Parts for hydraulic or pneumatic power engines and motors, and for reaction engines other than turbo-jets

1. Scope and Applicability

This PCR covers cradle-to-factory-gate foreground data production for separately supplied, newly manufactured parts of linear-acting hydraulic or pneumatic power engines and motors, other hydraulic or pneumatic power engines and motors, and reaction engines other than turbo-jets. The composite boundary follows the official CPC 3.0 identity while requiring every data package to declare the actual part family, part number or drawing revision, material, precursor state, manufacturing route, and surface condition.

It covers the reporting facility's machining and any directly controlled heat treatment, aqueous cleaning, surface treatment, assembly, and inspection applied to the declared part. It excludes complete engines and motors; turbo-jets, turbo-propellers, and their parts; unrelated pumps, compressors, valves, and parts; repair, overhaul, and remanufacture; capital equipment; product use, maintenance, and end-of-life; and outbound distribution beyond the factory gate. Upstream production of purchased preforms, chemicals, fuels, electricity, and water is represented by linked upstream datasets rather than duplicated in the foreground inventory.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.general-purpose-machinery.parts-for-the-goods-of-subclasses-43211-and-43219-parts-of-reaction-engines-other-than-76da9d5c
classification_refs	CPC 3.0: 43251, Parts for the goods of subclasses 43211 and 43219; parts of reaction engines other than turbo-jets (exact classification context; currently unmapped)
covered_products	Separately supplied finished parts for linear-acting hydraulic or pneumatic cylinders; separately supplied finished parts for other hydraulic or pneumatic power engines and motors; separately supplied finished parts for reaction engines other than turbo-jets
excluded_products	Complete engines or motors; turbo-jet and turbo-propeller parts; pumps, compressors, valves, or unrelated machinery parts; repaired, overhauled, or remanufactured parts; tooling; production equipment; packaging not integral to the saleable part
representative_product	A conforming, machined and finished load-bearing or pressure-containing engine or motor part supplied as a new replacement or original-equipment component
production_route	Receipt of a declared material-specific forged or cast preform; precision machining; route-dependent heat treatment and aqueous cleaning or surface treatment; final inspection and release
market_state	New, finished, inspected part at the reporting facility factory gate, with preservation coating only when part of the declared saleable state

3. Reference Flow

Field	Value
What	A separately supplied part that meets the declared drawing, material, dimensional, surface-condition, and acceptance requirements for the identified hydraulic or pneumatic engine or motor, or non-turbojet reaction engine
How much	1 kg net mass of conforming finished part
How well	Released by the reporting facility against the declared drawing revision and applicable inspection or test plan; rejected parts and removable packaging are excluded from conforming output mass
How long or cycle	One production lot through factory-gate release; service life and use cycles are outside this cradle-to-gate PCR
reference_flow_link	The reference flow is the measured net mass of conforming finished parts represented by out_finished_part

Field	Value
Reference amount	1 kg
Reference product flow	Finished CPC 43251 engine or motor part
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	part family and intended host equipment; part number and drawing revision; material specification and alloy grade; incoming precursor form; manufacturing and heat-treatment route; surface treatment and preservation state; inspection or test acceptance basis; production site and geography; production period; new-production factory-gate state

When constructing a foreground data package, every item in Required qualifiers shall be declared in dataset metadata, process notes, the reference-flow comment, the product description, or an equivalent data-package field. A dataset that omits any required qualifier has an incomplete reference-flow definition.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	conforming finished part and all mass-normalized inventory	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh conforming finished parts without removable packaging and normalize every inventory amount to 1 kg of that output. Preserve measured lot totals and the normalization calculation.
material_mass_balance	precursor inputs, conforming output, metal scrap, and stock change	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use one dry or as-received mass basis consistently within each declared material stream. Record retained work in progress and inventory change separately before checking the lot mass balance.
electricity_energy	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve the metered electrical-energy quantity. When the source meter reports kWh, convert using 1 kWh = 3.6 MJ and retain the original meter value.
gas_volume	gaseous natural gas	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Report gas at the supplier's declared reference temperature and pressure; disclose those reference conditions and any conversion from meter conditions.

