The pipe produced by the welded pipe unit is made of welds. Whether the welds can meet the standard is a key problem. One of the standards for inspecting the pipe quality is whether the flaring meets the standard. If it does not meet the standard, the pipe is unqualified. What are the reasons for the unqualified flaring of the pipe? Let's analyze it.

The first is the material factor of pipes. Not all pipes can be flared after being produced by the welded pipe unit. The original factors of material properties determine that some materials can not be further processed, or can only be secondary processed after other processing processes, such as annealing, and then can continue deep processing.

In addition, the factor of welding process should not be underestimated. The pipe welding unit does not only need to weld the pipe, but also consider the weld protection, such as gas protection, generally inert gases, such as argon and nitrogen, so as to achieve an oxygen-free environment for welding and avoid welding oxidation as far as possible. Such welds can often be flared.

The last is the control of the flared volume. Flares cannot be processed infinitely. There is a proportion. Different materials have different flared upper limits, so these need to be paid attention to and analyzed.

After talking about the flaring problem of pipes produced by so many welded pipe units, have you found the problem that belongs to you? Do you know how to solve it? tell me.

Key words:welded pipe unit

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