An experimental device for welding recondition on tubes in service

Abstract

The invention pertains to the field of welding devices, in particular to an experimental device used for in-service welding repair of pipelines, which is characterized in that the device is composed of a water tank (1), a thermometer (2), a circular circuit (3), a high-pressure pump (4), a valve (5), a pipeline (6), a bottom plate (7), a repair plate (8) and a flowmeter (9). The lower end of the water tank (1) is connected with the high-pressure pump (4) via the circular circuit (3) of a galvanized pipe; the thermometer (2) is arranged on the inner wall of the water tank; the high-pressure pump, the valve (5), the experimental pipeline (6) and the flowmeter (9) are connected via the circular circuit; the terminal pipeline of the circular circuit is inserted to the water tank; the bottom plate (7) and the repair plate (8) are materials to be welded for the research of in-service welding, and are arranged on a groove of the pipeline. The invention has the advantages of that: in-service welding simulation experiments can be operated on the pipelines with different wall thicknesses under the conditions of different water velocities and water temperatures; the process is safe, the structure is simple, and the operation is simple; the device can be applied in the simulation assessment and research of comprehensive performance of the in-service welding joints of the pipelines.

Description

technical field [0001] The invention belongs to the field of welding devices, and in particular provides an experimental device for in-service welding repair of pipelines, which is suitable for performing welding operations under the condition of medium transportation inside the pipeline. Background technique [0002] During the service of oil and gas pipelines, due to corrosion, wear and accidental damage, etc., it is inevitable to cause local thinning, damage and even leakage accidents of the pipeline. Pipeline in-service welding repair technology has huge economic effects and broad application prospects because it can maintain the continuity of pipeline operation, repair time is short, fast, and environmental pollution is small. However, there are often two problems in in-service welded pipes: burn-through and hydrogen-induced cracking, so the safety of in-service welding becomes the main difficulty in judging its applicability and process feasibility. In order to study ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an experimental device for the evaluation and research of in-service welding repair of oil and gas pipelines, which solves the problems of high risk and high cost of actual pipeline in-service welding evaluation, and can quickly and conveniently test the flow of different media in the laboratory. The quality of welded joints under the conditions and welding process conditions is evaluated and systematically studied

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