| Formulation and sudden collapse of vapor bubbles in a liquid; usually resulting from local low pressures – as on the trailing edge of a propeller; this develops momentary high local pressure which can mechanically destroy a portion of a surface on which the bubbles collapse. |
Closed circuit television used to carry out internal inspection and survey of pipelines.
Electrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The call includes the external circuit which permits the flow of electrons from the anode toward the cathode (See Electrochemical CellElectrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The call includes the external circuit which permits the flow of electrons from the anode toward the cathode (See Electrochemical Cell).).
Method of identifying plastic materials, such as polyethylene, as specified by ASTMAmerican Society of Testing and Materials; technical organization formed for the development of standards on characteristics and performance of materials, products, systems and services, and the promotion of related knowledge. D 3350, where the Cell ClassificationMethod of identifying plastic materials, such as polyethylene, as specified by ASTM D 3350, where the Cell Classification is based on these six properties: (1) Density of Base Resin (2) Melt Index (3) Flexural Modulus (4) Tensile Strength at Yield (5) ESCR (6) Hydrostatic Design Basis and Color. is based on these six properties: (1) Density of Base ResinPlastic materials prior to compounding with other additives or pigments. (2) Melt IndexThe melt flow of a thermoplastic material as determined under Condition E of ASTM D 1238. Condition C or high load melt index produces a higher melt flow for a given material as a result of the greater force applied to the sample during the test. (3) Flexural ModulusThe slope of the curve defined by flexural load versus resultant strain. A high flexural modulus indicates a stiffer material. (4) Tensile StrengthThe pulling stress in psi that is required to elongate a given specimen to the breaking point. at Yield (5) ESCR (6) Hydrostatic Design BasisHydrostatic design basis can be defined as the normalized long-term strength or calculated hoop strength of the material at 100,000 hours obtained by long-term hydrostatic testing of pipe samples from which the probable safe life of the pipe at various stress levels (working pressures) and at various temperatures can be predicted. and Color.
A pipe or series of pipe which collect wastewater which leaks, seeps, or flow into subgrade parts of structures and discharge them into a building sewers or by other means dispose of such wastewaters into sanitary, combined or storm sewers (Referred to also as “basement drain”).