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Process performance test of seamless steel tube for high pressure boiler

Today's article introduces you to several experiments on the process performance of seamless steel tubes for high-pressure boilers, and the purpose of each experiment.

Flattening test

Place the sample between two equal plates and use a press or other methods to evenly press it to the flattening distance specified in the relevant technical conditions. The test results are expressed in the flattening distance of the outer wall of the pipe or the flattening distance of the inner wall (mm)

Flaring test

Press the core with a certain taper (such as 1:10, 1:15, etc.) into one end of the metal tube sample to make it evenly expand to the expansion rate (%) specified by the relevant technical conditions, and then check the expansion of the sample Whether there are cracks and other defects at the mouth to determine whether the metal pipe flaring process performance is qualified

Crimping test

Flip the tube wall outward to a specified angle (generally 90 degrees) to show its defects. After the test, check whether there are any defects such as cracks in the deformation, and determine whether the metal pipe crimping process is qualified


Hydraulic test

The two ends of the metal pipe are closed, and liquid (water or oil) is introduced into the pipe. When the pressure in the pipe increases to a specified value, check for cracks, leakage, wetting or deformation (expansion) to determine the quality and The ability to withstand the pressure of the fluid in the pipe.

Tips: A106 pipe is formulated specifically for high-temperature and high-pressure service, usually in power generation applications. High-pressure, high-heat service environments put added stress on pipe, so seamless pipe types are preferred in those settings since they’re at less risk of failure under stress than their welded counterparts.
 

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