Producer gas or water gas generators; acetylene gas generators and similar water process gas generators; distilling or rectifying plant; heat exchange units; machinery for liquefying air or gas

1. Scope and Applicability

This PCR governs factory-gate foreground data packages for completed industrial equipment whose declared product is a producer-gas or water-gas generator, an acetylene or comparable water-process gas generator, a distilling or rectifying plant, a heat exchange unit, or machinery for liquefying air or another gas. The official CPC 3.0 structure groups these products in subclass 43911, and the International EPD System machinery PCR independently confirms that general-purpose machinery in CPC group 439 is a methodology-bearing category (un-cpc-3-0-structure-2025; epd-international-pcr-2010-08-v4-0-2).

The common semantic boundary is a completed, tested item of process equipment transferred at the manufacturing-site gate. A data package shall name one concrete equipment subgroup and model; this PCR does not imply that unlike generators, columns, heat exchangers, or cryogenic plants have equivalent function. Use-stage energy, process feed, installation, maintenance, replacement parts, distribution, and end-of-life are excluded from the reference dataset unless a downstream study adds them as separately disclosed modules. Stand-alone replacement parts, gas products, industrial-gas production, construction work, air-conditioning machines, refrigerating equipment, and heat pumps are outside this PCR.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.general-purpose-machinery.producer-gas-or-water-gas-generators-acetylene-gas-generators-and-similar-water-process-122c8596
classification_refs	CPC 3.0: 43911 (exact classification context; mapping acceptance is governed separately)
covered_products	Completed producer-gas or water-gas generators; acetylene or comparable water-process gas generators; distilling or rectifying plants; heat exchange units; machinery for liquefying air or another gas
excluded_products	The gases made or handled by the equipment; parts sold separately; site erection and construction; air-conditioning machines; refrigerating or freezing equipment; heat pumps; unrelated temperature-treatment machinery
representative_product	One declared, completed and factory-tested equipment model within a single covered subgroup
production_route	Supplier components and metals are received; applicable in-house fabrication, joining and surface preparation are performed; the unit is assembled, tested and released; outbound packaging is added when supplied
market_state	Complete equipment at the manufacturing-site gate, dry and empty of customer process fluid except unavoidable test residues, with included auxiliaries and outbound packaging status declared

3. Reference Flow

Field	Value
What	Provide the declared gas-generation, distillation or rectification, heat-transfer, or air/gas-liquefaction equipment function
How much	The rated duty delivered by one declared completed equipment item; inventory exchange is normalized to 1 kg of that item at the factory gate
How well	At the declared equipment subgroup, model, rated capacity or thermal duty, design pressure, operating-temperature envelope, materials of construction, efficiency or performance criterion, and test/acceptance standard
How long or cycle	One completed manufacturing cycle through factory acceptance and gate transfer; service life is not part of this factory-gate reference flow
reference_flow_link	One kilogram of the declared completed equipment realizes the mass-normalized reference flow; functional comparison additionally requires equivalent declared duty and performance qualifiers

Field	Value
Reference amount	1 kg
Reference product flow	Producer gas or water gas generators, acetylene gas generators and similar water process gas generators, distilling or rectifying plant, heat exchange units, machinery for liquefying air or gas 0981e6ca-1eb5-49dd-b1af-cf251bdaef10
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	covered equipment subgroup; manufacturer and model; rated capacity, heat duty, or gas throughput; design pressure; operating-temperature range; working fluid or design medium; materials of construction and bill-of-material completeness; included auxiliaries and controls; production site and reference year; factory-test method and acceptance status; gate condition; packaging inclusion; allocation basis

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. Missing required qualifiers make the reference flow definition incomplete for that data package.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	Completed reference equipment	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh the shipped equipment configuration or calculate its mass from a reconciled bill of materials. Include installed auxiliaries and supplied packaging only as separately identified masses. Normalize every inventory exchange to 1 kg of completed equipment.
material_mass	Metal, sealing, chemical, packaging and waste rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Preserve measured or purchasing-record mass. Where records use pieces, area or volume, retain the count/dimension/density evidence and the conversion calculation.
electrical_energy	Electricity rows	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve metered electricity before normalization. Convert kWh to MJ with 1 kWh = 3.6 MJ; do not mix purchased electricity with onsite fuel.
gaseous_fuel_volume	Natural-gas row	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	Record metered gaseous natural gas at the supplier or meter reference conditions. State temperature, pressure and whether the volume is normal, standard or actual; do not convert volume without those conditions.
water_mass	Process-water and test-water rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record supplied water mass. A volume record may be converted only with a documented density and measurement conditions; reused water is reported separately from gross intake.

