Petrochemical pipeline management strategies and main methods for regulating flow

1、 Research on Quality Management Strategies for Pipeline Engineering

1. Strict Material Management, Engineering Quality

In order for pipeline construction enterprises to do a good job in engineering quality management, the first thing to do is to strengthen the control of construction materials, including basic pipes, fittings, compensators, protective devices, and valves.

. Construction enterprises should carry out inspections in accordance with the Regulations on Special Equipment Inspection, and should adopt equipment that meets the conditions. At the same time, during the physical acceptance, the construction unit should also review the material's certificate of conformity, quality certificate, and performance testing report to see if the components and materials of the equipment meet the standards. For those materials and pipelines that arrive in bulk, the construction enterprise should also conduct selective testing, especially for those critical parts of pipeline equipment. The construction enterprise should strive to carefully inspect and monitor, and strictly test the strength of valves, the quality of pipes and fittings. Through the above measures, only by admitting unqualified products from the source can the construction quality of pipeline engineering be elevated to a higher level

2. Improve the quality management system of pipeline engineering

First, a dedicated responsible group should be established with quality as the center, with the manager of the quality management department as the main person in charge, and a complete department should be formed to ensure the smooth progress of pipeline engineering construction. For example, various leaders of gear pump pipeline engineering construction enterprises, material and equipment procurement leaders, technical quality leaders, construction safety supervision leaders, etc., the responsibilities and work content of each position and construction personnel should be clearly defined, and the engineering quality management position responsibility system should be implemented, so that quality management can be systematically implemented.

. In addition, it is necessary to establish an enterprise quality management team to regularly inspect and supervise the quality management work of the enterprise, timely discover and clean up hidden dangers in the quality management of the enterprise. If production problems are found, the department should cooperate to develop rectification strategies, and implement the responsibility of rectification work to individuals, so as to smoothly carry out the quality management work of the stainless steel oil pump pipeline construction enterprise

3. Pipeline Maintenance Management

Pipeline maintenance management is an important prerequisite for doing a good job in pipeline maintenance management. Therefore, construction enterprises should strive to start from the following aspects.

. Firstly, construction companies should allocate specialized management personnel based on the actual situation of gear pump pipeline maintenance and management, and strengthen training for management personnel to enhance their management awareness. In addition, management personnel should regularly conduct self inspections based on the actual situation of pipeline management. If any abnormal situations are found, they should be reported in a timely manner and handled properly. Secondly, establish a sound patrol inspection system, conduct regular inspections and maintenance of pipeline auxiliary instruments and measurement and control devices, and keep corresponding records of actual maintenance management to effectively carry out pipeline maintenance and management work. On the other hand, construction enterprises should also strictly operate and manage, strengthen training for operation and management personnel, follow rules and regulations as well as management processes, and strictly operate and manage

2. Main Methods for Adjusting Flow of Stainless Steel Gear Pump

The flow of stainless steel gear pump can be adjusted by changing the characteristic curve of the stainless steel gear pump pipeline, adjusting the series and parallel connection of the pump, adjusting the pipeline valve, adjusting the installation height of the gear pump, and adjusting the pipeline diameter of the stainless steel gear pump.

The main method for adjusting the flow rate of stainless steel gear pumps

1. Changing the pipeline characteristic curve

The simple method for changing the flow rate of stainless steel gear pumps is to use the opening of the pump outlet valve to control it. Its essence is to change the position of the pipeline characteristic curve to change the working point of the pump.

2. Changing the characteristic curve of stainless steel gear pumps

According to the laws of proportion and cutting, changing the pump speed and changing the pump structure (such as cutting the outer diameter of the impeller method) can both change the characteristic curve of stainless steel gear pumps, thereby achieving the goal of regulating flow (while changing the pressure head).

. However, for pumps that are already in operation, the method of changing the pump structure is not very convenient, and because the pump structure is changed, the versatility of the pump is reduced. Although it is economically convenient to adjust the flow rate at certain times, it is rarely used in production. Here we will only analyze the method of adjusting the flow rate by changing the speed of the stainless steel gear pump. When adjusting the pump speed to decrease the flow rate from Q1 to Q2, the pump speed (or motor speed) decreases from n1 to n2. The characteristic curve Q-H of the pump at n2 intersects with the pipeline characteristic curve He=H0+G1Qe2 (the pipeline characteristic curve remains unchanged) at point A3 (Q2, H3). Point A3 is the new operating point after adjusting the flow rate through speed regulation. This adjustment method can extend the service life of the pump, save electricity, and lower the speed of operation, which can also reduce the NPSHr of the stainless steel gear pump, keep the pump away from the cavitation zone, and reduce the possibility of cavitation in the stainless steel gear pump. The disadvantage is that changing the speed of the pump requires variable frequency technology to change the speed of the prime mover (usually a {HotTag} motor), which is complex in principle, requires a large investment, and has a small range of flow regulation

3. Series and parallel adjustment methods for pumps

When a single stainless steel gear pump cannot meet the conveying task, parallel or series operation of stainless steel gear pumps can be used.

. Using two stainless steel gear pumps of the same model in parallel, although the pressure head does not change much, it increases the total conveying flow rate, and the overall efficiency of the parallel pumps is the same as that of a single pump; When the stainless steel gear pump is connected in series, the total pressure head increases and the flow rate does not change much. The total efficiency of the connected pump is the same as that of a single pump