Product characteristics of inner and outer plastic-coated steel pipes and transportation requirement

the inner and outer walls of plastic-coated steel pipes are coated with epoxy resin, the surface is smooth, the fluid resistance is reduced, the flow rate is increased, no scale is formed, and microorganisms generally do not grow. the service life of the fire water supply (gas) pipeline is greatly improved by coating the water delivery, buried pipe, acid, alkali, and salt corrosion of the fire water supply (gas) pipeline with plastic. the service life can reach more than 50 years. the fire pipe pressure range is 0-2.5mp. fire protection plastic-coated steel pipes are based on steel pipes. the outer wall adopts a thermosetting powder coating, which has high adhesion, impact resistance, corrosion resistance, and weather resistance. the inner wall is made of thermoplastic powder coating with high adhesion, corrosion resistance, and food-grade hygiene. the inner and outer plastic-coated composite steel pipes for water supply are manufactured by sandblasting chemical double pretreatment, preheating, inner and outer plastic coating, curing, post-treatment, and other processes. it is a cost-effective product upgraded from traditional steel-plastic pipes and galvanized pipes. the products have passed the professional certification of the national solid fire extinguishing system and the quality inspection center of fire-resistant components.

by coating steel pipes or galvanized pipes with plastic for anti-corrosion, the problems of corrosion and scaling in the process of embedding and transportation of ordinary steel pipes are solved. eliminate pipe blockage and spray blockage, improve the service life of the pipe, and the service life of the plastic-coated steel pipe can reach more than 50 years. the powder coating for plastic-coated steel pipes is added with a flame retardant and modified by epoxy resin powder. the coating has excellent temperature resistance and will not burn or soften after long-term use.

product features of plastic-coated steel pipes inside and outside:
1. hygienic, non-toxic, non-polluting, micro-organism-free, ensuring fluid quality
2. resistance to chemical corrosion, soil, and marine biological corrosion, cathodic stripping
3. the installation process is mature, convenient, and fast, similar to the connection of ordinary galvanized pipes
4. extremely flame retardant, non-combustible at 300°c
5. the pipe wall is smooth, which improves the conveying efficiency and has a long service life

technical parameters:
coating material: modified heavy-duty epoxy resin
general color: red
coating thickness: 250um-550um
coating method: internal and external spraying
product specification: dn15-dn1200
ambient temperature: -30°c-80°c (peak value: 760°c); conventional pressure: 0.1mpa-2.5mpa

hot-dipped plastic steel pipes shall not be violently thrown and hit during transportation. nylon straps are used for hoisting during loading and unloading. hot-dipped plastic steel pipes should be stacked indoors or in a cool place. when stored in the open air, it should be covered with a canopy and kept away from heat sources and fire. do not stack them in direct sunlight or cold outdoors for a long time. do not mix with toxic and harmful substances.

precautions for hot-dipped plastic steel pipes: the pipes that convey hot water can convey cold water, and the pipes that convey cold water cannot convey hot water. the cross-section of plastic-coated composite pipe shall not be in contact with water, non-plastic lined fittings shall not be used instead of plastic-lined pipe fittings, plastic-coated fittings in malleable iron fittings shall not be used, injection joints shall be provided in raised-face rebar flanges, special transition pieces and the threaded connection of the valve port adopts a special transition piece, the connection with the water supply bolt adopts a special rubber sealing ring, and the groove connection adopts a special rubber sealing ring.