Parts for the goods of subclass 43320

1. Scope and Applicability

This PCR applies to factory-gate production of separately supplied parts identifiable solely or principally as parts of the goods in CPC 43320: transmission shafts and cranks; bearing housings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers; flywheels and pulleys; clutches and shaft couplings; and articulated link chain. The rule covers machined parts made from purchased metal stock or preforms and includes heat treatment and aqueous cleaning when those operations occur within the reporting facility.

The PCR excludes complete CPC 43320 goods, parts of ball or roller bearings in CPC 43310, general-purpose fasteners not identifiable as parts of CPC 43320 goods, upstream production of purchased metal stock or preforms, removable sales packaging, outbound transport, installation, use, maintenance, and end-of-life. A data package for a non-representative material or manufacturing route shall retain this functional unit and add each route-specific exchange as a separate atomic inventory row.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.general-purpose-machinery.parts-for-the-goods-of-subclass-43320
classification_refs	CPC 3.0: 43332, exact
covered_products	Separately supplied parts identifiable solely or principally as parts of CPC 43320 transmission shafts and cranks, bearing housings and plain shaft bearings, gears and gearing, ball or roller screws, gear boxes and other speed changers, flywheels and pulleys, clutches and shaft couplings, or articulated link chain
excluded_products	Complete CPC 43320 goods; parts of CPC 43310 ball or roller bearings; general-purpose fasteners; non-articulated chain parts; packaged sets whose primary identity is a complete gearbox, clutch, coupling, pulley, or other assembled CPC 43320 good
representative_product	An inspection-released, separately supplied alloy-steel component machined for incorporation into a CPC 43320 transmission or driving-element good
production_route	Purchased alloy-steel bar or documented preform; machining and dimensional finishing; conditional heat treatment; conditional aqueous alkaline cleaning; final inspection and release
market_state	Finished, accepted, unpackaged part at the manufacturing-facility gate; material grade, geometry, heat-treatment state, surface condition, and tolerance class declared

3. Reference Flow

Field	Value
What	A finished and accepted separately supplied part for a CPC 43320 transmission or driving-element good
How much	1 kg net mass of accepted finished part
How well	Conforms to the declared drawing or part number, material grade, heat-treatment specification, dimensional and tolerance requirements, surface condition, and acceptance criteria
How long or cycle	One factory-gate lot release; no service life or use cycle is included
reference_flow_link	One reference amount equals 1 kg of accepted net finished-part mass leaving final inspection

Field	Value
Reference amount	1 kg
Reference product flow	Parts for the goods of subclass 43320
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 drawing or part number; intended CPC 43320 parent good; material and alloy grade; purchased stock or preform state; manufacturing route; heat-treatment route and state; surface-treatment route and condition; dimensional and tolerance class; accepted-lot status; net-mass basis; geography; technology; reporting period; factory-gate condition

When constructing a foreground data package, every required qualifier shall be declared in dataset metadata, process notes, the reference-flow comment, the product description, or an equivalent data-package field. Missing qualifiers make the reference flow incomplete.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_net_mass	accepted reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh or calculate the net mass of accepted finished parts after removal of chips, free liquid, temporary fixtures, and removable sales packaging; rejected parts are not reference product.
material_and_waste_mass	alloy-steel input, machining chips, waste metalworking fluid, sodium hydroxide, cleaning wastewater, and fossil carbon dioxide	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Report mass at the point the exchange crosses its process boundary; document moisture, adhering-fluid, solution-concentration, and solids conventions where relevant.
water_mass_conversion	process-water inputs	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	If a water meter reports volume, convert with the measured or documented density at the stated reference conditions and retain the meter total and conversion basis.
electricity_energy_conversion	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve purchased electricity as delivered electrical energy; convert kWh to MJ using 1 kWh = 3.6 MJ and disclose grid, voltage, losses, and meter allocation.
natural_gas_volume	gaseous natural gas	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Report metered gas volume at declared reference conditions; if an energy bill is the primary record, retain the supplier conversion factor and do not infer a generic volume.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased metal bar, rod, or documented near-net preform accepted at the reporting facility, with material grade, mass, supplier, geography, and delivery state recorded
starting_condition_role	Upstream material-production cut-in point for the foreground manufacturing data package
product_classification_scope	Separately supplied parts for CPC 43320 goods; the classification reference informs scope but does not replace part-family, material, and route qualifiers
recursive_input_rule	If a purchased input is itself a separately supplied part within this PCR category, record it once as an atomic product input with its own upstream dataset and do not recursively reconstruct that supplier's foreground operations
upstream_dataset_requirement	Use supplier-specific or otherwise representative upstream datasets for every purchased metal stock, preform, electricity supply, fuel, water, and chemical input; disclose geography, technology, and data age
disclosure	Declare which shaping occurred upstream, the received stock or preform state, included on-site processes, outsourced operations, heat and surface treatments, rejected-part treatment, waste destinations, metering allocations, and gate condition

