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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 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, dimensional accuracy, etc.) could be enhanced by properly controlling the injection processing parameters are thoroughly discussed. The paper also looks…[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]

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]

What are nuts used for? Both the bolt and the nut grip the materials being fastened, creating a bolt joint, with the nut also preventing axial movement.

The effect of the bolt joint comes down to the axial clamping force provided by the nut and the shank of the bolt, which acts as a rod that presses the joint against sideways shear…[Leggi tutto]

They used to be carried by the slightly awkward-looking kids in the school playground or hikers and were much more likely to be sported by men than women. But now, go to any high street, office or packed rush-hour bus and the humble backpack bag is everywhere.

Fashion searches for rucksacks are up 37% month-on-month, according to…[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 purpose of the study to obtained water well screens opening size and gravel packs size, and to access within the groundwater inter through the aquifer to the well screen and prevent running sand from entering the well. The use of properly designed screen and gravels are important and this paper is an important reference for the design 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]