New Ammonia Cold Store: Split Project or Single Hazardous Production Facility?
A cold-storage company has completed a new ammonia refrigeration plant and wants to begin commissioning on Monday. The system holds 18 t of ammonia, includes two pressure vessels rated at 1.6 MPa, and serves a 10 t overhead crane. The site also has an 80 m³ diesel tank for standby generators. The operator argues that the ammonia charge is below the 50 t threshold for a hazardous production facility and that the crane is below 20 t, so no industrial safety declaration is needed. The plant is connected by a live ammonia pipeline to the company’s existing cold store, and the project was built in two phases under separate contracts but with one control room and one operating procedure. The state inspector has not yet registered the new plant. The company asks whether it can commission first and file documents later.
1. Is the new plant a hazardous production facility, and how should the phased construction affect identification and classification?
Read the worked answer
Do not decide this by looking only at the 18 t ammonia charge or the 10 t crane in isolation. Identification of a hazardous production facility is based on the presence of hazardous substances and hazardous technical devices/processes, not on a single convenient threshold. Ammonia is toxic, the plant contains pressure equipment, and it uses a lifting structure. More importantly, the new plant is connected by a live ammonia pipeline to the existing cold store and shares one control room and one operating procedure. That makes it part of one production complex. Splitting the project into two construction contracts does not split the industrial safety object if the process is technically connected.
The correct approach is to identify the whole connected facility, determine its hazard class under the applicable classification criteria, and then apply the registration and declaration duties for that class. The operator should not be allowed to commission first and “file later”; registration and the required industrial safety declaration must be settled before operation. If the operator disagrees with the class, it should document the basis and seek a reasoned decision, not simply omit the facility.
2. What pre-commissioning steps must be completed, and what should the inspector do if commissioning starts without them?
Read the worked answer
Before commissioning, the operator should: identify and register the facility in the state register of hazardous production facilities; classify it; prepare the industrial safety declaration where the class requires one; obtain industrial safety expert review for the project and technical devices where required; confirm that pressure equipment and the crane have valid examination/testing and permits for use; appoint responsible persons and approve operating, maintenance and emergency procedures; and ensure personnel are trained and certified for the work.
If commissioning starts without these steps, the inspector should not treat it as a paperwork problem to be fixed after the fact. The inspector should record the unregistered operation, suspend the hazardous activity or the specific technical device, and initiate administrative liability for operating a hazardous production facility without registration/declaration. The inspector should also check whether the live pipeline connection creates an immediate risk and require a written rectification plan with a realistic deadline. Retrospective filing after start-up should not be accepted as compliance.
3. The operator says the ammonia charge is below 50 t. How should that argument be evaluated?
Read the worked answer
The argument is too narrow. First, 50 t may be a threshold in one criterion, but it is not the only identification criterion. The facility also has pressure vessels and a lifting structure, and it is connected to an existing ammonia system. Second, even if each phase alone fell below a threshold, the connected process and common control room can make the object a single facility. Third, the hazard class is not set by the ammonia tonnage alone; it depends on the aggregate criteria, including the hazardous substance inventory, pressure, process conditions and location.
The correct response is to require a documented identification calculation covering the whole connected plant, not just the new phase. If the calculation shows the facility is below the class that triggers a declaration, the operator must still register it if it meets another hazardous criterion and must maintain the required technical-device examinations. If the calculation shows a higher class, the declaration and expert review must be completed before commissioning.