rule_id	Applies to	Rule	source_ids
sb_gate_to_gate	foreground manufacturing boundary	Include machining and dimensional finishing, applicable heat treatment and aqueous cleaning, final inspection, on-site energy and water use, direct fossil carbon dioxide, and wastes generated before the accepted unpackaged part crosses the facility gate.	nist-ir-7913-2013; ec-jrc-sf-bref-2024; ec-jrc-stm-bref-2006
sb_route_specific	process applicability	Include a conditional process only when the foreground route performs it; identify every additional route-specific material, energy, waste, and elementary exchange as its own atomic row rather than substituting a combined utility, chemical, waste, or emission label.	nist-ir-7913-2013; ec-jrc-fmp-bref-2022
sb_exclusions	background and downstream stages	Exclude upstream production already represented by purchased-input datasets, capital equipment unless the study explicitly requires it, removable sales packaging, outbound transport, installation, use, maintenance, and end-of-life; disclose any study-specific expansion.
sb_outsourced_operations	outsourced shaping, heat treatment, or surface treatment	Record an outsourced operation as a purchased processing input or linked upstream process dataset with transported mass and route disclosed; do not claim it as zero burden.	nist-ir-7913-2013

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
machining_and_dimensional_finishing	Machining and dimensional finishing	required	Always required for the representative route; a demonstrably near-net part may report zero machining only with drawing and acceptance evidence	Foreground material removal and dimensional finishing	Mass of accepted finished part attributable to the reporting lot
heat_treatment	Heat treatment	conditional	Include when thermal treatment is performed on-site for the declared alloy and required mechanical properties	Foreground structure-change process	Mass of treated part entering the accepted lot
aqueous_alkaline_cleaning	Aqueous alkaline cleaning	conditional	Include when sodium-hydroxide-based aqueous cleaning or rinsing is performed on-site	Foreground surface preparation	Mass of cleaned part entering final inspection
final_inspection_and_release	Final inspection and release	required	Always required	Foreground acceptance and reference-product release	Net mass of accepted unpackaged part

Process: Machining and dimensional finishing (machining_and_dimensional_finishing)

Inputs

Product flows

Alloy-steel bar machining stock (alloy_steel_bar_input)

Purchased alloy-steel bar crosses the foreground boundary as the representative machining stock. Declare alloy grade, bar dimensions, supplier, geography, received mass, and whether any upstream forging or other shaping is embodied in the input.

• Selected flow: Bars and rods of alloy steel, not further worked than forged, hot-rolled, hot-drawn or extruded (except bars or rods of high-speed steel or silico-manganese steel) c11c7e9a-d020-4b89-a50c-4a82c0f76943
• Flow property / unit: Mass / kg
• Amount rule: measured received mass charged to the reporting lot, adjusted for documented opening and closing stock
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_alloy_steel_bar_input
• Sources:

Purchased electricity for machining (machining_electricity)

Purchased electricity powers machine tools, pumps, local extraction, and directly attributable machining auxiliaries.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or a documented allocation from a common meter using machine operating time and rated or measured load
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_machining_electricity
• Sources: nist-ir-7913-2013

Process water for machining (machining_process_water)

Process water is recorded when it is supplied across the machining boundary for coolant make-up or part rinsing; closed-loop recirculation inside the process is not counted repeatedly.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: measured make-up water charged to machining during the reporting period
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_machining_process_water
• Sources:

Water-miscible metalworking-fluid concentrate (metalworking_fluid_concentrate)

Record one commercially supplied water-miscible metalworking-fluid concentrate input. Product formulation, concentration, supplier, and inventory change remain mandatory foreground qualifiers; no exact public TianGong flow UUID is confirmed.

