Volume XIX: ASME Pressure Vessels

Sep 07, 2017

Nearly all materials subject to cyclic loads break at stresses much lower than the rupture stresses produced by steady loads. The phenomenon is referred to as fatigue. Fatigue failures are defined as “repeated stress failures” and are results of stress repetition, rather than duration of time. Fatigue failure can also be a result of thermal variation; fatigue failure has occurred in boiler drums due to temperature variations in the shell at the feed water inlet. Read more

Volume XVIII: ASME Pressure Vessels

Aug 03, 2017

Seismic forces on a vessel result from a sudden erratic vibratory motion of the ground on which the vessel is supported and the vessel response to this motion. The principal factors in the damage to pressure vessels are the intensity and the duration of the earthquake motion. The forces and stresses in pressure vessels during an earthquake are transient, dynamic in nature, and complex. To simplify the design procedure, the vertical component of the earthquake is neglected, and the horizontal component is reduced to equivalent static forces. Read more

Volume XVII:  ASME Pressure Vessels

Volume XVII: ASME Pressure Vessels

Aug 03, 2017

This Section provides requirements for all methods of construction of power, electric and miniature boilers; high temperature water boilers used in stationary service; and power boilers used in locomotive, portable and traction service. Read more

Volume XVI: ASME Pressure Vessels

Aug 03, 2017

A skirt support consists of a cylindrical or conical shell welded to the bottom head of the vessel. A base ring at the bottom of the skirt transmits the load to the foundations through the anchor bolts. Read more

Volume XV:  ASME Pressure Vessels

Volume XV: ASME Pressure Vessels

May 04, 2017

The User is responsible for defining all applicable loads and conditions acting on the pressure vessel that affect its design. These loads and conditions are specified in the User’s Design Specification. The manufacturer cannot include any loadings or conditions in the design that are not defined in the UDS. Read more

Volume XIV:  ASME Pressure Vessels

Volume XIV: ASME Pressure Vessels

May 03, 2017

What is ASME Section VIII, Div. 2? ASME VIII-2 contains mandatory requirements, specific prohibitions, and non-mandatory guidance for the design, materials, fabrication, examination, inspection, testing and certification of pressure vessels and their associated pressure relief devices. This Code is also applicable to those chambers of combination units that are in the scope of ASME VIII-2. Read more

Volume XIII: ASME Pressure Vessels

Mar 01, 2017

Tall pressure vessels are generally defined as those where the height to diameter ratio (H/D) is more than 15. These vessels are built these days as self-supporting structures, i.e., they are supported on cylindrical or conical skirts with a base ring resting on a concrete foundation and firmly fixed to the foundation by anchor bolts embedded in concrete. Read more

Volume XII: ASME Pressure Vessels

Feb 10, 2017

This presentation will 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. Find out more about the specific formulas used. Read more

Volume XI.IV:  ASME Pressure Vessels

Volume XI.IV: ASME Pressure Vessels

Jan 23, 2017

Inspection of Repairs BOTH the National Board Inspection Code and API 510 require the acceptance of repairs to a pressure vessel by the authorized inspector BEFORE the vessel is returned to service. The authorized inspector will normally require performing all of the nondestructive examinations for the repair that were required by the ASME Code during original construction. Alternative NDE methods can be proposed (such as the substitution of UT for RT) when it is not possible, or practical, to use the NDE method that was used during construction. Read more

Volume XI.III:  ASME Pressure Vessels

Volume XI.III: ASME Pressure Vessels

Jan 16, 2017

National Board Inspection Code vs. API 510 This article discusses the steps in how a facility would need to go about getting one of their coded pressure vessels repaired, altered, or re-rated. The article will cover pertinent code and jurisdiction requirements and the differences among the American Society of Mechanical Engineers (ASME) Code, the National Board Inspection Code (NBC), and American Petroleum Institute (API) requirements; as well as discuss the following: design of repairs; planning and approval; responsible organization; materials; replacement parts; welding; postweld heat treatment (PWHT); inspections and hydrotest procedures; and documentation. Read more

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