ASME PTC 7.1

Abstract

OBJECT AND SCOPE <br> This code provides standard directions for conducting and reporting tests on displacement pumps. <br> The object of the code is to establish rules for conducting tests on pumps to determine, under specified conditions, one or more of the following quantities: <br> (a) Pump capacity or rate of flow <br> (b) Power input <br> (c) Efficiency <br> (d) Inlet requirements. <br> Pumps covered by this code shall be defined as displacement pumps that obtain their pumping action by repeated alternate filling and emptying of volume elements. <br> (a) General purpose pumps, not lubricated by the liquid being pumped, for handling liquids having very little or no lubricating value. <br> (b) General purpose pumps lubricated by the liquid being pumped, for handling liquids having some lubricating value. <br> (c) Special purpose pumps for handling a specific type of liquid or for special operating conditions, such as temperature or viscosity. <br> The liquids to be used for test under this code shall be as follows: <br> (a) General purpose pumps which may be operated with water shall be tested with clean water at some temperature between 60 and 130 F. <br> (b) General purpose pumps which may not be operated with water shall be tested with a clean petroleum oil having a viscosity of 250 SSU at some temperature between 60 and 130 F, or a similar liquid having sufficient lubricating value to prevent scoring or wear of parts. <br> (c) Special purpose pumps shall be tested with the type of liquid for which the pump was designed and at the temperature and viscosity specified, within the limits of acceptable deviation indicated in Table 1. <br> If the liquids recommended above are considered by either party to the test to be unsuitable or impractical for the test, another liquid shall be selected by mutual agreement before conducting the test. <br> While this code provides a test procedure and instrumentation for determining the quantities that are the object of the test, it does not exclude other procedure or instrumentation or determination of other quantities or qualities. If other procedures or instrumentation are used, or additional quantities or qualities are to be determined, these must be agreed to in writing by the parties to the test prior to the test. However, only tests which do not violate the mandatory requirements of this code may be designated as tests conducted in accordance with the ASME Power Test Code. <br> References to other codes, unless otherwise specified, refer to ASME Power Test Codes. Should specific directions in this code for any particular measurement differ from those given in other ASME Power Test Codes for similar measurements, the instructions of this code shall prevail. <br> The Code on General Instructions (PTC 1-1945) shall be studied and followed where applicable. The mandatory provisions of Parts III and IV of the Code on General Instructions (PTC 1-1945) shall be part of this code, even though such provisions are not explicitly stated herein. <br> The Code on Definitions and Values (PTC 2-1945) defines certain technical terms and numerical constants which are used throughout the present code with the significance and value therein established. <br> It is the intent of this code that the meaning of the terms: pressure, capacity, power input, efficiency and inlet requirements shall be determined as herein specified, and that such terms shall be understood only as thus defined. <br> When specified in contracts requiring acceptance tests, the test conditions and procedures described in this code shall be the basis for evaluating guaranteed characteristics. <br> The requirements of accuracy underlying these guarantees are established in this code by prescribing limiting conditions for those methods which provide measurements of pressure, speed, rate of flow, power input, and inlet requirements. <br> Where the actual test conditions do not fall within the limits set by this code for the method of measurement to be used, agreement shall be made between representatives of both parties to the test as to the allowable test conditions. Such agreement shall be reached before conducting the test. <br> Descriptions of instruments and apparatus beyond those specified in this code, but necessary to the conduct of test's under this code, may be found in the ASME Power Test Code Supplements on Instruments and Apparatus, herein designated by the abbreviation "I & A." <br> This code applies to the test of the pump proper only, and the terms power, efficiency, pressure, etc., are to be taken as referring to the pump proper. However, the recorded data and final report may include information on the complete unit, including driving and auxiliary equipment. <br> The tests specified in this code may be conducted in the manufacturer's shops, on the user's premises, or elsewhere as agreed upon, provided such tests meet the requirements of this code.