What are the maintenance measures for butt fusion reducer

In modern industrial environments, standardized operating procedures for daily inspections are essential to ensure the safety and reliability of equipment. To this end, operators must be equipped with professional inspection tool kits, which should include advanced instruments such as infrared thermal imagers, ultrasonic thickness gauges and portable hardness testers. During the inspection, the operator must first observe the appearance of the joint comprehensively, focusing on whether there are stress cracks, corrosion spots and deformation marks. If the surface temperature of the joint is found to be abnormally high and exceeds the ambient temperature by 20°C, the special inspection procedure should be started immediately. The wall thickness of the joint is measured by an ultrasonic thickness gauge and compared with the original data to determine whether there is uniform corrosion. When the local thinning exceeds 10% of the original wall thickness, a detailed mapping of the wall thickness distribution should be carried out so that corresponding maintenance measures can be taken in time.

In terms of cleaning and maintenance, a graded treatment mechanism is recommended. For pipeline systems that transport drinking water, the joint surface needs to be rinsed with deionized water every quarter, and a soft brush is used to remove sediments. For pipelines that transport industrial media, special cleaning plans need to be formulated according to the characteristics of the media. For example, for pipelines containing sulfur-containing media, a special corrosion inhibitor solution should be used for immersion cleaning. After cleaning, use compressed air to dry the inside of the pipe and apply food-grade silicone oil to form a protective film to prevent subsequent corrosion. For underground pipelines, it is recommended to conduct excavation inspections every two years, especially to evaluate the anti-corrosion layer of the joints. If damage is found, polyethylene heat shrink tape should be used in time to patch the joints to ensure the overall protection performance of the pipeline.

Regular inspections should use a multi-technical integration solution to improve the accuracy and comprehensiveness of the inspection. In terms of macro inspection, a drone equipped with a high-definition camera can be used for 360° panoramic shooting, focusing on identifying joint displacement and flange connection abnormalities. In non-destructive testing technology, magnetic particle inspection technology is recommended for joints with a diameter of less than 400mm, while for joints with a diameter of more than 400mm, radiographic inspection is required, and the inspection ratio should meet the requirements of GB/T 29460 standard. For pipeline systems that have been in operation for more than 10 years, it is recommended to conduct phased array ultrasonic testing (PAUT) once a year. This technology can accurately identify the depth and direction of cracks inside the joint, thereby providing a scientific basis for subsequent maintenance decisions.

In terms of environmental monitoring, a dynamic assessment system needs to be established. Especially in coastal high salt fog areas, the amount of chloride ion deposition on the joint surface should be tested quarterly. When the amount of chloride ion deposition exceeds 50mg/m², timely rust removal is required. In earthquake-prone areas, it is recommended to install acceleration sensors to monitor the vibration of the pipeline. When the vibration acceleration exceeds 0.1g, the fatigue damage degree of the joint should be evaluated. In addition, for pipelines crossing roads and railways, it is recommended to regularly use ground penetrating radar to scan the joint position to prevent damage caused by third-party construction.

In the maintenance of special working conditions, special plans should be formulated. For pipelines conveying high-temperature media, it is recommended to check the working status of the joint thermal stress compensator every six months and use strain gauges to measure the residual stress of the joint. When the residual stress exceeds 30% of the material yield strength, stress release treatment should be carried out in time. For pipelines conveying corrosive media, it is recommended to test the pH value and ion concentration of the medium every month. If abnormal parameters are found, the sacrificial anode at the joint should be replaced immediately. In addition, for large-diameter pipes (DN ≥ 800mm), it is recommended to conduct a water pressure test every three years, and the test pressure should be 1.25 times the design pressure to ensure the safety and stability of the pipeline system.