Home>API standards>API Std 617 – 2002 pdf free download

API Std 617 – 2002 pdf free download

API Std 617 – 2002 pdf free download.Axial and Centrifugal Compressors and Expander-compressors for Petroleum, Chemical and Gas Industry Services.
1.5.33 pressure casing: The composite of all stationary pressure-containing parts of the unit, including all nozzles and other attached parts. 1.5.34 purchaser: The individual or organization that issues the order and specification to the vendor. Note: The purchaser may be the owner of the plant in which the equipment is to be installed or the owner’s appointed agent. 1.5.35 radially split: A joint that is perpendicular to the shaft centerline. 1.5.36 rated speed (also known as 100% speed): The highest rotational speed required to meet any of the spec- ified operating conditions. 1.5.37 relief valve set pressure: The pressure at which a relief valve starts to lift. 1.5.38 remote: Refers to the location of a device when located away from the equipment or console, typically in a control room. 1.5.39 settling out pressure: The pressure of the com- pressor system when the compressor is shut down. 1.5.40 shaft end seal: The process gas seal on the end of the shaft which restricts leakage of process gas to the atmosphere. 1.5.41 shall: “Shall” indicates a requirement. 1.5.42 should: “Should” indicates a recommendation. 1.5.43 stability analysis: The determination of the nat- ural frequencies and the corresponding logarithmic decre- ments of the rotor/support system using a complex eigenvalue analysis. 1.5.44 stall: The volume flow capacity below which an axial compressor becomes aerodynamically unstable. This is caused by blade drag due to non-optimum incidence angles.
1.5.46 surge: The volume flow capacity below which a centrifugal compressor becomes aerodynamically unstable. 1.5.47 synchronous tilt pad coefficients: Derived from the complex frequency dependent coefficients with the frequency equal to the rotational speed of the shaft. 1.5.48 tooth pitting index: A surface durability rating factor that is determined by the tangential load, pitch diame- ter, face width and gear ratio. 1.5.49 total indicated reading (TIR), (also known as total indicator runout): The difference between the maximum and minimum readings of a dial indicator or simi- lar device, monitoring a face or cylindrical surface during one complete revolution of the monitored surface. Note: For a perfectly cylindrical surface, the indicator reading gives an eccentricity equal to half the reading. For a perfectly flat face, the indicator reading gives an out-of-squareness equal to the reading. If the diameter in question is not perfectly cylindrical or flat, interpre- tation of the meaning of TIR is more complex and may represent ovality or lobing. 1.5.50 trip speed (in rpm): The speed at which the inde- pendent emergency overspeed device operates to shut down a variable-speed prime mover. For the purpose of this standard, the trip speed of alternating current electric motors, except variable frequency drives, is the speed (rpm) corresponding to the synchronous speed of the motor at maximum supply fre- quency. 1.5.51 turndown: The percentage of change in capacity (referred to rated capacity) between the rated capacity and the surge point capacity at the rated head when the unit is operat- ing at rated suction temperature and gas composition. 1.5.52 unit responsibility: Refers to the responsibility for coordinating the technical aspects of the equipment and all auxiliary systems included in the scope of the order.
2.1 GENERAL 2.1.1 Performance 2.1.1.1 The equipment shall be capable of operating at all specified conditions. 2.1.1.2 The purchaser will specify the conditions for the equipment’s normal operating point. 2.1.1.3 The compressor shall be designed to deliver normal head at the normal inlet volumetric flow without negative tol- erance. The power at the normal operating point shall not exceed 104% of the predicted value. Note 1: See the optional performance test criteria in each chapter for handling of excess head for constant speed drivers and specified pro- cess intermediate pressures. Note 2: The purchaser may furnish mass flow which will then be converted to volumetric flow by the supplier. 2.1.1.4 Gas properties used shall be mutually agreed upon. 2.1.2 The equipment (including auxiliaries) covered by this standard shall be designed and constructed for a minimum service life of 20 years and at least 5 years of uninterrupted operation. Note: It is recognized that this is a design criterion. 2.1.3 The vendor shall assume unit responsibility for all equipment and all auxiliary systems included in the scope of the order. 2.1.4 Equipment driven by induction motors shall be rated at the actual motor speed for the rated load condition. 2.1.5 Unless otherwise specified, cooling water systems shall be in accordance with 2.1.5.1 through 2.1.5.2.

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