• Selected flow: Water-miscible metalworking-fluid concentrate
• Flow property / unit: Mass / kg
• Amount rule: purchased concentrate plus opening inventory minus closing inventory and documented transfers, allocated to the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_metalworking_fluid_concentrate
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Low-alloy steel machining chips (low_alloy_steel_machining_chips)

Collect low-alloy steel chips separately at the machining process boundary. Declare adhering fluid, mixed-alloy contamination, weighing condition, and recovery destination.

• Selected flow: Steel scrap, low-alloyed (machining chips), at plant 826431d5-0492-4345-9051-8342d1f6c4d5
• Flow property / unit: Mass / kg
• Amount rule: measured chip mass removed from the reporting lot, on the declared adhering-fluid basis
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_low_alloy_steel_machining_chips
• Sources:

Waste metalworking fluid (waste_metalworking_fluid)

Spent metalworking fluid leaving the machining system for off-site recovery, treatment, or disposal is recorded once at transfer.

• Selected flow: Waste metalworking fluid 2468f4c0-46fa-4a8b-8075-686cf7391b00
• Flow property / unit: Mass / kg
• Amount rule: measured waste-transfer mass allocated to the reporting lot using documented production or fluid-use records
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_metalworking_fluid
• Sources:

Elementary flows

Process: Heat treatment (heat_treatment)

Inputs

Product flows

Gaseous natural gas for the heat-treatment furnace (heat_treatment_natural_gas)

Natural gas is included only when a gas-fired furnace serves the declared on-site heat-treatment route.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: calibrated meter or supplier-bill volume attributable to heat-treatment cycles for the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_heat_treatment_natural_gas
• Sources: ec-jrc-sf-bref-2024

Purchased electricity for heat treatment (heat_treatment_electricity)

Electricity powers furnace controls, fans, pumps, material handling, and other directly attributable auxiliaries; electric furnace heating is included here when used.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered or documented allocated electricity for heat-treatment cycles serving the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_heat_treatment_electricity
• Sources: ec-jrc-sf-bref-2024; ec-jrc-fmp-bref-2022

Process water for quench-system make-up (quench_process_water)

Process water is included only for a water-based quench or quench-system make-up. Recirculated water is not counted repeatedly.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: measured make-up water supplied to the heat-treatment quench system
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_quench_process_water
• Sources: ec-jrc-fmp-bref-2022

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Direct fossil carbon dioxide from furnace combustion (heat_treatment_fossil_co2)

Report only direct fossil carbon dioxide from natural-gas combustion inside the foreground heat-treatment boundary. Upstream fuel and purchased-electricity emissions remain in their background datasets.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: calculate from measured foreground natural-gas consumption using the documented site fuel-carbon and oxidation method, or use compliant direct stack measurement
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Fuel inventory (fuel_inventory)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_heat_treatment_fossil_co2
• Sources:

Process: Aqueous alkaline cleaning (aqueous_alkaline_cleaning)

Inputs

Product flows

Sodium hydroxide for the cleaning bath (cleaning_sodium_hydroxide)

Sodium hydroxide is recorded when it is purchased for the declared aqueous alkaline cleaning route. Report active-product mass and solution concentration separately.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: purchased sodium-hydroxide product plus opening inventory minus closing inventory and documented transfers
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_sodium_hydroxide
• Sources: ec-jrc-stm-bref-2006

Process water for aqueous cleaning (cleaning_process_water)

Record make-up water crossing into cleaning and rinsing; internal recirculation is not counted repeatedly.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: measured make-up water supplied to cleaning and rinse stages
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_process_water
• Sources: ec-jrc-stm-bref-2006

Purchased electricity for aqueous cleaning (cleaning_electricity)

Electricity powers bath heating, pumps, extraction, and directly attributable material handling.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered or documented allocated electricity for cleaning the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_electricity
• Sources: ec-jrc-stm-bref-2006

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Wastewater from aqueous cleaning (cleaning_wastewater)

Record cleaning wastewater when it leaves the cleaning system for on-site or off-site treatment. Declare pH, dissolved and suspended metal content, solids basis, collection point, and treatment destination.

