9902.15.38 - Economizers comprising auxiliary plant for use with boilers of heading 8402, with a pressure capacity of 10686.87 kPa, certified by the importer as for use in the pulp and paper industry (provided for in subheading 8404.10.00)

This HTS category, 9902.15.38, specifically classifies economizers designed as auxiliary plant for use with boilers classified under heading 8402. These economizers are characterized by a pressure capacity of 10686.87 kPa and require certification from the importer confirming their intended application within the pulp and paper industry. This specific provision is found within Chapter 99, which deals with temporary legislation and modifications, indicating its specialized and potentially time-limited nature.

Given that this is a leaf node, there are no further subcategories. The primary distinguishing factor for this classification lies in the confluence of specific technical specifications (pressure capacity) and a declared end-use in a particular industry (pulp and paper), as validated by the importer. Unlike general boiler components or other auxiliary equipment that might fall under heading 8404, this provision isolates economizers meeting these precise criteria, likely due to specific trade agreements or temporary import considerations. Its placement within Chapter 99 differentiates it from more permanent classifications found in earlier chapters of the HTS.