The sewage pipeline system is composed of pipes collecting and transporting municipal sewage and the attached structures. The sewage flows from the branch pipe into the main pipe, then into the main pipe, and finally into the sewage treatment plant. The pipeline from small to large, similar to the distribution of rivers, dendritic, and water supply network circulation through the situation is completely different. Sewage in the pipeline is generally by the water surface difference between the two ends of the pipeline flow from high to low, the internal pipeline does not bear pressure, that is, by gravity flow.

The flow characteristics of sewage in pipes and canals

The sewage in the sewage pipe contains a certain amount of organic matter and inorganic matter, among which the relatively small density floats on the water surface and drifts with the sewage; The heavier ones are distributed on the flow section and flow in suspension. The heaviest moves along the bottom of the pipe or deposits on the wall, a situation slightly different from the flow of clear water. But in general, the water content of sewage is generally more than 99%, and the proportion of suspended materials is less, so it can be assumed that the flow of sewage generally follows the law of water flow, and assume that the water flow in the pipeline is uniform flow. However, the measured results of water flow in sewage pipe show that the flow velocity in the pipe is variable. This is mainly because the pipeline is small. When the water flows through the bend, crossing, changing slope, changing diameter, falling water, and other places, the flow state changes, the flow rate is constantly changing, and the flow may also be changing. Therefore, under the above conditions, the water flow in the sewage pipeline is not uniform flow. But in addition to the above situation, on the straight pipe section, when there is no big change and no sediment flow, hydraulic elements of the sewage pipe (velocity, pressure, density, etc.) are not change over time and can be considered as a constant flow, and the pipe cross-section, shape, size unchanged, streamline for parallel straight lines, the flow state can be treated as uniform flow. If the design and construction, pay attention to improving the hydraulic conditions of the pipeline, the water flow in the pipe can be as close as possible to uniform flow.

Cangzhou Shenlong pipe production can implement the following standards:

SY/T0315-2013 Technical Standard for Weld bonded epoxy Powder Outer Coating on Steel Pipe

CAN/CSA-Z245.20 "FBE Coating for Steel Tube Outer Wall"

DIN30671 technical standard for fused epoxy powder outer coating on steel tubes and fittings

Cangzhou shenlong pipe manufacturing co., ltd. Is engaged in oil, gas, water, coal slurry mixing medium steel pipeline coating operations, anti-corrosion, insulation, piping is set in a body's specialized pipeline engineering precast construction enterprises, products used in an oil pipeline, chemical piping, electrical, pipe, gas pipe, heat pipes, sewage pipes, etc. Anti-corrosion processing of straight pipe and bend pipe DN40-3000 three-layer structure polyolefin (PE, PP, TPEP,3LPE) steel pipe coated with anti-corrosion, DN40-3800 steel hot stewed bend pipe and pipe fittings coated with FBE, epoxy resin coating anti-corrosion, DN40-3800 steel pipe inner wall resistance reduction, solvent-free epoxy steel pipe, epoxy paint anti-corrosion, Coated plastic steel pipe, dip plastic steel pipe. Lined with plastic steel pipe PE, PO, PP, PTFE, HDPE, polymer polyethylene corrosion. The company is in strict accordance with China Petroleum and Natural Gas SY/T0413-2002, national GB/T23257-2009, German DIN 30670, American AWWA C210, and other international and domestic anti-corrosion standards.