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Alland - Extruded Seamless Pipe
Extruded Seamless Pipe is a type of seamless steel pipe manufactured through a metal extrusion forming process. This process involves placing a heated solid steel billet into an extrusion cylinder, where high pressure forces the metal through a die to form seamless tubing with specific outer diameters and wall thicknesses.
ALLAND Steel Pipe Manufacturer. Our Extruded Seamless Pipe utilizes high-quality steel billets, formed in a single extrusion process. Subsequent dimensional inspection and weld seam testing further enhance the pipe’s overall performance. This pipe is ideal for producing thin-walled, small-diameter, special alloy, or stainless steel tubing, serving industries such as natural gas, chemical processing, and machinery manufacturing. ALLLAND delivers stable, high-quality seamless pipe solutions tailored to customer requirements.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience. The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines. With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
- Particularly suited for thick walls and complex geometries, the extrusion process offers inherent advantages in producing thick-walled tubes, small-diameter tubes, and irregularly shaped structural tubes—achievements difficult to realize through hot rolling or cold drawing.
- Exceptional material adaptability: High-alloy steels, stainless steels, and other difficult-to-form materials are ideally suited for shaping via extrusion.
- High pressure-bearing capacity and structural reliability. The seamless, weld-free construction makes it suitable for high-pressure, high-temperature, and highly corrosive environments.
- Supports customized production. For non-standard dimensions and small-batch projects, extruded seamless steel tubes offer greater economic viability.
- Mature quality control. Full traceability from billet to finished product, supporting third-party inspection.
The billet is heated to 1100-1250°C and pierced to form the base pipe.The base pipe blank is then transported to the extrusion cylinder, where it is formed into seamless pipe of the required dimensions in a single pass under high pressure. This process features concentrated deformation and uniform stress distribution, enabling production of special dimensions.
Extruded Seamless Pipe is typically preferred when projects require:
- Thick or extra-thick wall structures
- Small inner diameters with high wall thickness ratios
- Difficult-to-form materials like high-alloy steel or stainless steel
- Non-standard dimensions or small-batch customization
In these scenarios, hot rolling or cold drawing processes often face limitations, whereas the extrusion process offers greater stability and controllability.
- Capable of manufacturing large-diameter, thick-walled pipes
- High-alloy steel can be used as raw material
- Internal voids are compacted for excellent pressure resistance
- Customizable dimensions, including non-standard sizes
- Seamless steel pipe extrusion is not about “the higher the grade, the better,” but rather: whether it matches the operating conditions, whether it delivers tangible structural or safety advantages, and whether it reduces overall project risks.
- A professional supplier should help buyers determine “whether there are more suitable or cost-effective solutions,” rather than merely providing quotes.
- O.D.: 20 mm – 450 mm
- W.T.: 5 mm – 120 mm
- Length: 2 m – 6 m, Supports non-fixed and fixed-length production
- Dimensional Tolerances: Complies with ASTM / EN / GB standards, Excellent wall thickness uniformity
- Standards:
- ASTM: A106, A335, A213, A269
- EN: EN 10216, EN 10297
- DIN: DIN 17175, DIN 2391
- GB: GB/T 8162, GB/T 5310
- Steel Grades:
- Carbon Steel & Alloy Steel
- ASTM A106 Gr.B / Gr.C
- ASTM A335 P11 / P22 / P91
- 10CrMo9-10/ 13CrMo4-5
- Surface Treatment: As-extruded, pickled, machined surface, rust-preventive oil coating, or sandblasted
- End Conditions: Plain End (PE), Beveled End (BE), Machined End