1. The spraying process of 3PE
anti-corrosion steel pipe
At present, most 3pe
anti-corrosion steel pipe manufacturers in my country adopt the production process of "epoxy powder spraying, adhesive and polyethylene lateral extrusion, winding roll pressing", because the powder and electrostatic thermal spraying method does not require rolling, It solves the problem of a thin coating on the welding seam of spiral welded steel pipes, saves equipment such as plastic extruders on the production line, and reduces energy consumption. Specific construction: The steel pipe after shot blasting and rust removal is heated to 210°C~220°C at a moderate temperature. At this time, the epoxy powder is still in a molten state, and the adhesive and PE are extruded into thin sheets through an extruder. It is sprayed, wound onto a steel pipe, and then flattened by a roller; the epoxy powder is in powder form, and adhesive and PE are in granular form, so only electrostatic spraying and plasticized extrusion winding methods can be used.
2. Paint surface construction of epoxy resin
anti-corrosion steel pipe
The coal tar enamel anti-corrosion layer is a kind of hot-coating anti-corrosion material. It is mainly composed of coal tar, washing oil, asphalt, etc., supplemented by additives. It has strong adhesion, low water absorption, good insulation, and resistance to bacterial corrosion. It has the advantages of resistance to penetration of plant rhizomes, resistance to petroleum and its products dissolution, resistance to soil stress, resistance to cathodic dis-bonding, and long life, so it is suitable for anti-corrosion of various underground pipelines. However, when the epoxy resin
anti-corrosion steel pipe paint surface is applied, it is necessary to open the thick paper bucket first, take out the block top paint and break it into small pieces that are heated and melted, and put it into a container with a stirrer to avoid contamination. Use an enclosed heater to heat slowly and evenly to avoid direct contact of the topcoat with the fire source.
3. Safety protection in the construction of
anti-corrosion steel pipes
Spraying is a highly dispersed paint mist and volatilized solvent. The fine particles in these spraying or spraying paint are easily inhaled into the lungs of the human body, thus endangering the health of the human body, ranging from discomfort, headache, dizziness, nausea, etc. Symptoms such as vomiting, loss of appetite, and lack of concentration can cause different degrees of toxicity to the human respiratory system, circulatory system, digestive system, and reproductive system. goggles to prevent splashed paint from entering the eyes and injuring the eyes; wear respiratory protective equipment such as gas masks or long-tube respirators; wear suitable chemical-resistant gloves, which can effectively protect hands from paint or other liquid damage.
