There are conflicts between standards, between standards and acceptance specifications, as well as regarding the scope of application of these standards; please add more details

Thread Content

This post was last edited by 328104062 on 2017-3-24 at 12:59. Standards and specifications are merely a framework and structure for design; the best design is one that suits the actual conditions on site. On-site installations must comply with the standards set at the time of design (whether they are product quality standards, fire safety standards, etc.). As pressures related to safety and environmental protection increase, design standards and specifications are also being updated continuously. Therefore, it is advisable to use the latest standards from the outset of design, or to go slightly ahead based on actual conditions, in order to avoid the need for modifications right after the installation is completed. In various reviews, the assessment of standard timeliness has always been a weak point for owners; due to the different levels of involvement, few owners take part in the updating and reissuance of standards, so it is necessary for the design institute or the overall project management team to ensure proper oversight. There are also issues related to standards. On one hand, we need to understand the standards and compare them with reality; on the other hand, we need to understand to which project a standard applies and select the appropriate one. For example, regarding the pressure used for testing, should it be based on the top or bottom of the container? How many pressure gauges should be used during testing, and which gauge’s readings should be taken as the basis? There are different opinions within the standards as well, so the decision can only be made after consulting with the client based on the actual circumstances. The selection of combustible gas detectors/toxic gas detectors is determined in accordance with fire safety standards such as 50016/50160, or toxic substance standards like GB5044 and GBZ230. To minimize risks, it is generally done based on the stricter of the relevant standards ； The specifications for equipment use are generally based on national standards, which will be covered in the section on commissioning. Attention must be paid to the scope of application of standards; for example, standards such as GB50016 and GB50160 specify the classification of fire hazard levels for different types of media, as well as the corresponding fire compartments and separation distances. In terms of lightning and static electricity grounding regulations, different standards are selected and applied depending on the context, such as oil depots, storage and transportation facilities, gas stations, long-distance pipelines, gas pipelines, and petrochemical plants. Standards such as GB/T20801-2006, GB50235-2010, GB50028-2006, HGJ28-90 (revised to HG/T20675-1990), GB50517-2010, SH3097-2000, SH3051-2001, GB50074-2002, GB50156-2002, and HG/T23002-92 must all be considered when choosing the appropriate standard. As for pipeline coloring, it should be done in accordance with SH3043, GB2893, GB7231, or the enterprise standard Q/SY134 – the choice depends on the specific situation. Only the right standard should be used for each application. In cases where the standard does not provide clear instructions or allows certain flexibility, such as indicating that something can be done in a particular way, it is best to refer to the original regulations, such as the basic national standards, and examine their annotations, explanations, and relevant provisions. If the standard indeed does not cover the matter or is unclear, then appropriate interpretations can be used for implementation. For example, according to SH3043, gases should be colored yellow (light yellow, dark yellow, orange-yellow, etc.), and this should be verified against the relevant acceptance standards. Generally, corporate standards are stricter than industry standards and also stricter than **standards. When there are conflicts between these standards, the strictest one should be followed. Such conflicts actually provide greater flexibility in design, but they pose difficulties in terms of review and acceptance processes. It is best for the standards used for review and acceptance to correspond with the design standards – in other words, the design should be tailored to the applicable standards. Therefore, it is also necessary to be familiar with the acceptance specifications; otherwise, the designed product cannot be put into production. The general contractor usually only understands the design specifications and is not aware of the acceptance specifications, while the client also has a limited understanding of both the design standards and the acceptance specifications, which leads to problems during the subsequent acceptance process. Please add more – what other standards show conflicts?