Shanghai Songjiang Vibration Absorber Co., Ltd.’s official website introduces the information on quality inspection and acceptance standards for integrated prefabricated pump stations. Songjiang Group provides high-quality rubber expansion joints for numerous integrated prefabricated pump stations, with a 10-year warranty. The following are the quality inspection and acceptance standards.
The integrated prefabricated pump station is equipment used for lifting sewage, rainwater, drinking water, and wastewater. It is assembled in the factory and transported to the site for installation as a pressurized pump station.
It consists of a top cover, glass reinforced plastic (GRP) cylinder, base, submersible pump, service platform, pipes, etc., to meet the requirements for pressurized drainage.
General Provisions: Quality inspection and acceptance should be carried out by the construction unit based on self-inspection qualification, and reported to the supervising (construction) unit for quality inspection according to the prescribed procedures. The division of inspection batches can be based on consistency with the construction process and convenience for construction and acceptance, jointly determined by the construction, supervision, and construction units. The quality acceptance of inspection batches should be based on the main control items and general items, organized by the supervising unit for acceptance by the construction unit, construction unit, etc. The construction quality of prefabricated pump stations should comply with the requirements of the design documents and relevant professional acceptance standards. The installation of mechanical and electrical equipment should comply with the current industry standard “Pump Station Installation and Acceptance” SL 317.
Inspection and Acceptance: Main Control Items: The appearance quality of prefabricated pump stations should meet the following requirements: The outer wall should be smooth and flat, without air bubbles, cracks, dents, or damage deformations. The color of the wellbore should be consistent, with intact interfaces and no cracks or deformations. Inspection Quantity: Full inspection. Inspection Method: Visual inspection. The components, devices, components, and main materials of the prefabricated pump station, as well as the device materials and equipment oils used for installation, should meet the requirements of the engineering design and their product standards, and have inspection certificates or factory qualification certificates. Inspection Quantity: Full inspection. Inspection Method: Visual inspection. The quality of the well base and pipeline installation should meet the following requirements: The allowable deviation of the well base inlet elevation is 0-10 mm. Inspection Quantity: 1 point for each interface. Inspection Method: Measured with a total station or level. Each interface connecting the well base and the pipeline is firm, with no foreign objects inside the well. Inspection Quantity: 1 point for each interface. Inspection Method: Each interface is inspected with a retroreflective mirror. The center deviation of the well base is less than or equal to 20 mm. Inspection Quantity: 1 point for each well. Inspection Method: Measured with a total station or theodolite. The installation quality of the wellbore should meet the following requirements: The allowable deviation of the wellhead elevation is ±10 mm. Inspection Quantity: 1 point at the center of each wellhead. Inspection Method: Measured with a total station or level. The allowable deviation of the wellbore verticality is 0.5º. Inspection Quantity: 4 points around each well. Inspection Method: Measured with a total station or theodolite.
General Items: The quality of the prefabricated pump station foundation should meet the following requirements: The allowable deviation of the foundation elevation is 0-15 mm. Inspection Quantity: 1 point for each well. Inspection Method: Measured with a level. The allowable deviation of the width on both sides of the foundation is 0-10 mm. Inspection Quantity: 2 points for each pit. Inspection Method: Measured with a ruler. The allowable deviation of the foundation thickness is 0-10 mm. Inspection Quantity: 1 point for each pit. Inspection Method: Measured with a ruler. The materials used for backfilling the foundation should meet the design requirements. Inspection Method: Observed, checked according to national regulations and design requirements, and checked with inspection reports. The quality of the pit backfill should meet the following requirements: The backfill material meets the design requirements. No water should be brought back during backfilling, and the backfill should be compacted. The compaction degree of backfill should be consistent with that of the pipeline trench backfill. The backfill should be layered and symmetrical according to the design requirements and compacted. The compactness of the backfilled soil in the pit should meet the requirements of Table 6.7.2. Inspection Quantity: 4 points around the wellbore. Inspection Method: Observation, inspection reports, inspection of construction records, and measurement with soil compaction density tester. The diameter deformation of the wellbore shall not exceed 0.03 times the designed wellbore diameter (Do). Inspection Quantity: 2 points around the wellbore. Inspection Method: Measured with a steel ruler.
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