In-depth Market Analysis of Large-Diameter Carbon Steel Flanges
Release Date:
2016-10-15
Stainless steel flanges are commonly used in pipeline construction projects due to their high strength, stable performance, resistance to corrosion, and excellent durability. Stainless steel flanges do not necessarily require stainless steel bolts; however, stainless steel bolts are often chosen for ease of disassembly (since carbon steel bolts tend to rust). They may also be selected in applications where hot work is prohibited or in other special circumstances. The material of the bolts is independent of the flange material. In the European system, standards such as HG 20613-97 “Fasteners for Steel Pipe Flanges (European System)” and HG 20614-97 “Selection of Gaskets and Fasteners for Steel Pipe Flanges (European System)” apply. In the American system, standards like HG 20634-97 “Steel Pipe Flanges” are referenced.
Stainless steel flanges are commonly used in pipeline construction projects, offering high strength, stable performance, excellent corrosion resistance, and superior durability.
Stainless steel flanges do not necessarily require stainless steel bolts; stainless steel bolts are chosen for ease of disassembly (since carbon steel is prone to rusting), and they may also be used in applications where hot work is prohibited or in other special circumstances. The material of the bolts is independent of the flange material. In the European system, selection follows HG 20613‑97 “Fasteners for Steel Pipe Flanges (European System)” and HG 20614‑97 “Selection of Gaskets and Fasteners for Steel Pipe Flanges (European System)”; in the American system, it adheres to HG 20634‑97 “Fasteners for Steel Pipe Flanges (American System)” and HG 20635‑97 “Selection of Gaskets and Fasteners for Steel Pipe Flanges (American System).” For stainless steel flanges, a dedicated grade such as 35CrMoA typically suffices to meet the requirements.
It is widely used in industrial automatic control systems across industries such as food processing, environmental protection, light industry, petroleum, papermaking, chemical engineering, and power generation.
Due to insufficient forging pressure or holding time, the forged flange is subjected to free crystallization conditions, resulting in shrinkage cavities. Moreover, a high gas content during forging causes evolved gases to enter these cavities, and the matrix surrounding the cavities often exhibits numerous cracks. Therefore, to prevent these defects in flanges, it is crucial to select appropriate forging pressure and holding time.
Changzhou Wujin No. 2 Flange Forging Co., Ltd. specializes in the production of large-diameter flanges.
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