Thispapermainlyintorducesthemanufacturingtechnologyofthethreelowtemperaturetowersmadeof315%Nisteel、includingweldingprocedure,stressreliefheattreatmentafterwelding(PWHT),theform2ingandtheassemblingprocessofheadandshellaswellashydrostatictestsprocedure,whicharethedeter2miningfactorsforthesuccessfulfabricationoftheequipment.