Anti-corrosion flange mainly adopts oil coating, galvanizing and plastic spraying and other anti-corrosion measures. Anti-corrosion flange can be divided into container flange and pipe flange according to the components connected, and integral flange, looper flange and thread flange according to the structural type.
The radiation crosslinked polyethylene thermal shrinkage band anticorrosive technology is mainly used for the anticorrosive flange. Radiation-cured crosslinked polyethylene heat-shrinkable strip of steel pipe is a new kind of corrosion-resistant material for stainless steel pipe weld, which has good performance and simple operation. It is composed of base material and hot-melt adhesive layer. Major Standards SY/T0413–2002 Technical Standards for Polyethylene Anticorrosive Coatings for Buried Steel Pipelines, SY/T4054–2003 Radiation Crosslinked Polyethylene Thermal Shrinkage Belt (Sleeve), SY/T0415–1996 Technical Standards for Hard Polyurethane Foam Plastic Anticorrosive and Thermal Insulation Coatings for Buried Steel Pipelines. The material of large anticorrosive carbon steel flange is mainly carbon steel, which is suitable for petroleum and natural gas transmission engineering and chemical industry.
The production technology of anticorrosive flange is mainly divided into forging, casting, cutting and rolling.
