... WPB , ,GOST Standard:DIN , JIS, EN10253 elbow 45, 90,180 degree elbow Thichness : Sch 10--Sch 160Material :ASTM A234 WPA Standard ... steel , stainless steel Type 45&90 LR/SR elbows , 180 degree returns , straight , reducing tees , caps , concetric and eccentric reducers radius ...