There are established industry norms and regulatory requirements regarding the inspection timeline following the installation of cold storage sandwich panels, as detailed below:
Standard Inspection Timeline: Once the overall cold storage project is completed, the contractor first conducts a self-inspection. Subsequently, the equipment is put into operation under load for a continuous period of 3–5 days. After confirming that all performance indicators meet contractual requirements, the client is notified to proceed with the formal inspection.
Special Process Requirements: If the project involves a sprayed polyurethane insulation layer, a 48-hour curing period is required after spraying; the specific sub-item inspection can only take place once the material has fully cured.
Mandatory Testing Requirements: Following the implementation of the 2026 updated industry standards, mandatory parameters-such as the bond strength of the sandwich panels-must undergo specialized testing in a constant temperature and humidity environment. This testing phase adds an additional 1–2 working days to the overall inspection timeline.
