ASTM A106 Grade B Seamless Steel Pipe
ASTM A106 Grade B is a seamless carbon steel pipe designed for high-temperature service in power plants, refineries, and petrochemical facilities. Available in NPS 1/2 inch to NPS 26 inch with multiple wall thickness schedules. Mill test certificate provided.
| Material | Carbon Steel (High Temperature Service) |
|---|---|
| Grade / Standard | ASTM A106 Grade B |
| Outer Diameter (OD) | 21.3mm - 660mm (NPS 1/2 inch - NPS 26 inch) |
| Wall Thickness (WT) | 2.77mm - 60mm (SCH 40 / SCH 80 / SCH 160 / XXS) |
| Length | 5.8m - 12m (Random / Single Random / Double Random / Cut to Length) |
| Delivery Condition | Hot Rolled,Cold Rolled,Normalized / cold_rolled / normalized |
| Surface Treatment | bare / painting / galvanized / coated |
| MOQ | 1 Ton |
| Delivery Time | 7-15 Days (Stock) / 30-45 Days (Custom) |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of ASTM A106 Grade B Seamless Steel Pipe
ASTM A106 Grade B is the most widely used seamless carbon steel pipe specification for high-temperature service applications worldwide. It is manufactured under ASTM A106/A106M standard and is specifically designed to handle elevated temperatures and pressures encountered in power generation, refineries, petrochemical plants, and process piping systems. Unlike A53 pipes which are intended for general structural use, A106 is engineered for fluid and gas conveyance under demanding thermal conditions.
The Grade B classification represents the medium strength variant within the ASTM A106 family, offering an optimal balance between mechanical strength, weldability, and cost-effectiveness. With a minimum yield strength of 240 MPa and tensile strength of 415 MPa, it is the standard choice for high-pressure piping in temperatures up to 800°F (427°C).
Key Features and Manufacturing Advantages
ASTM A106 Grade B seamless steel pipe is produced through hot-rolled or cold-drawn manufacturing processes, ensuring uniform wall thickness and consistent mechanical properties throughout the pipe length. The seamless construction eliminates welded seams, providing superior pressure resistance, leak-free performance, and consistent metallurgical structure compared to welded pipe alternatives.
The pipe undergoes mandatory hydrostatic testing, non-destructive examination (NDE), and dimensional inspection per ASTM standards. Each length is supplied with chemical composition analysis, mechanical property verification, and heat treatment documentation. Surface conditions include black (mill finish), painted, varnished, or oiled depending on application requirements. Available in NPS 1/2 inch through NPS 26 inch with various wall thickness schedules including SCH 40, SCH 80, SCH 160, and XXS.
Main Applications of A106 Grade B Pipe
ASTM A106 Grade B seamless pipe is the standard piping material for power generation plants including coal-fired, gas-fired, and combined cycle power stations, where it serves as steam lines, condensate piping, and feedwater systems. In the petroleum refining industry, it is extensively used for process piping carrying crude oil, refined products, hydrocarbons, and high-temperature steam.
Petrochemical plants use A106 Grade B pipe for chemical process lines, reactor connections, and heat exchanger interconnecting piping. The oil and gas sector employs this pipe for pipeline manifolds, separator stations, and processing facility piping. Other applications include shipbuilding (engine room piping), boiler external piping (BEP), HVAC heating systems, fire protection systems, and high-pressure hydraulic lines in industrial machinery.
Why Choose Us for ASTM A106 Grade B Seamless Pipe
Shandong Tanglu Metal Material Co., Ltd. supplies premium ASTM A106 Grade B seamless steel pipe sourced from leading Chinese pipe mills with PED, API, and ASME certifications. Every pipe is produced under strict quality control with mandatory hydrostatic testing, ultrasonic examination, and eddy current testing to ensure full compliance with ASTM A106/A106M latest revision.
