90° Threaded Elbow

The dimensions of 90° threaded elbows involve many aspects, including nominal diameter, end outer diameter, center-to-end dimension, center-to-center dimension, etc. These dimensions are not only related to the basic specifications of the elbow, but also directly affect its installation and use in the piping system.

90° threaded elbow, also known as threaded elbow, is a pipe fitting used to change the direction of the pipeline in the pipeline system. It can be divided into 45° and 90° according to the angle according to the project needs, and also includes other abnormal angle elbows such as 60°. This kind of elbow is made of various materials, including cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. The characteristic of the threaded elbow is that it has a thread groove on the thread mouth, which enables it to effectively change the direction of fluid delivery or pressure transmission in the pipeline system, and also allows two pipeline components or equipment and pipeline components to be connected vertically on the axis.

‌The materials of 90° threaded elbows include cast iron, stainless steel, alloy steel, wrought iron, carbon steel, non-ferrous metals and plastics. ‌The choice of these materials depends on the specific application scenarios and engineering requirements. For example, the materials of stainless steel 90° elbows can be divided into 201 material, 304 material, 304L material, 316 material, 316L material, etc. The corrosion resistance of these materials varies, and users can choose the appropriate material according to the specific use environment. Stainless steel 90° elbows, especially 304 and 316L materials, are often used in environments that need to resist corrosion due to their good corrosion resistance. In addition, the manufacturing standards of threaded elbows generally include GB/T14383, ASME B16.11, BS 3799, etc. to ensure that the quality and performance of the elbows meet the relevant standards and requirements.‌

The specifications and dimensions of 90° threaded elbows involve many aspects, including nominal diameter, end outer diameter, center-to-end face dimension, center-to-center dimension, and back-to-end face dimension. The specific specifications and dimensions are as follows:

‌1. Nominal diameter DN and end outer diameter:

DN15 90° elbow, end outer diameter is 21.3mm.

DN25 90° elbow, end outer diameter is 32mm.

DN100 90° elbow, end outer diameter is 114.3mm.

DN150 90° elbow, end outer diameter is 168.3mm.

2. Center-to-end face dimension and center-to-center dimension:

For 90° elbows of different diameters, the center-to-end face dimension and center-to-center dimension are also different. The specific values depend on the specific series of the elbow (A series or B series), radius type (long radius or short radius) and specific diameter size.

3. ‌Back to end face size‌:

This size also depends on the specific specifications of the elbow, including diameter size, series type, etc.

The use of 90° threaded elbows mainly involves correct installation steps and maintenance precautions to ensure the reliability and sealing of the connection. The following are the basic steps for using 90° threaded elbows:

1. Preparation: First, confirm whether the specifications and sizes of the required 90° threaded elbows and related pipes meet the requirements. Check the integrity of the elbows and clean the surfaces of the pipes and elbows to ensure that there is no dirt, grease or other impurities.

2. Apply thread sealant: Apply an appropriate amount of thread sealant to the threaded part of the elbow. Thread sealant helps to provide better sealing and prevent water leakage.

3. Connect the pipe: Insert the threaded end of the pipe into the two same-diameter ports of the elbow and rotate clockwise until the connection is tight. Then insert the threaded end of another pipe of different size into the reducer of the elbow and rotate until the connection is tight.

4. Use a wrench: Use a suitable wrench or tool to properly rotate the elbow and pipe to ensure that the connection is tight. But be careful not to use excessive force to avoid damaging the elbow or pipe.

5. Inspection and testing: After completing the installation, check whether the elbows and pipe connections are firm, and verify the reliability and tightness of the connections through pressure testing or other appropriate methods.