When is on-site special inspection of a fabricator not required?

On-site special inspection of a fabricator is not required when the work is done in an approved fabricator's shop because approved shops are typically certified to perform specific types of fabrication in accordance with established standards and regulations. This certification often involves regular quality control procedures and inspections conducted in-house. Therefore, when fabrication occurs in such an environment, it is assumed that the necessary quality control measures are in place, and this can reduce the need for additional inspection at the site.

In contrast, if completed forms are provided, while that could demonstrate some compliance, it does not eliminate the need for inspection. Similarly, if the government requests onsite inspections, those must typically be accommodated regardless of the fabricator's approval status. Lastly, scheduling inspections solely during off-hours does not negate the requirement for them; it merely changes the timing of when inspections occur. In summary, the justification for the exemption from on-site special inspection hinges on the established quality assurance processes of an approved shop, which assures that the fabrication meets the required standards.