Parts for industrial gas generators, air-conditioning, refrigeration, heat pumps, and temperature-treatment machinery

1. Scope and Applicability

This PCR applies to finished parts made specifically for producer-gas or water-gas generators, acetylene and similar water-process gas generators, air-conditioning machines, refrigerating or freezing equipment, heat pumps, and machinery that treats materials through a change of temperature. It covers a declared representative part from receipt of purchased materials and components through material preparation, forming, machining, joining, cleaning, finishing, assembly, testing, and factory-gate release.

The category is parts-only. Complete machines, general-purpose fasteners or raw tubes sold independently of a machinery-part identity, household refrigerating appliances, compressors classified as complete machines, customer-site installation, use, maintenance, and end-of-life are excluded. A foreground data package shall identify the part family, drawing or specification, equipment application, bill of materials, manufacturing route, refrigerant state, and factory-gate product condition. The official CPC 3.0 description is the classification-identity basis (un-cpc-3-0-structure-2025); it does not supply inventory amounts or ranges.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.general-purpose-machinery.parts-of-producer-gas-or-water-gas-generators-parts-of-acetylene-gas-generators-and-sim-dfae5146
classification_refs	CPC 3.0: 43941 (exact classification context; mapping acceptance remains a separate governance decision)
covered_products	Finished, separately supplied parts designed for the listed industrial gas-generation, air-conditioning, refrigeration, heat-pump, or temperature-treatment machinery
excluded_products	Complete equipment; household refrigerating appliances; generic materials and standard fasteners without a declared machinery-part identity; customer-site installation; use; maintenance; end-of-life
representative_product	One declared, quality-conforming finished machinery part at the manufacturer's factory gate
production_route	Purchased material and component receipt; route-specific cutting, forming, machining, joining, cleaning or finishing; assembly; inspection and release
market_state	Finished part, dry or with a declared retained refrigerant charge, packaged or unpackaged as specified at the factory gate

3. Reference Flow

Field	Value
What	Provide a quality-conforming part ready for integration into or replacement within the declared covered machinery
How much	1 kg of finished part
How well	Meets the declared drawing, material grade, dimensional tolerance, pressure or leak-test requirement, surface condition, cleanliness, and acceptance specification
How long or cycle	One factory-gate delivery of the part; service life is outside this cradle-to-gate reference
reference_flow_link	The measured mass of conforming finished_machinery_part output after inspection, excluding separately reported transport packaging unless the declared sale specification makes it integral

Field	Value
Reference amount	1 kg
Reference product flow	Parts of producer gas or water gas generators, parts of acetylene gas generators and similar water process gas generators, parts for the goods of subclass 43912, parts of refrigerating and freezing equipment and heat pumps, parts of machinery for the treatment of materials by a process involving a change of temperature cdee7105-36d3-4fd3-8418-f9498bf159bc
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 function; applicable equipment family; drawing or specification identifier; principal materials and grades; finished-part mass; manufacturing route; joining and surface-treatment route; refrigerant type and retained charge or dry state; test method; geography; reference period; packaging inclusion

When constructing a foreground data package, the items listed in Required qualifiers must be declared in dataset metadata, process notes, reference flow comment, product description, or an equivalent data package field.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product and mass-based rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh conforming finished output and normalize all reported exchanges to exactly 1 kg of that output; retain unrounded batch totals and the normalization factor.
energy_measurement	electricity rows	Net calorific value	MJ	Retain the original meter unit and time interval, convert to MJ with an explicitly documented exact unit conversion, and do not mix purchased electricity with fuel energy.
gas_volume_conditions	natural gas	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	State the metering temperature, pressure, dry or wet basis, and any conversion to supplier or site reference conditions.
water_mass_conversion	process water and wastewater	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	When a volume meter is used, document density and measurement conditions before converting to mass; do not assume water input equals wastewater output.
refrigerant_mass_balance	R404A input, retained charge, recovery, and release	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Close a batch balance for purchased or recovered refrigerant, retained charge, recovered return, and measured or calculated release; declare cylinders and circuits included.

5. System Boundary

The foreground boundary begins when purchased materials, components, process chemicals, fuels, water, and electricity cross the manufacturing-site gate and ends when the conforming part is released at the factory gate. Supplier production is represented by upstream datasets. Include on-site material preparation, forming, machining, joining, cleaning, finishing, assembly, inspection, testing, rework, direct emissions, and generated wastes when they occur.

