Seamless boiler steel pipes material specification

Seamless boiler steel pipes are essential components in power plants, industrial boilers, and other high-temperature and high-pressure applications. They are primarily classified into medium-pressure boiler tubes and high-pressure boiler tubes, both of which are manufactured using seamless technology rather than welded steel pipes. This ensures superior strength, reliability, and resistance to high-temperature and high-pressure conditions.

Union Steel Industry Co., Ltd is professional boiler steel pipes manufacturer, for more details, please contact:sales@union-steels.com

Materials and Standards for Seamless Boiler Steel Pipes

The materials used in seamless boiler steel pipes are broadly categorized into carbon steel, alloy steel, and stainless steel, each conforming to specific industry standards:

- Carbon Steel:

Commonly used for moderate temperature and pressure applications.

Standards: ASTM/ASME A/SA 106, ASTM A179, ASTM A192, ASTM/ASME A/SA 210, ASTM A333 (Grades 1, 6, 7 to 9).

- Alloy Steel:

Designed for high-temperature and high-pressure environments, offering enhanced strength and oxidation resistance.

Standards: ASTM/ASME A/SA 213 (T1, T2, T5, T9, T11, T12, T22, T91, T92), ASTM A335 (P1, P2, P5, P9, P11, P12, P22, P91, P92).

- Stainless Steel:

Suitable for extreme conditions requiring corrosion resistance, such as in superheated steam systems.

Standards: ASTM A268, ASTM A213 (TP304/L, TP316/L, 310S, 309S, 317, 317L, 321, 321H), as well as duplex stainless steel grades.

Sizes of Seamless Boiler Steel Pipes

Seamless boiler steel pipes are manufactured in a range of sizes to meet different application needs:

Outer Diameter: Ranges from 6 mm to 1240 mm.

Wall Thickness: From 1 mm to 50 mm.

Common Sizes: Most boiler steel pipes are relatively small in diameter, typically below 1 1/2" (with standard sizes including 1/4", 1/2", 3/4", 1", and 1 1/2"). Larger sizes extend to 2", 2 1/2", 3", and up to 4", depending on application requirements.

Types of Seamless Boiler Steel Pipes

Straight boiler steel pipes – commonly used for various boiler and heat exchanger applications.

U-shaped boiler steel pipes – specifically designed for tube bundle exchangers, ensuring efficient heat transfer and space-saving installation.

Seamless boiler steel pipes comply with ASTM standards such as ASTM A106, ASTM A179, and ASTM A192, ensuring high-quality performance in demanding industrial environments.