I have 3 methanol tanks with a capacity of 20 cubic meters for a wastewater treatment project. If pressure pipelines and pressure vessels are not involved, is it possible to prepare design drawings under Class B environmental protection standards?

Alcohols are major hazard sources; can they be classified as environmental protection grade B?

It cannot involve any sources of danger; this must be handled by the design institute.

Which clause states that this must be done by a design institute? The Environmental Protection Grade B also refers to design institutes

Does the design scope for Environmentally Friendly Class B include atmospheric-pressure chemical pipelines and pressure vessels? This cannot be done by others; at minimum, a Class B qualification in the chemical industry is required.

The total capacity of the 3 methanol storage tanks, at 20 m³ each, does not reach the threshold amount required to constitute a major hazard source.

Where can I find out this critical value?

According to GB 18218-2018, the threshold quantity for methanol is 500 tons

This probably won’t work. Methanol is a hazardous chemical that is subject to strict regulation. In accordance with Order No. 45 of the General Administration of Work Safety and Document No. San [2013] 76, for projects that fall under the category of “two key areas and one major project”, the design unit must have Class A qualifications.

It mainly depends on whether this wastewater treatment project is declared or registered as an “environmental protection project”. If so, enterprises with Class B environmental protection qualifications should be capable of undertaking it. As for the qualifications required for the design of pressure pipelines and pressure vessels, they are of a professional level; companies engaged in environmental protection consulting and design can also obtain such qualifications. Alternatively, if such design is involved in a project, it can be carried out directly by equipment manufacturers or similar entities. Order No. 45 of the State Administration of Work Safety and Document No. San [2013] 76 relate to large-scale construction projects that fall under the category of “two key areas and one major project,” requiring design units to possess comprehensive qualifications or Class A qualifications in their respective fields and specialties. This wastewater treatment project generally does not qualify as a large-scale construction project.