News

Volume XXXIX:  ASME Pressure Vessels

Volume XXXIX: ASME Pressure Vessels

May 28, 2019

API-653, Tank Repair and Alteration, intends that repairs and alterations made on an Aboveground Atmospheric Storage Tank (AST) result in general equivalence to API-650 requirements. Section 9 of API-653, contains specific requirements that are intended to meet this objective. After the AST has been in service for some time, thinning due to corrosion may require that sections of the shell be repaired in order for the tank to have adequate strength for its next period of operation. Such repairs are generally done by installing insert plates into the shell using full-thickness butt welds. Read more

Volume XXXVIII Vol II:  ASME Pressure Vessels

Volume XXXVIII Vol II: ASME Pressure Vessels

Apr 29, 2019

This is the second in our series of articles covering rerating of refinery and chemical plant processing equipment. Heat exchangers sometimes must be uprated due to an increase in design pressure or temperature when a plant is debottlenecked. At other times, corrosion in excess of the original corrosion allowance may have occurred and a decision may have to be made whether to repair, replace, or downrate the exchanger. In either case, a mechanical design engineer is usually responsible for making what is sometimes referred to as “rerating” calculations. Read more

Volume XXXVIII Vol I:  ASME Pressure Vessels

Volume XXXVIII Vol I: ASME Pressure Vessels

Mar 15, 2019

Frequently when debottlenecking process plant equipment, the possibility of increasing the equipment's design temperature, design pressure, or both comes up. This process of re-evaluating the equipment for more severe design conditions is usually referred to as uprating. Read more

Volume XXXVII:  ASME Pressure Vessels

Volume XXXVII: ASME Pressure Vessels

Mar 15, 2019

At a minimum, pressure vessels should be designed in accordance with the American Society of Mechanical Engineers (ASME) Code for material contents of varying characteristics. Facilities should address any added concerns about the temperature and characteristics of vessel contents (e.g., toxic, corrosive, reactive, or flammable contents). Read more

Volume XXXVI:  ASME Pressure Vessels

Volume XXXVI: ASME Pressure Vessels

Feb 05, 2019

Improperly operated or maintained pressure vessels can fail catastrophically, kill and injure workers and others, and cause extensive damage even if the contents are benign. Read more

Volume XXXV:  ASME Pressure Vessels

Volume XXXV: ASME Pressure Vessels

Dec 27, 2018

The scope of this presentation is to present basic information and understanding of the ASME code for the design of pressure vessels for the chemical and process industry as applicable in the United States and most of North and South America. Read more

Volume XXXIV:  ASME Pressure Vessels

Volume XXXIV: ASME Pressure Vessels

Dec 04, 2018

What is a deaerator? What does it do? How does it work? A deaerator is a device that is widely used for the removal of oxygen and other dissolved gases from the feedwater to steam-generating boilers. Read more

Volume XXXIII:  ASME Pressure Vessels

Volume XXXIII: ASME Pressure Vessels

Nov 02, 2018

Many people do not know or are not realize that a Pneumatic pressure test can be very dangerous • Pneumatic testing is widely used to achieve minimum down time and economy and convenience of testing as compared to hydrostatic tests. It is also useful to detect very fine leak paths which may not be found in Hydrostatic testing. Read more

Volume XXXII:  ASME Pressure Vessels

Volume XXXII: ASME Pressure Vessels

Sep 27, 2018

Distillation is a process in which a liquid or vapour mixture of two or more substances is separated into its component fractions of desired purity, by the application and removal of heat. This is a process used for centuries to separate compounds into their principal components. One such use comes to mind. Liquor stills to make “moonshine” were prevalent in the United States for many years. Read more

Volume XXXI:  ASME Pressure Vessels

Volume XXXI: ASME Pressure Vessels

Aug 31, 2018

A Packed column utilizes packing to contact between the phases (liquid-vapor) on the surface. A major advantage to packed columns is the reduction in pressure across the column. Typically the column pressure drop for a packed column is less than that of a trayed column because of the percent open area. Read more

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