ASTM A234 WP11 4 Inch 90 Degree Long Radius Elbow ASME B16.9

ong radius elbow refers to that the radius of curvature of elbow is 1.5 times of pipe diameter; if it is greater than 1.5 times, it is the category of elbow. Short radius elbow refers to that the radius of curvature of the elbow is equal to the diameter of the pipe, which is often said to be 1 times. D is the diameter of the elbow.

The long radius is the most commonly used one. Generally, it is also a long radius by default. For places with high pressure or high flow velocity, the elbow with larger radius should be used if the resistance requirements of solid conveying pipeline are strict.

Short radius is usually used in low-pressure fluid or elbow is used in limited installation. Long radius elbow is preferred if there are no conditions or are not specified in the contract.

Wooden cases and wooden brackets shall be used for packaging. The materials of long radius elbow are stainless steel, carbon steel, alloy steel, etc.

Application scope: sewage treatment, chemical, thermal, pharmaceutical, aerospace, electric power, papermaking and other industries.

Technical requirement

The radius of curvature is required to be controlled. For example, if the radius length is 1.5D, then the radius of curvature must be within the required tolerance range. Since most of these pipe fittings are used for welding, in order to improve the welding quality, the ends are chamfered with a certain angle and a certain edge. This requirement is also quite strict. The thickness of the side, the angle and the deviation range are specified. There are many more items in the geometric dimension than the pipe fittings. The surface quality and mechanical properties of elbows are basically the same as those of pipes. For the convenience of welding, the material of the steel used for connecting the pipe should be the same.