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API RP 687-2001 pdf free download

API RP 687-2001 pdf free download.Rotor Repair.
1 Scope/Definition/Reference Standards 1.1 SCOPE 1.1.1 This recommended practice covers the minimum requirements for the inspection and repair of special purpose rotating equipment rotors, bearings and couplings used in petroleum, chemical, and gas industry services. This recommended practice is separated into 7 specific chapters. Chapters 2 through 7 are to be used separately from each other and in conjunction with Chapter 1. Refer to Chap- ter 1, Section 2 for the process used to overhaul and refurbish a rotor. Tutorial Discussion: The document covers equipment manufactured to the requirements of API 612 Special Purpose Steam Turbines, API 613 Special Purpose Gears, API 617 Special Purpose Centrifugal Compres- sors, API 619 Special Purpose Rotary Positive Dis- placement Compressors, API 671 Special Purpose Couplings, and Hot Gas Expanders used in FCCU Power Recovery and Nitric Acid Services. Note: A bullet ( • ) at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the owner. This information should be indi- cated on the appropriate data sheets; otherwise it should be stated in the quotation request or in the order. 1.1.2 The basis of repair recommendations shall be to return dimensions required for spare parts interchangeability to the latest design fits and clearances and produce a safe reli- able rotating element capable of at least 5 years of uninter- rupted operation. Note: Returning these dimensions to the latest design fits and clear- ances will allow the repair to: a. Maintain interchangeability with other units. b. Use existing spare parts. c. Eliminate errors in manufacturing future spare parts that could be caused by undocumented dimensional changes. d. Maintain its critical speed margins and torque transmission capabilities.
1.2 ALTERNATIVE PROCEDURES The vendor may offer alternative procedures and designs. (See Chapter 1, paragraph 2.5 for proposal requirements). Note: Any exception to this recommended practice shall be clearly stated in the proposal as required by Chapter 1, paragraph 12.2. 1.3 CONFLICTING REQUIREMENTS In case of conflict between this recommended practice and the inquiry, the inquiry shall govern. At the time of the order, the order shall govern. 1.4 DEFINITION OF TERMS The terms used in this recommended practice are defined in 1.4.1 through 1.4.28. 1.4.1 almen strips: Metallic strips used to determine the intensity of peening. 1.4.2 calibration: The set of operations which establish, under specified conditions, the relationship between values indicated by a measuring instrument, or measuring system, or values represented by a material measure, and the corre- sponding known values of a standard. Notes: 1. The results of calibration permit the estimation of indication errors of the measuring system, material measure or the assignment of values to marks on an arbitrary scale. 2. The results of calibration may be recorded in a document some- times called a calibration certificate. Calibration method is a defined technical procedure for performing a calibration. 1.4.3 hydrodynamic bearings: Bearings that use the principles of hydrodynamic lubrication. The bearing surfaces are oriented so that relative motion forms an oil wedge, or wedges, to support the load without shaft-to-bearing contact. 1.4.4 indications: A response or evidence of a discontinu- ity that requires interpretations to determine its significance. 1.4.5 “J” strips: Thin rotating labyrinth strips held in position by caulking or prick punching to the shaft or sleeve to provide pressure breakdown. These may also be referred to as “L” strips or “T” strips.
1.4.6 maximum allowable temperature: The maxi- mum continuous temperature for which the original equip- ment manufacturer (OEM) or repair facility has designed the equipment (or any part to which the term is referred) when handling the specified fluid at the specified maximum operat- ing pressure. 1.4.7 maximum allowable working pressure: The maximum continuous pressure for which the OEM or repair facility has designed the equipment (or any part to which the term is referred) when handling the specified fluid at the spec- ified maximum operating temperature. 1.4.8 maximum continuous speed: The highest rota- tional speed (revolutions per minute) at which the machine, as built and tested, is capable of continuous operation with the specified fluid. 1.4.9 measurement accuracy: The smallest division on the measurement device.

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