... : plate, slip on, welding neck, blind, thread, socket weld flangeProcess: free forging, plate cutting, heat treat, machiningSurface Treat: ... receiving the formal orderCarbon Steel:A105,SS400,SF440,RST37.2,S235,C22.8Stainless Steel:F304,F304L,F316,F316L, ... contact me for flange price. 1.DIN carbon steel flangesMaterial:Rst37.2,St37.2,C22.8)DIN2573 PN6 ... from 1/2(DN15) to 48(DN1200) steel pipe collar