球墨铸铁管打压作者: -1 发布时间: 2018-07-26 次浏览
The suppression experiment of ductile iron pipe is to ensure that the quality of its use is ensured, so as to prevent leakage. At the same time, when doing the experiment, there are some points to note. Once the processing is not good, the effect will be affected. The following manufacturers of ductile iron pipes tell you what matters should be noted in the pressing process.
the top of all pipes before the test of ductile iron pipe is to fill in the compacted soil except for the interface part。 The thickness should not be less than 50 cm。 All pipe dead I is blocked by flange blind plate, and the steel pipe is pre welded on both sides of the main pipe, the upstream is the exhaust and the downstream is the pressing mouth。
after the pipe is blocked by the flange blind plate, the blind plate on each side of the main pipe is directly mounted on the blind board with the jack (quantity and tonnage required by calculation). The back seat of the jack is a vertical double row of sleepers, and the back of the sleepers is rammed lime soil or original soil.
after completion of hydrostatic test in the pipeline from the water from the pump for the convenience of the fire hydrant valve, exhaust valve or valve discharge pressure。
the exhaust port is selected at the highest point of the pipe, welding a steel pipe on the flange blind plate, connecting the double ball valve as the exhaust port, and the intake port is not placed at the low flange interface of the pipe. The pressing port is also installed at the flange interface of the main pipe with a low pipeline.
the pressure pump selects the electric pressure pump or the manual pressure pump. The pressure meter is installed in the three port, and the gate valve is set between the pipe and the press to control the pressure.
water is injected slowly after both ends are blocked, and gas in the pipeline is discharged through the exhaust valve. The flange plate in the middle should be installed after water overflow, and sealed after water filling.