Laterals, pipe

Whenever a change in piping direction occurs, the elevation of the pipe mn should also change. If the main piperack is at an elevation of 4 m, then the lateral piping can either go up to 5 m or drop down to 3 m. The piperack can also provide the support for air coolers and other equipment such as elevated dmms. 

The perforated pipe distributor comprises a central feed sump and pipes that branch out from the sump to provide the liquid discharge. The level in the sump varies with liquid total flow rate, and the size of the lateral pipes and their perforations must be determined carefully to ensure that the ends of the pipes are not starved for hquid. The orifices are typically 4 to 6 mm diameter, and can be subject to phigging if foreign matter is present. The pipes must be leveled carefully, especially for large diameter columns. 

In some cooling tower designs, the main hot water distribution pipe running the length of the tower and supplying other smaller (lateral) pipes. 

Always avoid installing process lateral piping into the SRV inlet piping. The SRV is normally sized and selected for the worst-case scenario that could... 

Distance between spray lateral piping, ft. Distance of nozzles from side of pond, unfenced, ft. 25 13 38... 

Figure 7-57 shows commonly used elevations for main yard heights at a yard piping intersection. Note that the 14-ft. elevation of the lateral yard permits turning up or down at the intersection. It is important to elevate lateral pipe banks between the two elevations of the main yard. 

The CIPP lining of lateral pipes are usually of 100 mm or 150 mm diameter and 5—20 m in length however, many of these pipelines have bends varying from 45° to 90°. 

The process of lining lateral pipes started as an extension of mainline CIPP lining in the 1990s. Initially, the nonwoven liner was impregnated with a polyester resin and dragged or pushed into the pipe. The installation operator would then use a piece of pipe to invert a calibration hose into the liner this is a PVC plastic tube liner that expands under water or air pressure to the size of the CIPP liner inside the pipe. Once the liner is cured, the calibration hose is removed leaving the cured liner behind. 

Pipe installations have a beginning and an end. Both are usually fixed connections. It is not wise to make fixed connections at the end of unrestrained pipe runs. You should stabilize the pipe run when it approaches a fixed connection. The distance from the fixed location to stabilize should be a minimum of 3 pipe diameters away from the rigid connection. By doing (his, the stress-concentrating effect of lateral pipe movement at the fixed connection is controlled. A consolidated earthen berm makes an effective stabilizer. 

Pipe racks should be located outside of areas enclosed by spUl retention walls/berms. Lateral pipe racks with interconnection to pipe racks parallel to accessways should be at least 24 meters apart if the laterals cross the accessways. This provides space for raising and lowering crane booms. 

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