What are the differences between 3PE-coated steel pipes and epoxy coal tar pitch-coated steel pipes?
Release time:
2021-04-13
Today, let’s talk about the differences between 3PE-coated steel pipes and epoxy coal tar-coated steel pipes. Currently, 3PE coating and epoxy coal tar coating are two commonly used methods for external corrosion protection of steel pipes. The anti-corrosion performance of 3PE-coated steel pipes is superior to that of epoxy coal tar-coated steel pipes. Why am I making such a bold statement? Don’t worry—just keep reading.
Today, let’s talk about the differences between 3PE-coated steel pipes and epoxy coal tar-coated steel pipes. Currently, 3PE coating and epoxy coal tar coating are two commonly used methods for external corrosion protection of steel pipes. The anti-corrosion performance of 3PE-coated steel pipes is superior to that of epoxy coal tar-coated steel pipes. Why am I making such a bold statement? Don’t worry—just keep reading.
1: Service life
Generally speaking, 3PE anti-corrosion steel pipes can last around 30 to 50 years, whereas epoxy coal tar anti-corrosion steel pipes have a service life of less than 20 years—so there’s a difference of 10 years between the two.
2: Processing Technology
The primary raw materials for epoxy coal tar anti-corrosion coatings consist of epoxy coal tar primer and topcoat, as well as epoxy coal tar cold-wrap tapes. Epoxy coal tar anti-corrosion is commonly referred to as "three coats with two layers of cloth," "five coats with two layers of cloth," or "one layer of cloth with two coats." When applying epoxy coal tar anti-corrosion coatings to steel pipes, the coating is typically applied by brushing. Epoxy coal tar paint combines the high mechanical strength, strong adhesion, and chemical resistance of epoxy resin with the water resistance, antimicrobial properties, and resistance to plant root penetration inherent in asphalt. It is a high-performance anticorrosive and insulating coating that exhibits excellent resistance to chemicals and water. The main equipment used for 3PE anti-corrosion steel pipe production includes: steel pipe buffer platform, pipe-gripping unit, tractor, pipe-pushing machinery, high-pressure blasting machine, repair platform, transmission line, steel pipe preheating furnace, main unit inspection stand for shot-blasting machines, return transmission line for nonconforming pipes, fast-feed roller assembly, fast-discharge roller assembly, and inspection platform, among others.
3: Specification Comparison
For 3PE anti-corrosion coatings, the typical specifications for steel pipes range from 60 to 1820 mm. As for epoxy coal tar anti-corrosion coatings, there are no special requirements regarding steel pipe specifications. Generally, large-diameter steel pipes often make extensive use of epoxy coal tar anti-corrosion coatings.
Four: Price Comparison
The price of 3PE anti-corrosion coating is generally higher than that of epoxy coal tar anti-corrosion coating.
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