5. System Boundary

rule_id	Applies to	Rule	source_ids
boundary_foreground_operations	reporting-facility manufacturing	Include directly controlled receipt, machining, route-dependent heat treatment, aqueous cleaning or surface treatment, assembly, inspection, rework within the lot, and waste handling through the point each exchange leaves the foreground boundary.	eu-jrc-sf-bref-2024; eu-jrc-stm-bref-2006; us-epa-aerospace-neshap-2015
boundary_upstream_links	purchased inputs	Keep every purchased preform, electricity, fuel, water, and chemical as a visible product input linked to an upstream dataset whose geography, technology, product state, and delivery boundary are disclosed.
boundary_route_conditions	conditional operations	Include natural gas only when directly fired heat treatment occurs, and include process water, sodium hydroxide, cleaning wastewater, and waste alkaline liquor only when the declared aqueous alkaline-cleaning route uses or generates those atomic exchanges.	eu-jrc-sf-bref-2024; eu-jrc-stm-bref-2006
boundary_exclusions	outside-scope life-cycle stages	Exclude capital equipment, tooling production, building infrastructure, employee travel, use, maintenance, repair, overhaul, remanufacture, end-of-life, and distribution beyond the reporting facility gate unless the study goal explicitly expands the boundary and reports that expansion separately.

Boundary Abstraction

Field	Value
declared_starting_condition	Material-specific forged or cast preforms, purchased consumables, and purchased utilities received at the reporting-facility boundary in their declared supply states
starting_condition_role	The starting condition separates upstream preform and utility production from the directly controlled part-manufacturing foreground
product_classification_scope	Separately supplied new parts within the composite CPC 43251 identity; classification context does not make complete engines, turbojet or turboprop parts, or unrelated machinery parts part of this PCR
recursive_input_rule	If an input is itself a finished part within this PCR category, record it once as a visible purchased product input with its own upstream dataset; do not recursively reproduce its manufacturing inventory inside the receiving process
upstream_dataset_requirement	Link every purchased precursor, material, chemical, fuel, electricity, and water input to an upstream dataset matching the declared material or product state, geography, technology, and delivery boundary
disclosure	Disclose part family, drawing revision, alloy and material specification, precursor form, heat-treatment and surface-treatment route, internal rework, outsourced operations, site, production period, and all boundary deviations

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
integrated_part_manufacturing	Integrated part machining, route-dependent finishing, inspection, and release	required	Applies to every foreground data package; route-conditional cards are recorded only when their stated material or operation applies	Foreground manufacturing from received preform to conforming finished part	1 kg conforming finished part at factory gate

Process: Integrated part machining, route-dependent finishing, inspection, and release (integrated_part_manufacturing)

Inputs

Product flows

Low-alloy steel forged preform (in_alloy_steel_forging)

Record the separately purchased forged preform when the declared part is manufactured from low-alloy steel forging stock.

• Selected flow: Low-alloy steel forging
• Flow property / unit: Mass / kg
• Amount rule: measured as-received mass issued to the conforming production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_batch_mass_balance
• Sources:

Aluminium-alloy casting preform (in_aluminium_alloy_casting)

Record the separately purchased casting preform when the declared part is manufactured from an aluminium-alloy casting.

• Selected flow: Aluminium-alloy casting preform
• Flow property / unit: Mass / kg
• Amount rule: measured as-received mass issued to the conforming production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_batch_mass_balance
• Sources:

Nickel-alloy forged preform (in_nickel_alloy_forging)

Record the separately purchased forged preform when the declared reaction-engine part is manufactured from nickel-alloy forging stock.

• Selected flow: Nickel-alloy forging
• Flow property / unit: Mass / kg
• Amount rule: measured as-received mass issued to the conforming production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_batch_mass_balance
• Sources:

Purchased electrical energy (in_electricity)

Record metered electricity used by machining equipment and attributable auxiliaries, heat-treatment or surface-treatment equipment, inspection, and directly controlled waste handling.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: measured electricity attributable to the production lot, including justified allocation of shared meters
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_and_consumable_records
• Sources:

Cutting fluid supplied to machining (in_cutting_fluid)

Record the net fresh cutting-fluid product entering machining after deducting separately documented unopened returns; declare formulation, dilution, and recirculation state.

