Anti corrosion treatment technology for oil pipelines and common problems in pipeline installation

（1） Metal surface treatment technology before pipelines. Currently, the general metal process is to coat the metal surface with corrosive or corrosive materials, separating the metal from the corrosive medium to achieve the goal. In practice, the surface treatment of gear pump pipelines is not done well, and even materials with good performance cannot achieve ideal results. Moreover, almost all materials emphasize surface cleaning before use

1. Chemical Surface Treatment Technology

Oil Removal: The oil on the surface of steel can be divided into saponified oil and non saponified oil according to their properties. Both types of oil are insoluble in water and can only be treated by dissolution, emulsification, electrolysis or mechanical methods. Alkaline chemical oil removal, electrochemical oil removal, and solution oil removal can be used.

Pickling: Pickling for rust removal depends on the properties, surface conditions, and requirements of the metal material. Different pickling solutions and methods are selected. Generally, after the surface of the metal material is degreased, chemical pickling and electrochemical pickling can be used.

Phosphating: placing metals in a dilute solution containing phosphates and soluble phosphates for appropriate treatment, forming an insoluble and well adhered phosphate film on the surface of the metal. This process becomes phosphate or phosphate treatment of the metal, and the phosphate film is mainly used as the bottom layer of the coating

2. Surface spray rust removal technology

The cleaning of the metal surface of stainless steel pump channels generally includes two types: tool rust removal and spray rust removal. Tool rust removal can be divided into manual and power tool rust removal methods.

. Spray blasting for rust removal requires open dry spraying and closed cycle spraying. Due to the presence of residues, surface purification treatment is required after cleaning. Spray rust removal can form anchor lines on the metal surface, increase the surface area of the metal, and correspondingly improve the adhesion between the material and the metal surface

(II) Common Problems in Oil Pipeline Installation

Due to the flammability and explosiveness of oil, the installation of oil gear pump pipelines poses a danger.

. Therefore, strengthening the quality control of the installation of various pipe fittings in pipeline installation systems has become a top research topic for experts, scholars, and industry professionals

1. The production of pipe sections is not standardized; In the design and production of pipeline sections, many construction units do not have strict requirements for construction, resulting in discrepancies between the construction technology of the construction party and the design drawings of the design unit during the installation process of the pipeline sections. After installation, the construction unit ignored the importance of pipeline section testing, blindly installed and underestimated testing, and bought hidden dangers for the normal operation of the entire oil pipeline

2. There are defects in the welding connections of the pipe sections; The construction unit was careless in the welding connection process between pipe sections. The construction personnel welded according to their own great construction experience, without referring to the construction drawings. During the welding process, various welding joints started welding when they were not aligned, resulting in excessive welding gaps and seriously affecting the strength and airtightness of the pipeline

3. Poor installation environment for stainless steel gear oil pump pipelines; Some soils contain a large amount of chemicals such as acids, alkalis, and salts, some of which have a strong corrosive effect on pipeline materials. The construction unit did not inspect the soil around the gear pump pipeline route before installing the oil pipeline, resulting in the risk of corrosion during pipeline installation

4. Blind installation of pipeline valves; Before the installation of the pipeline, the construction unit did not conduct on-site investigation of the installation plan and installed the pipeline valves, which resulted in the valve not being installed and was not conducive to the operation of the pipeline valves

As one of the pillar industries of China's economic development, the petroleum industry must strictly adhere to the quality standards for gear pump pipeline installation in order to avoid potential problems during pipeline installation. After installation, quality inspections should be conducted on each process of the pipeline. Although the installation of oil pipelines is a complex project, it is also an important one. During the installation process, as long as the installation personnel and monitoring personnel do their job well, they should choose high-quality materials for material procurement, and strictly follow the construction procedures and specifications in the installation process. Engineering management personnel should do a good job of supervision and monitoring, deeply implement the installation of oil pipelines, promote the rapid development of China's oil industry, and promote the vigorous progress of the national economy