• Selected flow: Wastewater from cleaning f0402393-e82c-47e8-9cd8-a486c97f3e89
• Flow property / unit: Mass / kg
• Amount rule: measured wastewater mass, or volume converted with documented density, leaving the cleaning system
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_wastewater
• Sources: ec-jrc-stm-bref-2006

Elementary flows

Process: Final inspection and release (final_inspection_and_release)

Inputs

Product flows

Purchased electricity for inspection (inspection_electricity)

Electricity powers dimensional metrology, non-destructive testing, cleaning retained within inspection, and directly attributable handling.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or documented equipment-runtime allocation for inspection and release of the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_inspection_electricity
• Sources: nist-ir-7913-2013

Waste flows

Elementary flows

Outputs

Product flows

Accepted finished reference product (reference_product)

The reference product is the net mass of accepted, unpackaged parts released from final inspection. No exact public TianGong product-flow UUID is confirmed for the separately supplied CPC 43332 part boundary.

• Selected flow: Parts for the goods of subclass 43320
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of accepted finished parts released from the reporting lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg accepted finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_reference_product
• Sources: un-cpc-3-0-2025

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
alloc_subdivision_first	shared machines, meters, and treatment systems	Avoid allocation by subdividing processes, using dedicated meters, or assigning measured machine time and load to the reporting lot. Document the allocation key and unallocated remainder.
alloc_rejects_and_rework	rejected parts and rework	Assign all burdens incurred before rejection to the production lot; assign additional rework burdens to accepted product and report rejected mass separately as its actual waste or recovery flow.
alloc_scrap_no_avoided_burden	low-alloy steel machining chips	Record gross chip mass and its actual destination at the foreground boundary. Do not subtract an avoided primary-steel credit inside this foreground process; any recycling substitution belongs to the declared downstream modelling method.
alloc_unavoidable_multioutput	other saleable co-products	If subdivision cannot resolve a material co-product, apply a documented causal physical relation; use mass only when it represents causality, report the choice, and test sensitivity against an alternative defensible relation.

