- Published on Monday, 03 August 2015 12:54
- Written by John V. Ballun, P.E.
From time to time, we are re-posting particularly well-received articles that have previously run on VALVEMagazine.com so that those who might have missed them will be able to catch up on the best of the best. This article, Understanding and Selecting Valve Flanges, Pt. I: Design and Standards, was Number 2 on our Top Ten online Stories of 2014 and initially ran on November 14, 2014.
Because flanges allow the assembly and maintenance of system components without the need for cutting and welding pipe, they play an important role in piping systems. However, the structural integrity and leak tightness of waterworks piping systems are only as strong as the weakest element, which often is the flange connection between various valves and fittings. Yet because piping systems are subject to many types of loads and are constructed of a variety of materials, understanding and predicting the rating and performance of those flange connections is difficult. This is further complicated by the fact that different sealing mechanisms such as gaskets, O-rings and mechanical seals can significantly affect the performance of the connections. As far as ratings, ASME B16.1 lists pressure ratings for Class 125 flanges from 50 to 200 psig depending on size, material and temperature.
- Published on Tuesday, 21 July 2015 12:36
- Written by Kate Kunkel
As valve end-user industries become more complex and demanding, manufacturers and suppliers must develop and find better, more efficient products to do the work. For that reason, resources are increasingly allocated to the research and development (R&D) teams that can create the technologies needed.
- Published on Tuesday, 26 May 2015 15:26
- Written by Arie Bregman and Kate Kunkel
Additive manufacturing (AM), also called 3D printing, is likely to transform the production of physical goods, including valves and actuators, in the same way the Internet drastically changed the information business model. It is now possible through AM to manufacture goods at locations where they are needed rather than where labor costs are lowest. That kind of model could change the concept of “just-in-time delivery” to “just-in-time manufacture where it is needed.”
- Published on Monday, 11 May 2015 17:52
- Written by Paul Bodgan
Superstorm Sandy made landfall Oct. 29, 2012 on the eastern seaboard of the United States, resulting in unprecedented flooding in the New York City metropolitan area. Flood levels zoomed past the previous record of 10 feet in the southern portion of Manhattan to reach 14 feet, and wave heights in New York Harbor were measured as high as 32 feet.
- Published on Wednesday, 04 March 2015 08:51
- Written by Genilee Parente
A universal issue that comes up at almost any event today is the need to attract new people with the right skills into the specialized, technical fields where valves and control devices are made and used. But to solve that problem requires something that many of those doing the hiring and training don’t have: an understanding of the differences between the generations of yesterday and those of tomorrow.