... :1/2"to 72" 2)material:carbon steel,stainless steel,etc 3)standard:ANSI B16.5 4)WT ... ,F310F44F51,A276 S31803, A182, F43,Etc)Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65, ... F11,F22,F5,F9,F91,Etc)QualificationISO9001:2008 Quality Mangement System Certificate,ISO 14001 Environment Mangement System ... black painted,as per customer's request.4,high-temperature resistant with black painting.5,marking:acorrding ...