For pressure pipelines carrying flammable and explosive media, can supports be welded directly to the pipeline?
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This post was last edited by ZHANGZHANTJ on 2015-9-20 17:53. For pressure pipelines carrying flammable and explosive media (natural gas), with a diameter of 2”/2.5 MPa, can supports be welded directly to the pipeline?
I don’t see anything wrong with it.
The bracket can be welded directly to the pipe, but it must have a sliding end
We use brackets and clamps; welding is generally not used
No, it must be replaced after passing the qualification test through sampling and analysis.
I’ve seen quite a few instances of welding brackets onto gas pipelines before. The pipeline brackets used at the beginning of plant construction all came with clamps. Now, there is a process improvement project being carried out by another construction company, and it’s necessary to add an additional pipeline; this time, brackets are being welded directly onto the pipeline. I wanted to discuss this with fellow professionals, as it seems that the regulations don’t specify any requirements in this regard.
The pipe supports of any pipeline must not be welded to the pipeline.
It shouldn’t be welded directly to the pipe; if there is vibration and friction, it can easily tear the pipe, so it should be fixed to a clamp； Or on the spring bracket; the clamp or spring bracket can be welded to the pipe rack
If it’s not flammable or explosive, it can’t be welded either – then what kind of welding process is this? Flammable and explosive materials should be separated from other pipe supports, with insulating pads used in between. , to avoid it being mistaken for the welding base line. This is easily overlooked.
This post was last edited by canoe7665 on 2015-9-20 22:47. Hehe, in the standard drawings for pipe racks specified by HG/T 21629-1999, welding is an option; of course, pipe clamps can also be used. I haven’t been involved in pipeline design for a long time, but in our previous projects we also had gas pipelines and hydrogen pipelines. For new pipelines, I’ve seen the use of sliding frames that allow for direct welding; if anyone thinks direct welding isn’t feasible, please explain in detail. Thank you
Under no circumstances should brackets be welded to pipes, as this alters the distribution of elements and the alloy crystallization, thereby changing both the mechanical properties and corrosion resistance； 2. The pipe lengths and the supports’ lengths vary, and the materials used are often different as well; hence, the expansion coefficients differ, and the direction and amount of expansion displacement also vary, which can lead to pulling forces between them. 3. Maintenance is inconvenient