The non-standard flange is placed between two flange sealing surfaces. After tightening the nut, the pressure on the gasket surface reaches a certain value and deforms, filling the uneven areas on the sealing surface to ensure a tight and leak free connection. There are three types of flange sealing surfaces: flat sealing surfaces, suitable for situations with low pressure and non-toxic media; Concave convex sealing surface, suitable for situations with slightly higher pressure; Mortise and tenon sealing surface, suitable for flammable, explosive, toxic media and high-pressure environments.

Product Name: Stainless steel non-standard flange, butt welding flange, reducing flange

PN0.25-PN42.0

Common standards:

National standard: GB/T9112-2010 (GB9113 · 1-2010~GB9123? 4-2010)

Standardization: HG20592-2009

American standard: ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)

日标： JIS 5K、10K、16K、20K（PL、SO、BL、WN、TH、SW）

German Standard: DIN2573、2572、2631、2576、2632、2633、2543、2634、2545（PL、SO、WN、BL、TH）

Ministry of Chemical Industry standards: HG5010-52~HG5028-58, HGJ44-91~HGJ65-91, HG20592-97 series, HG20615-97 series

Mechanical Department Standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994

Pressure vessel standards: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000