Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of efw steel pipe dn80 carbon steel pipe in China. Welcome to buy discount efw steel pipe dn80 carbon steel pipe made in China here from our factory. Quality products and low price are available.
Product introduction
Why Is ERW a "All-Rounder" for Medium-Small Calibers?
ERW's leading position isn't just about speed and cost-it's about matching the most common market demand. 70% of industrial and municipal projects need DN100-DN500 medium-small caliber pipes, which is ERW's "comfort zone".
For low-temperature scenarios, hfw steel pipe (a high-frequency variant of ERW) shines. Here, hfw meaning is "high-frequency electric resistance welding" (300-500kHz), which heats edges at 1000℃/s, minimizing grain coarsening. Huayang's 2024 Harbin Winter Gas Pipeline Project used 5,000 tons of HFW pipes-their -20℃ impact toughness reached 35J, 10% higher than SAW, with no brittle fractures at -30℃. For medium-pressure gas pipelines (3MPa), HFW's uniform weld structure also outperforms SSAW's spiral stress concentration.
When customers ask "what is erw pipe suitable for", we show them Huayang's project map: 200,000 tons of ERW for Shijiazhuang municipal water, 15,000 tons for Henan irrigation, 8,000 tons of HFW for Harbin gas-all verifying its adaptability to medium-low pressure, low-temperature, and large-batch scenarios.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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