hi
in our PMC for one of C.S class from 18" and above and thk>19mm client consider A671 gr.CC60 class 32 but due to availability of class 22 we want to buy class 22.I Know that difference is in heat treartment operation between above mentioned class but is there any big deviation according to follwing designe information max. designe pressure 130bar and minimum designe temp. is -29C.
in our PMC for one of C.S class from 18" and above and thk>19mm client consider A671 gr.CC60 class 32 but due to availability of class 22 we want to buy class 22.I Know that difference is in heat treartment operation between above mentioned class but is there any big deviation according to follwing designe information max. designe pressure 130bar and minimum designe temp. is -29C.
