ISO8179,

4. Internal cement lining was in accordance with ISO4179

5. Bitumen coating was in accordance with GB/T17459

6. All pipes according to the European standard EN545

7. Matched all necessary T-type normal rubber gaskets in accordance with ISO4633.

8. We are a state-operated corporation.