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…[Leggi tutto]

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…[Leggi tutto]

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…[Leggi tutto]

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 t…[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…[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…[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…[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 gla…[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…[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…[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…[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 mar…[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 mar…[Leggi tutto]