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased, specification-matched plate, sheet, tubing, components, chemicals, utilities, and any refrigerant received at the manufacturing site
starting_condition_role	Auditable foreground starting point for part manufacture
product_classification_scope	Parts made specifically for the covered machinery; classification identity follows un-cpc-3-0-structure-2025
recursive_input_rule	Record a purchased finished part in the same category once as an external product input with its upstream dataset and mass; do not recursively reproduce its manufacture inside this foreground process
upstream_dataset_requirement	Prefer supplier-specific data; otherwise select geographically, technologically, materially, and temporally representative upstream datasets and disclose substitutions
disclosure	Declare site, period, part family, BOM, material grades, route steps, rejects, rework, refrigerant state, test boundary, packaging inclusion, excluded capital goods, and omitted transport

rule_id	Applies to	Rule	source_ids
boundary_parts_only	product scope	Include only factory-gate manufacture of a declared finished part for the enumerated equipment families; complete equipment remains outside this PCR.	un-cpc-3-0-structure-2025
boundary_route_steps	foreground operations	Include every on-site operation that physically or chemically changes, joins, cleans, finishes, tests, or releases the part, together with direct wastes and emissions.
boundary_upstream_inputs	purchased inputs	Represent purchased materials, components, utilities, chemicals, fuels, and refrigerants with upstream datasets and avoid duplicating upstream processes in the foreground inventory.
boundary_capital_transport	exclusions	Exclude capital equipment and employee travel by default; include transport only when the study goal brings it into scope and disclose that extension.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
material_preparation	Material preparation, forming, and machining	required	Apply to all routes; individual material cards apply only when the named material is in the BOM	Transform purchased metal forms into part geometry	Exchanges per 1 kg conforming finished part
joining_cleaning_finishing	Joining, cleaning, and finishing	conditional	Include when welding, brazing, process heat, aqueous cleaning, or finishing occurs	Join and prepare the part surface	Route-specific exchanges per 1 kg conforming finished part
assembly_testing_release	Assembly, testing, inspection, and factory-gate release	required	Apply to the declared part; R404A cards apply only when R404A crosses the boundary	Final assembly, test, acceptance, and output	1 kg conforming finished part

Process: Material preparation, forming, and machining (material_preparation)

Inputs

Product flows

Steel plate feedstock (steel_plate_materials)

Record when steel plate is cut, formed, or machined. The BOM and receiving records establish grade, dimensions, coating, supplier, and mass.

• Selected flow: Steel plate materials 818105f5-d33e-4dd8-bbc0-fc1ad29d9173
• Flow property / unit: Mass / kg
• Amount rule: measured issued mass minus documented unopened returns
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Stainless-steel sheet feedstock (stainless_steel_sheet)

Record one chemically specified stainless-steel sheet exchange when present in the BOM. Keep the UUID unresolved until a mutually consistent exact state-100 identity is available.

• Selected flow: Stainless steel sheet
• Flow property / unit: Mass / kg
• Amount rule: measured issued mass minus documented unopened returns
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Primary aluminium-alloy sheet feedstock (primary_aluminium_alloy_sheet)

Record only when primary aluminium-alloy sheet is specified; do not use this row for secondary aluminium or foil.

• Selected flow: Primary aluminum alloy sheet 2a9549cc-dc9e-43a7-9379-7a0c0a0e4832
• Flow property / unit: Mass / kg
• Amount rule: measured issued mass minus documented unopened returns
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Copper tubing feedstock (copper_tubing)

Record when the part contains formed, expanded, brazed, or otherwise fabricated copper tube.

• Selected flow: Copper tubing 0d80f4b8-8f26-4eee-8b81-df499c4c9dff
• Flow property / unit: Mass / kg
• Amount rule: measured issued mass minus documented unopened returns
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Cutting fluid (cutting_fluid)

Record fresh cutting-fluid make-up for machining; state formulation, dilution basis, and internal recirculation.

• Selected flow: Cutting Fluid 576d250f-4f36-4385-939d-0f03b8f95a10
• Flow property / unit: Mass / kg
• Amount rule: measured fresh make-up mass charged to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Machining and forming electricity (electricity_machining)

Record purchased electricity for cutting, forming, machining, extraction, and directly attributable auxiliaries.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or documented causal allocation from a shared meter
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_metering

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Scrap steel (steel_scrap)

Record separately collected ferrous scrap from the steel-plate route; exclude stainless scrap.