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_alloy_steel_bar_input	machining_and_dimensional_finishing	alloy-steel bar input	receiving, issue, and inventory records	material grade; supplier; received and issued mass; opening and closing stock; lot link	reconciled weighbridge, scale, ERP, and stores records	kg	each receipt and issue	complete reporting period	all stock charged to included lots	receipts + opening stock - closing stock - documented transfers	scale calibration; supplier certificate; inventory reconciliation
cp_machining_electricity	machining_and_dimensional_finishing	electricity	meter and machine-runtime records	meter start/end; kWh; machine id; runtime; measured or rated load; lot link	dedicated submeter preferred; otherwise documented runtime-load allocation	kWh and MJ	each shift or batch	complete reporting period	all included machining equipment and auxiliaries	convert kWh to MJ and divide attributable total by accepted reference-product mass	meter calibration; allocation reconciliation; operating log
cp_machining_process_water	machining_and_dimensional_finishing	process-water make-up	water meter and tank records	meter start/end; tank additions; density basis; lot link	dedicated make-up meter or reconciled tank additions	kg or m3	each batch or daily	complete reporting period	machining coolant and rinse systems	exclude recirculation; convert volume to mass where needed; normalize to accepted mass	meter calibration; tank log; leak and purge record
cp_metalworking_fluid_concentrate	machining_and_dimensional_finishing	concentrate input	purchase, issue, and inventory records	product name; formulation; concentration; mass; opening and closing inventory; transfers	reconciled purchase and stores records	kg	each issue	complete reporting period	all included machining fluid systems	purchases + opening inventory - closing inventory - transfers, allocated to included lots	supplier document; scale record; inventory reconciliation
cp_low_alloy_steel_machining_chips	machining_and_dimensional_finishing	machining-chip output	chip-container weighing and dispatch records	alloy family; gross and tare mass; adhering-fluid condition; contamination; destination; lot link	calibrated container scale and dispatch reconciliation	kg	each container	complete reporting period	chips generated by included machining	net container mass allocated to included lots; keep adhering-fluid basis consistent	scale calibration; photos or inspection; waste transfer note
cp_waste_metalworking_fluid	machining_and_dimensional_finishing	waste fluid	tank level, mass, and waste-transfer records	fluid identity; mass or volume; density; collection date; destination; lot allocation	calibrated tank or transfer weighing with inventory reconciliation	kg	each transfer	complete reporting period	spent fluid leaving included machining systems	opening waste stock + generation - closing stock - internal reuse, normalized to accepted mass	transfer manifest; density record; tank calibration
cp_heat_treatment_natural_gas	heat_treatment	furnace natural gas	gas meter, bill, and cycle records	meter start/end; reference conditions; cycle id; furnace id; loaded mass; lot link	dedicated calibrated meter preferred; otherwise documented cycle allocation	m3	each cycle or daily	complete included heat-treatment period	included furnaces and directly linked burners	allocate measured volume by metered branch or documented cycle consumption; normalize to treated accepted mass	meter calibration; supplier bill reconciliation; cycle log
cp_heat_treatment_electricity	heat_treatment	electricity	submeter and cycle records	kWh; furnace id; auxiliary loads; cycle id; loaded mass; lot link	dedicated submeter or cycle-time/load allocation	kWh and MJ	each cycle	complete included heat-treatment period	included furnaces and auxiliaries	convert kWh to MJ and normalize attributable total to accepted mass	meter calibration; cycle log; allocation reconciliation
cp_quench_process_water	heat_treatment	quench make-up water	make-up meter and tank records	make-up amount; purge; leak; density basis; cycle and lot link	calibrated make-up meter or tank balance	kg or m3	each cycle or daily	complete included quench period	included water-based quench system	count make-up only; convert volume to mass; normalize to accepted mass	meter calibration; tank balance; maintenance log
