China API 6A Blind Flange Manufacturer Duwa Piping supply API 6A Type 6BX 10000PSI Blind Flange Type 6BX 10000PSI, with carbon steel, stainless steel, also can supply blind flange pressure rating from 2000psi, 3000psi, 5000psi, 10000psi, 15000psi, 20000psi, type 6b, 6bx.