Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of efw steel pipe dn80 in China. Welcome to buy discount efw steel pipe dn80 made in China here from our factory. Quality products and low price are available.
Product introduction
EFW: Customized Forming + Multi-Layer Welding
EFW (Electric Fusion Welded) is essentially a "large-diameter thick-walled customized process". It uses single steel plates as raw materials, and the forming process is similar to LSAW, but the welding is more precise. Huayang's EFW production line adopts a three-step welding process: root welding, filling welding, and cover welding, all using submerged arc welding technology. For the DN1200 thick-walled pipe produced for the 2023 Sinopec high-pressure project, the weld was welded in 5 layers, with each layer's temperature strictly controlled by an infrared thermometer to avoid cold cracks.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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