cp_heat_treatment_fossil_co2	heat_treatment	direct fossil carbon dioxide	fuel analysis, gas meter, and emission-calculation or stack records	natural-gas volume; reference conditions; carbon content or supplier factor; oxidation basis; measured CO2 where available; cycle link	documented fuel-carbon calculation or compliant direct measurement	kg	each cycle or reporting interval	complete included combustion period	on-site furnace combustion only	calculate and normalize direct fossil CO2; exclude upstream fuel and purchased-electricity emissions	meter calibration; factor provenance; calculation check or instrument QA
cp_cleaning_sodium_hydroxide	aqueous_alkaline_cleaning	sodium hydroxide	purchase, bath-make-up, and inventory records	product mass; concentration; opening/closing inventory; bath additions; transfers; lot link	reconciled purchase and bath records	kg	each addition	complete included cleaning period	included alkaline cleaning baths	product purchases + opening inventory - closing inventory - transfers; report product and active mass distinctly	supplier specification; scale calibration; bath analysis
cp_cleaning_process_water	aqueous_alkaline_cleaning	cleaning and rinse make-up water	make-up meter and bath records	meter start/end; bath additions; rinse make-up; reuse; density basis; lot link	calibrated make-up meter or bath balance	kg or m3	each shift or daily	complete included cleaning period	included baths and rinses	count make-up crossing the process boundary once; convert volume to mass; normalize to accepted mass	meter calibration; bath log; reuse record
cp_cleaning_electricity	aqueous_alkaline_cleaning	electricity	submeter and operating records	kWh; bath heater; pump and extraction loads; operating time; lot link	dedicated submeter or documented runtime-load allocation	kWh and MJ	each shift	complete included cleaning period	included cleaning equipment and auxiliaries	convert kWh to MJ and normalize attributable total to accepted mass	meter calibration; operating log; allocation reconciliation
cp_cleaning_wastewater	aqueous_alkaline_cleaning	cleaning wastewater	discharge or transfer meter and analysis records	mass or volume; density; pH; dissolved and suspended metals; solids; destination; lot link	calibrated meter or tank transfer with representative sampling	kg or m3	each discharge or transfer	complete included cleaning period	wastewater leaving included cleaning system	subtract documented internal reuse; convert volume to mass; normalize to accepted mass	meter calibration; sampling record; laboratory result; transfer note
cp_inspection_electricity	final_inspection_and_release	inspection electricity	submeter and equipment-runtime records	kWh; equipment id; runtime; load; lot link	dedicated submeter or documented runtime-load allocation	kWh and MJ	each lot or shift	complete reporting period	included metrology and test equipment	convert kWh to MJ and normalize attributable total to accepted mass	meter calibration; equipment log; allocation reconciliation
cp_reference_product	final_inspection_and_release	accepted finished part	accepted-lot and weighing records	part number; accepted count; individual or batch net mass; rejected count/mass; release status	calibrated scale linked to final acceptance record	kg	each lot	complete reporting period	all accepted unpackaged parts in the dataset	sum accepted net mass only; reconcile against input, chips, waste, rejects, and inventory change	scale calibration; signed release record; mass-balance reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	every inventory row	normalized amount = attributable exchange quantity / accepted net reference-product mass	collected exchange quantity; accepted reference-product mass	exchange per 1 kg accepted finished part
calc_electricity_mj	electricity rows	MJ = metered kWh × 3.6	metered or allocated kWh	delivered electrical energy in MJ
calc_water_mass	water and wastewater rows measured by volume	mass = measured volume × documented density at stated conditions	volume; density; reference conditions	kg water or wastewater
calc_fossil_co2	heat_treatment_fossil_co2	apply the documented site fuel-carbon and oxidation method to measured natural-gas consumption; keep factor provenance and reference conditions, or use quality-assured direct measurement	foreground gas quantity; carbon or emission factor; oxidation basis, or measured stack result	kg direct fossil carbon dioxide
calc_material_balance	reporting lot	reconcile alloy-steel input with accepted product, machining chips, rejected parts, other declared wastes, and stock change; investigate and disclose the residual	input mass; output and waste mass; opening/closing work in progress	mass-balance residual and completeness finding

