ASTM A106 Gr.B Seamless Carbon Steel Pipe – General Fluid Grade
Product Overview
ASTM A106 Grade B seamless carbon steel pipe is the industry-standard material for high-temperature fluid and pressure piping applications. Manufactured by hot piercing and rolling processes with no weld seam, it delivers uniform mechanical properties, reliable pressure resistance and consistent quality across the full pipe length. This general-purpose grade is the most widely specified seamless carbon steel pipe, suitable for a very broad range of industrial, utility and construction applications.
Why Choose CNB Seamless Carbon Steel Pipe?
We source seamless steel pipes from leading Chinese mills including Baosteel, TPCO and Hengyang Steel, ensuring compliance with international standards and consistent material quality. Every pipe undergoes strict incoming inspection over chemical composition, dimensional accuracy and surface defects, with full traceability from melt to finished product. With large ready stock of standard sizes and custom processing capability, we can meet both bulk project orders and specialized piping requirements efficiently.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Seamless Carbon Steel Pipe (A106 Gr.B) |
| Steel Grade | ASTM A106 Grade B / 20# equivalent |
| Manufacturing Process | Hot rolled seamless |
| Outer Diameter Range | 1/2" – 24" (21.3mm – 610mm) |
| Wall Thickness Range | SCH10 – SCH160, STD, XS, XXS |
| Standard Lengths | 6m random / 12m double random, custom cut |
| Surface Condition | Black varnished, bare, oiled option |
| End Preparation | Plain, beveled, threaded, grooved |
| Applicable Standards | ASTM A106, ASME SA106, GB/T 8163 |
| Minimum Yield Strength | ≥240MPa |
| Minimum Tensile Strength | ≥415MPa |
Core Advantages
- Uniform seamless structure: No weld seam provides consistent strength and pressure resistance around the full circumference.
- Wide size range: Available from small-bore tubing to large-diameter heavy-wall pipe.
- Proven reliability: Industry-standard grade verified in thousands of industrial projects worldwide.
- Excellent weldability & machinability: Compatible with all common piping fabrication and installation methods.
- Full test documentation: Complete MTC with hydrostatic and NDT test results for every batch.
Applications
This A106 Gr.B seamless pipe is widely used for steam pipelines, water supply systems, petrochemical process piping, power plant utilities, heating networks, gas transmission lines and general industrial pressure piping.
Get a Quotation
We supply seamless carbon steel pipes in a full range of grades, sizes and wall thicknesses with custom end preparations and surface treatments. Third-party inspection by SGS/BV is available upon request. Contact our piping team for a detailed quotation and technical support for your project.
