The Crosby® Pressure Relief Valve Engineering Hand- book contains important technical information 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.
Reference 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 Code, 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 service to Crosby’s 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 specific 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 committees 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 manufactured 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 and the letters NB on each valve nameplate. Crosby’s valves are designed, manu- factured and tested in accordance with a quality man- agement system approved to the International Stan- dard Organization’s ISO 9000 Quality Standard Series requirements. With proper sizing and selection, the user can thus 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 staff of highly trained people strategically located throughout the world who should be contacted when a question arises. Refer to Crosby’s Worldwide Directory for an up-to-date contact listing.