Manufacturer of steel pipe flanges, steel flanges manufacturer went to Hebei Thai Extension Pipeline Consortium flange branch I plant is the strongest steel pipe flange manufacturers in the industry have high visibility, I Companies from raw materials to guarantee the quality of products, each one flange products are strict quality inspection to the factory, to achieve true zero return record sales, in the hope that each of our customers to give us a chance, we are confident that you become our long-term partner, flat welding flange has in the production and use of certain technical requirements and specifications, production and processing in accordance with certain ways and methods: 1. Production of steel welded flange shall be subject to ultrasonic testing, no delamination defects, to ensure good quality and performance issues, according to certain quality requirements and inspection to ensure the production and use of steel no quality problems; 2. Should be cut into strips along the rolling direction of steel, by bending butt an annular shape, form and surface of a steel cylinder ring. In the production of steel plate welded flange may not be directly machined into the flange with a neck, the use of certain production and processing technology. 3. The welded flange welding requires the use of certain welding processes, butt weld ring should be full penetration welds; 4. circle of butt welds should weld heat treatment, and for 100% ray or ultrasonic inspection and in line with JB4730 ray inspection level II requirements, ultrasonic testing in line with the requirements of Class I JB4730's. Butt welding flange using certain criteria and techniques of production, in line with the corresponding production standards and requirements of the country. Welded flange generally referred to as flat, also known as lap welding flanges. Welded flange connection with the pipe flange is first inserted into the bore of the tube to the appropriate location, and then take the welding. Flat welding flange for nominal pressure of not more than 2.5MPa pipe connection. Flat welding flange sealing surface can be made smooth style, bump-type and tenon slot three. Smooth application of the maximum level of welding flange. used for medium conditions are mild cases, such as low pressure non-compressed air purification, low circulating water. .