Technical requirements for the installation of electric heating on offshore oil platforms

Published on:

2023-04-06 12:02

Oil and gas pipelines are the main part of the offshore platform construction project. During long-term operation of the pipeline, in conditions of severe external weather and other weather conditions, the operational condition of the pipeline will be affected to varying degrees, therefore, the gas oil pipeline must be isolated.

At present, the oil, gas and water pipelines of offshore oil platforms mainly use heat preservation in the heat preservation environment and electric heating. In special cases, these two forms of heat preservation can be used together. The first is mainly based on the low thermal conductivity of the insulating medium (for example, mineral wool, glass wool, rubber and foam, etc. E.) to reduce the heat loss of fluid in the pipeline.

Volume lost; the latter uses electrical energy to replenish heat lost by the medium in the pipeline during the process, so that its temperature can be maintained within the most acceptable range of process temperatures. 、 From the according to the to-the-from-to-the-the-in position 不 不达达不 保olev to the "with a. bts"

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The surface of the pipeline to be laid shall be cleaned of oil, foreign inclusions and sharp edges and corners, and if any, shall be sanded to smoothness and then coated with aluminum foil.

It is forbidden to cross or overlap the laying of electric heating cables to prevent overheating and affect the service life.

Due to the presence of pipe joints, shut-off valves, etc. The actual length of the electric heating cable to be laid will be slightly more than the calculated one, so there should be a margin along its length, as a rule, in the range of 5%-10%.

The insulation resistance must be measured before installation, and its value must be at least 10 Mhm, and the test run can only be performed if the resistance core is certified.

Before the test start, check the wiring of each functional switch of the electrical control cabinet and start it for 1 hour, and the insulation of the pipeline can only be performed if there are no violations in the operation of all departments.

The temperature sensor and measurement probe should be placed at the lowest temperature point at the top of the pipe, attached only to the outer wall of the measured pipe, fixed with an aluminum foil tape, and should not touch the heating cable. At the same time away from the heating organ more than 1 m.

The surface of the pipeline to be laid shall be cleaned of oil, foreign inclusions and sharp edges and corners, and if any, shall be sanded to smoothness and then coated with aluminum foil.

It is forbidden to cross or overlap the laying of electric heating cables to prevent overheating and affect the service life.

Due to the presence of pipe joints, shut-off valves, etc. The actual length of the electric heating cable to be laid will be slightly more than the calculated one, so there should be a margin along its length, as a rule, in the range of 5%-10%.

The insulation resistance must be measured before installation, and its value must be at least 10 Mhm, and the test run can only be performed if the resistance core is certified.

Before the test start, check the wiring of each functional switch of the electrical control cabinet and start it for 1 hour, and the insulation of the pipeline can only be performed if there are no violations in the operation of all departments.

The temperature sensor and measurement probe should be placed at the lowest temperature point at the top of the pipe, attached only to the outer wall of the measured pipe, fixed with aluminum foil tape, and should not touch the heating cable. At the same time away from the heating organ more than 1 m.

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