Problems in Oil Pipeline Construction and Response to Pipeline Installation Issues

≪ One> Construction problems of oil pipelines

Pipeline construction is a core part of oil construction engineering. Therefore, relevant personnel should strengthen the quality management of pipeline construction in practical operations. If the construction quality of gear oil pump pipelines is not high, it will not only hinder the operation of pipelines, but also pose a threat to people's lives, property, and social stability and development.

. It is evident that managing the quality of pipeline construction is of great importance. This article mainly starts with the construction problems of oil pipelines and proposes measures to improve the quality management level of oil pipeline construction

1. Problems in the design of gear oil pump pipeline circuits

Some owners often fail to hire a design institute to design axonometric drawings of pipelines in order to save some investment costs.

. Usually, it is entrusted to the construction unit or manually drawn single line diagrams. Some projects, due to tight construction schedules, lack sufficient design time, and heavy tasks, have caused obstacles to pipeline construction

2. Insufficient technical strength

With the opening up of the construction market, many large-scale petroleum enterprises have come to China for development, requiring a large number of talents and offering high salaries. This has led to a serious loss of talent and insufficient number of technical personnel in the country's petroleum construction enterprises.

. Before the construction of some engineering projects, the technical personnel did not strictly establish the corresponding construction plan according to the design requirements, engineering characteristics, and on-site conditions, and did not do a detailed technical briefing with the construction team, which will affect the quality of gear pump pipeline construction. Some construction units hire non welding personnel to the site for welding during practical operations, resulting in low welding quality levels

3. Lack of Quality Management Awareness in Construction Units

Some petroleum construction pipeline construction units have insufficient technical personnel, coupled with a lack of high quality management awareness, which makes it impossible to fully utilize pipeline construction technology and management concepts, such as single line diagram management, welding technology management, etc., without innovative management models, they still use the previous model, and the management level presented later on does not meet the current requirements for pipeline construction.

4. Material management needs improvement

There are various forms of materials used for pipelines in petroleum construction projects. If the material quality management is not done well enough, it will lead to many quality problems.

. In some construction sites, material management often involves untimely transplantation of color codes for pipes and fittings, resulting in all materials being mixed together, which to some extent affects the construction quality of pipelines; In the actual welding process, there are various types of welding materials in some construction sites, and the intensity of baking, distributing, and recycling management of welding materials is not enough. It is impossible to carry out follow-up management activities, recover the remaining materials in a timely manner, or do not strictly follow relevant regulations for drying work, and there is no standard and reasonable use of welding rod barrels. These shortcomings will threaten the welding quality of pipelines

< II Response to problems in pipeline installation

1) Before construction, it is necessary to understand the requirements of the construction unit in various aspects such as health and environment, strictly follow the existing laws and regulations in China, and ensure compliance and legality throughout the entire process of gear oil pump pipeline installation and construction. At the same time, it is necessary to prepare for construction technology. Pipeline construction technicians, inspectors, and management personnel should be familiar with the main content and production process of pipeline construction engineering, and prepare for construction technology in advance. Secondly, the layout work of the construction site should be done in advance according to the requirements of the pipeline installation process, and preparations should be made for setting up the management workshop and its ancillary facilities, and the disposal of engineering waste and fire protection facilities during the construction process should be reasonably arranged. During the entire pipeline installation and construction process, it is inevitable to use a large amount of installation equipment, and some of them may be necessary. Therefore, the quality of installation equipment directly affects the installation quality of gear pump pipelines and their properties. Purchasing these equipment in the early stage of construction requires a significant amount of funds. Therefore, it is necessary to prepare relevant documents such as procurement contracts in advance to avoid delaying the construction progress in case of contract disputes. It is also necessary to prepare construction equipment, tools, and materials. Equip sufficient construction equipment and tools according to the engineering needs, and strengthen the acceptance, management, and distribution of piping construction materials. Assign dedicated personnel for maintenance and management. Ensure that acceptance registration, classification storage, dedicated personnel custody, and distribution are carried out according to the actual situation

2) General requirements for the installation of gear pump pipelines. During the pipeline installation construction process, it is necessary to strictly follow the coordinates, elevations, and slopes specified in the drawings to accurately carry out the work, in order to achieve the effect of horizontal and vertical alignment. The pipeline installation construction procedure should generally follow the basic construction principles of high pressure followed by low pressure, from top to bottom, from complex to simple, from large to small, and from underground to above ground. The flange joint surface used in the construction process should pay attention to ensuring that the gasket is uniformly stressed.

. During the construction process, the threads connecting bolts and nuts are generally coated with a mixture of platinum disulfide or grease to prevent rust on the threads of bolts and nuts. At the same time, attention should also be paid to the installation of pipelines connected to rotating equipment, such as pumps, compressors, etc. Ensure that the pipeline after construction does not cause excessive stress on the equipment, and that the free alignment, concentricity, and parallelism of the equipment meet the requirements after construction is completed. The installation of instrument components on the process pipeline should be carried out after the completion of the pipeline system pressure testing and blowing process. At the same time, attention should also be paid to protecting instrument fittings from damage during this process. During the pipeline installation process, it is necessary to adjust and fix the support and hanger in a timely manner. The fixed bracket should be installed strictly according to the design requirements. The position of the support and hanger should be accurate during the construction process, and the installation should be firm, flat, and in good contact with the pipe position. During the thermal load test run, the supports and hangers should be inspected and adjusted at any time. For the spring installation height of the spring support hanger, it should be adjusted according to the installation design requirements and detailed records should be made

3) The installation process often encounters problems. With the development of the industry, China has continuously strengthened the level of installation of gear oil pump pipelines. However, we clearly see that there are still some units that only focus on immediate interests and ignore problems.

. This brings hidden dangers to production. For example, the technical level of construction personnel is not high, relevant rules and regulations are not perfect, and the system is not sound. Various problems often arise with the materials used for pipelines, such as substandard quality of pipes and fittings used for installation, inconsistent specifications and models of pipes and flanges with quality certificates, and inadequate heat treatment status of some stainless steel fittings. Pipeline welding is also a common problem, such as not paying attention to welding technology during the welding process, technical personnel not strictly adhering to welding technology requirements, and not selecting appropriate welding processes based on pipeline materials, resulting in poor weld formation, which seriously affects the quality requirements of engineering construction and shortens the service life

4) Preventive measures during the installation process. In response to the common problems that occur during the installation of gear pump pipelines, we should take relevant preventive measures. Firstly, the material, specifications, and model of the pipes used during the installation process must match the quality certificate. Installation construction can only proceed after the materials meet the construction requirements. Before installing the pipeline, it is necessary to carefully inspect all components to ensure the stability of the brackets, and to ensure that instruments, valves, and their accessories are installed correctly. Before welding the pipeline, the groove and its surrounding surface should be cleaned. Strictly follow the specifications to perform pre weld preheating and post weld heat treatment on pipes and fittings. And choose the appropriate welding process, only in this way can the quality of the pipeline be improved. Relevant departments also need to further improve the pipeline supervision system and clarify responsibilities. Strengthen the inspection of pipeline quality, and severely punish those who seriously violate regulations in accordance with the law

In recent years, with the development of industry pipeline construction in China, pipeline installation is a complex system engineering. The problems and serious threats to people's property and life during the construction and installation of gear pump pipelines have become increasingly prominent. Therefore, strict requirements for construction quality are of great significance