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Steel pipe is required in the majority of oil and gas production and pipeline applications. ASME A53 and A106 and API 5L seamless, electric resistance welding (ERW), and submerged arc welding (SAW) steel pipe are commercially available and most commonly used in pipeline systems. PVC, fiberglass, polypropylene, and other materials may be used in…[Leggi tutto]

The present paper reviews various investigations made by researchers in different stages of investment casting and highlights their importance. The paper initially highlights the investigations made on pattern wax properties, effects of blending, additives and fillers. Different ways through which pattern properties (like surface finish,…[Leggi tutto]

Although the mercury sphygmomanometer is widely regarded as the “gold standard” for office blood pressure measurement, the ban on use of mercury devices continues to diminish their role in office and hospital settings. To date, mercury devices have largely been phased out in US hospitals. This has led to the proliferation of non-mercury dev…[Leggi tutto]

If a valve may be required to remain in place closed on removal of the pipe on one side for a temporary operation, it must be flanged for bolting to a pipe flange on the other side. ‘Wafer’ butterfly valves whose bodies are sandwiched between pipe flanges do not achieve this. Use of such valves for isolation of air valves allows maintenance to…[Leggi tutto]

Concentric butterfly valves are bidirectional. Double offset and triple offset bi-offset butterfly are also bidirectional but with preferred flow (pressure) direction, such as flow from the stem side. Fig. 2.96 shows the preferred flow direction of a flanged end double offset butterfly valve.

Butterfly valves tend to be cheaper than…[Leggi tutto]

Fashion searches for rucksacks are up 37% month-on-month, according to global fashion search platform Lyst. In the UK the annual amount spent on backpacks has risen every year since 2014 when, according to global market research company Euromonitor International, the retail spend was £112m – it forecasts the 2019 figure will be £219.5m.…[Leggi tutto]

We compared patterns of bony and ligamentous injury with distal radial fractures in braced and unbraced wrists using 20 paired fresh cadaveric upper extremi ties. A commercially available wrist brace was placed on one wrist in each pair. Specimens were then placed in a fast-loading gravity-driven device and subjected to loads averaging 16 kg from…[Leggi tutto]

Acrylic nails are the definition of glamour in the beauty world, and pretty much anyone with eyes can see that. But are fake nails safe? Do acrylic nails hurt? How much do acrylic nails cost? And what are acrylic nails even made of, anyway? If you’re curious about acrylics and have never tried them before, it’s totally understandable if you hav…[Leggi tutto]

The use of properly designed screen and gravels are important and this paper is an important reference for the design of groundwater wells. In this study, the purpose of the circle method is to design water well and the benefits of sand control. The determination of screen slot size and its variation in the opening is often a major aim of…[Leggi tutto]

Blow Membrane is a plastic processing method, which refers to a plastic processing technology in which plastic particles are heated and melted and then blown into a film. Usually, the polymer is extruded to form a tubular film blank, which flows in a better melt flow. In the state, the tube film is blown to the required thickness by high-pressure…[Leggi tutto]