5. System Boundary

The foreground boundary begins when purchased materials, components, packaging and delivered utilities cross the manufacturing-site boundary. It ends when the completed tested equipment crosses the factory gate. Supplier production is represented by upstream datasets; onsite fabrication, joining, preparation, assembly, testing, waste handling before transfer, and direct elementary emissions are foreground activities. The boundary follows the supply-chain and foreground-flow identification principles of the EU Product Environmental Footprint method (eu-pef-recommendation-2021-2279).

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased metals, components, chemicals, packaging and utilities delivered to the manufacturing site, with supplier identity, material specification, quantity and delivery geography recorded
starting_condition_role	The upstream production of purchased inputs is represented by linked secondary or supplier-specific datasets and is not recreated inside the foreground manufacturing processes
product_classification_scope	One declared completed product within the semantic CPC 3.0 subclass 43911 equipment boundary; the concrete equipment subgroup is mandatory
recursive_input_rule	A purchased complete CPC 43911 machine incorporated into a larger delivered plant is recorded once as an upstream product input and is not recursively decomposed unless its supplier-specific foreground inventory replaces that upstream dataset
upstream_dataset_requirement	Each purchased input shall link to a geographically and technologically representative upstream dataset with material grade, product form, recycled content where relevant, and delivery boundary disclosed
disclosure	Declare equipment subgroup and model, function and duty, pressure/temperature envelope, working medium, bill of materials, included auxiliaries, production site and year, processes actually operated, test residues, packaging status, exclusions, cut-offs and allocation

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	foreground_system	Include purchased inputs, onsite manufacturing and testing, onsite waste outputs and direct elementary flows through release of the completed equipment at the factory gate. Keep installation, use, maintenance and end-of-life outside this reference dataset.	eu-pef-recommendation-2021-2279, alfa-laval-epd-s-p-12165-2024
boundary_process_applicability	process_map	Include each conditional process only when production records show that it is performed for the declared model; disclose outsourced operations and represent them with supplier-specific or representative upstream datasets.	eu-pef-recommendation-2021-2279
boundary_complete_flows	foreground_inventory	Identify each foreground co-product, by-product, waste stream and direct elementary flow separately. An excluded flow requires documented screening and shall not be hidden in a combined utility or waste row.	eu-pef-recommendation-2021-2279

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
materials_and_components	Materials and components receipt	required	Always include the reconciled bill of materials for the declared equipment configuration	Foreground purchasing and product composition	Per 1 kg completed reference equipment
fabrication_and_joining	In-house fabrication and joining	conditional	Include when plate cutting, forming, machining, welding, brazing or thermal treatment occurs at the reporting site	Foreground manufacture	Per 1 kg completed reference equipment
surface_preparation	In-house surface preparation and cleaning	conditional	Include when alkaline cleaning, rinsing, pickling, passivation or another wet preparation step occurs onsite	Foreground finishing	Per 1 kg completed reference equipment
assembly_and_testing	Assembly and factory testing	required	Always include final assembly and the factory acceptance activities performed for the declared model	Foreground assembly and release	Per 1 kg completed reference equipment
outbound_packaging	Outbound packaging	conditional	Include each packaging item supplied with the factory-gate product	Foreground packing	Per 1 kg completed reference equipment

Process: Materials and components receipt (materials_and_components)

Inputs

Product flows

Steel plate incorporated in the equipment (steel_plate)

Steel plate is recorded when the declared bill of materials contains purchased alloy-steel plate that becomes part of the equipment.

• Selected flow: Steel Plate 421db3a5-394d-410b-8ebf-af23a37fc878
• Flow property / unit: Mass / kg
• Amount rule: Net purchased steel-plate mass incorporated plus attributable plate losses, reconciled to receiving and bill-of-material records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bill_of_materials
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Stainless-steel plate incorporated in the equipment (stainless_steel_plate)

Stainless-steel plate is recorded separately when a declared grade is incorporated; its Tiangong identity remains unresolved because audited candidates did not align name, classification and product form.

