CPVC Power Pipe Procurement Reference for Urban and Rural Power Grid Ground Entry Project

Core performance requirements for adaptation engineering

The ground-entry projects of urban and rural power grids are mostly buried laying scenarios, which require high insulation, corrosion resistance and deformation resistance of power protection pipes. CPVC power pipes use modified polyvinyl chloride as the main raw material, and the Vicat softening temperature can reach more than 93 ° C, which can withstand the operating temperature of power cables below 90 ° C. The insulation breakdown strength is much higher than the industry standard, and there will be no leakage and breakdown hidden dangers. At the same time, the product is resistant to acid and alkali corrosion. There is no need for additional anti-corrosion treatment for buried laying. The normal service life can reach more than 50 years. It is suitable for ground-entry projects in urban and rural areas with different geological conditions.

Core evaluation criteria for procurement selection

When purchasing, it is necessary to determine the parameters and indicators in combination with the engineering laying scene. For areas with small loads such as sidewalks and green belts, products with ring stiffness grades not lower than SN8 can be selected; for heavy-duty areas such as motor vehicle lanes and passages, products with ring stiffness not lower than SN12 need to be selected. At the same time, it is necessary to check whether the wall thickness tolerance of the product meets the standard requirements to avoid problems of uneven wall thickness and excessive negative tolerance. Suppliers can be required to provide test reports, focusing on checking core indicators such as drop hammer impact test and Vicat softening temperature. Do not simply use low prices as the basis for purchasing decisions.

Precautions for supporting construction

In the procurement stage, the matching degree of the supporting pipe fittings needs to be confirmed synchronously, including the specifications of direct joints, pipe pillows and other accessories need to be fully adapted to the pipe materials, so as to avoid the problem of poor connection in the later construction. When the pipe enters the site, it is necessary to check whether there are scratches, cracks, depressions and other defects on the surface one by one, and unqualified products should be cleared in time. When the construction is completed, the laying requirements should be clearly defined. The bottom of the ditch needs to be cleaned up for sharp debris. When backfilling, the top of the pipe should be covered with fine soil for more than 30cm and then rammed layer by layer to avoid the pipe being squeezed and deformed by external forces,