Classification of waste water pipelines
Thread Content
This post was last edited by mada on 2018-5-7 at 16:02. The waste pipeline contains small amounts of organic substances such as acrylonitrile and hydrocyanic acid. According to clause 4.6b of SH3501-2011, it seems possible to determine the pipeline grade by calculating based on the composition ratios. How should this calculation be carried out? I would be very grateful if experienced friends could provide some examples. Furthermore, as is usual, almost all pipelines carrying toxic media cannot be used to transport pure toxins; can their toxicity be classified according to clause b, rather than being simply classified in accordance with GB5044? If possible, many pipeline levels should be reduced appropriately, which would allow the inspection rate to be significantly lowered as well.
GBZ230 has replaced GB5044, which has been repealed. GBZ230 provides a method for calculating toxicity, which is done based on the proportion of the medium.
There is still a lot of controversy surrounding the replacement of GB5044 with GBZ230, and it seems there is no clear official information on this matter. I consulted two design firms; they were very lazy. Whenever they saw that the medium contained substances such as acrylonitrile and hydrocyanic acid, they would handle it according to SHA1 standards. This does ensure safety, but the client has to bear the associated costs.
There is no dispute that GBZ230 has replaced GB5044. The reason why design institutes do not use GBZ230 is that it is difficult for non-specialists to accurately determine the toxicity of fluids; I myself work in a design institute, and we also do not use GBZ230. After 5044 was abolished, HG/T20660 became the standard to be used.
Generally, if a substance is designed to be toxic, it is treated as such. Avoid taking design risks.
This post was last edited by ZESTC on 2018-5-11 at 12:42. First, GB5044 has not been repealed; please refer to the notes preceding GBZ230. GBZ230 is a supplement to GB5044, not a replacement for it. Second, SH3501 provides a classification system for mixed toxic media, based on the amount of toxic materials present and their toxicity levels. For details, see sections 4.6, Table 3, and Table 4 of SH/T3501-2011. Why can’t I upload the picture?
**Announcement by the General Administration of Quality Supervision, Inspection and Quarantine and the **Standardization Management Committee (No. 6 of 2017): “Announcement on the Abolishment of 396 Mandatory **Standards”” —— which includes details on the abolition of 5,044 standards. It has indeed been abolished.
Thanks for the reminder! After the release of GBZ230-2010, I checked GB5044 many times and found that it had not been repealed. Moreover, many of those standards had been in use all along, and they have finally been abolished this time!
GB5044 has been repealed. In accordance with Announcement No. 6 of 2017 and the conclusions resulting from the consolidation and simplification of mandatory standards, this standard was repealed as of March 23, 2017