... ,F11),stainless steel (304,316); 2)Size: from 1/2"to64"; 3)standard: long welding neck flange1)Material: carbon steel(A105,Q235 ... ,A305),alloy(F5,F9,F11),stainless steel (304,316);2)Size: from 1 ... reputation in global market with high quality and competitive price. Long welding neck flange