The flange has certain skill requirements and skill parameters in production and application, and is produced and processed according to certain methods and methods:
1. The butt weld of the ring shall be subject to post weld heat treatment and 100% radiographic or ultrasonic flaw detection. The radiographic flaw detection shall meet the class II requirements of JB4730 and the flange ultrasonic flaw detection shall meet the class I requirements of JB4730. Butt welding flanges are produced and processed with certain welding specifications and skills, which meet the corresponding flange production specifications and requirements.
2. The steel plate producing flange shall be subject to ultrasonic flaw detection without layering defect to ensure flange good quality and function. It shall be produced and inspected according to certain quality requirements to ensure that the steel plate flangeproduced and used has no quality problems;
3. The steel flange shall be cut into strips along the rolling direction, bent and butt welded into flange a circular ring, and the surface of the steel flange shall form the cylindrical surface of the flange. In the production of flange, steel plate shall not be directly machined into flange with neck, and certain process of flange shall be selected for manufacturing and processing.
4.Butt welding flanges are produced and processed with certain welding flange specifications and skills, which meet the corresponding flange production specifications and requirements.
