IRES Chapter III — Standard International Energy Product Classification

Chapter III (PDF pp. 34–53) presents the Standard International Energy Product Classification (SIEC): the internationally agreed definitions of energy products, arranged into the structure of a statistical classification [IRES, Ch. III, para. 3.2, PDF p. 34, 2018]. SIEC is defined entirely within this chapter — it is not a separate publication. This digest summarizes the chapter’s four sections; the classification system itself and every product definition are covered in full, with citations, on dedicated pages (linked throughout and listed at the end).

A. Introduction (paras 3.1–3.4)

Internationally agreed product definitions and classification are a basic tool for cross-country and temporal comparability of energy statistics, and for comparability with other economic statistics [IRES, Ch. III, para. 3.1, PDF p. 34, 2018]. SIEC categories are cross-referenced to the Harmonized Commodity Description and Coding System (HS) and the Central Product Classification (CPC) to facilitate that integration — particularly useful for HS, since international trade transactions in energy products are defined in HS terms [IRES, Ch. III, paras 3.2–3.3, PDF p. 34, 2018]. These correspondences are indicative rather than exact: HS/CPC categories are often broader than the matching SIEC category, though national or regional HS adaptations (e.g. the European Combined Nomenclature) can be more precise, particularly for refined petroleum products [IRES, Ch. III, para. 3.4, PDF p. 34, 2018].

B. Purpose and scope of SIEC (paras 3.5–3.12)

SIEC’s main purpose is to serve as a basis for national classification schemes, improving cross-country comparability; it is designed to be multipurpose and is periodically reviewed and revised [IRES, Ch. III, para. 3.5, PDF pp. 34–35, 2018]. Its scope covers fuels produced/generated by an economic unit and usable as an energy source, plus electricity generated and heat generated and sold to third parties — refined by rules on fossil fuels, fossil-fuel-derived products, and non-fossil fuels (worked through via the lubricants vs. plastics example). See SIEC Classification System for the full scope rules and Energy Products for how they precise the general energy-product definition introduced in Chapter II.

C. Classification criteria and coding system (paras 3.13–3.18)

SIEC categories are exhaustive and mutually exclusive, organized into ten top-level sections (eight fuel categories plus electricity and heat), a four-level section/division/group/class hierarchy, and four-digit numeric codes [IRES, Ch. III, paras 3.13, 3.17–3.18, PDF p. 36, 2018]. The primary/secondary and renewable/non-renewable distinctions are not explicit SIEC criteria — the full list is deferred to Annex A (not yet ingested) [IRES, Ch. III, para. 3.16, PDF p. 36, 2018]. The full code list, with CPC and HS correspondence columns, is Table 3.1 — reproduced in full in SIEC Classification System.

D. Definitions of energy products (para 3.19 and the SIEC code list)

The product definitions are the work of the Intersecretariat Working Group on Energy Statistics (InterEnerStat), reviewed and supported by the Oslo Group on Energy Statistics and the UN Expert Group on Energy Statistics — except the nuclear-fuel definitions (SIEC section 9), which fell outside InterEnerStat’s scope and were instead provided by the International Atomic Energy Agency (IAEA) [IRES, Ch. III, para. 3.19, footnote 23, PDF pp. 40, 53, 2018]. Section D runs the full length of the SIEC code list, section by section, each definition followed where relevant by a “Remark:” clarification. Rather than duplicate that material here, each SIEC section has its own dedicated product page (wiki/pages/products/), carrying every definition and remark with its own citation:

SIEC section	Page	Coverage
0	Coal	Hard/brown coal; coal products (cokes, patent fuel, BKB, coal tar, coke oven/gas works gas, recovered gases)
1	Peat and Peat Products	Peat (sod, milled); peat products (briquettes)
2	Oil Shale/Oil Sands	The raw sedimentary rock (distinct from oils extracted from it, classified under Oil)
3	Natural Gas	Natural gas composition, LNG, distinction from landfill gas
4	Oil	Crude oil, NGL, refinery feedstocks, additives/oxygenates, other hydrocarbons, and the full oil-products group
5	Biofuels	Solid biofuels, liquid biofuels, biogases
6	Waste	Industrial and municipal waste combusted with heat recovery
7	Electricity	Electricity (not disaggregated by generation process)
8	Heat	Heat sold to third parties (not disaggregated by production process)
9	Nuclear Fuels and Other Fuels n.e.c.	Uranium, plutonium, thorium and other nuclear fuels; residual “other fuels n.e.c.”

Section D also illustrates SIEC’s classification logic through several worked examples cited across these pages: physically similar but separately classified products (natural gas vs. landfill gas; NGL vs. LPG), the use-dependent classification of feedstocks, and the lubricants vs. plastics scope test [IRES, Ch. III, paras 3.9, 3.14, PDF pp. 35–36, 2018].

Source discrepancy noted during ingest: class “Other bituminous coal” (SIEC 0121’s sibling under 012 Bituminous coal) is numbered 0122 in the section D prose but 0129 in Table 3.1 — confirmed against both raw/_pdftotext/ires/03-siec.txt and its -layout.txt companion, so this is an inconsistency in the source PDF itself. Both codes are recorded on Coal, with an editorial note; this digest records the gap at the chapter level as well, per the operational log.

Recommendations and encouragements in this chapter

One provision from Table 1.1 falls in this chapter (see Recommendations and Encouragements for the grading convention):

Para	Recommendation/encouragement
3.1	It is recommended that internationally agreed definitions of energy products and their classification be promoted as a basic tool for energy statistics compilation and dissemination, both nationally and internationally [IRES, Ch. III, Table 1.1, para. 3.1, PDF p. 24, 2018; see also para. 3.1, PDF p. 34, 2018].

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