Flat welding flange should be cut along the direction

　　Flat welding flange should be cut along the direction of the steel rolling strip, the bending system welded into a ring-shaped, and the steel surface of the surface of the cylinder. Flat welding flange in the production of steel plates can not be directly processed into a neck flange, using a certain process of production and processing. Flat plate welding production of flat steel plate should be ultrasonic testing, non-hierarchical defects to ensure good quality and performance problems, in accordance with a certain quality requirements of production and testing to ensure that the production and use of steel without any quality problems.