Why is it difficult to cut welds by gas cutting?

Because the weld you cut is not welded well, there is slag in it, that is, there is no penetration. The melting point of the coating is different from that of iron, and the coating is blocked inside, so it is not easy to cut. Therefore, the landlord needs to slowly blow the melted coating aside with hyperbaric oxygen to make it visible, and then cut the weld according to the normal cutting method. On the contrary, if the welding master is skilled and can weld the weld thoroughly, there will be no slag hole in it, so it is not difficult to cut it.