... -neck, Slip-on, Blind, Socket, threaded, Lap-joint, Loose, Flat, Figure-8 Blank, Orifice, etc Dimension Standards and Sizes: GOST 12820 /12821 ... ’s drawing Material: Q235, 20#, A105,SS400,ST37.2 C22.8, P250GH, S235JR, S355J2G3,Q345, 304,304L,316,316L,F60,F62 ...