Introduction
Hot-rolled seamless steel pipes are steel tubes made from carbon steel or alloy steel through high-temperature rolling and piercing. This process refines the grain structure and enhances mechanical properties, making them suitable for applications in construction, mechanical processing, petrochemicals, and fluid transportation.
| Tolerance | ±1% | |||
| Surface Treatment | Hot Rolled | |||
| Grade | 20# Q345B Q355B 27simn 35crmo 42crmo 15crmo, etc. | |||
| Standard | ASTM/JIS/AISI/DIN/BS/En/GB | |||
| Outer Diameter | 6mm - 1220mm, can be customized | |||
| Certificate | ISO9001, API , Bsi, ce, rohs, JIS, GS, sirm, SABS | |||
| Thickness | 1mm - 100mm, can be customized | |||
| Length |
6m, 12m, can be customized |
|||
| Application | Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, OIL PIPE, Chemical Fertilizer Pipe, Structure Pipe | |||
Features
- Superior Performance
Hot-rolled seamless pipes are precision hot-formed for superior toughness, tensile strength, and pressure resistance, delivering stable performance in harsh conditions like extreme heat, high internal pressure, and dynamic loads.
- Uniform Wall Thickness & Smooth Structure
The seamless production method eliminates weld seams, ensuring consistent wall thickness and improved structural integrity. This not only minimizes the risk of cracking or leakage but also extends the overall service life of the pipe, reducing maintenance costs for end users.
- Excellent Workability & Versatility
Hot-rolled pipes feature enhanced ductility and processing flexibility. They can be easily cut, machined, bent, or welded, which makes them adaptable to a wide range of fabrication requirements across different industries.
Standards & Certifications
| Product Name | Steel Pipe Spot Material | Execution Standard | Specification | Application |
| General Structural Pipe | 10#,20#,45#,27SiMn ASTM A53A,B 16Mn |
GB/T8162-2008 GB/T17396-1998 ASTM A53 |
∮8-1240*1-200 | general structures, engineering supports, mechanical processing, etc. |
| seamless (SMLS) steel pipe | 20#,Q195,Q215A,B Q235A,B,Q345A,B,C,D,E |
GB/T13793-1992 GB3091-2001 |
∮32-630*1-30 | structural supports and low-pressure fluid transportation, etc. |
| Spiral steel pipe | Q235A-B,Q345A-E | SY/T5037-2000 | 219-2820*4-20 | Applicable to steel pipes used for low-pressure fluid transportation |
Structural seamless pipes (GB/T8162-2008) are used for general structures and mechanical structures.
Seamless pipes for fluid transportation (GB/T 8163-2018) are general seamless pipes used for transporting fluids such as water, oil, and gas.
Customization Options
- Standards and Material Grades
Products can be manufactured according to various international standards and material grades based on customer requirements.
- Customized markings & Labels
Markings & labels for easy traceability and inventory management.
- Flexible Delivery Options
Container shipping, bulk transportation, and port-to-port logistics support.
Every package complies with international export standards, ensuring the goods arrive safely and in perfect condition.
- Surface Treatment Options
Protective coatings such as anti-rust oil, painting, or specialized coatings can be applied when required.
FAQ
Q: What standards can these pipes meet?
A: Typical standards include ASTM, API, DIN, JIS, and GB, depending on the product specification.
Q: What testing methods are used?
A: Mechanical tests, chemical analysis, and non-destructive testing methods are commonly used.
Q: What is the manufacturing process?
A: Round billet → heating → piercing → three-roll cross-rolling, continuous rolling, or extrusion → removing the tube → sizing (or reducing diameter) → cooling → rough pipe → straightening → hydrostatic testing (or flaw detection) → marking → storage.
Q: What is the advantage of hot rolling compared with cold rolling?
A: Hot rolling allows the production of thicker pipes and larger diameters.
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