Heated pipeline
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This post was last edited by wx_Ink Fragrance 822822 on 2025-2-19 10:04. The steam tracing pipeline has a diameter of DN10, a wall thickness of 1.5 mm, and the material should be 304. Why do cracks occur in pipelines during use?
The reasons for cracks in steam tracing pipelines may include: 1. Improper material selection: Although 304 stainless steel has good corrosion resistance, prolonged use at high temperatures can lead to a decline in its mechanical properties. 2. High-temperature effects: The high temperature of steam can cause thermal expansion in the pipeline materials, and repeated cycles over time may lead to material fatigue and the formation of cracks. 3. Internal pressure effect: Excessively high pressure inside the pipe, exceeding its capacity to withstand it, can also lead to cracks. 4. Installation stress: Excessive force or uneven force applied during installation leads to stress concentration, which may result in cracks over time. 5. Corrosion: Although 304 has good corrosion resistance, corrosion can still occur in certain special environments, such as stress corrosion cracking. It is recommended to conduct regular inspections and maintenance of the pipelines, and to ensure that suitable materials and installation methods are used. .
It doesn’t seem like 304 on the surface; are there many cracks like this on it?
Actual operating parameters need to be provided; otherwise, experts won’t be able to conduct any analysis either.
For example, cracks appear every few meters; in winter, when heating is applied, ice forms everywhere, and because there is insulation covering it, it’s very difficult to identify the source of leaks
It seems to be caused more by brittle bending at low temperatures; in the case of frost cracking, vertical cracks are common
When used continuously, it feels like stress tearing.
First, perform PMI on this tube to check the composition of the material.