Epoxy coal pitch anti-corrosion steel pipe manufacturer Hebei manufacturer

With the construction of long-distance river bottom or submarine water transmission pipelines connecting the well pipelines between the water intake head in the center of the river and the shore, sewage deepwater discharge pipelines, underwater steel pipe anti-corrosion coatings have developed rapidly. Such as epoxy coal pitch, epoxy powder, polyethylene adhesive tape, yellow-green jacket and chlorinated rubber paint film, etc. Epoxy coal pitch anti-corrosion coating is a special series of coating products with the main characteristics of thick film, long-lasting effect and suitability for severe corrosive environmental conditions. This anti-corrosion coating has good and stable anti-corrosion properties in underwater pipeline engineering, and is especially resistant to corrosion from seawater and river water. It is widely used as a long-term anti-corrosion coating for steel structures at home and abroad in harsh corrosive environments. It is used in underwater steel pipelines. It has also been widely used in anti-corrosion projects. For example, the two pipes D and D laid in the sewage interception project in Zhenjiang City in 2018 have a total length of The external anti-corrosion of the water pipelines across the river (hereinafter referred to as the water supply project) all uses epoxy coal pitch coating and has achieved good results. Technical requirements for external anti-corrosion construction of steel pipes) Rust removal is strictly in accordance with the provisions of B "Specifications for Surface Treatment of Steel Materials Before Coating". After mechanical shot blasting and rust removal, the surface of the steel pipe must have a minimum surface roughness of . After the surface treatment of the steel pipe, the dust on the surface should be cleared away. The welds should have no welding nodules, no edges and no burrs. If there are no welding nodules, the edges and burrs should be smoothed with an electric grinder. ) Apply primer to the steel pipe after passing the rust removal. Use a roller brush to apply primer. The primer should be applied evenly without leakage or sagging. The interval should not exceed 1 hour. In bad atmospheric conditions, the interval should be shortened to 1 hour. Leave bare pipes at both ends of each pipe and only apply primer on the left and right sides to prevent corrosion of the joints. Before applying primer, you must obtain the consent of the supervision engineer. ) Putty When the outer anti-corrosion layer of the steel pipe uses glass cloth as the reinforced base fabric, after the primer is dry, put putty on both sides of the weld higher than the surface of the steel pipe to form a smooth transition surface. Putty is made by adding talcum powder to the rubber compound with curing agent and mixing thoroughly. When preparing the putty, diluent should not be added and the prepared putty should be used up within 1 hour. ) The rubber used in the ingredients must be prepared by a dedicated person according to the formula provided by the manufacturer. The prepared rubber should be used up within 1 hour. The prepared paint is not allowed to be used after . hours. The prepared rubber must be fully matured according to product requirements before use. In order to improve the hardness, about % aggregate (quartz powder) can be added. ) After applying glue and wrapping the glass cloth with putty, the mechanical dipping and winding method is used for external anti-corrosion. The steps are to use glass cloth soaked with glue to wrap the structure layer, press the edges, and overlap the cloth ends. Finally, wrap a layer of decorative fabric and apply the final layer of glue. The glass cloth is required to be tightly wrapped, with a smooth surface, no pores, no cracks, no wrinkles and hollows. ) Maintenance and Precautions The maintenance time of the FRP anti-corrosion layer is d or less curing days, d curing days, d or more curing days. Pipes that have not met the maintenance time requirements shall not be used in advance. It is strictly prohibited to carry out open-air operations in rain, fog, snow and strong winds. The ambient temperature of FRP construction should not be lower than the required ambient temperature. When the ambient temperature is lower than the required ambient temperature, low-temperature formula should be used. All defects in the anti-corrosion layer and parts damaged during inspection should be completely repaired before the pipeline is transported to the burial site and re-inspected before being transported to the construction site.
Product Features This product is a high-performance anti-corrosion coating with smooth, dense and hard coating, strong adhesion, salt-alkali resistance, seawater resistance, soil microbial corrosion resistance, and plant root penetration resistance. The combined use of paint and fiberglass cloth can enhance the mechanical properties of the anti-corrosion layer. Coating at room temperature and curing naturally is easy to apply and can be applied manually or mechanically. It is especially suitable for on-site use.
Anti-corrosion pipe protection. Anti-corrosion pipes must not be handled until the anti-corrosion layer is fully dry. When loading and unloading anti-corrosion pipes, only soft slings can be used to contact the anti-corrosion pipes. When stacking anti-corrosion pipes, sandbags and wooden pads should be placed at both ends and the middle of the pipes to isolate the outer walls of the pipes and the ground. Anti-corrosion pipes should be buried in the ground in time for use. If they are stored for more than one month, they should be covered with tarpaulin to avoid exposure to the sun and rain. If they are stored for more than half a year, they should be painted with a layer of epoxy coal tar topcoat before use.