Nozzle Loads, Piping Stresses, and the Effect of （喷嘴,管道压力的影响）.pdf

Nozzle Loads, Piping Stresses, and the Effect of Piping on Equipment By Patty Brown Mark van Ginhoven November 13, 2009 1 CA © 2009 Fluor Corporation. All Rights Reserved. Topics Covered • Introduction • Nozzle Loads – What are they? • API 610 vs. ANSI Allowable Forces and Moments • Nozzle Load Issues for Different Pump Types • Information Stress Engineering Needs • Special Cases Please feel free to ask questions! 2 Introduction • As Mechanical Equipment Engineers, we need to understand how our equipment interacts with the other aspects of the plant, especially piping. • All API equipment codes have formulas or tables for “Allowable Nozzle Loads” – but what do they really mean? • Lets go back to our university statics course for a moment… 3 What are Nozzle Loads? • Nozzle loads are the net forces and moments exerted on equipment nozzles from the weight and thermal expansion of connected piping and equipment. • The loads exerted on equipment are directly related to how the equipment and piping are supported. • Increased nozzle loads are a cause of misalignment and increased wear and vibration rates in pumps. 4 What are Equipment Nozzle Loads? Continued… • Thermal Growth