corrosion of water and gas pipes is not desirable from the view point of health, economy and nuisances. there are many factors in soil which attack the metal pipes for corrosion. (steel, cast, iron and like). that is why the designer of metal pipes for conveyance of metal pipes for conveyance of water and gas should be aware of these factors and pay nutmost care in selection of pipes and protec...

Corrosion and scaling are among the problems that may arise when storing water in tanks. Several factors affect corrosion of water, which include pH, temperature, alkalinity, Ca2+ hardness, TDS, concentrations Cl–, SO42–, CO32–, HCO3–. Also, several indices can be measured using these properties such as Langelier saturation index, Ryznar Aggressive Larson, Scold quality Puckorius index. These i...

This paper reanalysed the 255 sets of geothermal two-phase flow data of Freeston et al (1983). A new void fraction correlation is proposed in this paper. The new correlation is derived from the analysis of two-phase flow velocity distribution using the Seventh Power Law as: To predict the two-phase pressure drop, an equivalent pseudosingle-phase flow having the same boundary layer velocity dist...

The inner walls of the drinking water distribution system (DWDS) are expected to be clean ensure a safe quality water. Complex physical, chemical, and biological processes take place when comes into contact with pipe surface. This paper describes impact leaching different compounds from supply pipes subsequent risks. Among these compounds, there heavy metals. It is necessary prevent metals gett...

Corrosion can be affected by flow differently depending on the mechanism governing the corrosion process. Two major cases can be distinguished: the effect of flow on corrosion when no surface films are present and the effect of flow on corrosion in the presence of surface films (precipitates, inhibitors, etc.). In the absence of films, the primary effect of flow on corrosion is through mass tra...