Analysis of the characteristics of oil pipelines and pipeline protection measures

【1】 The installation of gear pump pipelines is a part of the construction process in metallurgical, power, petroleum, and nuclear industries. In the production process, process pipelines are generally used to maintain the operation and transportation of various materials between equipment. In production, pipelines are generally used to transport media, and these media are generally high temperature, high pressure, flammable, explosive, toxic, and substances. If there is a slight carelessness during transportation, it may cause serious accidents such as leakage or explosion, causing irreparable losses to humans and society. Therefore, for pipelines that cover almost every corner of the factory, it is necessary to strictly ensure the correct installation and construction quality of the pipelines

The installation process of pipelines is complex and involves a wide range of procedures. The requirements for various aspects of the process pipeline, such as material, pressure, temperature, etc., vary according to different production needs. Therefore, the required pipes, fittings, valves, etc. in the production process also vary greatly. Due to the widespread application of stainless steel gear oil pump pipelines in industrial production, their installation quality is particularly important. Therefore, the analysis and research of common problems in pipeline installation in recent years have attracted widespread attention from society. Further discussion and reference are made to the experience and lessons learned from various industries in pipeline installation, in order to strengthen the quality control of gear pump pipeline installation and ensure the normal operation of each part during operation after installation

1) There are various types of pipes, and due to the variety of production processes and techniques, the operating temperature, operating pressure, and the corrosiveness of transportation media in production will also vary.

. Therefore, different production processes may use different pipes. There are various types of pipes, including stainless steel, carbon steel, alloy steel, as well as other non-ferrous and non-metallic pipes. This also makes the types of valves, fittings, and flanges corresponding to it particularly complex during pipeline installation. In order to ensure production efficiency, various materials of pipes are used according to different media and process conditions during the product production process, so as to ensure the normal operation of production

2) Characteristics of the conveying medium: In the production process of the product, there are various types of raw materials used, and they are flammable and explosive.

. Common examples include acetylene gas, coal gas, hydrogen sulfide, hydrogen gas, and methanol. These media may self ignite under temperature conditions or explode in high-temperature environments. At the same time, many products are also toxic. When toxic substances are inhaled or come into contact with people, it can cause poisoning or serious damage to the body, and in severe cases, it may. The corrosiveness of products is also a common characteristic, such as sulfuric acid, nitric acid, and alkali. According to the requirements of the production process, some media in many product production processes need to undergo high temperature and high pressure treatment in order to undergo the chemical reactions required in the production process and obtain the required products

3) The construction quality acceptance standard is relatively high. In order to ensure the smooth operation of the production process based on the different characteristics of the transported raw materials mentioned above, strict requirements are placed on the construction quality of the gear pump pipeline installation during the pipeline installation process, especially the inspection of the pipe mouth weld seam. Welding defects are never allowed to occur to avoid seriously affecting the strength and airtightness of the pipeline.

. Strictly follow the specified inspection standards and acceptance specifications to inspect various types of pipe mouth welds, and also develop construction acceptance specifications to ensure good acceptance of the pipelines. During the installation process of gear pump pipelines, whether for overhead pipelines or buried pipelines, proper handling should be carried out, and the pipelines should be inspected and accepted strictly in accordance with the standard "Code for Construction and Acceptance of Industrial Pipeline Engineering"

[2] Analysis of protective measures for process pipelines in petroleum enterprises

1. Coating protection method

Coating protection method is currently one of the most commonly used methods for underground pipeline corrosion.

. The coating of pipelines is a line of defense against pipeline corrosion. The main function of the coating is to separate the pipeline from the corrosive soil environment it is in. In addition, the coating is also a condition for cathodic protection of the pipeline

2. Anti corrosion Coating

Composite coating and epoxy powder are currently used as anti-corrosion coatings on newly constructed and laid pipelines. The use of traditional anti-corrosion coatings such as petroleum asphalt and coal tar enamel has been significantly reduced, while tape wrapped and liquid coatings are often used in the later maintenance work of pipeline corrosion.

3. Negative protection measures

The so-called negative protection measures refer to an additional protection method for the damaged coating of pipelines laid underground, which can protect the metal of the pipeline at the damaged coating.

. In many construction projects, stainless steel gear oil pump pipelines are subjected to external current cathodic protection, and some projects use sacrificial cathodic protection to achieve cathodic protection. Cathodic protection has matured and has clear industry standards, including design standards and construction specifications, material standards and operation specifications, and so on. The construction difficulty of the cathodic protection method is low, and it does not require a large installation workload. It will not have any impact on the metal structures around the pipeline and has high practical value

In summary, the development of petroleum enterprises requires the support of underground pipelines. Therefore, it is important for relevant personnel in petroleum enterprises to strengthen the analysis of corrosion factors in process pipelines and explore protective measures for process pipelines