Steel ring reinforced (also known as steel wire mesh) polyethylene (PE) sludge suction pipes are commonly used in sewage treatment, river dredging, and mine tailings transportation. They combine the corrosion resistance of polyethylene with the high strength of steel rings, but they also encounter typical issues during use. Below are common problems, cause analyses, and solutions for steel ring sludge suction pipes, along with preventive suggestions.

1. Pipe deformation, collapse (being sucked flat): This is the most common problem under negative pressure suction conditions.

– Problem phenomenon: The pipe is partially collapsed, causing the inner cavity to narrow or become completely sealed, leading to a sharp drop or complete interruption of flow.

– Main causes:

1. Excessive suction vacuum: The pump’s power is too high or the inlet is blocked, causing the internal negative pressure to exceed the pipe’s maximum negative pressure tolerance (collapse resistance).

2. Incorrect selection: The strength and density of the steel ring reinforcement layer of the pipe are insufficient to withstand the negative pressure during operation.

3. External compression: The pipe is crushed by heavy objects or subjected to unexpected impacts.

4. Temperature effect: In high-temperature environments (especially in summer when the ground is exposed to sunlight), the PE material softens, reducing its pressure-bearing capacity and making it more prone to collapse.

– Solutions:

1. Immediately shut down the machine to prevent the pump from continuing to suck and exacerbate deformation.

2. Check and clear blockages: Inspect the pump inlet and the middle of the pipe for obstructions (such as stones, excessive silt, debris).

3. Adjust the pump’s operating conditions: If possible, appropriately reduce the pump speed or open the bypass valve to lower the suction vacuum.

4. Replace with a higher-pressure pipe: If the problem recurs, indicating that the current pipe grade is insufficient, replace it with a pipe of higher ring stiffness and better negative pressure resistance.

– Preventive measures:

– Correct selection: According to the maximum negative pressure of work, choose a pipe with a safety factor higher than the actual working condition (usually requiring the pipe’s negative pressure resistance value to be more than 1.5 times the working