1. Floor heating inspection, commissioning and acceptance shall be submitted by the construction unit in a written report. The supervision unit shall organize inspections and acceptance by relevant professionals and shall make records.
2. The professional construction unit of the floor heating system project shall have relevant construction qualifications. The inspection personnel of the project quality shall have corresponding professional and technical qualifications.
3. The inspection, adjustment and acceptance of floor heating systems shall follow the principle of “coordinating and coordinating with all parties concernedâ€. Before the handover of various professions and processes or concealment, the following contents shall be checked and accepted, and conclusions shall be drawn. :
1 The quality of pipelines, branches, water collectors, valves, fittings, insulation materials, etc.
2 piping, valves and other installation quality;
3 concealed before the hydraulic pressure test inspection and acceptance;
4 The inspection and acceptance of the construction quality of the original ground, filling layer and surface layer;
5 Intermediate handover quality inspection and acceptance;
6 concealed hydraulic pressure test and acceptance;
7 loop, system commissioning commissioning.
4, construction plans and materials, equipment inspection
(1) The construction unit shall prepare the construction organization design or construction plan according to the construction drawings and engineering technical standards, and the construction can only be carried out after approval.
(2) The main materials, equipment components, valves, fittings, and heat insulation materials used in the floor heating system must have quality certification documents. The specifications, models, and performance specifications should meet the relevant national technical standards and should be checked and accepted when approaching the site.
(3) Prior to installation of the valve, sub-collector assembly, strength and tightness tests should be done. Experiments should be conducted in each batch (of the same brand number, same model, same specification) for 10%, and not less than one, for installation in The bypass valves on the water inlet and collector outlets and bypass piping shall be tested one by one for strength and tightness and shall be fully qualified.
(4) The strength of the valve test is 1,5 times the pressure working pressure; the tightness test pressure is 1,2 times the working pressure, the valve strength and tightness test duration of DN ≤ 50mm is 15 seconds, during which the pressure remains unchanged, and Shell, packing and sealing surface no leakage.
5. Acceptance of construction installation quality
(1) After the heating pipe of the floor heating system has been installed, the construction unit shall, in accordance with the requirements of the concealed project, carry out the intermediate acceptance by the construction unit together with the supervision unit before filling the concrete layer with mixed soil.
(2) When the floor heating system carries out the intermediate acceptance, the following items must be inspected and conclusions must be drawn:
1 whether the thickness of insulation layer, laying and physical properties of materials are in compliance with the requirements;
2 Whether the material of the heating pipe, the outer diameter of the pipe, the wall thickness, the spacing between the pipes, the bending radius, etc. meet the design requirements, and whether the fixing is reliable or not;
3 Whether the expansion joint is laid according to the regulations;
6. Divided water collectors (including connectors, etc.) shall have finished product protection measures after installation, and the casing out of the ground shall have fixed measures.
7. There should be no joints in the heating pipe in the filling layer. Construction standards and allowable deviations of the pipeline installation engineering and construction standards and allowable deviations of the original ground, filling layer and surface layer shall comply with relevant regulations.
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