F53 flange 1Stainless steel flange 2.Material:Stainless steel 3.Certification:ISO9001:2008,TUV 2010, PED20 F53 flangeMainMaterialStainless steel,Carbon steel,Alloy steelWN/BL/PL/SO/SW/THANSIANSI B16.5 B16.47 API-605,6A,6B,MSS Sp44, AWWA S207DINDIN2527,DIN2566,DIN2573,DIN2576,DIN2641,DIN2642, DIN2655,DIN2656,DIN2627-2638,DIN2673 ,DIN86029,DIN86030BSBS10,BS4504 SANI1123 1000/3 1600/3 2500/3 T/D T/E ...