Steam pipeline explosion in Dangyang, Hubei
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The principle of a coal gangue power plant is the same as that of a conventional thermal power plant: it uses the heat generated by burning coal gangue to heat a boiler, producing high-pressure steam that drives a turbine. The turbine and the generator are connected on the same shaft, thereby enabling the generator to produce electricity. Between the boiler and the turbine, there is a high-pressure steam pipe that connects the two, which is the pipe that exploded in this incident. Explosions can occur due to weak welds in high-pressure steam pipes, or as a result of aging. The steam inside such pipes is usually at a temperature of five to six hundred degrees Celsius; \"in the event of an explosion, it can instantly fill a large area, putting the equipment and people there at risk.\" Steam pipes are not the core of a power plant, but they serve as the \"lifeblood\" that connects the boiler and the turbine; they are the source of power for the generator, which is why they are so important. 1. No inspection or flaw detection was carried out before debugging. 2. What caused the explosion? 3. No partition walls are installed in the control room and the pipe room. 4. All sea friends are invited to participate in the discussion.
As special equipment, pipeline-level welds must be inspected regularly; failing to conduct such inspections or engaging in fraud will inevitably lead to serious safety accidents.....
The pipelines definitely need to be inspected. I’m not familiar with power plants, so I’m not sure if there are any requirements regarding the isolation of explosion-proof areas in such plants
In the power plants I’ve seen, the four main pipelines are at a certain distance from the control room; it is likely that in this accident cracks in the welding joints were not detected, leading to brittle fracture under stress.
I hope Haiyou can upload the operating parameters of the pipeline involved in the accident as well as information regarding the causes of the accident.
It is practical to discuss this topic.
High-pressure and high-temperature pipeline welds need to be inspected by radiography
Modern supercritical units are almost all 100% ultrasonic.
1. Flaw detection of pressure pipeline welding quality. 2. Pressure testing 3. Is there an issue with rushing the trial operation?
Let’s wait for the accident report. Both the first and third points mentioned by the original poster make sense: there must have been issues with the inspections and flaw detection prior to testing, otherwise no leaks would have occurred. There are no explosion-proof walls between the control room and the pipelines, which is why the control room was affected.
Personally, I think there are issues with the design or construction: process pipelines should not pass through the control room, but this design, in which they share the same space separated only by glass windows, is also problematic. Explosion-proof walls should be used to separate them from production equipment and pipelines.