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Electric cables are normally installed on the assumption of a safe working life

Electric cables are normally installed on the assumption of a safe working life of at least 20 years. Changes in the insulating material take place with the passing of time and these changes, which may eventually result in an electrical breakdown, are accelerated at…[Leggi tutto]

The performance of a centrifugal fan with enlarged impeller

The influence of enlarged impeller in unchanged volute on G4-73 type centrifugal fan performance is investigated in this paper. Comparisons are conducted between the fan with original impeller and two larger impellers with the increments in impeller outlet diameter of 5% and 10%…[Leggi tutto]

3 Ways Suspended Platforms Increase Efficiency for Vertical-Vessel Maintenance

It’s time to upgrade maintenance practices for vertical vessels. Like any routine maintenance, inspecting, removing and replacing refractory in vertical vessels places a costly burden on facilities in terms of downtime and lost productivity. One of the main reasons f…[Leggi tutto]

The flat glass produced by the float glass process has a tin-rich surface due to the contact with molten tin. The penetration of tin into the glass surface is assumed to involve coupled diffusion of stannous (Sn2+) and stannic (Sn4+) ions. The diffusion coefficients of these ions were calculated using the modified Stocks–Einstein relation with t…[Leggi tutto]

Polyvinyl chloride (PVC) has become one of the dominant construction materials for sewer systems over the past decades, as a result of its reputed merits. However, since PVC sewer pipes have operated for decades in a hostile environment, concern over their longevity has been lately raised by sewer managers in the Netherlands. Towards that…[Leggi tutto]

This article discusses the significant factors in the selection of forging equipment for a particular process. It describes the characteristics of forging hydraulic presses, mechanical presses, screw presses, and hammers. The article discusses the significant characteristics of these machines that comprise all machine design and performance data,…[Leggi tutto]

As if learning the vocabulary, geography, and producers in the wine world isn’t challenging enough, there are also different types of glassware—and figuring out the best wine glasses is no small feat. In the last couple of decades, glass manufacturers have made a killing off of creating dozens of glassware lines and convincing wine drinkers we nee…[Leggi tutto]

This paper deals with the determination of the stress distribution at the fillet of a ANSI B16.5 flanges attached internally to a hollow cylinder. A load parallel to the axis of the cylinder and of variable eccentricity acts on a bearing plate which rests on the flange. The strains are measured by means of electrical resistance wire strain gages.…[Leggi tutto]

Carpet and rugs currently represent about half of the United States flooring market and offer many benefits as a flooring type. How carpets influence our exposure to both microorganisms and chemicals in indoor environments has important health implications but is not well understood. The goal of this manuscript is to consolidate what is known…[Leggi tutto]

Aluminum alloys are increasingly being used in a broad spectrum of load-bearing applications such as lightweight structures, light rail, bridge decks, marine crafts, and off-shore platforms. A major concern in the design of land-based and marine aluminum structures is fire safety, at least in part due to mechanical property reduction at…[Leggi tutto]

Lignin is a natural broad-spectrum sun blocker due to its UV-absorbing functional groups, e.g., phenol units. UV absorbers can protect materials such as paints and plastic from sun damage.

Richard Venditti, North Carolina State University, Raleigh, USA, and colleagues have developed sustainable, biodegradable, and transparent cellulose-lignin…[Leggi tutto]

When it comes to glassware, the sexier vessels — a coupe, a flute, a wineglass — seem to get all the glory. But a simple glass cup (which can be just as appropriate for juice, wine, iced coffee, or yes, a G&T) gets used more than any of those options — and is just as worthy of praise. Whether you’re in the market for a basic, stackable matchin…[Leggi tutto]