Seal assembly for high-pressure equipment

Abstract The ASME Pressure-Viscosity Report was a seminal publication on high pressure-viscosity and density supervised by the ASME Research Committee on Lubrication, sponsored by dozens of industries, and undertaken by Harvard University using high-pressure equipment developed by Prof. P. W. Bridgman. The resulting measurements of the “Viscosity and Density of Over 40 Lubricating Fluids of Known Composition at Pressures to 150,000 psi (1034 MPa) and Temperatures to 425 °F (218.3 °C/491.5 K)” should have become an invaluable reference to tribologists around the world. The present work revisits that monumental effort to distill the results into an established equation of state using modern computer software. The authors used curve-fitting techniques to fit measured density and viscosity data to the parameters of the Tait-Doolittle equation for use in further tribological modeling. This information will help a new generation of engineers to model the piezoviscous properties of lubricant base-stocks in diverse tribological applications.

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Square Root 3: Background to the New Design Margin for High Pressure Vessels

Volume 5: High Pressure Technology, Nondestructive Evaluation, Pipeline Systems, Student Paper Competition ◽

10.1115/pvp2005-71295 ◽

2005 ◽

Author(s):

Jan Keltjens ◽

Philip Cornelissen ◽

Peter Koerner ◽

Waldemar Hiller ◽

Rolf Wink

Keyword(s):

High Pressure ◽

Pressure Vessel ◽

Pressure Vessels ◽

Design Code ◽

Code Change ◽

Section Viii ◽

Background Material ◽

Practical Information ◽

High Pressure Equipment ◽

Design Margin

The ASME Section VIII Division 3 Pressure Vessel Design Code adopted in its 2004 edition a significant change of the design margin against plastic collapse. There are several reasons and justifications for this code change, in particular the comparison with design margins used for high pressure equipment in Europe. Also, the ASME Pressure Vessel Code books themselves are not always consistent with respect to design margin. This paper discusses not only the background material for the code change, but also gives some practical information on when pressure vessels could be designed to a thinner wall.

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Advanced High Strength Martensitic Stainless Steels for High Pressure Equipment

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition ◽

10.1115/pvp2018-84546 ◽

2018 ◽

Author(s):

J. M. Lardon ◽

T. Poulain

Keyword(s):

High Pressure ◽

Yield Strength ◽

Stress Corrosion ◽

Stainless Steels ◽

High Strength ◽

Pressure Vessels ◽

Martensitic Stainless Steels ◽

Ultra High Pressure ◽

Resistance To Stress ◽

High Pressure Equipment

Maraging stainless steels offer a large panel of high strength materials with good ductility and stress corrosion cracking resistance. Their mechanical properties compared to conventional 15-5 PH and 17-4 PH martensitic stainless steels show much better yield strength / toughness compromise for yield strength exceeding 1300 MPa. In the same time, fatigue resistance is significantly increased at high strength stress levels and material keeps good resistance to stress corrosion. These properties make them particularly suitable for ultra-high pressure equipment or high pressure rotating components submitted to high cyclic stresses. Their application for Pascalisation pressure vessels and ultra-high pressure compressors for ethylene gas is briefly presented.

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