As city gas source will soon by the artificial coal gas as the main to give priority to the direction of the development process of gas, many cities face gas source, pipeline network reconstruction and new pipeline network how to apply it.
Because natural gas artificial and gas composition is different, it does not contain heavy hydrocarbons and water, and at the same time due to the use of natural gas, pipeline pressure increase, many cities artificial coal gas pipe network shall not apply to the original natural gas.According to some urban gas source conversion, the main problems of switching from artificial gas to natural gas pipeline network are:
1, cast iron pipe interface leakage, this problem is transformed the possibility of the frequency of which is the most serious problem, most domestic city of shenyang, jinzhou, such as natural gas leakage accident has occurred, the main reason is that exist in the artificial coal gas, dust and water vapor hydrocarbon on the interface of the rubber ring, oil hemp has moist effect, rubber ring, oil flax be affected with damp be affected with damp and saturated inflation, increased the sealing of the interface, even if has a small leak point will be blocked.After the pipeline USES natural gas, the interface filler contracts and leaks.
2. Leakage of indoor galvanized pipe, since the thread filling is made of hemp white lacquer, after the transformation, the sealing performance is affected by the water loss caused by the white paint, resulting in leakage.
3 impurities float in the sky, and the pipe due to the original medium in pipeline as the artificial coal gas, in the artificial coal gas condensation water and oxygen, produce rust, and unavoidably have left mud during pipeline construction, under the action of condensed water and aromatic hydrocarbon, adhesion in the bottom of a tube, gradually become dry, converted the pipe rust, dirt over gas flow in pipe float in the sky, the dust and impurities may clog the downstream piping, and affect the valve, pressure regulator, compressor, failure, rust can also affect add smelly effect.
