The Purpose of Coating and Coating Steel Pipe

In order to prevent the corrosion and improve transportation efficiency and ensure drinking water quality, in recent years, the international steel pipe coating technology progress quickly. Steel pipe coating inside coating and two kinds of outer wall coating. According to the purpose and use environment choose coating material. Large diameter steel pipe coating material recommended wall with solvent (mainly) epoxy resin and synthetic resin mortar lining. The former is used for line pipe, water pipe, which is mainly used for water pipe. The outer wall coating is mainly asphalt coating, polyethylene coating, epoxy resin coating, etc. (for line pipe), and zinc rich paint or tar epoxide is used in the pipe pile. Recently in the sea to lay a pipe pile started using polyethylene coating steel pipe, this is because the PE coating on corrosion resistance and anti Marine biological adhesion performance is good, and can reduce the production cost.

Pipeline steel pipe internal coating are two: the purpose of it is resistant to corrosion of oil and gas, 2 it is to improve the efficiency of the flow. Because of the large steel pipe inner surface roughness, coating can decrease the flow resistance of medium to reduce power consumption, reduce transportation costs and can increase pressure pump station spacing, to save the engineering investment.

Water pipe inside coating in addition to improving the efficiency of the flow, when the tap water, do not lower the quality of drinking water, not dissolved zinc impurities such as water pollution. General large diameter wall with mortar, small diameter tube plastic coated after galvanizing.

Steel pipe pile pipe is not inside coating, coating outside to improve the corrosion resistance.

Oil well pipe internal coating to increase resistance to oil, gas, corrosive, outside also to corrosion resistant coating.

There are natural resin coated material, the type of solvent synthetic resin coating, synthetic resin, inorganic matter (cement slurry) and metals (zinc, aluminum plating, Galfan galvanized aluminum alloy), etc.

Hunan Great Steel Pipe Co.,ltd would like to supply many kinds of coating steel pipe with high quality.