• Selected flow: Stainless-steel plate
• Flow property / unit: Mass / kg
• Amount rule: Net purchased stainless-steel-plate mass by declared grade incorporated plus attributable plate losses
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bill_of_materials
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Purchased sealing elements (sealing_elements)

Purchased gaskets and other sealing elements are recorded when installed in the declared equipment; elastomer chemistry and specification are mandatory qualifiers.

• Selected flow: Sealing elements a9943e4e-1a21-412c-859e-df09a2b5ee6f
• Flow property / unit: Mass / kg
• Amount rule: Mass of installed purchased sealing elements, separated by declared elastomer or material specification in the foreground records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_bill_of_materials
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Process: In-house fabrication and joining (fabrication_and_joining)

Inputs

Product flows

Fabrication electricity (fabrication_electricity)

Electricity used by onsite cutting, forming, machining, welding, brazing and associated extraction is metered or allocated to the declared equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered fabrication electricity or an allocation from a documented shared meter using machine time and rated or measured load
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_energy
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Natural gas for onsite thermal operations (fabrication_natural_gas)

Gaseous natural gas is included only when an onsite fabrication, preheating, stress-relief or similar thermal operation consumes it.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: Metered or invoice-reconciled natural-gas volume attributable to included fabrication operations at declared reference conditions
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_fuel
• Sources: eu-pef-recommendation-2021-2279

Process water for machining or fabrication (fabrication_process_water)

Process water is included when it is supplied to water-based machining fluid, cutting, cooling or fabrication cleaning within this process.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Gross supplied process-water mass less separately documented internal reuse, allocated to included fabrication operations
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_water
• Sources: us-epa-mpm-development-document-2003, eu-pef-recommendation-2021-2279

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Steel scrap from fabrication (steel_scrap)

Ferrous plate offcuts, chips and rejected steel parts leaving the foreground process for recovery or disposal are recorded as steel scrap.

• Selected flow: Steel scrap 37997e0e-e34b-4ab9-a642-5d86f4333919
• Flow property / unit: Mass / kg
• Amount rule: Weighed steel scrap attributable to the declared equipment, reconciled against material input and incorporated mass
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_waste
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Elementary flows

Fossil carbon dioxide from onsite natural-gas combustion (fabrication_carbon_dioxide_fossil)

Direct fossil carbon dioxide is included only for natural gas combusted inside the foreground boundary; upstream electricity and supplier emissions are excluded from this elementary-flow row.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Direct measured emission or fuel-specific calculation from the included natural-gas record using a documented carbon-content or emission-factor method
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_direct_emissions
• Sources: eu-pef-recommendation-2021-2279

Process: In-house surface preparation and cleaning (surface_preparation)

Inputs

Product flows

Sodium hydroxide for alkaline surface cleaning (surface_cleaning_sodium_hydroxide)

Sodium hydroxide is recorded only when it is consumed in an onsite alkaline cleaning bath or solution; solution concentration and replenishment basis are declared.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: Mass of sodium hydroxide active substance charged or replenished, calculated from purchased solution mass and concentration
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_surface_chemicals
• Sources: us-epa-mpm-development-document-2003

Process water for surface cleaning and rinsing (surface_cleaning_process_water)

Process water crossing the site boundary for cleaning-bath make-up or rinsing is recorded when wet surface preparation is performed.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Metered or tank-balance gross water supplied to included cleaning and rinse steps, with recovered and recirculated water disclosed separately
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_water
• Sources: us-epa-mpm-development-document-2003

Electricity for surface preparation (surface_cleaning_electricity)

Electricity for pumps, agitation, ventilation, heating controls and wastewater-transfer equipment is recorded separately from fabrication electricity.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered electricity or documented shared-meter allocation to the included surface-preparation process
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_energy
• Sources: us-epa-mpm-development-document-2003, eu-pef-recommendation-2021-2279

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Wastewater from surface preparation (surface_finishing_wastewater)

The concrete aqueous waste stream leaving the cleaning, rinsing, pickling or passivation operation is recorded with its process origin and composition; a Tiangong UUID is not assigned because the audited condensate candidate is not exact.