We maintain large stock inventory of common sizes for immediate shipment within 7-15 days, while custom diameters, special wall thicknesses, and project-specific length requirements are produced within 30-45 days. With monthly supply capacity of 5,000 tons of seamless pipe and established relationships with international shipping lines, we deliver to power plants, refineries, and EPC contractors in over 50 countries with full export documentation including original mill test certificate EN 10204 3.1/3.2.
📐 Dimension & Size Table
| Thickness (mm) | Width (mm) | Length (mm) | Weight (kg/m²) |
|---|---|---|---|
| 1/2" (21.3mm) | 2.77 | 3.73 | 4.78 |
| 3/4" (26.7mm) | 2.87 | 3.91 | 5.56 |
| 1" (33.4mm) | 3.38 | 4.55 | 6.35 |
| 1-1/2" (48.3mm) | 3.68 | 5.08 | 7.14 |
| 2" (60.3mm) | 3.91 | 5.54 | 8.74 |
| 3" (88.9mm) | 5.49 | 7.62 | 11.13 |
| 4" (114.3mm) | 6.02 | 8.56 | 13.49 |
| 6" (168.3mm) | 7.11 | 10.97 | 18.26 |
| 8" (219.1mm) | 8.18 | 12.70 | 23.01 |
| 10" (273.0mm) | 9.27 | 15.09 | 28.58 |
| 12" (323.8mm) | 10.31 | 17.48 | 33.32 |
| 14" (355.6mm) | 11.13 | 19.05 | 35.71 |
| 16" (406.4mm) | 12.70 | 21.44 | 40.49 |
| 18" (457.0mm) | 14.27 | 23.83 | 45.24 |
| 20" (508.0mm) | 15.09 | 26.19 | 50.01 |
| 24" (610.0mm) | 17.48 | 30.96 | 59.54 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.30 | ≤0.30 | Per ASTM A106/A106M Grade B |
| Mn | 0.29 | 1.06 | 0.29-1.06 | |
| P | - | 0.035 | ≤0.035 | |
| S | - | 0.035 | ≤0.035 | |
| Si | 0.10 | - | ≥0.10 | |
| Cr | - | 0.40 | ≤0.40 | Residual element |
| Cu | - | 0.40 | ≤0.40 | Residual element |
| Mo | - | 0.15 | ≤0.15 | Residual element |
| Ni | - | 0.40 | ≤0.40 | Residual element |
| V | - | 0.08 | ≤0.08 | Residual element |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength | ≥415 | MPa | 60,000 psi minimum |
| Yield Strength | ≥240 | MPa | 35,000 psi minimum |
| Elongation (Longitudinal) | ≥30 | % | Strip specimen, gauge length 50mm |
| Elongation (Transverse) | ≥16.5 | % | Strip specimen for OD ≥8 inch |
| Hardness | ≤197 | HBW | Brinell hardness, optional test |
| Bending Test | 180° | deg | Per ASTM A106 for OD ≤2 inch |
| Hydrostatic Test | Pass | - | Mandatory per ASTM A106 |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Standard seaworthy export packing. Pipes bundled in hexagonal bundles with steel strapping (3-5 straps per bundle), plastic caps on both ends to prevent contamination, with weather-resistant tags showing heat number, grade, size, and length. Custom marking and color coding available for project requirements. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit),D/P (Documents against Payment),Western Union,PayPal |
| Price Term | FOB,CFR,CIF,EXW |
| Supply Capacity | 5,000 Tons/Month (Seamless Pipe) |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our ASTM A106 Grade B Seamless Steel Pipe?
Mill Certified High-Pressure Grade
ASTM A106 Grade B pipe supplied with original mill test certificate EN 10204 3.1/3.2, including chemical analysis, mechanical properties, hydrostatic test results, and full traceability for high-pressure applications.
Complete Size Range Available
Outer diameter from NPS 1/2 inch to NPS 26 inch, wall thickness covering SCH 40, SCH 80, SCH 160, and XXS schedules. Custom dimensions and special wall thickness available upon request.
