Key facts
Code summary
Code 2391
Official title Manufacture of refractory products
Version PSIC 2019
Source layer PSA / BSP
Section C - Manufacturing
Mf
PSIC 2019 Navigation-first hub Class 2391 - Manufacture of refractory products
PSIC Class 2391 covers Manufacture of refractory products. Current child subclasses include Manufacture of Refractory Products. This four-digit layer is useful when comparing neighboring activities before landing on the...
Next step
Child codes
These are the next codes most users should open after this hub page.
Nearby codes
2392
Manufacture of clay building materials
2393 Manufacture of other porcelain and ceramic products
2394 Manufacture of cement
2395 Manufacture of lime and plaster
2396 Manufacture of articles of concrete, cement and plaster
2397 Cutting, shaping and finishing of stone
2399 Manufacture of other non-metallic mineral products, n.e.c.
About this level
Practical summary
Class 2391 sits in the PSIC 2019 hierarchy under C Manufacturing > 23 Manufacture of other Non-metallic Mineral Products > 239 Manufacture of non-metallic mineral products, n.e.c.. This class usually fans out into more specific subclasses such as Manufacture of Refractory Products. It is the level people use when they already know the activity family but still need the exact five-digit match.
Administrative context
Where this code is used
This class is used when a business can already narrow the activity family and only needs to compare the final subclasses such as Manufacture of Refractory Products. It is the level most often checked before a five-digit decision is finalized.
Selection note
How to choose it
Use this class to choose between its final subclasses such as Manufacture of Refractory Products. If two options look close, compare the exact activity, the outputs and the way the business actually earns revenue.
Official note
Source-backed description
This class includes: Manufacture of refractory mortars, concretes etc. Manufacture of refractory ceramic goods: heat-insulating ceramic goods of siliceous fossil meals refractory bricks, blocks and tiles, etc. retorts, crucibles, muffles, nozzles, tubes, pipes, etc. Manufacture of refractory articles containing magnesite, dolomite or chromite
FAQ
What does PSIC Class 2391 cover?
PSIC Class 2391 is the four-digit layer that sits just above the final subclasses and usually defines the activity family for Manufacture of refractory products.
How do I compare Class 2391 with the sibling classes?
Read the neighboring classes and compare the exact wording of the child subclasses. Nearby options include 2392 Manufacture of clay building materials and 2393 Manufacture of other porcelain and ceramic products.
Why does Class 2391 matter for a filing decision?
It is usually the last broad checkpoint before the five-digit subclass choice, so it is the right place to catch near-miss classifications.