1. Features and selection range

1.1 The scientific nature of construction management: the use of total quality management methods. A sound quality assurance system and technical measures have controlled the entire construction process.

1.2 The rationality of the installation process: the application of compact construction process overlap and labor organization arrangement, so that the phenomenon of process cross nesting and project quality rework is controlled, which saves labor and reduces material waste.

1.3 The feasibility of the construction process: This construction method has been practiced and improved in actual construction, and has more detailed operating process requirements and key points. Effective and effective measures are taken at the pipe interface to ensure the sealing performance of the interface, which has a wide range of feasibility.

1.4 This “Working Method” is complete in content, with a complete set of data and operating techniques.

1.5 This “Construction Method” is applicable to the installation of domestic sewage and drainage pipes for civil and industrial plant construction.

2. Process principle

The installation principle of UPVC pipe is basically the same as that of metal pipe. The difference is that UPVC pipe mainly uses adhesive to assemble different types and specifications of pipes and fittings into a system. Apply total quality management methods and set up a QC team to tackle quality technical problems. Formulate the construction process of layering and segmentation, from pipeline prefabrication to main pipe and branch pipe installation, so as to ensure the high quality of pipeline installation and construction.

Three, construction preparation

(1) Installation site preparation

1. Nuclear implementation site. For buried pipelines, trenches should be dug. The trenches must be straight, with a slope, and the bottom of the trench should be tamped. Concealed pipelines (including equipment floors, shafts, and pipelines in the ceiling) should first be checked for the elevation of various pipelines, whether there is any contradiction in the arrangement of coordinates, holes are reserved, and the embedded parts have been completed. The civil construction template has been removed, the operation site has been cleaned up, and the scaffolding should be erected when the installation height exceeds 3.5 meters. The indoor exposed pipes shall be installed two floors away from the structural progress, the indoor horizon is well bounced, and the rough decoration and plastering has been completed. The installation site has no obstacles.

2. Implement on-site construction conditions, that is, check the quality of materials on arrival, including the operating conditions of the road distance from the pipeline storage to the pre-processing site and the installation site.

3. Submit materials to the owner or the supervision company for inspection and application of the construction plan.