Bends with a diameter of DN600 or above are called large diameter elbows.
The most commonly used ones in the market are butt welded elbows, straight seams, and seamless pipes. In addition to raw material and equipment technology, they are also relatively expensive in terms of large diameters. Large diameter elbows can be divided into 45 degree large diameter elbows according to their angles, including 90 degree large diameter elbows, 180 degree large diameter elbows, and other elbows with different angles. According to the material, it can be divided into carbon steel large-diameter elbows, stainless steel large-diameter elbows, and alloy steel large-diameter elbows. According to the curvature radius, it can be divided into long radius large-diameter elbows and short radius large-diameter elbows. The main standards for large-diameter elbows include national standards, electrical standards, Sinopec standards, marine standards, Japanese standards, American standards, etc. The large-diameter elbow has the advantages of smooth inner wall, low heat medium flow resistance, acid and alkali resistance, long service life, and convenient installation.
