Seamless Tube

Liwan Precision produces cold-rolled precision seamless steel tubes using high-quality seamless tube blanks and multi-pass cold rolling technology. With an annual capacity of approximately 60,000 tons, the process delivers superior dimensional accuracy, smooth surface finish, and enhanced mechanical performance with excellent strength and stability.

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Standards

  • GB/T3639 < cold-rolled and cold drawn precision seamless tubes >
  • ASTM-A513 < ERW carbon steel and alloy steel mechanical tubes >
  • ASTM-A519 < standard specification for seamless carbon and alloy steel machanical tubing >
  • EN10305-2 < welded cold drawn tubes >
  • ENi0305-4/6 < seamless cold drawn tubes for hysraulc and pneumatic power system swelded
    cold drawn tubes for hydraulic and pneumatic power system >
  • IS-G3445 < Carbon steel tubes for machine structural purpose >
Capacity
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Capacity

Liwan Precision operates an integrated manufacturing system with annual capacities of approximately 130 million machined components, 128,000 tons of cold-drawn precision steel tubes, 170,000 tons of welded precision steel tubes, and 60,000 tons of precision seamless steel tubes.

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Main Production Equipment
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Main Production Equipment

Liwan Precision is equipped with a comprehensive manufacturing system featuring advanced ERW tube mills, multi-line cold drawing machines, and cold rolling units, complemented by continuous heat treatment lines and high-precision machining equipment, enabling integrated production from raw materials to finished tubular components.

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Laboratory Capabilities
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Laboratory Capabilities

Liwan Precision operates a standardized laboratory equipped with advanced testing systems for mechanical properties, metallographic analysis, dimensional inspection, and surface quality evaluation, ensuring stable and consistent product quality from raw materials to finished products.

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Applications
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Applications

Liwan Precision provides high-precision and highly reliable precision tubing and component solutions for high-end manufacturing industries, including automotive, construction machinery, motorcycles, high-speed rail, and robotics.

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Sales Network
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Sales Network

Liwan Precision has established a comprehensive sales and service network across China while continuously expanding its global presence to provide reliable products and responsive support for customers worldwide.

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More Products

ERW tube

CDW tube

Processed parts