stainless steel flange

Stainless steel tube sheets are components used in heat exchangers, condensers, and other applications that require efficient heat transfer. It is a circular plate with precision drilling, used to accommodate tubes in the bundle. The tube sheet is used as a support structure and compression component, and provides a safe attachment for the tubes.     Chemical Component of Stainless Steel The main chemical component of stainless steel is chromium, which reacts with oxygen to form a dense oxide film, which has heat resistance and prevents further corrosion of the metal. This allows stainless steel tube sheets to be used for a long time in various harsh environments. Stainless steel, due to its unique microstructure, has high tensile strength and ductility, ensuring that the tubesheet is not easily deformed or fractured under external forces. Especially in high and low temperature environments, stainless steel can still maintain good mechanical properties and is not easily brittle.       The advantages of stainless steel tubesheets Stainless steel has become the preferred material for tubesheets due to its excellent corrosion resistance. It has rust prevention, oxidation resistance, and anti fouling properties, suitable for high temperature and corrosive environments. Stainless steel tube sheets are commonly used in industries such as petroleum and natural gas, chemical processing, power generation, and HVAC. Stainless steel tube plates have good hygiene performance. Due to its smooth surface and no pores, stainless steel materials are not easy to breed bacteria and microorganisms, and are easy to clean and disinfect, meeting hygiene standards. Therefore, stainless steel tube plates are widely used in medical, food processing and other industries, such as surgical instruments, food equipment, etc. In addition, stainless steel tube sheets have sustainability. Stainless steel materials can be recycled and can be melted again to produce new products, reducing resource waste. Meanwhile, stainless steel materials have a long service life, are not easily damaged, reduce the frequency of maintenance and replacement, and have good economic and environmental benefits.     How to manufacture Stainless steel tube plates Stainless steel tube plates are manufactured using various methods, including mechanical processing, drilling, and welding. Precision drilling ensures precise alignment of pipelines, thereby achieving efficient heat transfer. Welding is commonly used to secure pipes to pipe sheets, providing reliable and leak free joints. Wuxi Changrun has absolute equipment strength in tube sheet processing services. At present, the heavy-duty precision workshop has 11 large deep hole drilling equipment and 31 CNC flat drilling equipment, as well as a series of advanced domestic and foreign supporting equipment with high precision, full specifications, and multiple functions. It can provide machining services such as turning, milling, boring, and drilling. There are also advanced equipment such as cutting and welding involved in the previous process.     The selection of stainless steel for tube plates depends on factors such as operating conditions, temperature, and the corrosiveness of the treated fluid. The common grades of stainless steel used in tube sheets include austenitic stainless steel (such as 304 and 316), duplex stainless steel, and ultra duplex stainless steel. These grades combine corrosion resistance, mechanical strength, and thermal conductivity. In summary, stainless steel tube sheets are key components of heat exchangers and condensers. It provides support for pipelines, promotes effective heat transfer, and provides excellent corrosion resistance under harsh operating conditions. The use of stainless steel tube sheets ensures the lifespan, reliability, and performance of heat transfer equipment in a wide range of industrial applications.

Flammable and explosive high-pressure pipelines in petrochemical industry require weld neck flanges Petrochemical pressure pipeline components are used to connect or assemble pressure bearing and sealed pipeline system components, including pipes, fittings, flanges, gaskets, fasteners, valves, joints, hoses, traps, filters, separators, etc. Among them, flammable and explosive high-pressure pipelines require forged weld neck flanges.   Seals for flammable and explosive high-pressure pipelines in petrochemical industry include flange sealing surfaces, flange gaskets, and fasteners. The flange sealing surface forms include flat face (FF), raised face (RF), ring joint face (RTJ), tenon groove, special groove, etc. The flange gasket includes flat gasket, spiral wound gasket (with inner and outer rings), and metal gasket (oval, octagonal).     High quality butt welded flanges should meet the following requirements: 1.No defects such as cracks, shrinkage, slag inclusion, and cold-lap; 2.The depth of rust, dents, and other mechanical damage should not exceed the negative deviation of wall thickness allowed by the product standard; 3.The machining accuracy and roughness of threads, sealing surfaces, and grooves should meet the requirements of the design documents or product standards; 4.The weld seam should be well formed and smoothly transition to the base metal, without defects such as cracks, lack of fusion, and incomplete penetration; 5. Metal bellows expansion joints, spring supports and hangers, and other shipping parts or positioning pin blocks should be complete and free of looseness.       The compliance of flanges, blind flanges, and stub end can be determined through the following visual inspections: a) The sealing surface should be flat and free of rust and radial scratches; b) The outer edge of the flange and flange cover should have a permission mark; c) The product standard number, nominal size, nominal pressure, material, and sealing surface type code should match the quality certificate.       Standard class rating of flanges According to the different nominal pressure ratings of valves, flanges with different pressure ratings are configured in pipeline flanges. Several commonly used flange pressure ratings are classified according to international standards According to ASME B16.5, steel flanges have 7 pressure ratings: Class150-300-400-600-900-1500-2500 (corresponding to Chinese standard flanges with PN0.6, PN1.0, PN1.6, PN2.5, PN4.0, PN6.4, PN10, PN16, PN25, PN32Mpa ratings)