Selection and Installation Selection: When selecting a 90 degree elbow, factors such as the pipeline material, pressure rating, operating temperature, medium characteristics, and connection method need to be considered. Additionally, the appropriate elbow angle and radius elbow should be chosen based on the pipeline layout requirements. Installation: When installing a 90 degee elbow, it is crucial to ensure that the connection with the pipeline is reliably sealed to prevent leakage. For welded elbows, welding quality inspections and acceptance should be conducted. For elbows with other connection methods, operations should be carried out according to the corresponding connection specifications. Maintenance and Servicing Regular Inspections: Regular inspections of 90 degree elbows should be conducted to promptly identify and address potential issues such as cracks and corrosion. Cleaning and Servicing: For pipeline systems prone to clogging or contamination, regular cleaning and servici…