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Part family, intended CPC 43320 parent good, drawing or part number, material grade, heat-treatment state, surface condition, tolerance class, and accepted-lot status shall be unambiguous.	drawing; material certificate; route card; inspection release
dq_measurement	measured exchanges	Use calibrated instruments with units, reference conditions, calibration status, and data-gap treatment retained.	calibration certificates; meter logs; scale checks
dq_temporal	foreground data	Cover a representative continuous period or enough complete lots to capture normal operating, start-up, shutdown, purge, and waste-transfer events; report exclusions.	production calendar; lot register; operating logs
dq_completeness	inventory	Reconcile purchased inputs, meters, waste transfers, and accepted output; identify all additional route-specific atomic exchanges and explain material or energy gaps.	mass and energy reconciliations; invoices; transfer manifests
dq_allocation	shared utilities and processes	Retain the measured or calculated allocation key, denominator, unallocated remainder, and sensitivity where allocation is material.	submeter data; runtime records; allocation workbook
dq_background_links	purchased inputs and outsourced operations	Background datasets shall match declared material, geography, technology, product state, and time period as closely as available; disclose proxies.	supplier dataset; dataset metadata; proxy justification

9. Validation Rules

rule_id	Applies to	Rule	source_ids
val_identity	reference product	Fail if the output is a complete CPC 43320 good, a CPC 43310 bearing part, a general-purpose fastener, or another product not identifiable as a separately supplied part for a CPC 43320 good.	un-cpc-3-0-2025
val_reference_amount	reference flow	Fail if the declared reference amount is not 1 kg accepted net finished-part mass or if removable packaging, rejects, free liquid, or temporary fixtures are included.
val_route_coverage	process map	Fail if an on-site machining, heat-treatment, aqueous-cleaning, or inspection operation is performed but omitted, or if an outsourced operation is represented as zero burden.	nist-ir-7913-2013; ec-jrc-sf-bref-2024; ec-jrc-stm-bref-2006
val_atomic_inventory	inventory rows	Fail if one row combines multiple materials, energy carriers, chemicals, wastes, or elementary emissions, or instructs a future route choice instead of naming one exchange.
val_uuid_and_localization	flow identities	Fail if a UUID-bearing flow differs from its verified public identity, property, or unit group; flag unresolved reference-product and metalworking-fluid UUIDs for review; require the official TianGong Chinese baseName in the Chinese rendering for every adopted UUID.
val_mass_balance	material inventory	Fail if input, accepted product, machining chips, rejects, other wastes, and stock change are not reconciled or the unexplained residual lacks investigation and disclosure.
val_range_evidence	amount ranges	Fail any externally inferred range unless at least two independent original sources support compatible system boundary, functional unit, and product state; an absent range remains an explicit foreground evidence need and shall not be replaced by a single case value.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground factory-gate production dataset for a declared separately supplied part of a CPC 43320 good
downstream_use	secondary_dataset; background_dataset
allowed_use	Product carbon-footprint, life-cycle assessment, supply-chain, and mechanical-equipment models whose part identity, material, route, geography, technology, and gate condition match the declared qualifiers
excluded_use	Complete gearboxes, shafts, clutches, couplings, pulleys, bearing assemblies, or articulated chains; bearing parts of CPC 43310; unidentified generic metal parts; use-phase performance; end-of-life without an explicit downstream model
required_metadata	PCR id and version; part family; intended parent good; drawing or part number; material and alloy grade; received stock or preform state; route; heat and surface treatment; accepted-lot status; geography; technology; reporting period; facility gate; allocation; background dataset links; unresolved UUID disclosures
required_quality_disclosure	Instrument coverage and calibration; temporal and production coverage; mass-balance residual; meter allocation; rejects and rework; fluid and wastewater basis; outsourced operations; background proxies; data gaps; uncertainty; absence of two-source empirical ranges
update_trigger	Change in part family, material grade, purchased stock or preform state, machining technology, heat-treatment route, cleaning route, facility, electricity or fuel supply, allocation, waste destination, reference-product identity, or any newly confirmed exact TianGong UUID or compatible two-source range evidence

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-2025	official_guidance	United Nations Statistics Division, CPC Version 3.0 structure and explanatory notes, updated 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 43332 identity and its relationship to the goods of subclass 43320
un-cpc-1-1-zh-2004	official_guidance	United Nations Statistics Division, Central Product Classification Version 1.1, Chinese edition. https://unstats.un.org/unsd/publication/SeriesM/M_77ver1_1c.pdf (retrieved 2026-09-05)	Established professional Chinese rendering of CPC 43332
nist-ir-7913-2013	literature	National Institute of Standards and Technology, NISTIR 7913, Review on Sustainability Characterization for Manufacturing Processes, 2013. https://nvlpubs.nist.gov/nistpubs/ir/2013/NIST.IR.7913.pdf (retrieved 2026-09-05)	Unit-process decomposition, including machining, heat treatment, finishing, assembly, inspection, inputs, energy, and scrap
ec-jrc-sf-bref-2024	official_guidance	European Commission Joint Research Centre, Best Available Techniques Reference Document for the Smitheries and Foundries Industry, 2024, DOI 10.2760/4805267. https://bureau-industrial-transformation.jrc.ec.europa.eu/reference/smitheries-and-foundries-industry (retrieved 2026-09-05)	Machining, cooling and finishing, heat-treatment, forging, and foundry process context for metal parts
ec-jrc-stm-bref-2006	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/reference/surface-treatment-metals-and-plastics (retrieved 2026-09-05)	Water-based electrolytic and chemical surface-treatment boundary and aqueous-cleaning applicability
ec-jrc-fmp-bref-2022	official_guidance	European Commission Joint Research Centre, Ferrous Metals Processing Industry BREF, adopted December 2022. https://bureau-industrial-transformation.jrc.ec.europa.eu/reference/ferrous-metals-processing-industry (retrieved 2026-09-05)	Heat treatment, cleaning, pickling, finishing, and route-conditioned ferrous-metal processing sequence