ASTM A106 - Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A106 Seamless steel pipe (also known as ASME SA106 pipes) is an American standard steel pipe.
This specification covers carbon steel pipe for high-temperature service. These pipes are suitable for welding, bending, flanging, and similar forming operations. Mechanical testing of the specimens shall include tensile, bending, flattening, hydrostatic and nondestructive electric tests. Specimens undergoing bending tests shall consist of sections cut from a pipe. For flattening tests, the specimens shall be smooth on the ends and burr-free, except when made on crop ends. All tests shall be performed in room temperature. If any test specimen shows flaws it can be discarded and substituted for another test specimen. Before testing, if a specimen has scribe scratches, a retest shall be allowed. A retest shall also be allowed if a specimen breaks in an inside or outside surface flaw.
For ASTM A106 seamless steel pipe could transport fluids or gasses at high temperature and pressure levels, with 3 grades A, B, C, most common used ASTM A106 Grade B is widely used in the projects of oil and gas refineries, power plants, petrochemical plants, boilers.
ASTM A106 Grade B Pipe (also known as ASME SA106 GR.B pipes) is used in power plants, boilers, petrochemical plants, oil and gas refineries, and ships where the piping must transport hot or cold liquids and gases under high pressures and temperatures. A106 GR. B Carbon Steel Seamless Pipes, A106 Gr B Sch 40 pipe, ASTM A106 Grade B Pipe Suppliers is available in various weights, sizes, and black and galvanized grades both seamless and electric welded. ASTM A106 Grade B Pipe sizes, less than 2" is it normally delivered as a cold drawn product. 2" and up are usually hot finished.
ASTM A106 Grade C Pipe (also known as ASME SA106 GR.C pipes) is a carbon-manganese steel pipe for high-temperature large-diameter boilers and superheaters. Its chemical composition is simple and similar to 20G carbon steel, but its carbon and manganese content is higher, so its yield strength is about 12% higher than that of 20G, and its plasticity and toughness are not bad. The steel has a simple production process and good cold and hot workability. Using it to replace 20G headers (economizer, water wall, low-temperature superheater and reheater header) can reduce the wall thickness by about 10%, which can save material costs, reduce welding workload, and improve headers The stress difference at start-up.
|
Standard |
Steel Grade |
Tensile strength (MPA) |
Yield strength (MPA) |
|
ASTM A106 |
A |
≥330 |
≥205 |
| B |
≥415 |
≥240 |
|
| C |
≥485 |
≥275 |
|
Standard |
Steel Grade |
C |
Si |
Mn |
P | S | Cr | Mo | Cu | Ni | V |
|
ASTM A106 |
A |
≤0.25 |
≥0.10 |
0.27~0.93 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 |
| B |
≤0.30 |
≥0.10 |
0.29～1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 |
|
| C |
≤0.35 |
≥0.10 |
0.29～1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 |
1. Below the specified maximum carbon content, each time the carbon content decreases by 0.01%, the A106 seamless steel pipe is allowed to increase the manganese content by 0.06% above the specified maximum manganese content, but the maximum shall not exceed 1.35%;
2. The sum of the five elements Cu, Ni, Cr, Mo and V shall not be greater than 1.00%.
ASTM A106 seamless carbon steel pipe is manufactured through standardized hot seamless processing for high-temperature and high-pressure industrial use. The procedure begins with strict inspection of carbon steel round billets to confirm chemical composition and mechanical performance meet ASTM A106 requirements.
Qualified billets are evenly heated in a rotary furnace, then pierced into hollow pipe shells by a piercing mill. The hollow shells go through continuous rolling, sizing and reducing to achieve precise outer diameter and wall thickness. After air cooling, pipes are straightened to remove deformation.
Subsequently, pipes are cut to fixed length with end facing and beveling. All products pass rigorous inspections including dimension check, hydrostatic test, mechanical test and non-destructive testing. Qualified pipes are marked, painted, packaged and stored, ensuring stable quality and reliable performance for power plant, petrochemical and boiler piping projects.
Raw Material Inspection → Round Billet Heating → Rotary Piercing → Pipe Shell Rolling → Sizing & Reducing → Air Cooling → Pipe Straightening → Fixed-Length Cutting → End Facing & Beveling → Hydrostatic & NDT Testing → Surface Treatment & Painting → Marking & Packaging → Finished Goods Storage & Shipment
ASTM A106 seamless carbon steel pipe features outstanding high-temperature resistance, high-pressure performance and stable mechanical properties, ideal for industrial fluid transmission under harsh working conditions.
1. Power Plants: Widely used for boiler tubes, steam pipelines, heat exchangers and condenser systems for long-term high-temperature operation.
2. Petrochemical & Refinery Industry: Applied in process piping, furnace pipelines and oil refining medium delivery lines.
3. Oil & Gas Industry: Suitable for gathering pipelines, wellhead piping and long-distance oil and gas fluid transportation.
4. Industrial & Marine Field: Extensively adopted in industrial boiler systems, central heating engineering and shipbuilding marine piping.
5. General Industrial Construction: Perfect for infrastructure projects, chemical processing, and high-temperature water & gas transmission pipelines.
Q: What is the difference between pipe design material A106 and SA106?
A: There is no difference between pipe design material A106 and SA106,
Because the 2013 edition of the ASME II material chapter has pointed out that SA106 is consistent with ASTM A106,In addition, SA106 is a grade of American ASME,And A106 is the grade of ASTM.
Q: What does the mark CD in the steel pipe SA106Gr.B standard mean?
A: CD means cold drawn,SA106 stipulates that pipes below DN40 can be hot-rolled or cold-drawn; pipes above DN50 are conventionally hot-rolled. When the manufacturer and the purchaser reach an agreement, cold-drawn manufacturing is allowed.
Q: What is the difference between ASME SA-106 and ASME SA-106M?
A: The difference between ASME SA-106 and ASME SA-106M is that if the size standard is imperial, use ASME SA-106, if the size standard is metric, use ASME SA-106M.
Tips: The A106 includes A106-A, A106-B and A106-C. A106 A is equivalent to the China's 10# material, and the A106 B is equivalent to the China's 20# material. It belongs to the ordinary carbon steel series and is one of the commonly used materials. ASTM A106 seamless steel pipe includes two processes of cold drawing and hot rolling. In addition to the different production processes, the two are different in accuracy, surface quality, minimum size, mechanical properties, and organizational structure. Widely used in petroleum, chemical, boiler, power station, shipbuilding, machinery manufacturing, automobile, aviation, aerospace, energy, geology, construction and military industries.
