Frequently Asked Questions About The Installation Of Poly PEX Fittings

　　What are the common problems with the installation of Poly PEX fittings? A proper installation method can not only ensure the normal development of daily life in production but also increase the service life of the pipe fittings and reduce the cost of capital investment. The following are the common problems in the installation of Poly PEX fittings:

　　1. Before the construction of the project, cooperate with the project supervision and general contracting company to inspect the plaster layer in the room if the construction conditions are not available on the spot (such as insufficient road surface flatness, road design elevation that does not meet the requirements, and road dirt accumulation Such conditions) or the necessary conditions of the tunneling work area cannot meet the geothermal heating construction schedule plan, and the geothermal heating project construction cannot be carried out under this condition.

　　2. During the construction of the HVAC project, first fix the divider and water collector on the wall in a horizontal direction according to the proportion of the drawing.

　　3. In addition to the previous item, it is a paving polystyrene insulation board. The actual regulations are as follows: Remember! Installation precautions for Poly PEX fittings Remember! Frequently Asked Questions about the Installation of Poly PEX Fittings

　　3.1. Install the foam slats of thin thickness × aspect ratio = pe pipe 20 mm × 60 mm (as specified by the bidder) along the wall of the room; part of the heat transfer chassis pipe in the toilet and room is not used as a boundary warm temperate zone.

　　3.2. The paving 20mm thick foam board stipulates that it is leveled and the steel bars are tightly overlapped; the bathroom and restaurant kitchen shall be embedded in sanitary ware and the dining room kitchen countertop according to the engineering drawings and the specific conditions on the spot.

　　4. According to the construction drawings, the precise positioning of the construction line should meet the requirements of the engineering drawings. It is stipulated that the specification of Poly PEX fittings from the wall should not be less than 100 mm. Poly PEX fittings will be located along the wall ≤ 100 mm from the wall. Considering the room’s Poly PEX fittings interval standard, effective adjustments are made based on the specific situation on the spot.

　　5. Pave the Poly PEX fittings according to the engineering drawings: the bending radius of Poly PEX fittings shall not be less than 8 times the pipe diameter; in the paving, the plastic cable tie shall be installed every 600mm of the pipe section; the distance between the bent pipes shall not exceed 350mm plastic cable ties; when paving S-shaped Poly PEX fittings, multiple plastic cable ties should be installed at the bending position. If there is a warped condition, use cement steel nails to fix it or suspend the object to be flat. And the restaurant kitchen can not use cement steel nails to fix the pipe fittings to prevent damage to the ground and waterproof.

　　6. Before connecting the Poly PEX fittings to the sub and water collectors, the connection specifications should be accurately measured, and the fracture surface should be cut with a special type pipe. The cross-section of the branch pipe should be perpendicular to the centerline of the pipe. The fracture surface should be repaired and removed. , The water collector and Poly PEX fittings socket are pipe clamp-type self-tightening connections, insert the pipe head and tighten the female.

　　7. After all installations are completed, carry out a pressure test: connect the water inlet pipe to temporary water resources, open the seepage gate valve, drain pipe gate valve, fill the water, exhaust pipes to the drain port without air bubbles, store the water and apply pressure, and test the pressure manually The pump is charged slowly, and the pressure change time is not less than 15 minutes, and the experimental working pressure is 1.2Mpa. The pressure is terminated. The regulator tube does not seep for 1 hour, and then fills to 0.5Mpa, and the gas pressure does not exceed within ten minutes. 0.05Mpa is the standard. After each task has been self-inspected and reached the standard, the next process of engineering construction can be carried out. In this process, the water pressure test record must be made immediately and signed by the project supervision project.

　　8. After a pressure test meets the standard, fill with concrete while maintaining the working pressure of 0.5Mpa, and the heating system will maintain the working pressure during the concrete pouring period of the next two days. Prevent damage to the surface of Poly PEX fittings and damage the sequence of Poly PEX fittings during the whole process of filling the concrete.

　　9. After the expiration of the maintenance period of the concrete filling layer, the second completion link shall be carried out to apply pressure. The procedure and operation steps of the procedure shall be operated according to the first pressure test procedure, and the application shall be completed and submitted for inspection.