An IMPA code is a six-digit product reference used in marine purchasing to identify ship supply items consistently. It gives vessels, buyers and suppliers a shared reference for RFQs, quotations, purchase orders and stock records.
Product names are not always enough in ship supply. The same item can be described differently by a vessel, purchaser, supplier or warehouse team. An IMPA number reduces that ambiguity, but it should still be checked together with the item description, specification, unit and any vessel-specific requirements.
What is an IMPA code?
An IMPA code is a standardized six-digit identifier associated with a marine stores item in the IMPA Marine Stores Guide. The identifier helps maritime companies refer to the same type of product even when their internal naming conventions are different.
Ship suppliers use IMPA codes as structured product references. They can make an incoming request easier to search, help sales teams prepare a quotation and allow procurement or warehouse teams to connect the item with past activity.
What does IMPA stand for?
IMPA stands for the International Marine Purchasing Association. The association's marine stores reference system is widely recognized in maritime purchasing and ship supply workflows.
What does an IMPA number look like?
An IMPA code contains six digits. The number is an identifier, not a complete technical specification. Before quoting or ordering, verify the code against the current catalogue entry and check details such as:
- product description and intended use;
- size, capacity, material or grade;
- unit of measure and requested quantity;
- brand or approval requirements, when applicable;
- vessel-specific notes or acceptable alternatives.
How to search for an IMPA code
If an RFQ already contains a six-digit code, search it in an authorized IMPA catalogue or an IMPA-enabled maritime software system. Then compare the result with the written request instead of relying on the number alone.
- Enter the complete six-digit IMPA code.
- Open the matching catalogue or product record.
- Confirm the description, specification and unit.
- Review any notes supplied by the vessel or buyer.
- Record substitutions clearly before sending the quotation.
When no code is supplied, search by a precise product description and relevant attributes, then confirm the most suitable reference. See our practical guide to searching products with IMPA codes.
IMPA code, product description and supplier SKU
These fields serve different purposes and work best together:
| Reference | Purpose | What still needs checking |
|---|---|---|
| IMPA code | Shared marine product reference | Current description, unit and specification |
| Product description | Explains the requested item and attributes | Ambiguous wording or missing details |
| Supplier SKU | Identifies a supplier's own stock item | Correct mapping to the requested IMPA item |
A reliable product record can store all three. This makes it possible to receive a standard reference, select the supplier's exact stock item and preserve the original request details.
How IMPA codes are used in RFQs and quotations
In an RFQ for ship supply, the code helps the supplier find the intended product faster. Sales teams can use the same reference in the quotation so the buyer can compare the offer with the original request.
The code does not remove the need for a clear commercial line. A quotation should still show the offered description, unit, quantity, price, lead time and any substitution. This is especially important when the requested specification is unavailable or a locally sourced equivalent is proposed.
How IMPA codes support procurement
Procurement teams often compare prices from several sub-suppliers whose descriptions and internal SKUs differ. A common IMPA reference makes matching easier and helps prevent unrelated products from being compared as if they were identical.
Used consistently, the code can also connect a new requirement with previous quotations, supplier prices and purchase history. Buyers still need to validate the technical and commercial details before selecting an offer.
How IMPA codes support inventory management
Warehouses may receive the same product under several names. Mapping stock records to IMPA codes can reduce duplicate item cards and make searches more consistent across sales, purchasing and inventory.
A good inventory record keeps the IMPA code alongside the supplier SKU, normalized description, unit, location and stock movement history. That structure is more useful than storing the code as an isolated text field.
IMPA codes vs ISSA codes
IMPA and ISSA are separate marine product reference systems. Their numbers should not be treated as interchangeable. If a request contains a code, confirm which catalogue it belongs to before searching or mapping it to an internal product. Read the detailed comparison of IMPA and ISSA codes.
Common IMPA code search problems
- Incomplete or mistyped number: confirm all six digits with the requester.
- Description does not match: stop and clarify instead of assuming the code is correct.
- Unit differs: check whether the request is for a piece, pack, set, length or another unit.
- Old internal mapping: validate saved mappings against the current authorized reference.
- Code used without specifications: request the missing size, material, grade or approval details.
A practical IMPA-based workflow for ship suppliers
- Import or enter the vessel's RFQ without losing the original wording.
- Validate each supplied IMPA code and identify lines that need clarification.
- Map the request to the correct internal product or supplier SKU.
- Collect supplier prices and compare like-for-like offers.
- Prepare a quotation that preserves the code and clearly states what is offered.
- Carry the confirmed item into purchasing, delivery and stock records.
For more operational examples, see how IMPA codes are used in daily ship supply operations.
Using IMPA codes in maritime supplier software
A code becomes more useful when it is connected to searchable product records, RFQs, quotations, supplier offers and inventory movements. Maritime supplier software can keep these records linked so teams do not need to recreate product mappings for every request.
Maritime Server helps ship suppliers organize IMPA-based product data across quotation, purchasing and stock workflows. The objective is not simply to store a number, but to keep the complete commercial and operational context around the item.
Frequently asked questions about IMPA codes
What is an IMPA code?
An IMPA code is a six-digit product reference used in marine purchasing to identify ship supply items consistently across RFQs, quotations, purchasing and stock records.
What does IMPA stand for?
IMPA stands for the International Marine Purchasing Association.
How many digits are in an IMPA code?
An IMPA code contains six digits. Check the code together with the description, specification, unit and vessel requirements.
How do you search for an IMPA code?
Search the complete six-digit number in an authorized IMPA catalogue or an IMPA-enabled maritime software system, then verify the returned description, specification and unit before quoting.
Are IMPA and ISSA codes the same?
No. They are separate marine product reference systems, and their numbers should not be assumed to be interchangeable.
Can IMPA codes be used in RFQs and inventory records?
Yes. They can help identify requested products, compare offers, prepare quotations and connect purchasing history with inventory records.
Conclusion
IMPA codes give maritime buyers and suppliers a shared six-digit product reference. Their real value comes from using them consistently while also validating the description, technical specification and unit.
When IMPA references are connected to RFQs, quotations, purchasing and inventory, ship suppliers can search faster, reduce product mismatches and build a more reliable operational record. Explore Maritime Server for ship suppliers to see how these workflows can be managed in one platform.