Stainless Steel Plate Flanges, also referred to as flat plate flanges, are simple-structured and cost-effective flange components specifically designed for low-pressure pipeline connections. They are engineered with a focus on practicality, easy installation, and long-term durability, making them well-suited for a wide range of low-pressure industrial and civil pipeline systems, such as water supply, ventilation, and auxiliary pipelines in factories.
The flange body is crafted from high-quality stainless steel, with common grades including 304, 316, and 316L to meet different working environment needs. 304 stainless steel is the most widely used option, boasting excellent rust resistance and basic mechanical strength, which makes it ideal for general low-pressure pipelines transporting non-corrosive or weakly corrosive media like water and compressed air. For harsher environments such as coastal projects or light chemical plants, 316 and 316L stainless steel are preferred due to their enhanced corrosion resistance, which can effectively withstand erosion from weak acids, alkalis, and seawater. All selected materials comply with international standards, ensuring the flanges remain rust-free, non-deformable, and intact during long-term use.
A key structural feature of these flanges is their flat disc design, with evenly distributed bolt holes around the edge of the disc. The smooth and flat surface of the flange ensures tight fitting with matching gaskets (usually asbestos, rubber, or PTFE gaskets), achieving reliable sealing performance to prevent medium leakage. The disc thickness ranges from 6mm to 20mm, and the diameter varies from DN15 to DN600, which can also be customized according to the actual specifications of the pipeline. The bolt holes are processed through precision drilling technology, ensuring accurate positioning and smooth installation, thus avoiding alignment difficulties during on-site construction.
In terms of processing technology, the flanges undergo a series of precision procedures including forging, cutting, and polishing to ensure structural integrity. The surface is treated with pickling and passivation, resulting in a smooth, burr-free finish that not only improves the overall appearance but also enhances corrosion resistance and prevents media accumulation. The connection method is straightforward: the flange is directly attached to the end of the pipeline, aligned with the bolt holes, and fixed with bolts—no complex welding operations are required, which greatly reduces installation time and labor costs.
Regarding performance parameters, the maximum pressure-bearing capacity of stainless steel plate flanges can reach PN10, and the applicable temperature range is from -20℃ to 150℃, fully meeting the operational requirements of low-pressure pipeline systems. Additionally, the flanges are lightweight, making them easy to transport and store, which is particularly suitable for large-scale pipeline laying projects. Meanwhile, the inherent wear resistance and durability of stainless steel ensure a long service life, reducing maintenance frequency and long-term use costs for users.
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