... dismantling for inspection and cleaning and where the ability to swivel flanges and to align bolt holes materially simplifies the erection of large ... .2,Flanges are the connectors used in process piping to connect pipe to tees, elbows, valves, pumps and whatever other equipment may ... ) Customers' drawings for special use4) Sizes we can produce: DN10 to DN30005) Types we can supply: WN, SO, BL, plate, ...