LR and SR Steel Butt Welding Elbow 90 Degree For Pipeline Direction

Product Specification

• Steel Butt Weld Fittings - 90-Degree Elbow

The 90-degree elbow is the most commonly used type of elbow in pipeline installation, serving to change the direction of piping systems. 90-degree elbows are categorized by their bending radius into long radius (LR) elbows and short radius (SR) elbows. Other common types of elbows used in fluid pipeline construction include 45-degree and 180-degree elbows. Our company can also customize other non-standard elbows according to the specific needs of the project.

The 90° elbow is the most commonly used type of elbow in pipeline installation, functioning to change the direction of the pipeline system. Butt weld elbows, made from two welded steel plates, are generally used for large diameter elbows through butt welding techniques. Thus, for industrial purposes, elbows with diameters of 600 mm and above are usually fabricated using butt welding. The butt weld 90° elbows can be categorized into long radius (LR) elbows and short radius (SR) elbows. Other common types of elbows used in fluid pipeline construction include 45° elbows and 180° elbows. Our company can also customize other non-standard elbows based on project requirements.

The American standard ANSI/ASME B16.9 elbow refers to elbows manufactured according to the standards of the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME). The ASME standards, incorporating many ANSI standards, cover a broad range of industrial fields including materials, processing, techniques, testing, etc.

• ANSI/ASME B16.9 90° Elbow Production Requirements

The connection of elbow components is predominantly achieved through welding processes. To ensure high quality, the ends of the elbows are beveled with a specific slope and edge size, which are critical and strictly controlled. The surface manufacturing of the elbows does not differ significantly from that of pipelines.

The components contained within the elbows require surface re-treatment, where the oxidized inner and outer layers are uniformly coated with anti-rust paint via spraying techniques. This is essential for facilitating transportation, easing international exports, and reducing wear and tear on the products, making it a crucial step in the production process.

In pipeline systems, butt weld fittings are pressure pipeline components used in the petrochemical, electric power, and other industries to change pipe direction or diameter, branch pipes, and achieve special connections. These fittings, which connect to pipes via welding, are especially suitable for long pipelines that do not require frequent dismantling. Due to changes in flow direction and cross-sectional area at the installation site, these components experience complex internal and external stress conditions, and the quality of the fittings directly affects the safe and stable operation of the entire pipeline system. There are various product types available, such as 90° elbows, 45° elbows, tees, crosses, caps, concentric and eccentric reducers, and stub ends. All our products comply with ASTM A403 and ASTM A234 standards. Butt weld fittings are primarily used in sectors like petrochemicals, healthcare, power, aerospace, military, fire protection, metallurgy, shipbuilding, natural gas, nuclear power, and environmental protection, which require high-pressure pipelines, precision-sized equipment, and other high-pressure applications.

• Buttweld 90° Elbow Specification

• Buttweld 90° Elbow Dimension

BW 90°LR/SR EIbow

Notes:

u Besides ASME, European standard EN, German standard DIN, Japanese standard (JIS), etc.are also applied.

u The elbow with NPS over 80 shall be customized according to customer specific needs.