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Matters needing attention when installing and connecting cement pipes

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更新时间:2019年07月06日11:48:51 打印此页 关闭 Clicks: 407 Updated: July 6, 2019 11:48:51 Print this page Close

Connection method of cement pipe and precautions
Cement drainage pipes are often used in municipal projects in our cities. It is often used as a drainage pipe for rainwater and sewage in the city. If there is no cement pipe, the road will be filled with rainwater and days falling from the sky. Sewage, we will live in a sea of water, there is no place to stay, so it plays a very important role in urban construction, there is no substitute. When installing cement pipes, we must carefully construct according to specific procedures and plans.
Connection method of cement pipe and precautions
(I) Device connection method for cement pipe
Cement pipes, also known as cement pressure pipes and reinforced concrete pipes, can be used as sewage pipes in urban construction foundations, which can discharge sewage, flood and drainage, as well as water pipes and farm machinery wells used in some special factories and mines. Generally divided into: flat mouth reinforced concrete cement pipe, flexible grooved reinforced concrete cement pipe, socket socket reinforced concrete cement pipe, F-shaped steel socket cement pipe, flat mouth ring joint cement pipe, tongue and groove cement pipe and so on. There are various types of cement pipes. Let us introduce the connection specifications and precautions of cement pipe installations on behalf of reinforced concrete drainage pipes for rainwater and sewage discharge on municipal roads.
Connection method of cement pipe and precautions
1. Set the centerline of the pipeline: Before construction, the starting point, end, plane vertices, vertical vertices, and straight line control center piles of the centerline can be measured at the site according to the centerline control points given in the plan. The appropriate position outside the trench is to set the directional control pile and determine the pile number by measurement.
2. Establish a temporary level: Pipeline projects often need to add a temporary level, which should be set in a stable and not easily collided place, and the distance should be no more than 30 meters. Temporary level closing difference should meet the rules and regulations.
3. Excavator excavation is the main method for trench excavation, supplemented by manual bottom cleaning. Manual excavation is adopted for the rainwater bucket connection pipe and branch pipe. During the excavation process, pay attention to the investigation of soil quality changes, and use support and support for road sections with signs of collapse.
Connection method of cement pipe and precautions
4. The excavator excavates to a height of about 10cm at the bottom of the trough. It is reserved for the bottom of the trough to not be digged. Afterwards, it is manually removed and the bottom of the trough is trimmed. Manually clear the trough, carefully check the soil at the bottom of the trough for any disturbance, and if there is disturbance, special treatment should be done.
5. On both sides of the trench, one meter above the bottom of the trench, symmetrically set the elevation piles, and nail the same height elevation nails. Before the trench is bottomed and the pouring is flat, the elevation of the centerline of the pipe canal and the elevation pile should be retested.
6. The height of the single-sided pile of soil near the groove is not more than 2 meters, and the distance from the edge of the groove is not less than 1 meter. The maintenance of underground pipelines in trench construction requires the relevant departments to cross the pipeline first to clarify the fundamental location of the underground equipment. When necessary, excavate sample holes to find out the precise location, facilitate construction, and ensure the safety of various embedded pipelines During construction, support and maintenance measures are selected for exposed pipelines.
7. After the connection of the device is completed, a water discharge test must be done. Carefully investigate for a period of time to check for water seepage and leakage, and fix the problem in time.
Connection method of cement pipe and precautions
(II) Attentions for the connection of cement pipe installations
Connection method of cement pipe and precautions
1. Within the regular cooling time, the newly welded joint can also be corrected, and it can be rotated a little, but after the cooling time, forcible correction is prohibited. Note: the connected pipes and fittings should not be skewed. It must be horizontal and vertical to prevent the wrong point of view when installing the faucet and the device cannot be installed normally.
2. During the regular cooling time, it is forbidden to subject the freshly processed joints to external forces.
3. When using PP-R pipe fittings with metal threads, the white raw material tape must be tightly sealed to prevent water leakage from the threads.
4. When the PP-R pipe fittings with metal threads are over-tightened, the pipe fittings may crack and cause water leakage. Pay attention to moderate force.
Connection method of cement pipe and precautions
5. It should be fixed with professional pipe clips. If not, use hook nails to prevent damage to the water pipes and reduce the life of the water pipes. The distance between the cold water pipe and the pipe is usually 50 ± 5cm, and the distance between the hot water pipe and the pipe is 35 ± 5cm. If the pipe is not in place, it will cause the water pipe to tremble and cause noise.
6. The direction of the water pipe should be horizontal and vertical (under the premise that the slot is horizontal and vertical) to prevent the water pipe from being pulled or twisted hard, forming a water outlet that is not parallel to the wall surface, affecting the beautiful and mixing faucet device.
7. When the waterway is renovated, the cold and hot water that are reserved for the installation of electric water heaters and water taps in the future will be put on the water.
Connection method of cement pipe and precautions
(3) Four points should be paid attention to when transforming
Connection method of cement pipe and precautions
A ensure a distance of 15 cm (currently most electric water heaters, water faucet hot and cold water supply distance is 15 cm, there is a single 10 cm).
B. The height of the cold and hot water inlet pipes is the same.
C. The hot and cold water supply pipe openings are vertical to the wall surface. In the future, you should also pay attention not to let the bricklayer get distorted.
D. The hot and cold water supply nozzles should be two centimeters higher than the wall surface. When laying the bricks, the bricklayer should also require that after the bricks are laid, make sure that the bricks are at the same level as the water pipe nozzles. If the scale is not suitable, the installation of electric water heaters and water faucets in the future may require the purchase of other couplings such as pipe clamps and inner wires to complete the installation.
Connection method of cement pipe and precautions
After the piping installation is completed, pay attention to product maintenance. The water pipes running on the ground should be leveled with cement and yellow sand to prevent direct footing or heavy pressure.
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