1)size:1/2"to 72" 2)material:carbon steel,stainless steel,etc 3)standard:ANSI B16.5 4)WT:#150-#2500 ... , A182, F43, A276 S32750,A705 631,632,A961, A484, etcAlloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70, A182 ... F12,F11,F22,F5,F9,F91,F1ECT)qualificationISO9001:2008 Quality Mangement System Certificate,ISO 14001 Environment Mangement System Certificate,OHSAS18001 ...