produce according draw good quality durable Flanges of welding neck, socket welding, threaded, blind, slip ... . Size:1/2-78 inch (DN15-DN2000)4. Material:Carbon steel: A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.85. Surface ... time:Within 30days for 1000tons10.Supply Capacity: 10000tons per year steel c profile