Ductile iron pipe manufacturer of ductile iron pipe corrosion protection coating 1. asphalt paint asphalt paint coating is used to transport the gas pipeline. Before painting the pipe by warming can improve paint adhesion of asphalt, and accelerate drying. 2. The cement mortar lining + special anti-corrosion coating such measures are applicable to convey sewage pipes, can improve the corrosion resistance lining. 3. coal tar epoxy coating of coal tar epoxy coating both for the gas pipeline, but also for sewers. It is a two-component coating which has a high adhesion and a very smooth surface 4. The ceramic epoxy lined ceramic epoxy lining applicable to sewage pipes and gas pipes DN800 ductile iron pipe, but because manufacturing process is difficult and costly, so there are some limitations on use. Ceramic epoxy lined with high adhesion and finish is an excellent anti-corrosion coating. 5. aluminate cement coating or sulfate cement coating these two special cement coatings are suitable for use in the sewers of ductile iron pipe, ductile iron pipe corrosion, improve the ability to resist erosion acid wastewater constituents. 6. The polyurethane coating is an environmentally friendly to adapt to the needs and developed a new type of green special coating, good wear resistance and corrosion resistance. After nearly 10 years of development DN900 ductile iron pipe, cast-iron pipe quality domestic sphere ball cast-iron pipe is close to the level of developed countries. The so-called "near" and not "reach", that there is a gap. The main difference in the quality of the performance of cast-iron pipes inside and outside the ball and finish inside and outside coating. I had a few carefully observed certain production scale and high visibility of the domestic sphere cast-iron pipe manufacturers of products found to have a superficial appearance of slag, porosity and other defects dispersed gas pit DN1000 ductile iron pipe, cast pipe wall with cracks, and even slag layer thicker. I believe that such defects ball cast-iron pipe, because the result of a lack of hot metal purity. "Hot metal purification" theory: the purity iron is internal to the product quality that the decisive factor. Therefore, to improve the purity iron ball is the key to producing high-quality cast-iron pipes, while the production of high quality ball prerequisite cast-iron pipe products to international markets. DN700 ductile iron pipe, ductile iron pipe, DN1100 ductile iron pipe is provided by virtue of Liaocheng Industry Co., Ltd. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) strong, credible, Liaocheng in Shandong steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead virtue of Industry and you work into the brilliant, for a better future! You can also access (www.meidegc.com/supply_details_48654800.html), for more information about the company.