Information Center

   Overview of 1. pipes

    PEAs a new type of pipe, water supply pipe has corrosion resistance, non-toxic, smooth inner wall resistanceSmall, anti-aging and long service life (50Year), light weight (density only steel pipe1/8), InstallationLow labor intensity, low construction cost, strong seismic performance, good material flexibility and so on.

Mobilization and Inspection of 2. Materials

     To ensure the quality of the project,We fill in the entry declaration form before the material enters the site.,Report to the supervisor for acceptance, Supervision according to the specification (GB50242--20021) Type, specification and appearance of materials entering the siteAcceptance,Packaging shall be intact,The surface shall be free of scratches and external force impact damage,The appearance of the whole tube should be smooth,No color unevenness,Check the wall thickness and roundness of the pipe. Check whether the products issued by the manufacturer are qualified.Quality certification documents such as certificates, quality acceptance reports and use permits issued by government authorities.,Sign and acknowledge after meeting the requirements. After material mobilization,We are in accordance with the provisions of the batch and frequency of the entry of the material.Witness sampling and inspection of materials and accessories,Construction can only be carried out after passing the inspection.

    3. construction sequence:

     Pouring concrete

    1, Pipe Installation

     (1)、PEThe pipe is connected by hot melt, because the method is low cost, good quality of the pipe interface, no need.Advantages such as pipe fittings.,

     The main steps of hot melt connection are:

     2. Material preparation: Place the pipe or pipe fitting in a flat position, put it on the docking machine, and leave enough10-20mmof the cutting allowance.

     Clamping: according to the welded pipe, pipe fittings to select the appropriate slip clamp, clamping pipe,Get ready for cutting.

     Cutting: cutting the impurities and oxide layer on the end face of the welded pipe section and pipe fitting to ensure the two butt ends.Smooth, smooth, no impurities.

Destroys the location.

     2When the system is filled with water, the exhaust valve at each height of the pipeline should be opened to exhaust the air. To be filled with waterAfter full, close the discharge valve and use the electric pressure test pump to pressurize. The pressure should gradually increase to a certain value.When, should stop to check the pipeline, no problem to continue to pressurize, generally points2~3Second rise to testCheck the pressure. When the pressure reaches the test pressure, stop pressurizing and keep the constant pressure10minutes, on the interface tubeThere is no damage or water leakage in the body inspection, and the pipeline strength test is considered qualified. Under test pressure,10Minute pressure drop not more0(02MPaIt can be considered that the tightness test is qualified and the pressure test quality is excellent.Good. The quality and safety staff of the team shall make timely pressure test records.

    Quality Assurance Measures for 5. Pipeline Installation

     14. Carefully check the pipes or parts to meet the specifications, and remove the sundries in the pipe.

     23. If the pipe is found to have appearance damage, it shall be prohibited to use.

     3Check whether there is enough space for welding position.

     4Before welding, the center line and elevation of the pipe shall be carefully inspected to meet the design and specification requirements. Quality Assurance Measures for 6. Valve Installation

     1Before installing the valve, check the model according to the design requirements, remove the dirt in the valve, and check the valve stem.Check whether the rotation is flexible, make clear the rotation direction of the switch, and whether the valve body has cracks, sand holes, etc.Whether the flange plane is flat and straight, whether the water stop line is clear and whether the screw hole meets the standard.

     21. Brick-built valve wells shall be protected and provided with anti-collision during pipeline construction.Signs of the measures for protection.

    Quality Assurance Measures for 7. Pipeline Pressure Test

     13. The pressure gauge shall be inspected within the effective inspection period before the hydrostatic test.

     2When the pipeline enters water, exhaust gas shall be carefully carried out, and the exhaust point shall be selected at the high position of the pipe section as far as possible.

     34. During the hydrostatic test, the pressure shall be gradually increased, and a special person shall be responsible for observation and inspection.