• Selected flow: Scrap steel c3fc5605-baa3-4b25-9934-ecf7fcbc72da
• Flow property / unit: Mass / kg
• Amount rule: measured mass leaving the process as steel scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Stainless-steel scrap (stainless_steel_scrap)

Record newly generated stainless-steel offcuts and chips separately from other steel. Do not use external-supply scrap identities for this output.

• Selected flow: Stainless steel scrap
• Flow property / unit: Mass / kg
• Amount rule: measured mass leaving as newly generated stainless-steel scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Aluminium scrap (aluminium_scrap)

Record separately collected aluminium offcuts and chips from the declared route.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: measured mass leaving as aluminium scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Copper scrap (copper_scrap)

Record separately collected copper-tube offcuts and chips from the declared route.

• Selected flow: Copper Scrap 4fbbb5f1-560a-4052-ba0c-652c5dfc282e
• Flow property / unit: Mass / kg
• Amount rule: measured mass leaving as copper scrap
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Waste cutting oil (waste_cutting_oil)

Record spent cutting oil removed for off-site recovery, treatment, or disposal.

• Selected flow: Waste cutting oil 80d926e3-0f76-4a19-9b1e-ffec9deb1216
• Flow property / unit: Mass / kg
• Amount rule: measured mass transferred out of the recirculating system
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_waste_mass

Elementary flows

Process: Joining, cleaning, and finishing (joining_cleaning_finishing)

Inputs

Product flows

Joining and finishing electricity (electricity_joining)

Record purchased electricity for welding, brazing auxiliaries, cleaning, drying, and finishing.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or documented causal allocation from a shared meter
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_metering

Carbon-dioxide shielding gas (carbon_dioxide_shielding_gas)

Record purchased carbon dioxide only when used as welding shielding gas.

• Selected flow: Carbon dioxide 27f41c1c-535e-4d2a-bce9-2c7f4de11549
• Flow property / unit: Mass / kg
• Amount rule: supplier mass, cylinder mass difference, or mass converted from metered volume at declared conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_process_gas

Natural gas for process heat (natural_gas)

Record gaseous natural gas only when an on-site furnace, burner, dryer, or joining operation consumes it.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: metered volume at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_process_gas

Process water (process_water)

Record water supplied to aqueous cleaning, rinsing, leak testing, or finishing; identify source and quality.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered or batch-recorded water input
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_balance

Sodium hydroxide for alkaline cleaning (sodium_hydroxide)

Record active sodium-hydroxide mass when an alkaline cleaning bath uses it; distinguish fresh make-up from recirculated bath inventory.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: measured active sodium-hydroxide mass in fresh make-up
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_cleaning_chemistry

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Wastewater (wastewater)

Record aqueous wastewater from cleaning, rinsing, or testing. Characterize oil, metal, detergent, pH, treatment state, and destination.

• Selected flow: Wastewater d2d44ce1-c0f4-461d-9413-f4b33e0d200f
• Flow property / unit: Mass / kg
• Amount rule: measured discharged or transferred wastewater mass
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_balance

Elementary flows

Direct fossil carbon dioxide (carbon_dioxide_fossil)

Record direct fossil carbon dioxide emitted to air from on-site natural-gas combustion; exclude upstream electricity emissions.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: measured stack emission allocated to the production batch
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_direct_emission

Process: Assembly, testing, inspection, and factory-gate release (assembly_testing_release)

Inputs

Product flows

Assembly and testing electricity (electricity_testing)

Record purchased electricity for assembly tools, pressure or leak-test equipment, evacuation, charging, and inspection.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: submetered electricity or documented causal allocation from a shared meter
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_metering

R404A refrigerant (refrigerant_r404a)

Record R404A only when it crosses the site boundary for charging or testing. State purchased, recovered, retained, and returned quantities separately.

• Selected flow: Refrigerant, R404A 33db0143-ba65-4036-a57b-e32dcdecb779
• Flow property / unit: Mass / kg
• Amount rule: measured R404A mass introduced to the in-scope system
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_refrigerant_balance

Waste flows

Elementary flows

Outputs

Product flows

Finished machinery part (finished_machinery_part)

Record only conforming output meeting the declared drawing and release criteria.

