With the development of urbanization and reconstruction of the old city, it is difficult to bury all pipelines such as water supply and gas under th ground, so the traditional pure epoxy coating can not meet the weather resistance when exposed to the outside. In addtion, the introduction of National Standard GB/T 37594-2019 (Technical Specification on Anticorrosive Outer Coating of Three-layer UV Resistant Fusion Bonded Powder Coating  for Steel Pipelines) make it easier to develop and product polyester resin for pipelines. At present, the company is developing such pure polyester resin and looking forward to cooperating with customers to develop and promote polyester resin in this field.