Pre – and post installation process of stainless steel seamless elbow
The installation process of stainless steel seamless elbows includes strict preparation work, standardized operating procedures, and subsequent maintenance.
Before installation, it is necessary to check the specifications of the elbow, such as the nominal diameter and material, to ensure that the pipeline contact surface is clean and free of oil stains, oxides, or mechanical damage. This requires the use of a beveling machine to treat the pipe mouth smoothness to meet the SA2.5 standard, and in key projects, use a magnifying glass to inspect the weld area for pores or cracks.
During the installation process, according to the connection method (welding, threading, or clamping), the interlayer temperature should be controlled within the range of 550-600 ℃ during welding to avoid welding defects caused by excessive or insufficient temperature. Three dimensional laser positioning should be used to accurately align the elbow angle to ensure that the elbow cutting angle is consistent with the pipeline layout.
For welded connections, X-ray inspection or sealing test must be conducted after welding. For high-pressure systems, a pressure test of 20MPa is required for 3 hours to confirm no leakage; Threaded connections require regular anti loosening treatment to prevent loosening caused by vibration; The installation position should consider the convenience of operation. At least 5mm expansion gap should be reserved in the horizontal section, and the vertical pipe should be fixed with three-point clamping fixtures. The bearing capacity of the hanger should be twice the working load.
After installation, immediately perform a pressure test and hold at 1.5 times the working pressure for 30 minutes to verify the system’s sealing.
During the maintenance phase, infrared temperature measurement should be used quarterly to monitor local temperature differences. If it exceeds 5 ℃, potential problems should be identified, and the integrity of the joint structure should be evaluated regularly through DR imaging or ultrasonic testing. If wall thickness reduction exceeds 25%, timely reinforcement should be carried out, and insulation or electric tracing devices should be installed in low-temperature environments.
The entire process should avoid the corrosion of metal by residual chemical cleaning solution and prohibit high-pressure water guns from directly hitting precision structures.
Pre – and post installation process of stainless steel seamless elbow
The installation process of stainless steel seamless elbows includes strict preparation work, standardized operating procedures, and subsequent maintenance.
Before installation, it is necessary to check the specifications of the elbow, such as the nominal diameter and material, to ensure that the pipeline contact surface is clean and free of oil stains, oxides, or mechanical damage. This requires the use of a beveling machine to treat the pipe mouth smoothness to meet the SA2.5 standard, and in key projects, use a magnifying glass to inspect the weld area for pores or cracks.
During the installation process, according to the connection method (welding, threading, or clamping), the interlayer temperature should be controlled within the range of 550-600 ℃ during welding to avoid welding defects caused by excessive or insufficient temperature. Three dimensional laser positioning should be used to accurately align the elbow angle to ensure that the elbow cutting angle is consistent with the pipeline layout.
For welded connections, X-ray inspection or sealing test must be conducted after welding. For high-pressure systems, a pressure test of 20MPa is required for 3 hours to confirm no leakage; Threaded connections require regular anti loosening treatment to prevent loosening caused by vibration; The installation position should consider the convenience of operation. At least 5mm expansion gap should be reserved in the horizontal section, and the vertical pipe should be fixed with three-point clamping fixtures. The bearing capacity of the hanger should be twice the working load.
After installation, immediately perform a pressure test and hold at 1.5 times the working pressure for 30 minutes to verify the system’s sealing.
During the maintenance phase, infrared temperature measurement should be used quarterly to monitor local temperature differences. If it exceeds 5 ℃, potential problems should be identified, and the integrity of the joint structure should be evaluated regularly through DR imaging or ultrasonic testing. If wall thickness reduction exceeds 25%, timely reinforcement should be carried out, and insulation or electric tracing devices should be installed in low-temperature environments.
The entire process should avoid the corrosion of metal by residual chemical cleaning solution and prohibit high-pressure water guns from directly hitting precision structures.