Also known as prefabricated buried pipe insulation pipe insulation in two ways: a plastic sleeve steel pipe insulation ( high density polyethylene pipe insulation buried ) with steel jacket pipe insulation ( high temperature steam pipe insulation ) . Also known as prefabricated buried pipe insulation pipe insulation in two ways: a plastic sleeve steel pipe insulation ( high density polyethylene pipe insulation buried ) with steel jacket pipe insulation ( high temperature steam pipe insulation ) .
1 , plastic sleeve steel pipe insulation is made ??of high density polyethylene jacket tube , polyurethane foam pipe insulation and working closely together to airgel insulation or insulation mat plus high-pressure polyurethane foam composite solutions .
2 , steel jacket pipe insulation is protected from the outside pipe coating steel pipes , polyurethane foam insulation and pipe work together , or a combination of the airgel insulation mat plus high-pressure polyurethane foam composite solutions .
Protection of buried pipe insulation : Buried steel casing pipe insulation corrosion level shall be determined according to local soil corrosion levels. When buried pipe insulation loam soil corrosivity level is high, the level of anti-corrosion characteristics should be considered to strengthen the level , when the soil corrosivity class when , corrosion level should consider strengthening grade, when the soil corrosivity level is low when the corrosion level should be considered ordinary level . So be sure to find out the design of soil erosion level segment of pipeline laying for corrosion level optimization.
Cathodic protection of buried pipe insulation in metal corrosion process is electrochemical protection method . With other buried insulating pipe corrosion process is different, it is protected through the metal body to the applied current , so that the electrode potential is shifted negatively protective metal body , the metal lost by the ion atomic states spontaneous attitude becomes a trend , and thus the occurrence of corrosion inhibition fundamentally . But this process must be carried out in the electrolyte , thus very suitable for buried pipes taken cathodic protection. Cathodic protection and the pipeline itself buried pipe insulation coating complement each other , the presence of anti-corrosion layer can greatly reduce the consumption of current cathodic protection , and can compensate for the lack of cathodic protection coating integrity issues, resulting in safety and economy to achieve the perfect combination , is now recognized as the best antiseptic solution.