• Selected flow: Parts of producer gas or water gas generators, parts of acetylene gas generators and similar water process gas generators, parts for the goods of subclass 43912, parts of refrigerating and freezing equipment and heat pumps, parts of machinery for the treatment of materials by a process involving a change of temperature cdee7105-36d3-4fd3-8418-f9498bf159bc
• Flow property / unit: Mass / kg
• Amount rule: measured conforming finished-part mass normalized to exactly 1 kg reference output
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_product_release

Waste flows

Elementary flows

R404A released to air (r404a_to_air)

Record only R404A released from charging, recovery, or testing to air. Keep the UUID unresolved until an exact state-100 R404A-to-air identity is available.

• Selected flow: Refrigerant R404A to air
• Flow property / unit: Mass / kg
• Amount rule: opening inventory plus purchased plus recovered in, minus retained charge, recovered out, and closing inventory
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming finished part
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_refrigerant_balance

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision	independently metered operations	Avoid allocation by directly assigning BOM materials, metered energy, chemicals, refrigerant, wastes, and emissions to the part family or batch.
allocation_shared_operations	shared utilities or equipment	When direct measurement is unavailable, use the physical driver that caused the exchange, such as machine time, treated area, weld length, bath make-up, or test duration; disclose the driver and sensitivity.
allocation_scrap	metal scrap outputs	Record each segregated scrap stream as waste at the foreground boundary. Do not subtract avoided-production credit; any recycling substitution belongs in a separately declared downstream scenario.
allocation_rework	rework and rejects	Assign rework inputs and rejects to the batch that generated them; do not remove their burdens from the conforming-output denominator.

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_material_and_waste_mass	material_preparation	named metal inputs, cutting fluid, and segregated wastes	BOM issue, return, scale, and transfer records	part_id; batch_id; material_grade; flow_name; issued_mass; returned_mass; waste_mass; disposition; timestamp	reconcile issues and returns with calibrated scale or transfer records for each flow	kg	each batch or order	representative continuous campaign	each site and route	sum by atomic flow and batch, then normalize to conforming output	BOM revision; certificate; scale calibration; transfer note; reconciliation
cp_energy_metering	all processes	electricity	submeter or shared-meter allocation record	meter_id; opening; closing; unit; interval; process_id; machine_time; batch_id	direct submetering preferred; otherwise causal allocation	original meter unit and MJ	each batch or shortest interval	same period as production	each site	subtract readings, remove non-production load, assign by process, convert, normalize	calibration; allocation worksheet; production log
cp_process_gas	joining_cleaning_finishing	natural gas and carbon dioxide	meter, cylinder, or supplier record	gas_identity; opening; closing; delivered; returned; temperature; pressure; moisture_basis; batch_id	meter difference or cylinder/supplier reconciliation	m3 or kg	each batch or delivery interval	same period as operation	each site	convert only with declared conditions, assign, normalize	calibration; supplier ticket; cylinder reconciliation
cp_water_balance	joining_cleaning_finishing	process water and wastewater	input, discharge, and transfer records	source; input; discharge; density; oil; metals; detergent; pH; treatment; destination; batch_id	separate input and discharge measurement with characterization	kg	each batch or day	same period as operation	each site	convert with documented density, sum separately, normalize	calibration; laboratory result; discharge record
cp_cleaning_chemistry	joining_cleaning_finishing	sodium hydroxide	purchase, concentration, and bath make-up record	product_mass; sodium_hydroxide_fraction; make_up_mass; returned_mass; bath_id; batch_id	calculate active mass from make-up and verified concentration	kg active	each make-up and batch	same period as cleaning	each line	sum active fresh make-up assigned to batch, normalize	supplier certificate; concentration test; scale; bath log
cp_direct_emission	joining_cleaning_finishing	fossil carbon dioxide	stack measurement record	period; concentration; exhaust_flow; temperature; pressure; moisture; operating_time; batch_id	site measurement at representative operation	kg	each representative test and batch	same period as combustion	each emission point	integrate mass, assign, normalize	sampling report; calibration; operating log
cp_refrigerant_balance	assembly_testing_release	R404A input, retained charge, recovery, inventory, release	cylinder and charging-system balance	identity; opening_inventory; purchased; recovered_in; retained; recovered_out; closing_inventory; batch_id	calibrated scale or charging-machine record over complete circuit	kg	each batch and cylinder change	same period as testing	each circuit	close by identity and batch; calculate release from reconciled difference	calibration; cylinder log; charging record; reconciliation
cp_product_release	assembly_testing_release	conforming output	release, inspection, and scale record	part_id; drawing_revision; batch_id; gross_mass; excluded_packaging_mass; conforming; reject; rework; release_time	weigh conforming output and reconcile rejects and rework	kg	each batch	same period as inputs	each site	sum conforming mass, subtract excluded packaging, normalize to 1 kg	calibration; inspection; release; reject and rework log

