The pipes standard in accordance with ISO2531, Class K9, L= 6000 mm , T- Type joint, Portland cement mortar lining and bitumen coating
1. The pipes standard in accordance with ISO2531, Class K9, L= 6000 mm , 2. T- Type joint, Portland cement mortar lining acc to ISO4179- 95, 3. Zinc (130g/ M) + bitumen (70microns) painting accordance with ISO8179, 4. internal cement lining was in accordance with ISO41795. bitumen coating was in accordance with GB/ T17459 . 6. all pipes according to the european standard EN5457. matched all necessary T- type normal rubber gaskets in accordance with ISO4633.