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