What does a 90° extended welded elbow mean?

At the two ends of the elbow at the time of manufacture, short pipes are welded on, or it is produced with a short pipe already attached, as part of an integrated construction. A welded elbow refers to an elbow with longitudinal welds on its body; it’s best to check the technical description of the elbow or the accompanying drawings for details

A 90° elongated welded elbow is a welded elbow fitting with a bending radius greater than 1.0 times the diameter.

A 90° elongated welded elbow refers to an elbow with a larger radius; the normal radius for such elbows is 1.5 times that of regular elbows. However, due to high medium pressures, such as 160 kilograms, 3D elbows are typically used

An analysis needs to be conducted by taking into account the context, drawings, and other relevant information. My understanding differs slightly from that of the person above: What does a 90° extended welded elbow mean? Extended? On the 3rd floor, it was said that the bending radius should be more than 1.0 times the specified value. Standard elbows come in two types: those with a long radius and those with a short radius; the long radius corresponds to 1.5 times the bending radius, while the short radius is 1.0 times that value. As for the term “extended,” it may refer to adding a straight section to the elbow, or it could mean something else – the terminology might vary. Welded elbow? In my opinion, it should be a butt-welded type; after all, elbows come in various types such as butt-welded, socket-welded, and threaded, and not all elbows necessarily have welds.

This concept is a bit confusing, as there is no official name for it; therefore, there are many possible interpretations. In my opinion, the most accurate meaning is that it refers to an elbow with an extended straight section. Such products are commonly used in power plant standards, such as GD87 – their dimensions conform to the standards, but they have a straight section, and they belong to the category of elbows rather than bent pipes. Such a practice is hardly used these days; in most cases, if it is indeed used, many opt for straight pipes or convert them into curved pipes instead

It should be like this. This extension refers to the straight section; I understand it to be the same. If you compare a regular elbow with an extended one, when looking at just one of them, I sometimes can’t tell whether it’s the extended version