ASTM A106 Seamless Steel Pipes represent a robust solution for high-temperature and high-pressure applications. With its standardized grades (A, B, C), strict chemical and mechanical controls, and versatile manufacturing processes, it remains the preferred choice for engineers and procurement specialists in critical industrial sectors. Proper selection of grade and wall thickness, along with adherence to welding and handling guidelines, ensures long-term reliability and safety in operation.
Products Description
| Product | ASTM A106 Seamless Steel Pipe |
| Manufacturing | Hot rolled, Cold drawn |
| OD | 1/2"~36"(21.3~914mm) |
| Thickness | 0.055"~2"(1.65~50mm) |
| Ends | bevel or plain or groove |
| Coating | Bare, black painting, FBE, Epoxy , 3LPE,3LPP... |
chemical composition
| Element (%) | Grade A | Grade B | Grade C |
|---|---|---|---|
| Carbon (max) | 0.25 | 0.30 | 0.35 |
| Manganese | 0.27 – 0.93 | 0.29 – 1.06 | 0.29 – 1.06 |
| Phosphorus (max) | 0.035 | 0.035 | 0.035 |
| Sulfur (max) | 0.035 | 0.035 | 0.035 |
| Silicon (min) | 0.10 | 0.10 | 0.10 |
| Chromium (max) | 0.40 | 0.40 | 0.40 |
| Copper (max) | 0.40 | 0.40 | 0.40 |
| Molybdenum (max) | 0.15 | 0.15 | 0.15 |
| Nickel (max) | 0.40 | 0.40 | 0.40 |
| Vanadium (max) | 0.08 | 0.08 | 0.08 |
Note: For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum is permitted, up to a maximum of 1.35% for ASME A106.
Mechanical Properties
| Property | Grade A | Grade B (Most Common) | Grade C |
|---|---|---|---|
| Tensile Strength (min) | 48,000 psi (330 MPa) | 60,000 psi (415 MPa) | 70,000 psi (485 MPa) |
| Yield Strength (min) | 30,000 psi (205 MPa) | 35,000 psi (240 MPa) | 40,000 psi (275 MPa) |
| Elongation (min %) | 35% | 30% | 30% |
| Primary Application | Low-pressure steam/water | General high-temp/pressure | Ultra-high pressure/temp |
Note: Grade B is the most widely used grade, covering over 90% of high-temperature and high-pressure pipeline needs in refineries and power plants.
Hot Rolled manufacturing
ASTM A106 Seamless Steel Pipe is produced through a rigorous manufacturing sequence that ensures structural integrity and dimensional accuracy. The process typically involves:
Pipe Blank Preparation: Selection of killed steel (deoxidized) melted via open-hearth, basic oxygen, or electric furnace methods.
Heating & Perforation: The billet is heated and pierced to form a hollow shell.
Hot Rolling: The shell is rolled to achieve the desired outer diameter and wall thickness.
Sizing & Reducing: Final dimensions are achieved through sizing mills.
Heat Treatment: While hot-finished pipes do not strictly require heat treatment, they may be stress-relieved at temperatures ≥650°C if specified. Cold-drawn pipes must undergo heat treatment after the final draw pass.
Advantages of Seamless Pipes
High Strength: Suitable for high-pressure and high-temperature environments.
No Weld Seam: Eliminates the risk of weld failure, ensuring uniformity in strength around the circumference.
Formability: Capable of being bent, coiled, flanged, and welded without cracking, provided appropriate procedures are followed
Applications
ASTM A106 seamless pipes are extensively used in industries requiring reliable transport of fluids and gases under severe conditions:
Power Plants: Boiler tubes, superheaters, and steam lines.
Petrochemical Industry: Refinery piping, cracking units, and process lines.
Oil and Gas: High-pressure transmission lines and offshore platforms.
Shipbuilding: High-temperature fluid systems.
Industrial Boilers: Water walls, economizers, and reheaters
quality control
* Hydrostatic Pressure Test
* Non-Destructive Test (Eddy Current, Ultrasonic)
* Chemical composition test
* Mechanical Property Test
* Dimension & Visual Inspection
* Third party inspection before shipment accepted also
shipment
Contact
Kevin
Tianjin shenzhoutong steel pipe co.,ltd
kevin@tjshenzhoutong.com
Mob/whatsapp/wechat +86 15267768016
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