Size: From 1/2" to 40" / DN15-DN1200 
WT: SCH 20, SCH 40, STD, SCH80, SCH 100, SCH 120. SCH160, XXS 
Standard: ASTM, ASME, JIS, DIN, GB, BS

Material: Carbon steel, Alloy steel, Stainless steel 
Type: Blind flange, slip-on flange, welding neck flange, thread flange, socket welding flange 
Qualification ISO, CE, API 
Surface treatment: Black paint, yellow varnish, rust-proof oil, hot galv. 
Application: Petroleum, chemical, power, gas, metallurgy, construction 
Special design available as requirement