C76M Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe (Metric) C150/C150M Specification for Portland Cement. C260/C260M Specification for Air-Entraining Admixtures for Concrete. C309 Specification for Liquid Membrane-Forming Compounds for Curing Concrete Where heavy prolonged rains are anticipated, a continuous longitudinal drain along the back of the wall may be used in addition to through-wall drains. Climate, soil conditions, exposure and type of construction determine the need for waterproofing the back face of retaining walls. Surgical drains are implants that allow removal of fluid and/or gas from a wound or body cavity. This broad definition includes nasogastric tubes, urinary catheters, vascular access ports, and...
Dec 17, 2020 · Stormwater is urban runoff water that has picked up pollutants as it flows through the storm drain system–a network of channels, gutters and pipes that collect runoff from City streets, neighborhoods, farms, construction sites and parking lots–and empties directly into local waterways. This is generally used when pure countercurrent flow is required in a two tube side pass unit. This is achieved by having two shells side passes—the two passes being separated by a longitudinal baffle. The main problem with this type of unit is thermal and hydraulic leakage across this longitudinal baffle unless special precautions are taken.