External repair works · Advantages

B-type sleeve repair technology advantages

B-type sleeve repair consists of a pair of semi-circular steel guard plates covering the defects of the pipeline, which are welded by the longitudinal butt weld and the whole set of sleeve ends are fixed on the pipeline in the way of circumferential fillet welding. B-type sleeve is the pressure sleeve, which can withstand the internal pressure of the pipeline and the axial stress caused by the lateral load of the pipeline. Implementation standard :GB/T36701-2018 "Buried Steel Pipe Body Defect Repair Guide" Implementation standard :GB/T36701-2018 "Buried Steel Pipe Body Defect Repair Guide"

Epoxy sleeve repair technology advantages

Class A epoxy repair sleeve for pipeline is specially designed for pipeline repair and reinforcement. Implementation standard :GB/T36701-2018 "Lidi Steel Pipe Body Defects Repair Guide"

1. Scope of application and application in epoxy casing repair technology

(a) Pipe diameter range is medium 32-1620mm.

(b) Maximum pressure up to 12MPa. (c) Temperature resistance -30~+80°C

(d) Pipeline types are pipelines for the transmission of petroleum, natural gas, refined oil products, liquefied petroleum gas, petrochemical plant networks and lifting pipelines for offshore production platforms.

(e) Repair various defects such as corrosion, cracks, distortion or indentation (in both circumferential and axial directions), irregular pass, etc

2. A large range of defects that can be repaired permanently

(a) The length of wall defects and cracks is unlimited, and the average depth is up to 80% of the wall thickness and up to 90%. (b) Distortion up to 9% of the diameter, wall defects and pattern thickness up to 12%. (c) Wall defects and cracks of epoxy composite casing and its application pipe are up to 60% of the pipe circumference. The longer casing is 14m in the crude oil pipeline and 20m in the natural gas pipeline

Carbon fiber reinforcement repair technology advantages

Carbon fiber and its composite materials are new materials grown up with the development and growth of military industry. They are high-tech products with high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, low conductivity, heat transfer and thermal expansion coefficient and a series of excellent properties. They can be used as structural materials to carry loads, and can also play a role as functional materials. Therefore, carbon fiber and its composite materials have developed rapidly in recent years, and have been widely used in many fields such as aviation, aerospace, automobile, environmental engineering, chemical industry, energy, transportation, construction, electronics, sports equipment and so on. They are known as the new materials of the 21st century.

Reinforcing technology of glass fiber composite material:

Preforming method Clock Spring repair

The preforming method (Fu ure) is developed and engineered by Cok Spring in the United States. It has been successfully applied for more than 20 years in the repair operation of the outside of the camp. The preforming method adopts the composite sleeve prepared in advance according to the diameter of the pipe containing defects in the field of construction, and then binds the composite sleeve to the surface of the pipe by super glue at the repair site. So as to restore the strength of the pipeline.