国外安全阀手册(Safety_Valve_Handbook)英文.pdf
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1、Technical Document No. TP-V300 Effective: May 1997 Crosby Pressure Relief Valve Engineering Handbook Crosby Valve Inc. An FMC Corporation subsidiary COV/CON.PM69/22/97, 7:56 AM1 Table of Contents Notes: COV/CON.PM69/22/97, 7:56 AM2 *United States Customary System Warning: The information contained
2、 in this handbook is for informational purposes only. See also Crosbys computer sizing program, CROSBY-SIZE. The actual selection of valves and valve products is dependent upon numerous factors and should be made only after consultation with applicable Crosby personnel. Crosby assumes no responsibil
3、ity for the actual selection of such products and hereby expressly disclaims liability for any and all claims and damages which may result from the use or application of this information or from any consultation with Crosby personnel. CROSBY Pressure Relief Valve ENGINEERING HANDBOOK CONTENTS Chapte
4、r 1Introduction to Crosby Engineering Handbook Chapter 2Fundamentals of Pressure Relief Valve Design Chapter 3Terminology Chapter 4Codes and Standards - Summary Chapter 5Valve Sizing and Selection - U.S.C.S.* Units Chapter 6Valve Sizing and Selection - Metric Units Chapter 7Engineering Support Infor
5、mation AppendixASME Section VIII, Division 1, 1992 Edition Exerpts Other InformationOrdering Information Pressure Relief Valve Specification Sheet COV/CON.PM69/22/97, 7:57 AM3 click on chapter for quick access The Crosby Pressure Relief Valve Engineering Hand- book contains important technical info
6、rmation relating to pressure relief valves. The primary purpose of a pressure relief valve is protec- tion of life and property by venting fluid from an overpressurized vessel. Information contained in this handbook applies to the overpressure protection of pressure vessels, lines and systems. Refer
7、ence is made to the ASME Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels. The information in this handbook is NOT to be used for the application of overpressure protection to power boilers and nuclear power plant components which are addressed in the ASME Boiler and Pressure Vessel C
8、ode, Section I, Power Boilers, and Section III, Nuclear Power Plant Components, respectively. Proper sizing, selection, manufacture, assembly, test, installation and maintenance of a pressure relief valve are all critical to obtaining maximum protection. This handbook has been designed to provide a
9、service to Crosbys customers by presenting reference data and technical recommendations based on our many years of experience in sizing, selecting, testing, installing and operating pressure relief valves. Sufficient data is supplied so to properly size and select Crosby pressure relief valves for s
10、pecific applications. Information cov- ering terminology, standards, codes, basic design, siz- ing and selection information, including examples, are presented in an easy to use format. Some of the material in this handbook is reprinted or excerpted from publications developed by associations or com
11、mittees in which Crosby has participated. The information contained in the manual is offered as a guide. Those who use the information are reminded of the limitations of such a publication and that there is no substitute for qualified engineering analysis. Crosby pressure relief valves are manufactu
12、red in ac- cordance with a controlled Quality Assurance Program which meets or exceeds ASME Code Quality Control Program requirements. Capacities are certified by the National Board of Boiler and Pressure Vessel Inspec- tors. These features are assured by the presence of an ASME Code Symbol Stamp an
13、d the letters NB on each valve nameplate. Crosbys valves are designed, manu- factured and tested in accordance with a quality man- agement system approved to the International Stan- dard Organizations ISO 9000 Quality Standard Series requirements. With proper sizing and selection, the user can thus
14、be assured that Crosby products are of the highest quality and technical standards in the world of pressure relief technology. When in doubt as to the proper application of any particular data, the user is advised to contact the near- est Crosby Regional Office or Representative. Crosby has a large
15、staff of highly trained people strategically located throughout the world who should be contacted when a question arises. Refer to Crosbys Worldwide Directory for an up-to-date contact listing. Crosbys Computer Aided Valve Sizing Program - “CROSBY-SIZE“ Crosby has designed a computer sizing program,
16、 CROSBY-SIZE, to provide maximum service to our cus- tomers by presenting recommendations based on Crosbys many years of experience. Use of this program allows an accurate determination of such parameters as orifice size, maximum flow and predicted sound level. The program is a powerful tool, yet ea
17、sy to use. Its many features include quick and accurate calculations, user selected units, selection of valve size and style, valve data storage, printed reports, specification sheets and dimensional drawings. Crosby Engineering Handbook Technical Publication No. TP-V300 Chapter I Introduction 1 - 1
18、 CHAPONE.PM69/22/97, 7:41 AM1 HOME 1 - 2 Crosby Engineering Handbook Chapter 1 Introduction Program control via pop-up windows, function keys, extensive on-line help facilities, easy to read formatted screens, immediate flagging of errors, easy editing of displayed inputs and other features combine
19、 to make the program easy to understand and operate. It is assumed that the user of CROSBY-SIZE has a basic understanding of relief valve sizing calculations. The user is responsible for correct determination of service conditions and the suitability of this program for a specific application. CROSB
20、Y-SIZE and Crosbys Engineering Handbook are useful tools in sizing pressure relief valves. Should additional clarification be required, contact Crosby. CHAPONE.PM69/22/97, 7:41 AM2 Introduction A pressure relief valve is a safety device designed to protect a pressurized vessel or system during an o
21、ver- pressure event. An overpressure event refers to any condition which would cause pressure in a vessel or system to increase beyond the specified design pres- sure or maximum allowable working pressure (MAWP). Since pressure relief valves are safety devices, there are many Codes and Standards wri
22、tten to control their design and application. The purpose of this discussion is to familiarize you with the various parameters involved in the design of a pressure relief valve and provide a brief introduction to some of the Codes and Standards which govern the design and use of pressure relief valv
23、es. Excerpts of various applicable Codes and Standards are included in other sections of this handbook. Many electronic, pneumatic and hydraulic systems exist today to control fluid system variables, such as pressure, temperature and flow. Each of these systems requires a power source of some type,
24、such as electricity or compressed air in order to operate. A pressure relief valve must be capable of operating at all times, espe- cially during a period of power failure when system controls are nonfunctional. The sole source of power for the pressure relief valve, therefore, is the process fluid.
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