Anti-corrosion steel pipe according to the processing types are:

1, oil and gas 3pe steel pipe anticorrosion, two layer polyethylene (2PE) steel pipe anticorrosion. Standard: SY/T0413-2002DIN30670

2, oil and gas FBE anti-corrosion steel pipe (single-layer fused epoxy powder anti-corrosion), 2FBE (double-layer fused epoxy powder anti-corrosion) steel pipe. Standards: SY/0315-97, SY/T0315-2005

3, water supply pipeline cement slurry lining steel pipe inside anti-corrosion. Standard: CECS10:89

4, epoxy coal asphalt glass cloth steel pipe anticorrosion. Standard: GB50268-97SY/T0447-96

5, water supply pipeline IPN8710 polymer non-toxic coating steel pipe inside anti-corrosion. Standard: SY/T0457-2000

6, sales of epoxy coal asphalt anticorrosive paint, IPN8710 paint, chlorinated rubber anticorrosive paint, polyurethane anticorrosive paint, and other anticorrosive paint.

7, high-density polyethylene polyurethane foam insulation steel pipe. Standard: SY/T114-2000SY/T115-2001

Anti-corrosion steel pipe according to the type of anti-corrosion:

2PE/3PE anticorrosion: Pipeline three-layer PE anticorrosion structure: layer epoxy powder (FBE > 100um), two-layer adhesive (AD) 170 ~ 250um, three-layer polyethylene (PE) 2.5 ~ 3.7mm. The three materials are integrated and firmly combined with the steel pipe to form an excellent anti-corrosion layer. Pipe diameter range Φ60 ~ Φ14202PE anti-corrosion: pipe two-layer PE anti-corrosion structure, layer adhesive (AD), two-layer polyethylene (PE), the two materials are integrated, the thickness of each layer is the same as that of three-layer PE.3PE anti-corrosion (three-layer polyethylene) process is the first anti-corrosion technology introduced from outside in the late 1990s. Its full name is fused epoxy/extruded polyethylene structural protection layer. 3PE anticorrosion technology combines the excellent properties of epoxy coating and extruded polyethylene anticorrosion layer, combining the interface characteristics and chemical resistance of epoxy coating with the mechanical protection characteristics of extruded polyene anticorrosion layer, thus significantly improving their respective properties. Its features: high mechanical strength, wear resistance, corrosion resistance, heat resistance, cold resistance, can be applied to 150 degrees in the medium, in the cold zone are adapted. Therefore, 3PE anti-corrosion layer is an ideal protection layer for buried pipelines. According to the inspection of the authoritative department, the buried pipeline life with 3PE anti-corrosion technology can be up to 50 years. 2PE anti-corrosion (two-layer polyethylene) Pipe two-layer PE anti-corrosion structure, layer adhesive (AD), two-layer polyethylene (PE), the two materials are integrated, and the thickness of each layer is the same as that of three-layer PE. It can be seen that the difference is that 3PE anticorrosion has an epoxy powder layer, and the epoxy powder has good corrosion resistance, good mechanical properties, strong resistance to cathode stripping, although it has the advantages of strict surface treatment, poor weather resistance, high water absorption, but it is suitable for buried pipeline submarine pipeline, the thickness of the coating layer is only 0.3 ~ 0.5 mm, and the service life can reach 40 ~ 50 years.

Second, the prefabricated polyurethane insulation layer is a rigid polyurethane foam with a density of 60kg/m3*80kg/m3, which fully fills the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer casing and the insulation layer form a solid whole. Polyurethane foam has good mechanical properties and adiabatic properties, usually can withstand temperatures of 120℃, by modification or combined with other thermal insulation materials can withstand temperatures of 180℃. Rigid polyurethane insulation tube is a kind of insulation tube shell made of black material and white material mixed with foam.

(1) The main components of the white material are phosphorus-containing polyether resin, glycerin polyether resin, glycol polyether resin, in addition, flame retardants, foam stabilizer and catalysts need to be added.

(2) The main component of black material * is polyphenyl polyisocyanate, with a purity of 90%.

(3) The outside layer of glass steel is the moisture barrier in the insulation structure, which is made of glass fiber cloth impregnated resin, and has strong weather resistance and corrosion resistance, and also has strong hardness

Third, single layer epoxy powder anticorrosion Single layer epoxy powder anticorrosion is a new anticorrosion layer developed in the past 30 years, the use of electrostatic spraying process coated epoxy powder coating, a film. The coating has the advantages of simple coating operation, no pollution, good impact resistance, good bending resistance and high temperature resistance, and has been widely used outside.

Single-layer epoxy powder anticorrosive steel pipe products are used in:

Coal mine: suitable for coal mine underground water supply and drainage, underground shotcrete, positive and negative pressure ventilation, gas extraction, fire sprinkler and other pipe networks. Power plant: thermal power plant process water waste residue, return water transmission pipeline. Fire protection: for the anti-spray, sprinkler system of the water supply pipeline has the best applicability.

Highway: electric power, communication, highway and other cable protection sleeve.

Municipal engineering: applicable to high-rise building water supply, heat supply network heating, tap water engineering, gas transmission, buried water and other pipelines.

Oil: oil transmission pipeline, chemical and pharmaceutical, printing and dyeing industries to transport corrosive media process pipeline.

Sewage treatment: sewage treatment discharge pipe, sewage pipe and biological tank anticorrosion engineering. Agriculture: agricultural irrigation pipe, deep well pipe, drainage pipe and other networks.

4. 2PP/3PP anti-corrosion

3PP anticorrosion: Pipeline three layers of PP anticorrosion structure: layer epoxy powder (FBE50 ~ 100um), two layers of adhesive (AD) 250 ~ 400um, three layers of polypropylene (PP) 1.4 ~ 4.0mm. The three materials are integrated and firmly combined with the steel pipe to form an excellent anti-corrosion layer, and the use temperature of the anti-corrosion layer can reach 110 degrees.

Pipe diameter range Φ60 ~ Φ1420

2PP anti-corrosion: Pipeline two-layer PP anti-corrosion structure: layer adhesive (AD), two-layer polypropylene (PP), the two materials are integrated, and the thickness of each layer is the same as that of three-layer PP.