Introduction: With the popularization of gas, the construction and protection of gas pipeline engineering is very important. The supporting equipment also includes insulating flanges. Like insulating joints, insulating flanges are products for the petroleum and chemical industries.
With the popularization of gas, the construction and protection of gas pipeline engineering is very important. The supporting equipment also includes insulating flanges. Like insulating joints, insulating flanges are products produced for the petroleum and chemical industries.
The insulating flange has a simple structure and is safe to use. However, the insulating flange also has the difference between the old-fashioned insulating flange and the new insulating flange. The industrially developed advantages are the reduction of the production cost and the improvement of the product quality. Comparison of new and old versions of insulating flanges can better illustrate this point.
Vintage insulating flange
The composition of the old-fashioned insulating flange: between the two butt-welding plane flanges, flange insulating gaskets are installed, and insulating sleeves and insulating bolt gaskets are added to the fastening bolts. Its flange insulation gasket material is made of oil-resistant rubber asbestos board, neoprene rubber board, fabric base neoprene rubber board and PTFE material. Insulation bolt sleeves and bolt insulation gaskets are made of high-strength phenolic laminates and cloth tubes. Its characteristics are: good steel, stable insulation properties, need a special installation location dedicated installation, high cost.
New insulating flange
Appropriate improvements have been made to the structure of old insulating flanges. In the city gas transmission and distribution project, the pressure of the city gas transmission and distribution project is low (PN ≤ 2.5MPa) and the pipe network pressure PN ≤ 0.4MPa is improved. In the pipe network transmission and distribution project, steel flat flanges are used instead of butt welding plane flanges, flange insulation gaskets are made of PTFE, oil-resistant rubber asbestos pieces, neoprene rubber, etc., and the fastening bolts are insulated. The sleeve and the insulation pad will be two, and half of the insulation sleeve will be shortened to make an integral high-strength insulation sleeve. It not only saves the engineering cost, but also saves the on-site installation position. It is a simple and applicable new type of insulating flange, and the construction cost is particularly low.
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