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The company has four internationally advanced HFW and ERW welded pipe
production lines, including Φ60, Φ168, Φ273, Φ660, etc., which can produce ERW steel pipes
with an outer diameter of 21.3-660mm, wall thickness of 1-20mm, length of 6-18m, material
S235, S355, Q345A, B , C, D, L245-L450, B-X70, with an annual production capacity of 300,000
tons. HFW/ERW products are mainly used in petroleum, natural gas, water, steam, urban gas
transmission, urban pipeline network, chemical industry, electric power, steel structure and
other industries.
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The factory has introduced a complete set of JCOE and HME production lines for
straight seam double-sided submerged arc welded steel pipes, specializing in the production
of thick-walled and large-diameter straight seam double-sided submerged arc welded steel
pipes and T-shaped welded pipes. The product specifications are OD324mm-OD7000mm, wall
thickness 6mm-200mm, length 3m-70m, with an annual production capacity of 500,000 tons.
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Adopts continuous axis contorting J-C-O(J-ing, C-ing and O-ing)process with
characteristics of high forming accuracy and efficiency as well as balanced distribution of
forming stress.Which can produce straight seam welded pipe with OD: Φ356~Φ1626mm,WT:6~50mm.
The main equipment such as pre-bending is provided by Tianshui forging and pressing machine.
The pre-welding adopts high-power CO2 gas shielded welding and high-speed full-length
pre-welding process. It adopts Lincoln multi-wire DC/AC automatic submerged arc welding
machine, and is equipped with steel plate automatic flame cutting machine, steel pipe
straightening machine, steel pipe finishing machine, and steel plate online manual UT flaw
detection. It is mainly used for transportation pipes for petroleum, chemical, natural gas,
electric power, city gas, water supply and drainage, etc. It is also widely used in
construction, bridges, wharfs and other engineering fields.
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The production line is formed by "CCO" using the mandrel rolling method, and
is formed by the cold expansion process after welding, and is formed by a
three-roll/four-roll bending machine. It can produce straight seam welded pipes with an
outer diameter of Φ324mm-Φ7000mm , wall thickness of 8mm-200mm, and a length of 3m-7m.
Pre-heat treatment, and then use single wire and multi-wire for inner direct welding, outer
direct welding, inner girth welding, and outer girth welding. The feature of this production
line is that the product has a large wall thickness and large diameter, which can be widely
used in structural pipes, such as steel structure bridges, offshore platform equipment,
super-long pipe piles, etc.
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Company now has 8 spiral steel pipe production lines and 2 anti-corrosion and
heat preservation production lines. It can produce various specifications of spiral steel
pipes with a diameter of 219-3500mm, a wall thickness of 4-25.4mm and a length of 3-70m. The
product implementation standards are: ASTM A53, API SL PSL1/PSL2, ASTM A252, EN10210,
EN10217, EN10219, etc., with an annual production capacity of 600,000 tons, SSAW products
are widely used in natural gas, petroleum, chemical, electric power, heat, water, Marine
dredging, port construction, infrastructure, urban pipeline network and other fields.
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