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Technical requirements for high pressure hot drawing tee fitting

Apr 20, 2020

When designing and manufacturing high-pressure hot-drawn tee pipe fittings, strict standards shall be required, and the products shall meet the following technical requirements:

1. After heat treatment of high-pressure hot drawing tee pipe fitting, the metallographic structure is the same as the raw material.The surface hardness of alloy steel was HB125~197.The surface hardness of galore steel is HB217.

2. No cracks are allowed on the surface of high-pressure hot-drawn tee pipe fitting. The depth of defects such as smooth surface, scars and folds should not be greater than 1.6mm.

3. The geometric size and deviation of high-pressure hot drawing tee pipe fitting, such as the inner and outer diameter of the port, the internal and external groove, the deviation of the Angle of the end face and the height of the branch pipe shall meet the requirements of the drawing. The butt wall thickness of the product port shall not be less than the minimum allowable value of the nominal thick wall of the connection pipe.The ellipticity outside the port shall not be greater than 6% of the nominal outside diameter;When the port wall thickness is greater than 1.15 times of the pipe wall thickness, the internal groove shall be reprocessed according to the standard.

4. The flow area of high-pressure hot drawing tee pipe fitting shall not be less than 90% of the flow area of the main pipe.

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