An anomalous behavior in the measurement of calcium with the smac multi-channel high-speed analyzer was eliminated by taking the diluted serum directly from the dilution loop of the instrument before it enters the stainless-steel riser.

Shrinkage defect in an alloy steel casting for marine engine cylinder cover was estimated by numerical analysis with reference to casting variables such as riser and chiller. Retained melt modulus was employed as a prediction parameter in this study. Shrinkage defects were developed at the final solidification region. This is associated with hot spots, which could be controlled more effectively...

In the conducted investigations, aluminium dross, i.e. solid waste formed in the production and recycling of aluminium, was used as one of the basic raw materials to obtain a material characterised by insulating and exothermic properties, applied to heat riser heads in the process of iron or steel casting. The product was obtained by filtrating the slurry. In the raw mix, aluminium dross played...

As a new type of riser connecting offshore platforms and submarine pipelines, steel catenary risers (SCRs) are generally subject to waves currents for long time, thus it is significant fully evaluate the SCR structure’s safety. Aiming at damage identification SCR, acceleration time series signals multiple locations taken as characteristics. The characteristics include spatial information measur...

Steel lazy wave riser (SLWR) is derived from the simple catenary (SCR) by installation of buoyancy modules on its section. Infinite SLWR configurations are possible, and this poses difficulties in determining best configuration. However, it possible to capture some suitable which satisfy given design criteria specific a project. We referred these as optimum for problem. Several advanced optimiz...

Riser sleeves are an effective tool in the steel foundry industry for minimizing riser size and increasing casting yield. Reliable simulation of the performance of riser sleeves requires accurate temperature dependent thermophysical properties. Unfortunately there is little or no such property data available in the open literature. A limited number of sleeve manufacturers provide advice and pro...

An experiment in a small-scale air-water test loop is performed to investigate the flow-induced vibration behaviors of flexible catenary riser conveying slug flow over wide range gas-to-liquid rate ratios from 1.0 4.5. The clamped-clamped model has an inner diameter 4 mm and aspect ratio with length about 360. non-intrusive high-speed cameras are employed simultaneously capture dynamics interna...