This standard specifies the minimum requirements for general-purpose steam turbines. These requirements include basic design@ materials@ related lubrication systems@ controls@ auxiliary equipment and accessories. This standard includes only general-purpose turbines. General-purpose turbines are horizontal or vertical turbines used to drive equipment that is usually spared@ is relatively small in size (power)@ or is in non-critical service. They are generally used where steam conditions will not exceed a pressure of 48 bar (700 psig) and a temperature of 400 ??(750 ?? or where speed will not exceed 6@000 r/min. This standard does not cover special-purpose turbines. Special-purpose turbines are those horizontal turbines used to drive equipment that is usually not spared@ is relatively large in size (power)@ or is in critical service. This category is not limited by steam conditions or turbine speed. Requirements for special-purpose turbines are defined in API 612. In case of conflict between this standard and the inquiry or order@ the information included in the order shall govern.