StandardASME B16.9,ASME B16.5, HG20595,HG20617, GB/T9115,JB/T82 MaterialGr1,Gr2,Gr7, N200/201,N6, Inconel600,Monel400,Hastelloy-C276 SizeNPS1/4-24"(DN10~600) Pressure ratingClass150~1200LBS PN1.0MPa~25.0MPa Working temperature Surface TreatmentForging,rolling,smooth by lathe, polishing TestingUT,P/T,etc.