What is special about “special applications” conversion groups?

ASTM D1250 supports calculations of volume correction factors and base densities for four different product types:

1 : Crude Oil

2: Products

3: Special Applications

4: Luricants

Special Applications may be utilized for products which do not fall into any of the other product types, i.e. 1, 2 or 4.

In contrast to product types 1, 2 or 4, the fixed product density at base conditions must be defined in the SAP Material Master for SAP QCI and MQCI conversion groups with product type 3, as well as the product specific thermal expanison coefficient. Historically, these two values are defined in the SAP Material Master without UoM.

For SAP QCI conversion groups it is assumed, that absolut density values are given in kg/m³ and the thermal expansion coefficient in 1/°C or 1/°F (depending on the ASTM D1250 version).

MQCI conversion groups are provided – for testing – within the client 045 template where the fixed density and thermal expansion coefficient can be entered with correct UoM and valiable values. In production, one must fix these values by setting the reading group protection field (output only). Also, due to a rigorous error check in the SAP material master, MQCI conversion groups with product type 3 also require maintenance of the two values (w/o UoM) in the SAP material master, but are not used for the MQCI calculations.
Thus, maintenance of identical values as in the reading group (or O3DEFAULTS) is required/recommend.
Some SAP applications (e.g. SAP Tank Management) do read the material master values before calling the central SAP QCI function module and overwrite any other values or may this way create an inconsistent QCI call. Thus, external systems cannot pass their own fixed density ( and thermal expansion coefficient ) to SAP Tank Management.

 

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