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize_reference_mass	every exchange	normalized amount = batch exchange amount divided by conforming finished-part mass	exchange total; conforming output mass	amount per 1 kg finished part
calc_sodium_hydroxide_active	sodium_hydroxide	active mass = fresh solution make-up mass multiplied by verified sodium-hydroxide mass fraction	make-up mass; concentration	kg active sodium hydroxide
calc_refrigerant_release	r404a_to_air	release = opening inventory + purchased + recovered in - retained charge - recovered out - closing inventory; investigate negative or unexplained results	refrigerant balance fields	kg R404A released
calc_material_reconciliation	each metal route	Reconcile issued material with returns, product content, segregated scrap, work in process, and documented loss; do not force an unidentified remainder into a named flow.	BOM and mass records	route reconciliation and residual

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	product and flows	Preserve flow identity, grade, state, direction, and UUID status; do not merge dissimilar materials, wastes, utilities, or emissions.	BOM; certificate; state-100 audit; unresolved manifest entries
dq_temporal	foreground data	Use one coherent period and align energy, material, waste, emission, and output records.	dated records
dq_measurement	measured values	Retain calibration, original units, readings, conversion conditions, and allocation worksheets.	certificates; logs; worksheets
dq_completeness	route coverage	Reconcile the process map to the route and document non-applicable conditional processes and atomic rows.	route traveller; checklist; BOM
dq_range_evidence	important flows	Foreground collection remains mandatory; apply no external range until at least two independent, original, boundary-compatible sources support a reviewed synthesis.	manifest range-evidence needs and later review
dq_classification	product scope	Verify the output is specifically a part for a listed equipment family and is not a complete machine.	un-cpc-3-0-structure-2025; drawing; sales specification

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_output	reference flow	Confirm the denominator is exactly 1 kg measured conforming output and excluded packaging is not embedded in it.
validate_part_scope	product identity	Confirm the drawing ties the output to a covered equipment family and the output is a part rather than complete equipment.	un-cpc-3-0-structure-2025
validate_process_coverage	system boundary	Compare the route with the process map; include every applicable operation and document why each conditional item is absent.
validate_atomic_inventory	process inventory	Reject merged material, energy, fuel, chemical, refrigerant, waste, or emission labels; each row preserves one flow identity.
validate_mass_reconciliation	material routes	Check each metal and refrigerant reconciliation; investigate residuals and disclose work in process, rework, rejects, recovery, and uncertainty.
validate_uuid_state	Tiangong references	Require public state_code=100 and property/unit compatibility for populated UUIDs; preserve unresolved rows without a proxy.
validate_bilingual_identity	Chinese rendering	Confirm row ids, UUIDs, controlled values, and order match English, and use exact Tiangong Chinese baseName values.

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset after review
downstream_use	Foreground data packages and downstream process or lifecyclemodel projections for manufacture of the declared part
allowed_use	Cradle-to-factory-gate modelling of representative parts with matching BOM, route, geography, period, test boundary, and refrigerant state
excluded_use	Complete equipment; household appliances; installation; use-phase performance or leakage; maintenance; end-of-life; unlike functions without functional-equivalence study
required_metadata	canonical PCR id; part family; equipment family; drawing; BOM and grades; finished mass; route; site; geography; period; allocation drivers; refrigerant state; test boundary; packaging and transport inclusion; upstream substitutions
required_quality_disclosure	UUID and range gaps; data age; meter coverage; allocation; material and refrigerant reconciliation; rework and rejects; wastewater characterization; omissions; uncertainty
update_trigger	Change in design, principal material, route, joining or cleaning technology, refrigerant, test, site, energy, allocation driver, upstream dataset, or representative period

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	United Nations Statistics Division, Central Product Classification 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 2026-09-06)	Official CPC 43941 English classification identity and listed equipment-part scope; not inventory quantities or ranges