Pipeline notification matters
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The construction contract was signed in 2013; it is a general contracting agreement for construction work. Construction was suspended for 5 years, and work resumed in 2018. Now, the qualifications related to pressure pipelines and special equipment have expired. After coordinating with the owner, the installation work for these pipelines and equipment has been subcontracted to other construction firms. The subcontracting firm and my own construction unit are working on the same project, which raises issues regarding the notification requirements related to special equipment. Please ask the forum members to help solve the following problem. 1. Except as stated in the regulations regarding pressure pipelines that no notification is required for DN50 and below, is it still necessary to provide notification for UPVC pipes? The pipeline grade is GC3. 2. In the notification of equipment and pipelines for subcontractors, can the pipelines of both the subcontractor and the main contractor be listed together? The projects of the two construction companies constitute a single project.
What medium flows inside UPVC? Wastewater? It’s not easy to classify pipelines as GC3 these days.
Can plastic pipes be used as pressure pipes? ?
Can plastic pipes be used as pressure pipes? ?
It’s marked as GC3 in the pipeline naming table; I’m totally stunned.
In UPVC, coagulants and flocculants are used; the operating pressure is 0.2 Mpa, while the design pressure is 0.3 Mpa. The operating temperature is ATM, and the design temperature is 40 degrees. Currently, the specifications for GC3 are: a pressure of less than or equal to 1 Mpa, a temperature range of greater than or equal to -20 degrees and less than or equal to 185 degrees, and it is intended for use in industrial pipelines for non-toxic, non-flammable fluids. I don’t know what the design rationale for this pipeline is; maybe by getting it as close to GC3 as possible, more design fees can be obtained? Even the galvanized pipe of the face washer got a GC3 from me. . . .
1. First, classify and grade the pipelines according to the new pressure pipeline classification system; this is relatively simple. All pipelines that fall under the relevant pipeline regulations must be reported, as these regulations do not apply to non-metallic pipelines. 2. In principle, the reporting is carried out uniformly by the general contractor, and it is generally not allowed for each subcontractor to report on their own
Pressure pipelines are not limited to metal pipes; any type of pipe that meets the definition is considered a pressure pipeline.
Pressure pipelines do not include non-metallic pipelines
There’s nothing to argue about this; it applies to pipes of any material. If you look at the definition of pressure pipes, it only mentions pipes in general, not metal pipes specifically, and this is also the case in practice