The pipeline is subjected to negative pressure
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May I ask everyone, can a pipe with a nominal PN1.6 rating withstand negative pressure (external pressure)?
The pipeline itself is fine; the problem lies in the connections!
It’s also related to the pipe diameter, I guess,,,
Your confusion might stem from the question of how to determine whether a pipe that can withstand certain internal pressure can also handle external pressure Or what level of external pressure can it withstand? Answer: Whether negative pressure can be tolerated depends on the magnitude of the negative pressure and the thickness of the pipe wall. It’s a bit tricky to understand, huh. The actual considerations are as follows: Assume the negative pressure value is V1; calculate a wall thickness value A2 based on the internal pressure; determine what the maximum negative pressure B that a pipe with wall thickness A can withstand is; compare B with V – if B ≥ V, then the value of A is acceptable; otherwise, the value of A needs to be increased. This process of calculation and comparison is repeated until B ≥ V is achieved