ERW is a general term for electric resistance welded steel pipes. Electric Resistance Welding (ERW for short) ERW is divided into “ERW steel pipes” and “ERW steel pipes” which are straight seam electric resistance welded. Electric Resistance Welding in English is abbreviated as ERW. It is used to transport gas and liquid objects such as oil and natural gas. It can meet various high and low-pressure requirements and currently occupies an important position in the field of transportation pipes in the world.
First, the performance of ERW high-frequency straight seam steel pipe
Diameter of ERW high-frequency straight seam steel pipe: Φ114-Φ356mm (4″-14″)
Wall thickness of ERW high-frequency straight seam steel pipe: 3.0-12.7mm (1/8″-1/2″)
Standards of ERW high-frequency straight seam steel pipe: API, BS, ASTM, JIS, DIN, GB, ISO, DNV
Material of ERW high-frequency straight seam steel pipe: GB/T9711 L190-L555 (API 5L A-X80)
Second, the main use of ERW high-frequency straight seam steel pipe
Oil and gas transportation: Long-distance oil and natural gas pipelines, such as some sections of the China-Russia East Line Natural Gas Pipeline Project use ERW steel pipes, and their strength and sealing ensure safe and efficient transportation of oil and gas.
Building structure: Pipes for building structures, such as the main structures of large stadiums and exhibition halls, whose strength and toughness meet the requirements of building structure bearing and earthquake resistance.
Municipal engineering: Construction of municipal pipe networks such as urban water supply, drainage, and gas, such as urban sewage pipes, whose corrosion resistance ensures long-term and stable operation of pipes in harsh underground environments.
Mechanical manufacturing: Structural parts in the field of mechanical manufacturing, such as crane booms, automobile beams, etc., whose good processing performance meets the needs of mechanical parts molding and use.
Third, anti-corrosion treatment of ERW high-frequency straight seam steel pipes
3PE anti-corrosion: The structure is a bottom layer of epoxy powder, an intermediate layer of adhesive, and an outer layer of polyethylene. It combines the chemical corrosion resistance of epoxy powder, the adhesion of adhesives, and the mechanical protection of polyethylene, with a good anti-corrosion effect and long service life.
Epoxy powder coating: The coating thickness is generally 100-400μm, with excellent chemical corrosion resistance, good adhesion, and impact resistance, and can effectively protect steel pipes from corrosion.
IPN8710 anti-corrosion coating: non-toxic, anti-corrosion, chemical corrosion resistant, suitable for drinking water projects and other occasions with high hygiene requirements.
Fourth, the performance characteristics of ERW high-frequency straight seam steel pipe
Strength: ERW steel pipe has high yield strength and tensile strength, such as the common B steel grade (L245) yield strength ≥245MPa, tensile strength 415-560MPa, which can be used to transport oil and gas and other media.
Toughness and toughness: Good toughness enables it to withstand certain impact loads, Charpy impact energy ≥100J, meeting the use requirements of a low-temperature environment.
Corrosion resistance: After proper anti-corrosion treatment, it can resist corrosion from media such as acid, alkali, and salt, and extend its service life.
Post time: May-14-2025