Insulated fixed thrust piers for oil and gas pipelines, design and fabrication method and application thereof

By using polypropylene sleeves and loose flanges to replace precast metal components, the design and construction of fixed piers are simplified, solving the problems of cumbersome procedures and inconsistencies in existing technologies, and achieving efficient construction for insulation protection and thrust transfer.

CN119712968BActive Publication Date: 2025-12-12CHANGQING ENGINEERING DESIGN CO LTD +1
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Patent Information

Application Number
CN202311255513.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-12-12
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

Existing fixed pier design methods are cumbersome, metal prefabricated component designs are inconsistent, making it difficult to adapt to non-metallic pipelines, and the construction cycle is long with a high failure rate.

Method used

Polypropylene sleeves and loose flanges are used to replace precast metal components. The polypropylene sleeves are fitted around the oil and gas pipeline, and concrete is poured on site to form an insulated and fixed thrust pipe pier. The loose flanges are made of carbon structural steel and are directly fitted onto the pipeline and fastened with bolts, eliminating the need for cutting and welding.

Benefits of technology

It simplifies the construction process, shortens the construction cycle, reduces the defect rate, is applicable to both metal and non-metal pipelines, and achieves insulation protection and thrust transmission.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides an oil and gas pipeline insulation fixed thrust pipe pier, a design and manufacturing method and application thereof, and belongs to the technical field of oil and gas pipeline protection. The oil and gas pipeline insulation fixed thrust pipe pier comprises a polypropylene sleeve, a loose sleeve flange, and cast-in-situ concrete formed around the polypropylene sleeve, the loose sleeve flange and the oil and gas pipeline to wrap and fix the polypropylene sleeve, the loose sleeve flange and the oil and gas pipeline in the concrete pier. The polypropylene sleeve is sleeved on the oil and gas pipeline to protect the outer surface of the oil and gas pipeline by the polypropylene sleeve, the loose sleeve flange is sleeved on the polypropylene sleeve to replace the conventional reinforcing sleeve, fixed thrust baffle and reinforcing rib plate, the polypropylene sleeve and the loose sleeve flange are both finished products, and the cutting, processing, rust removal, welding and nondestructive testing of metal prefabricated parts in a prefabricating factory or a construction site are cancelled, so that the construction period is shortened.
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Citation Information

Patent Citations

  • Pipeline fixing device

    CN209067950U

  • Flange coupling, and metal pipe joining structure

    CN101932865A

  • Pressure-proof flange

    CN103363215A