Diameter pipe welding, Hebei Guotai production welding diameter pipe, welded diameter pipe manufacturers provided by Hebei Cathay. Diameter pipe welding, Hebei Guotai production welding diameter pipe, welded pipe diameter pipeline equipment manufacturer Hebei Guotai Co. (www.hbgtgd.com) 2014 upgrade been newly launched necking diameter pipe forming process is the exclusive diameter equal to the diameter of the big end of the tube into the mold of stainless steel tube welded diameter pipe, tube by pressing along the axial direction of the metal movement and contraction along the cavity forming. Depending on the size diameter pipe reducers, divided into one or more press-forming press forming. Below concentric reducer reduced diameter forming schematic. Expanding the use of molding is less than the diameter of the big end of the tube diameter pipe with an inner diameter of the die along the tube flaring forming. Expanding process is mainly to solve the larger diameter pipe reducer difficult situation by forming necking, and sometimes need to materials and products shaping the expanding and necking methods combined. Seamless size of the head of production: head size (diameter pipe) is a pipe for pipe reducers Department. Forming process commonly used to necking repression, expanding repression or suppression of necking plus expanding on some of the specifications of the reducers may also be stamping. Reduced diameter / size of the enlarged diameter head shaped molding process is reduced in diameter and the large end diameter equal to the size of the first tube into the mold, and by pressing the tube along the axial direction of movement of the metal and the contraction along the molding cavity . Depending on the size diameter pipe reducers, divided into one or more press-forming press forming. b. stamping addition to using steel as raw materials to produce the size of the head outside diameter welded pipe manufacturers, some of the specifications on the size of the head can also use steel using stamping process for production. Die shape stretching the size of the head using a reference surface sized stainless steel welded pipe prices diameter, with the steel stamping die cutting after stretch forming. We always adhere to the operating principle of good faith, with a wealth of experience in technology welding diameter pipe, sound management philosophy, strong reserve force and continuous improvement of the production process, so Cathay pipeline products to the international market. Welcome to the new and old customers to visit and negotiate.