• Selected flow: Cutting Fluid 576d250f-4f36-4385-939d-0f03b8f95a10
• Flow property / unit: Mass / kg
• Amount rule: measured net fresh cutting-fluid mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_and_consumable_records
• Sources:

Natural gas for directly fired heat treatment (in_natural_gas)

Record this flow only when gaseous natural gas is combusted inside the foreground boundary for heating or heat treatment.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: supplier-meter or calibrated submeter volume attributable to the production lot at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_and_consumable_records
• Sources:

Process water for aqueous cleaning and rinsing (in_process_water)

Record process water only when it crosses the foreground boundary for aqueous cleaning, rinsing, bath make-up, or directly associated cleaning operations.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: measured delivered water mass or volume converted using documented density and meter conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_bath_records
• Sources: eu-jrc-stm-bref-2006

Sodium hydroxide used in alkaline cleaning (in_sodium_hydroxide)

Record sodium hydroxide only when the declared cleaning route uses it; retain the product supply state and concentration rather than assuming pure dry chemical.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: measured mass of sodium-hydroxide product charged to the cleaning bath, with supply concentration disclosed
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_bath_records
• Sources: eu-jrc-stm-bref-2006

Waste flows

Elementary flows

Outputs

Product flows

Conforming finished engine or motor part (out_finished_part)

Record only parts released against the declared drawing and acceptance plan; exclude rejects, work in progress, and removable packaging from the conforming output mass.

• Selected flow: Finished CPC 43251 engine or motor part
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of conforming finished parts released from the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_batch_mass_balance
• Sources: un-cpc-3-0-structure-2025

Waste flows

Low-alloy steel machining scrap (out_low_alloy_steel_scrap)

Record segregated low-alloy steel chips, offcuts, and rejected metal sent out as scrap when the low-alloy steel route applies.

• Selected flow: Low-alloy steel scrap afedcccd-b9f3-4941-8ba4-d3135b8abb67
• Flow property / unit: Mass / kg
• Amount rule: measured dispatched mass plus justified closing stock change attributable to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_dispatch_records
• Sources:

Aluminium machining scrap (out_aluminium_scrap)

Record segregated aluminium chips, offcuts, and rejected metal sent out as scrap when the aluminium route applies.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: measured dispatched mass plus justified closing stock change attributable to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_dispatch_records
• Sources:

Nickel-alloy machining scrap (out_nickel_alloy_scrap)

Record segregated nickel-alloy chips, offcuts, and rejected metal sent out as scrap when the nickel-alloy route applies.

• Selected flow: Nickel-alloy machining scrap
• Flow property / unit: Mass / kg
• Amount rule: measured dispatched mass plus justified closing stock change attributable to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_dispatch_records
• Sources:

Waste cutting oil from machining (out_waste_cutting_oil)

Record waste cutting oil only for an oil-based cutting-fluid route when the material leaves the foreground boundary for recovery or treatment.

• Selected flow: Waste cutting oil 80d926e3-0f76-4a19-9b1e-ffec9deb1216
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred to closed waste storage or an off-site recovery or treatment operator
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_dispatch_records
• Sources: us-epa-aerospace-neshap-2015

Wastewater from aqueous cleaning (out_cleaning_wastewater)

Record cleaning rinse water leaving the process as wastewater separately from concentrated spent bath liquor.

• Selected flow: Wastewater from cleaning f0402393-e82c-47e8-9cd8-a486c97f3e89
• Flow property / unit: Mass / kg
• Amount rule: measured wastewater mass, or measured volume converted with documented density, crossing to treatment or sewer
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_bath_records
• Sources: eu-jrc-stm-bref-2006

Waste alkaline liquor from bath replacement (out_waste_alkaline_liquor)

Record concentrated spent alkaline cleaning solution separately when a bath is partially or fully replaced and leaves the foreground process for treatment.

• Selected flow: Waste Alkaline Liquor ce738ef0-a711-4650-a38b-34479efd7559
• Flow property / unit: Mass / kg
• Amount rule: measured spent-liquor mass removed from the bath and transferred to treatment
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_bath_records
• Sources: eu-jrc-stm-bref-2006

Elementary flows

Direct fossil carbon dioxide from natural-gas combustion (out_fossil_co2)

Record only direct foreground fossil carbon dioxide attributable to natural-gas combustion; do not add upstream electricity or fuel-supply emissions to this elementary-flow row.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: calculate from attributable natural-gas consumption and documented fuel carbon content, oxidation fraction, and carbon-to-carbon-dioxide mass conversion
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_utility_and_consumable_records
• Sources:

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivide_first	mixed part families, alloys, routes, or production lots	Subdivide production by part family, alloy, route, machine cell, or lot and use direct meters, issue records, and time records before allocating shared burdens.
allocation_shared_operations	inseparable shared electricity, fuel, consumables, or waste	When subdivision or direct measurement is not feasible, allocate the shared exchange using the measured causal driver, in descending preference: machine or furnace time adjusted for rated load, treated surface area for surface operations, or conforming product mass. Record the driver and calculation.
allocation_scrap_and_recycling	metal scrap and recovered cutting oil	Report waste outputs at the foreground boundary without avoided-burden credit. If a downstream study models recycling or recovery benefits, keep that modelling outside this foreground process and disclose the method.
allocation_rework	internal rework before factory-gate release	Keep rework inputs and wastes in the originating lot. Do not create additional conforming product output for the same physical part.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_batch_mass_balance	integrated_part_manufacturing	precursor input, conforming output, work in progress, and stock change	weighbridge, scale, material-issue, routing, and release records	material identity; alloy; precursor mass; finished mass; reject mass; opening and closing stock; lot id; timestamp	calibrated weighing and production-record reconciliation	kg	each production lot	complete declared reporting period	all in-scope cells and outsourced steps reconciled to the reporting lot	sum accepted records by material and lot, reconcile stock change, then divide by conforming finished mass	calibration status; lot traceability; release record; reconciliation sign-off
cp_utility_and_consumable_records	integrated_part_manufacturing	electricity, natural gas, cutting fluid, and direct fossil carbon dioxide	submeters, supplier meters, issue and return records, and fuel-quality records	meter start and end; meter unit; allocation driver; fluid issue and return; gas reference conditions; carbon content; oxidation fraction; timestamp	calibrated meter reading and controlled-stores reconciliation	MJ; m3; kg	each lot or shift, aggregated monthly at most	complete declared reporting period	every in-scope cell, furnace, and attributable auxiliary	subtract verified returns and opening/closing stocks, allocate only shared meters by the declared causal driver, then normalize	meter calibration; supplier statement; issue voucher; allocation worksheet
cp_cleaning_bath_records	integrated_part_manufacturing	process water, sodium hydroxide, cleaning wastewater, and waste alkaline liquor	water meter, batch-make-up sheet, bath analysis, discharge meter, and waste-transfer record	water quantity; chemical product mass and concentration; bath volume; bath replacement; wastewater quantity; density; destination; lot id; timestamp	meter reading, controlled chemical issue, bath log, and waste-transfer measurement	kg; m3	each make-up, discharge, or bath change	complete declared reporting period	all in-scope aqueous-cleaning lines	distinguish rinse wastewater from spent bath liquor, reconcile make-up and discharge, then normalize	meter calibration; chemical certificate; bath log; transfer manifest
cp_waste_dispatch_records	integrated_part_manufacturing	segregated metal scrap and waste cutting oil	container weights, stock records, and transfer manifests	waste identity; material grade; gross and tare mass; stock change; contamination; destination; lot allocation; timestamp	calibrated weighing and manifest reconciliation	kg	each container or dispatch	complete declared reporting period	all in-scope waste storage and dispatch points	subtract tare, include documented stock change, allocate only mixed-lot containers by measured contents or traceable lot records	scale calibration; photographs or composition record; signed transfer manifest

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	every inventory row	normalized amount = accepted lot amount / net mass of conforming finished parts released from that lot	accepted exchange amount; conforming finished-part mass	exchange amount per 1 kg conforming finished part
calc_material_reconciliation	each declared alloy route	precursor input + opening work in progress - closing work in progress = conforming finished part + segregated scrap + other recorded material outputs + explained mass difference	precursor, product, scrap, other material outputs, and stock-change masses	lot mass-balance residual and reconciliation status
calc_fossil_co2	direct natural-gas combustion	direct fossil CO2 mass = attributable fuel carbon mass × oxidation fraction × 44/12; derive fuel carbon mass from measured gas and the documented supplier composition or carbon factor	natural-gas quantity; reference conditions; supplier carbon content or factor; oxidation fraction	kg direct fossil carbon dioxide

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity_traceability	reference product and material inputs	Trace every reported lot to the part family, part or drawing number, revision, alloy specification, precursor form, route, and acceptance record.	routing and release records; material certificate; supplier record
dq_temporal_completeness	all foreground exchanges	Cover the full declared reporting period and account for shutdown, start-up, rework, and stock changes that affect in-scope production.	meter completeness check; production calendar; stock reconciliation
dq_measurement_quality	meters and scales	Use calibrated or verified equipment and retain unit, reference conditions, calibration status, and any conversion factors.	calibration certificate; meter specification; conversion worksheet
dq_route_specificity	conditional inventory rows	Mark every conditional row applicable or not applicable for the declared route and retain evidence for that decision.	process routing; work instruction; bath or furnace log
dq_outsourced_operations	outsourced heat or surface treatment	Keep the outsourced product flow visible, document whether its burdens are in a supplier dataset, and prevent double counting with on-site rows.	purchase order; supplier process declaration; boundary reconciliation

