Session: CS-07-01 Recent Developments in ASME Codes and Standards I

Paper Number: 62293

Start Time: Wednesday, July 14, 2021, 05:00 PM

62293 - A Case for New Low Pressure Vessel (LPV) Codes for Design Pressures Below 15 psi (100 kPA) 

Today the ASME Boiler and Pressure Vessel Code Section VIII (ASME Code) covers pressure vessels for design pressure for 15 psig (103 kPag) and above but does not provide guidance for design pressures below 15 psig.    

Manufacturers of smaller, under 10 feet (3048mm) diameter,  vessels have been designing to but ASME Code but not stamping these pressure vessels.  The ASME Code is explicit in wanting to that the ASME code is not to be mentioned if the item is not stamped.  The European codes EN 286-1 and EN 13445 as well as American PIP VESBI002 partially address these vessels.

 

For larger items low pressure vessels, over 10 feet (3048 mm) in diameter, manufactures have designed and built them to “good engineering practice” using Finite Element Analysis and parts of the ASME Code (Division 1 and 2 both rules and analysis portions), API 650, API 620 and the AISC Manual of Steel Construction.  The European codes EN 1993-4-1 and EN 1993-4-2 also provide guidance.  ABS and DNV provide rules and analysis methods for shell plates reinforced with stiffening grillages.

This paper provide an overview of these existing codes, standards and methods for design, fabrication and testing then provide a direction and required content for the development of two Codes for low pressure vessels (LPV).  One code for pressure vessels not greater than 10 feet (3048mm) in diameter and one code for code for pressure vessels greater than 10 feet (3048mm) in diameter.  This 10 foot demarcation line is arbitrary and based on experience of the authors therefore may need to be adjusted or allow for overlap between the two codes.  The audience for the smaller pressure vessels would be small batch chemical, pharmaceutical, food, and beverage processing facilities who require small near atmospheric pressure vessels.  The audience for the larger pressure vessels would be power plants, refineries, chemical plant, steel mills and concrete plants flue gas treatment and CO₂ sequestration of exhaust products which is becoming more prevalent as the need for sustainability increases. 

 

Presenting Author: Barry Millet Fluor Enterprises, Inc.

Authors:

Barry Millet Fluor Enterprises, Inc.
Kaveh Ebrahimi Fluor Limited
James Lu Fluor Enterprises, Inc.
Donald Spencer Fluor Enterprises, Inc.