Epoxy glass fiber reinforced pipeline mouth repairing method

Abstract

The invention discloses an epoxy glass fiber reinforced pipeline mouth repairing method, wherein the technological process comprises the steps of sand blasting treatment for the surface of a repaired mouth, gas treatment for the surface of the repaired mouth, corrosion resistance treatment for the surface of the repaired mouth, a PE material in a repaired mouth area is polarized by using a gas treating agent, the treatment process is simple, and the surface is uniformly treated; a corrosion resistance structure and a pipe body effectively form a whole, the corrosion resistance structure is stable in long-term performance and long in service life, a solventless coating with high temperature resistance property and a high-strength glass fiber are chosen to meet the application of the high temperature environment, and the hardness and the wear resistance property of the repaired mouth are enhanced while the intrinsic technical defects of a traditional heat shrinking sleeve (band) are overcome. The epoxy glass fiber reinforced pipeline mouth repairing method is simple in process, convenient in operation, strong in adhesive force, high in corrosion resistance performance, wide in scope of applicable temperatures, and convenient in popularization and application.

Description

technical field [0001] The invention relates to the technical field of steel pipeline construction, in particular to an epoxy glass fiber reinforced pipeline filling method. Background technique [0002] Pipeline construction widely exists in many industries such as petroleum, chemical industry, electric power, communication, municipal and construction. The steel pipes used in pipeline construction must be anti-corrosion-treated pipelines. 3PE anti-corrosion structures are commonly used for external anti-corrosion of pipelines Practice has proved that this anti-corrosion structure has relatively ideal comprehensive performance, and in pipeline construction, the anti-corrosion at the weld seam of the steel pipeline joint is completed on the construction site, and the performance of the pipeline joint anti-corrosion technology used It has a significant impact on the overall anti-corrosion effect of the pipeline, and to some extent, it determines the success or failure of the a...

AI Technical Summary

Problems solved by technology

The disadvantages of this traditional heat-shrinkable sleeve (belt) jointing technology in use are: the heat-shrinkable sleeve (belt) jointing technology does not solve the problem of effective bonding between the jointing material and the PE base material, including the primer and the jointing. The bonding of the PE material in the area and the bonding of the heat-shrinkable sleeve (tape) with the primer and PE, with the destruction of environmental stress, the heat-shrinkable sleeve (tape) is prone to loosening and detachment, resulting in poor anti-corrosion effect in the patching area; Shrink sleeve (tape) filling technology requires high heating operation, and the heating degree must be strictly controlled. When the heating is insufficient, the hot melt adhesive will not completely melt, resulting in voids or bonding defects in the heat shrink sleeve (tape) structure, resulting in weak corrosion protection. When overheating, the heat shrinkable sleeve (belt) will be carbonized, resulting in damage to the heat shrinkable sleeve (belt); the sealing technology of the heat shrinkable sleeve (belt) is limited by the temperature resistance of the hot melt adhesive, and its application temperature range is low