1. Raw Materials This product is made of high-quality 2205 duplex stainless steel (UNS S32205/S31803). Composed of approximately 22% chromium, 5% nickel,3% molybdenum and nitrogen, this material combines the advantages of austenitic and ferritic stainless steels, featuring excellent corrosion resistance, high strength and high toughness.
2. Production Process Production is strictly carried out in accordance with the EN1092-1:2018 standard. The main processes include: raw material inspection and cutting → hot forging or cold forging forming → heat treatment (solution annealing) to optimize duplex microstructure - mechanicalprocessing (turning and drilling) to ensure precise dimensions and surface finish → precision finishing of RF raised face sealing surface → surface treatment (pickling and passivation to remove oxide scales andform a passivation film) → final inspection (dimension check, material testing, pressure test, non → destructive testing, etc.) → marking and packaging.
3. Application Fields It is widely used in industries with stringent requirements for corrosion resistance and strength, such as petrochemical industry, natural gas transmission, marine engineering, shipbuilding, seawater desalination,pulp and paper making, flue gas desulfurization (FGD) systems, and chemical processing. It is especially suitable for harsh environments containing chloride, acidic or alkaline media.
4. Temperature and Pressure Resistance Performance - Temperature resistance range: For continuous operation, the recommended service temperature of 2205 duplex stainless steel is approximately from -50°C to +300°C. It can withstand higher temperatures for short periods, but long-term service above 250°C shall be avoided to prevent brittleness. - Pressure rating: In accordance with the EN1092-1 standard, the maximum allowable working pressure (PS) of PN16 flanges at 20°C is 16 bar. The actual working pressure shall be determined according to the medium temperature, flange material and standard conversion tables. The maximum allowable working pressure decreases as the temperature rises.
Advantages of Hexin Pipe Fitting Co., Ltd.: - Professional manufacturing: Specialized in the research, development and production of pipe fittings and flanges with mature technology andstable product quality. - Standard compliance: Strictly manufactured in accordance with international standards including EN, ASME and ASTM to guarantee product compliance and interchangeability. - Complete material range: Available materials include carbon steel. alloy steel, stainless steel (including duplex steel and super duplex steel),nickel-based alloy and more. - Quality control: Full-process quality control is implemented from raw materials to finished products, equipped with complete testing equipment. - Customization capability: Non-standard customized services are available according to customer drawings and requirements.
Examples of Production Specification Range (subject to actual production capacity of the company): - Nominal Diameter (DN): Generally ranging from DN15 to DN2000 and above. - Pressure Rating (PN): Covering PN6, PN10, PN16, PN25, PN40, PN63,PN100 and other series. - Standard Systems: Capable of producing flanges complying with European (EN), American (ASME), Japanese (JIS), Chinese (GB) and other standard systems. - Materials: Carbon steel (A105, Q235, etc.), stainless steel (304, 316,304L, 316L, 2205, 2507, etc.), alloy steel and other special alloys.
(Note: The above introduction is integrated and supplemented based on the provided parameters and general industry knowledge. For detailed technical parameters of specific products, accurate temperature and pressure resistance data, and the exact production capacity of the company, please directly contact Hebei Hexin Pipe Fitting Co., Ltd. for the latest information.)
