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CHICAGO CHAPTER THREE
MEETING
Tuesday, February 13
Understanding NFPA T2.6.1 R2
Presented by John Berninger
Abstract
This meeting provides an understanding of standard NFPA T2.6.1
R2, Fluid Power Components - Method for verifying Fatigue and
Establishing Burst Pressure Ratings of the Pressure-Containing
Envelope of a Metal Fluid Power Component
A must-see event
for all your customers and suppliers! As project chair for the
standard and the USA TAG representative to ISO, John is the
world’s expert on the subject. This is a once-in-a-lifetime
opportunity to listen to the Grandfather of pressure fatigue and
to apply his expertise to your own work!
In fluid power
systems, power is transmitted and controlled through a fluid
(liquid or gas) under pressure within an enclosed circuit.
During operation, components in a system may be loaded from
internal pressure, gravity, inertia, thermal variations, and
external forces. The nature of these loads can vary from a
single static application to continuously changing amplitudes,
repetitive loadings, and even shock.
Although it is
important to know how well a component can withstand all of
these loads NFPA T2.6.1 R2 addresses only the loading caused by
internal pressure.
Internal pressure
loads can be imposed on a component in various ways. NFPA
T2.6.1 R2 considers a broad range of waveforms on certain metals
but within prescribed time limits, temperatures, and
environmental conditions. These limitations are expected to
provide sufficient common ground for comparing products.
Therefore this rating method provides the system designer with
certain information to assist in selecting components for a
specific application. The designer still has the responsibility
to consider the other loading characteristics described above
and to determine how they might affect the component’s ultimate
pressure-retaining capability.
Many standards
already exist for pressure-rating individual components (e.g.
maximum allowable operating pressure), and this standard is not
intended to displace them. Instead, it provides a method of
fatigue verification.
NFPA T2.6.1 R2
serves as a universal verification test to give credence to the
many in-house and customer required methods of determining
component pressure ratings. The credibility is based on the
fundamental nature of metal fatigue with its statistical
treatment, and a mathematical development of the theory is
included. Nevertheless, design knowledge of the component
population and its representative samples, including consistency
in materials, shapes, fabrication techniques, etc., is necessary
to maximize accuracy in the verification method.
Location:
Hackney’s
1514 E. Lake St. Glenview
Interactive Map
847-724-7171
Date/Time:
Tuesday, February 13, 2007
6:00 PM Dinner menu selection
7:00 Presentation
8:00 Q&A
Cost: Active
Members: $ 10.00, incl. tax, tip, and speaker expense.
Guests: $30.00
Hackney’s is
located on East Lake St, 1/2 blk. east of Waukegan Rd. Exit 294
Willow, East to Pfingsten, South to East Lake, East to
Hackney’s; or, Exit 94 on Lake, West to Hackney’s |
