EN Welding Neck Flanges supplier The outer slope of the neck of the butt-welded flange should not be greater than 7o. Welding flanges strictly control technical parameters during production and welding to ensure that they can give full play to their role and value in production and use. Product Properties Butt welding flanges are generally made by forging or forging and rolling. When made of steel plate or section steel, the following requirements must be met: 銆€ 1. Butt-welded flanges should be ultrasonically inspected, and there should be no delamination defects; 銆€ 2. It should be cut into strips along the rolling direction of the steel, then be bent but welded into a ring, and the surface of the steel should be formed into a cylindrical surface of the ring. The steel plate shall not be directly machined into a butt-welded flange with neck; 銆€ 3. Full penetration welds should be adopted for the butt weld of the ring; 銆€ 4. The butt weld of the ring should be subjected to post-weld heat treatment and 100% radiographic or ultrasonic inspection, and the radiographic inspection meets the level II requirements of JB4730, and the ultrasonic inspection meets the level I requirements of JB4730. Packing and shippingEN Welding Neck Flanges supplier website:http://www.huashuoflange.com/welding-neck-flanges/en-welding-neck-flanges/