The straight pipe section between the pipeline welds is insufficient
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According to relevant specifications, a certain length of straight pipe section must be maintained between the welds of the two pipes. If there isn’t enough straight pipe section (my pipeline has a diameter of DN150, and the straight pipe section between the two welds is only about 70 mm), are there any measures that can be taken to compensate for this?
No, it’s not possible; the regulations require that the minimum spacing be met
Directly push the fittings together: lol
In most cases, it’s not under special operating conditions; it seems to be done this way in all cases, although it doesn’t comply with the standards
Hehe, the regulations don’t allow it, but as long as you allow it, that’s fine
In my opinion, under certain circumstances, when it is not possible to ensure that the short pipe between the two welds meets the specifications, it is appropriate to handle the situation according to the actual conditions; it is also acceptable to perform 100% radiographic testing on both welds
Have the pipe fitting manufacturer make an extended pipe fitting
Sometimes this situation occurs, and there’s nothing else to do but accept it. The requirement that the distance between two welds on pipelines larger than DN150 should be at least 150 mm stems from considerations of construction feasibility and the welding influence zone. While it’s possible to meet this requirement in field construction, it isn’t very convenient; as long as the welding quality meets the specified standards, then there’s no problem
Use standard terms such as \"should\" and \"appropriate\". . . It’s not necessary. . In principle, it should be done this way, but exceptions can be made when there are reasons for it. .
If it is a pressure pipeline, it is best to construct it in accordance with the specifications
In this case, conduct physical and chemical tests; if the requirements are met, that’s sufficient – just produce a report based on those tests. :lol