Why isn’t drawing review required for the process?

By convention, documents are static, while people are dynamic.

I’m not sure whether you are asking from the perspective of the constructor or that of the design institute, so I can only provide a general response: The only drawing that truly belongs to the process engineering field is the P&ID diagram. This diagram was discussed and revised numerous times during the design phase, and the final set of construction drawings is the result of multiple reviews and further revisions. In design institutes, the piping diagrams are designed by the piping specialty ； For construction projects, the teams responsible for general engineering and piping work are usually the same; the review of construction drawings focuses primarily on the piping diagrams. As for the basis, here is a screenshot of the relevant section of GB50235:

Process review, and there’s also final approval at the end

Why isn’t drawing review required for the process? Because chemical processes are extremely complex, and few people can fully understand their principles, it is impossible to review the drawings.

Legal basis: 1. Article 11 of the Regulations on Quality Management of Construction Projects stipulates that the project owner shall submit the construction drawing design documents to the construction administrative department of the people’s government at or above the county level, or to other relevant departments, for review. 2. Article 3 of the “Measures for the Review of Construction Drawing Design Documents for Housing Construction and Municipal Infrastructure Projects” (Order No. 13 of the Ministry of Housing and Urban-Rural Development) stipulates that: A system for reviewing construction drawing design documents (including survey documents; hereinafter referred to as construction drawings) shall be implemented. Construction drawings that have not passed the review shall not be used. 3. The “Guiding Opinions on Issues Related to the Review of Construction Project Drawing Design Documents” (Jian She Ji [2000] No. 21) emphasizes that the review of construction project drawing design documents, as a fundamental procedure that must be followed in construction projects, should be adhered to by all relevant parties.

The process also requires review of drawings; first, the client reviews the PID and PFD； Second, the design institute itself also has a three-level review system of \"design, verification, and approval\"“ ； Third, during the construction drawing phase, the owner will also arrange for the supervisor to organize the review of the construction drawings. As for **authorized construction drawing reviews, due to the complexity of chemical process engineering, the professional expertise is often insufficient to carry out such reviews.

This post was last edited by The wise are enlightened on 2017-11-28 21:13; it relates to the fields of architecture, structure, and general planning. Sometimes it also involves a bit of knowledge in the plumbing and water supply field.

What I mean is the review of construction drawings at the drawing review center

The review of construction drawings is aimed at professionals in related fields of the construction industry, such as architecture, structure, general planning, plumbing and fire protection, electrical engineering, and HVAC. This is formed by the **industry-specific characteristics and historical reasons of our construction industry. **Among the industries involved in construction projects, the construction industry accounts for the vast majority, while the combined share of the other industries is not high. Furthermore, other industries, whether it’s the chemical industry or sectors such as electricity, metallurgy, nuclear power, agriculture, and forestry, all have their own specific production processes. Especially in the chemical industry, where there are a great variety of processes, it’s impossible to establish unified design standards; so how can there be any talk of reviewing construction drawings? Moreover, process engineering is a systematic discipline; at present, even individual unit operations cannot have established norms or standards, let alone the entire process. Without regulations and standards, there is no basis for reviewing drawings. Furthermore, the characteristics of manufacturing processes also determine their differences from other fields. Manufacturing is a process of continuous improvement; even after a factory is built and put into operation and meets the requirements of the design specifications, technical upgrades and improvements continue to take place during actual production, as technology itself is constantly evolving.