... flat welding flange Material:A105/Q235,304/304L,316,316L,A182F5,A182F11,.ect. Size:1/2''-60'' Pressure:150lbs-2500lbs flat welding ... flangeMaterial:A105/Q235,304/304L,316,316L,A182F5,A182F11,.ect. Size:1/2''-60'' Pressure:150lbs-2500lbs Facing:RF/FF/Material ... . Itschief merit is that it can be assembled without welding, explaining its use inlow pressure services at ordinary atmospheric ...