Product Introduction
Standard for BL100-2.0RF flange cover
National standard: GB/T9112-2000 (GB9113.1-2000~GB9123 · 4-2000)
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 Flange Standards: HG20592-2009 (PN series) HG20615-2009 (Calss series)
Mechanical Department Standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994
Flange cover, also known as blind flange or blind plate. It is a flange without a hole in the middle, used for sealing pipeline plugs. The function is the same as welding the head and threaded pipe cap, except that the blind flange and threaded pipe cap can be removed at any time, while welding the head does not.