Pipe segment material
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This post was last edited by jndxzjl on 2017-11-17 at 17:53. I…
It’s best to write down the year. . Because for many standards cited as references, some include the year while others do not; it is specifically stated that for those with a year indicated, that year should always be used as the reference. For those without an indicated year, the latest available year shall apply.
I work in ocean engineering; the standards are up-to-date, but they don’t necessarily have to be the strictest. Take the DNV-OS-F101 standard as an example: the newer the version, the lower the acceptance criteria for pressure tests. The pressure acceptance criteria during the holding process have evolved from being between 99% and 101% initially, to now a level greater than 99% being acceptable.
The parts on our drawings are labeled with the standard year.
For those with a specified standard year, the stated year shall apply; for those without, the latest version shall apply. However, the update intervals for standards in China are long, and each update can bring about significant changes, causing many difficulties in design and use. For example, the pipes of model SH3405 have seen significant changes in the latest version; they are now more in line with American standards. However, suppliers say that it is difficult to procure the new version. Even the purchasing and manufacturing departments don’t pay attention to this; all the fittings are purchased in the old version. If the pipes happen to be purchased in the new version, won’t things get chaotic on site?
We don’t write it down, because the specifications are always updated, and one might accidentally write something that is no longer current. Since our materials are meant for long-term use rather than single-use, this issue does need to be carefully considered when it comes to specialized drawings for engineering projects. After all, changes in standards may require modifications to certain pipes or components, and keeping track of the year they were used can serve as evidence to prevent such situations from occurring. If the chief engineer asks you to write it, then go ahead and write it~ He’ll take responsibility if anything goes wrong
When creating a design, it’s necessary to include the year; the standard requirements vary from one year to another
It is generally not stated in the material list; it is usually written in the instructions
Previously, when we did designs, we only indicated the standard year in the specifications, without mentioning it in the material list. Later, during the certification review for pressure pipes at the company, feedback was given, so the standard year was added to the comprehensive material list, which is the list used by the client for procurement. However, the material list for the pipe sections mentioned by the original poster seems to be intended for use when ordering materials for single-line installation; it is not related to procurement processes, so it should not matter whether standard year numbers are included or not. If the original poster is referring to the pipeline material grade table, then the standard year should also be indicated there.