Introduction to SA210C seamless pipe

SA210C seamless pipe, conforming to the ASME SA-210M standard, is a medium-carbon steel pipe designed specifically for boilers and superheaters. It holds a critical role in various industries, particularly in the manufacturing of boiler tubes. Below is a detailed overview of the SA210C seamless pipe:

1. Basic Information

Standard: ASME SA-210/SA-210M

Material: High-strength carbon manganese steel

Key Features: Exceptional strength, high temperature resistance, corrosion resistance, and a straightforward manufacturing process.

2. Chemical Composition

The chemical composition of SA210C seamless pipe primarily consists of carbon, manganese, silicon, phosphorus, sulfur, and other elements. The specific composition is as follows:

Carbon (C): ≤0.35%

Manganese (Mn): 0.29% – 1.06%

Silicon (Si): ≥0.10%

Phosphorus (P): ≤0.035%

Sulfur (S): ≤0.035%

These elements combine to provide SA210C seamless pipe with superior mechanical properties and corrosion resistance. Compared to SA210A1, SA210C features a higher carbon content upper limit, a broader range of manganese content, and slightly higher permissible levels of phosphorus and sulfur. This careful composition control enables it to adapt better to complex working conditions than standard carbon steel pipes.

3. Mechanical Properties

SA210C seamless pipes exhibit excellent mechanical properties, which are crucial for high-temperature and high-pressure applications. Key mechanical properties include:

Tensile Strength: ≥485 MPa

Yield Strength: ≥275 MPa

Elongation: ≥30%

Hardness: ≤89 HRB

These attributes ensure the safety and reliability of SA210C seamless pipes in demanding environments. Whether used as hydraulic tubes under high pressure or heat exchanger tubes requiring excellent toughness, SA210C seamlessly meets these requirements.

4. Specifications

SA210C seamless pipes are available in a range of specifications, suited to various industry needs. The typical outer diameter ranges from 57mm to 762mm, with wall thickness ranging from 3.0mm to 130mm. Special specifications, such as internally threaded pipes, are also available. For instance, an internally threaded SA210C pipe might have a nominal diameter of DN63.5mm (approximately 2.5 inches) and a wall thickness of 7.1mm.

5. Production Process

The production of SA210C seamless pipes requires careful attention to welding performance. Generally, these pipes do not require preheating before welding or heat treatment after welding. However, caution should be exercised to avoid the brittle temperature range of approximately 250°C during pipe bending. Hot rolling is typically employed to form the pipes, offering advantages such as high production efficiency, cost-effectiveness, and enhanced strength. This process also improves the physical properties of the steel, making it more suitable for high-temperature and high-pressure conditions.

6. Applications

SA210C seamless pipes find use across various industries, including:

Construction Industry: Used in the construction of high-rise buildings, large-span bridges, and other major structures, especially in earthquake-prone regions.

Petrochemical Industry: Due to its high corrosion and pressure resistance, it is widely employed in pipelines within the petroleum and chemical sectors.

Power Industry: Commonly used in the manufacture of high-voltage electric poles, wire brackets, and various components in large power station boilers, such as water-cooled walls, economizers, and superheaters. It is an ideal material for casing pipes and pup joints.

Shipbuilding Industry: Meets the stringent requirements of shipbuilding, especially for the fabrication of ship hulls and cabins.

Environmental Protection Industry: Used in sewage treatment and waste disposal systems, where it withstands exposure to corrosive substances.

7. Inspection and Certification

During production, SA210C seamless pipes undergo stringent quality checks, including chemical composition analysis, mechanical property testing, and metallographic examination. Only pipes that pass these inspections are certified as high-quality products and are eligible for market distribution. Additionally, these pipes comply with the ASME SA-210M standard, ensuring their quality and reliability for industrial applications.