How did –29°C come about?
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“For pipes for which alternative testing is specified under this standard, and for pipes with a design temperature below –29°C, 100% radiographic or ultrasonic inspection must be carried out……” Where does the value of –29°C come from?
The -29°C here refers to the design temperature, which is the lowest temperature that the pipeline can withstand. When conducting alternative tests, if the design temperature of certain pipes is below -29°C, 100% radiographic or ultrasonic testing must be carried out to ensure their safety and reliability. This is to prevent issues such as pipe damage or leakage in low-temperature environments. Therefore, -29°C is determined based on the design requirements of the pipeline and its operating environment. .
Remember, it’s minus 29. Thank you!
They are asking why it is -29°C? Not -39°C, -49°C, etc.?