Multi-Standard Certifications
Compliant with ASTM A106, ASME SA106, PED 2014/68/EU, ABS, DNV GL, Lloyd's Register, BV, and SGS certifications. Suitable for international power plant, refinery, and offshore project requirements.
Fast Stock Delivery
Common sizes available from stock with 7-15 days dispatch. Custom production cycles 30-45 days. Container loading optimized for both 20FT and 40FT containers with maximum payload efficiency.
Complete Technical Support
Free technical consultation on grade selection, wall thickness calculation per ASME B31.1/B31.3, end preparation options (plain end, beveled end, threaded), and shipping configuration optimization for your project.
🏭 Applications of ASTM A106 Grade B Seamless Steel Pipe
ASTM A106 Grade B seamless steel pipe is the industry standard for high-temperature service piping in power generation including coal-fired, gas-fired, and combined cycle power plants. It is extensively used for steam lines, condensate piping, feedwater systems, and boiler external piping (BEP). In the petroleum refining industry, A106 Grade B handles process streams of crude oil, refined hydrocarbons, and high-temperature steam in atmospheric distillation units, vacuum towers, and reactor systems. Petrochemical plants use this pipe for reactor connections, heat exchanger piping, and chemical process lines. Other major applications include offshore oil platforms, shipbuilding engine room piping, fire protection systems, HVAC heating networks, and high-pressure hydraulic systems.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ ABS
- ✅ DNV GL
- ✅ Lloyd's Register (LR)
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
- ✅ NK
- ✅ RINA
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 EN 10204 3.2
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
- 📋 Certificate of Origin
❓ Frequently Asked Questions
What is ASTM A106 Grade B seamless steel pipe?
ASTM A106 Grade B is a seamless carbon steel pipe specifically designed for high-temperature service in power, refinery, and petrochemical applications under ASTM A106/A106M standard. It features a minimum tensile strength of 415 MPa and yield strength of 240 MPa, suitable for temperatures up to 800°F (427°C). Unlike welded pipes, the seamless manufacturing process eliminates seam welds, providing superior pressure resistance and reliability.
What is the difference between ASTM A106 Grade B and ASTM A53 Grade B?
ASTM A106 Grade B is designed for high-temperature service and only available as seamless pipe, while ASTM A53 Grade B is intended for general structural and mechanical use, available as both seamless and welded (ERW). A106 has stricter chemical composition requirements (especially silicon ≥0.10%), mandatory mill test certificate, and is suitable for higher pressure and temperature applications. A53 is more economical and commonly used for fire protection, fence posts, and low-pressure fluid transport.
What sizes and wall thicknesses are available for A106 Grade B?
ASTM A106 Grade B is available in NPS 1/2 inch (21.3mm OD) through NPS 26 inch (660mm OD). Standard wall thickness schedules include SCH 40 (standard weight), SCH 80 (extra strong), SCH 160 (heavy wall), and XXS (double extra strong). Custom wall thickness, intermediate sizes, and special long lengths up to 24 meters are available for project-specific requirements.
What is the equivalent grade of ASTM A106 Grade B?
ASTM A106 Grade B has equivalent grades in multiple standards: ASME SA106 Grade B (US ASME boiler code), EN 10216-2 P235GH or P265GH (European pressure pipe standard), DIN 17175 St45.8 (German standard), JIS G3454 STPG370 (Japanese standard), and GB 20# or GB 8163 (Chinese standard). While these grades share similar mechanical properties, exact substitution should be verified against project codes and engineering specifications.
Can you provide hydrostatic test and mill test certificate?
Yes. Hydrostatic testing is mandatory for ASTM A106 Grade B per the standard requirement. Each pipe is tested at the mill before shipment with full documentation provided. We supply original mill test certificate (MTC) conforming to EN 10204 3.1 standard with every order, including chemical analysis, mechanical properties, hydrostatic test pressure, NDE results, and heat number traceability. EN 10204 3.2 with third-party inspection by SGS, BV, ABS, DNV, or LR is available for critical projects.
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