... 4'' * 150lbs 2.Material: A105 3.Standard:ANSI B16.5 carbon steel and stainless steel weld neck flangessize 1/2" to 24" ASME B16.5 ... B16.47, ASME B16.36,DIN2505,EtcMaterialCarbon steel(ASTM A105,Q235,A350LF2,A350LF3,Etc)Stainless steel(ASTM A182 F304, F304L,F316,F316L,F321 ... ,F347,F310F44F51,A276 S31803, A182, F43,Etc)Alloy steel(ASTM A694 ...