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_identity	product category and reference flow	Reject a data package that does not identify the part family, drawing revision, material specification, precursor form, manufacturing route, surface state, site, period, and factory-gate condition.	un-cpc-3-0-structure-2025
validation_reference_mass	normalization	Confirm that every reported amount is normalized to 1 kg net mass of conforming finished part and that removable packaging, rejects, and work in progress are not counted as reference output.
validation_atomic_routes	conditional inventory	Confirm that each applicable material, utility, chemical, waste, and elementary exchange is reported as its own atomic row; no combined utility, material, waste, or emissions category may substitute for a row.
validation_mass_balance	material flows	Reconcile each material-specific precursor input against conforming product, material-specific scrap, other material outputs, and stock change; investigate and disclose an unexplained residual.
validation_energy_and_emissions	natural gas and direct fossil carbon dioxide	When natural gas is reported, require its reference conditions and either a corresponding direct fossil carbon-dioxide calculation or an explicit documented reason the combustion occurs outside the foreground boundary.
validation_cleaning_streams	aqueous cleaning	When alkaline cleaning applies, distinguish process water, sodium-hydroxide product, cleaning wastewater, and spent alkaline liquor and prevent double counting between rinse water and bath replacement.	eu-jrc-stm-bref-2006
validation_evidence_gaps	candidate methodology use	Treat missing exact UUIDs and missing independent range evidence as disclosed candidate-methodology limitations; do not silently substitute proxy flows or invented numeric ranges.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground production data package for a declared finished engine or motor part
downstream_use	Secondary or background cradle-to-gate datasets for machinery, aerospace, hydraulic, pneumatic, and reaction-engine product systems after scope compatibility is confirmed
allowed_use	Part-specific cradle-to-gate modelling where product identity, material, route, geography, technology, time period, and factory-gate state match the consuming model
excluded_use	Direct representation of complete engines or motors, turbo-jet or turbo-propeller parts, repair or overhaul, generic metal products without part qualifiers, use-stage performance, maintenance, end-of-life, or an externally inferred benchmark range
required_metadata	canonical PCR id; part family; part number and drawing revision; host equipment; material and alloy; precursor state; machining, heat-treatment, cleaning and surface-treatment route; site and geography; production period; reference conditions; allocation drivers; outsourced-operation boundary; UUID gaps
required_quality_disclosure	metering and scale coverage; calibration; lot and material traceability; mass-balance residual; conditional-row applicability; rework; stock change; waste destinations; supplier-data representativeness; unresolved UUID and range-evidence needs
update_trigger	Change in part family, design revision, material or precursor state, manufacturing route, heat or surface treatment, site, energy supply, allocation driver, outsourced boundary, or evidence sufficient to resolve UUID or range gaps

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	Official guidance (official_guidance)	United Nations Statistics Division, CPC Version 3.0 Structure, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-05)	Official CPC 43251 product identity and hierarchy only; not quantitative methodology
eu-jrc-sf-bref-2024	Official guidance (official_guidance)	European Commission Joint Research Centre, Best Available Techniques Reference Document for the Smitheries and Foundries Industry, 2024, https://bureau-industrial-transformation.jrc.ec.europa.eu/reference/smitheries-and-foundries-industry (retrieved 2026-09-05)	Process decomposition for forged or cast preforms, heating, machining, finishing, and heat treatment
eu-jrc-stm-bref-2006	Official guidance (official_guidance)	European Commission Joint Research Centre, Surface Treatment of Metals and Plastics BREF, adopted August 2006, https://bureau-industrial-transformation.jrc.ec.europa.eu/sites/default/files/2019-11/stm_bref_0806.pdf (retrieved 2026-09-05)	Conditional aqueous cleaning and surface-treatment boundary; separation of process water, alkaline chemistry, rinse wastewater, and spent alkaline solution
us-epa-aerospace-neshap-2015	Standard (standard)	United States Environmental Protection Agency, Aerospace Manufacturing and Rework Facilities NESHAP final rule, Federal Register 80 FR 76152, 7 December 2015, https://www.govinfo.gov/content/pkg/FR-2015-12-07/pdf/2015-30356.pdf (retrieved 2026-09-05)	Reaction-engine-part relevance of cleaning, coating, chemical milling, blasting, and controlled handling of spent solvent or coating wastes