Can pipeline alignment be done by heating?
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Our factory is currently working on piping installation. Since the quality of the materials is not very good, there is a significant misalignment between the elbows and the pipes. The construction team uses welding to heat them up and then hits them with hammers. Is this method in compliance with the standards? Will it have an adverse effect on the pipes? Will it reduce the performance of the welded area? The pipe material is 20#. Another issue is that the pipes are misaligned; the construction team then uses heat to warm them and pours water on them, which allows the pipes to return to their proper position. The construction team said it’s fine to heat the carbon steel pipes; they do that all the time. I don’t understand why, but common sense tells me that heating them with fire should be wrong. Moreover, after heating them, they poured water on them – surely that makes the pipes more brittle? They say that carbon steel pipes can be heated with fire, but stainless steel pipes cannot. Could someone please explain to me whether their approach is correct? Thank you all!
It can be baked over fire, and it needs to cool naturally; water cooling is not allowed.
Thank you. . . . . . . . . . .
It can be baked; that’s what we do when we can’t install pipes at our workplace
This post was last edited by “Life Played a Joke” on September 22, 2015, at 13:08. Those who say it’s acceptable are definitely contractors with poor skills or who cut corners; regulations explicitly prohibit aligning pipes by heating them. Similarly, it is also not possible to achieve this by deforming the compensator or forcing the joints together; such methods will significantly increase the local stress in the pipes, affecting their safety during use.