Size : 1/2" To 24" (15MM To 600MM) Class/Pressure: #150 To #4500 End Connection : Flange, Buttweld, Socket Weld , NPT, Etc Design Standard : API 6D, ISO 14313, etc Testing Standard : API 6D, API 598, API 607, API 6FA, etc Body Material : Carbon Steel,Alloy Steel, Stainless Steel, Special Material Also Available