304 / 316L stainless steel reducer

Stainless steel big and small head is also called big and small head. One of two kinds of stainless steel pipe fittings with different pipe diameters. It is divided into concentric reducer and eccentric reducer. Materials include stainless steel reducer (304304l316l), alloy steel, carbon steel head, 20 steel Q235, Q345, etc.

Standards of the Ministry of electric power gd0506 ~ 0507, corresponding standards for supporting flanges and Tubesheets of pressure vessels: JB / t4700 ~ 4707-2000 national standards (GB / t9112-2000), standards of the Ministry of machinery (JB / t81-1959, JB / t74-1994), standards of the Ministry of petrochemical industry (sh3406-1996), standards of the Ministry of chemical industry (Hg / t5010-1958, Hg / t20592-2009), etc. The material of forged steel flange for export shall comply with American astma105 standard.

Production: reducer is a kind of pipe fitting used for pipe reducing. The commonly used forming processes include diameter reduction pressing, diameter expansion pressing or diameter reduction and diameter expansion pressing, and the reducer of some specifications can also be formed by stamping.

a. Reducing / expanding forming

The reduction forming process of large and small head is to put the tube blank with the same diameter as the large end of the large and small head into the forming die and press it along the axial direction of the tube blank to make the metal move along the die cavity and shrink. According to the size of reducer reducer reducer, it can be divided into one-time press molding or multiple press molding.

There are many connection modes for stainless steel big and small heads. The common types of pipe fittings are compression type, compression type, union type, push type, push thread type, socket welding type, union flange connection, welding type, welding and traditional connection. Combined derivative series method. These connection modes have different application ranges according to different principles, but most of them are easy to install, firm and reliable. The sealing ring or gasket materials used for connection mostly adopt silicone rubber, nitrile rubber and EPDM that meet the requirements of national standards, so as to avoid the worries of users.

Connection mode and principle of stainless steel large and small heads: there are many connection modes of stainless steel large and small heads, including compression, compression, union, push and socket welding, union flange connection, welding and welding conventional connection, welding and derivative series connection mode combining welding and conventional connection. Generally, in construction machinery, the big three links have the characteristics of large diameter, thin wall, poor rigidity, smoothness and beauty. Buckling forming method: there are three common methods. One method is called stretching method and the other is called stamping method. There are 3-4 rolls, 2 fixed rolls and 1 commissioning roll. Adjust the fixed roll distance. The finished pipe fittings are buckled. Other substances that can cause transparency problems include semiconductor materials silicon, gallium arsenide, some coatings, some optical materials such as silver chloride, sapphire, quartz, sodium chloride, germanium, and many special crystal products.