Seven steps to acceptance of floor heating

    (1) The low-temperature radiant heating system shall undergo intermediate acceptance and completion acceptance.

    (2) The intermediate acceptance of the floor heating is from the laying of the insulation layer to the heating pipe laying and the installation of the anti-heat medium collection and distribution device. The pressure test is carried out by the construction unit in conjunction with the relevant parties.

    (3) The completion acceptance of floor heating shall be carried out jointly by the competent unit to organize construction, supervision, construction and related units. Completion acceptance shall have construction drawings and design change documents, inspection reports of main materials, products and parts, factory qualification certificates and concealed engineering inspection records, intermediate inspection records, pressure test records, and engineering quality inspection and evaluation records.

    (4) Steps of floor heating water pressure test:

    1. Before the water pressure test, safe and effective fixing and protection measures should be taken for the pressure test pipeline and components. The water test pressure should be 1.5 times the working pressure, and the minimum should not be less than 0.6Mpa.

    2. In the water pressure test, water is slowly injected through the water separator, and the air in the pipeline is discharged at the same time. After being filled with water, perform a water tightness check.

    3. Slowly increase the pressure with water, and the time to increase the wall-hung boiler shall not be less than 5 minutes. After the pressure is increased to the working pressure, stabilize the pressure for 5 minutes, observe whether there is water leakage, and make up the pressure to the specified test pressure, and the pressure drop shall not exceed within 10 minutes 0.03Mpa is qualified.

    4. Feasible anti-freezing measures should be taken when conducting hydrostatic experiments in winter.

    (5) Experimental steps of floor heating pressure:

    1. Before the pressure test, safe and effective fixing and protection measures should be taken for the pressure test pipelines and components. The gas pressure test pressure of the gas boiler should be 1.5 times the working pressure, and the minimum should not be less than 0.6Mpa.

    2. The air compressor is used to gradually pressurize through the water separator to check the air tightness.

    3. When the pressure is increased to the working pressure, the pressure is stabilized for 5 minutes. If there is no leakage, the pressure can be continued to the experimental pressure. The pressure drop within 5 minutes is no more than 0.05Mpa as qualified.

    (6) The intermediate acceptance and completion acceptance of floor heating shall meet the design requirements and the provisions of this technical requirement, and there shall be no leakage of pipelines and components. Only the valve can be opened flexibly and tightly can pass the acceptance.

    (7) The intermediate acceptance and completion acceptance of the floor heating shall be recorded, signed and archived.