• Selected flow: Metal surface-finishing wastewater
• Flow property / unit: Mass / kg
• Amount rule: Measured discharged or offsite-transferred wastewater mass attributable to the declared equipment, with dissolved and suspended contaminant evidence retained
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_surface_wastewater
• Sources: us-epa-mpm-development-document-2003

Elementary flows

Process: Assembly and factory testing (assembly_and_testing)

Inputs

Product flows

Assembly and test electricity (assembly_electricity)

Electricity used for assembly tools, handling equipment, control-system configuration, leak testing and factory acceptance is recorded for the declared equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered electricity or documented allocation from equipment test duration and measured or rated load
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_energy
• Sources: alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

Water supplied for hydrostatic testing (hydrostatic_test_water)

Process water is included only when the declared equipment undergoes hydrostatic testing; reused test water and discharged water are distinguished in the records.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Gross make-up water supplied to the test circuit attributable to the declared equipment, excluding internally recirculated volume
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_factory_testing
• Sources: eu-pef-recommendation-2021-2279

Waste flows

Elementary flows

Outputs

Product flows

Completed factory-gate process equipment (reference_product)

The completed, accepted equipment item is the reference-product output. Its concrete subgroup and functional-performance qualifiers are mandatory even though the Tiangong identity represents the whole CPC 43911 product category.

• Selected flow: Producer gas or water gas generators, acetylene gas generators and similar water process gas generators, distilling or rectifying plant, heat exchange units, machinery for liquefying air or gas 0981e6ca-1eb5-49dd-b1af-cf251bdaef10
• Flow property / unit: Mass / kg
• Amount rule: 1 kg of completed reference equipment after reconciliation to the declared shipped configuration
• Value mode: Fixed value (fixed_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Identity reference (identity_reference)
• Sources: un-cpc-3-0-structure-2025

Waste flows

Elementary flows

Process: Outbound packaging (outbound_packaging)

Inputs

Product flows

EURO wooden pallet (euro_wooden_pallet)

A EURO wooden pallet is recorded only when that specified pallet is supplied with the declared equipment; other pallet specifications require their own atomic flow.

• Selected flow: Wooden pallet (EURO) 96b2b9ac-cfb6-46bf-8ad1-c056e338950a
• Flow property / unit: Mass / kg
• Amount rule: Mass of the supplied EURO pallet allocated to the declared equipment, adjusted for documented reuse only when ownership and reuse cycles are evidenced
• Value mode: Calculated value (calculated_value)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_outbound_packaging
• Sources: alfa-laval-epd-s-p-12165-2024

Plastic protective film (plastic_film)

Plastic film is recorded when it is supplied as protective or transport packaging; polymer, thickness and recycled content are declared.

• Selected flow: Plastic Film 8c3dd40c-a22b-48b5-bdec-7da4d3282bfa
• Flow property / unit: Mass / kg
• Amount rule: Net mass of plastic film supplied with the declared equipment from packaging issue or weighed packing records
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1 kg completed reference equipment
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_outbound_packaging
• Sources: alfa-laval-epd-s-p-12165-2024

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivide_first	shared_manufacturing_processes	First subdivide metered processes, production orders, machine time, test runs and waste records so inputs and outputs are directly attributable to the declared equipment. Use system expansion only when a documented additional function is deliberately included.	eu-pef-recommendation-2021-2279
allocation_physical_relation	residual_shared_inputs_outputs	When subdivision is not possible, use a causal physical parameter such as machine time multiplied by measured load, processed plate area, weld length, test duration or equipment mass. State the chosen key and reconcile allocated totals to site records.	eu-pef-recommendation-2021-2279, alfa-laval-epd-s-p-12165-2024
allocation_economic_last_resort	residual_multifunctionality	Use economic allocation only when neither subdivision, system expansion nor a defensible physical relation is possible; disclose prices, reference period, sensitivity and affected flows.	eu-pef-recommendation-2021-2279
allocation_scrap_no_avoided_burden	steel_scrap	Report steel scrap leaving the foreground boundary as a waste output. Do not subtract an avoided virgin-steel burden inside this factory-gate inventory; downstream recycling modelling is a separate disclosed choice.	eu-pef-recommendation-2021-2279

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_bill_of_materials	materials_and_components	incorporated purchased material or component	ERP bill of materials, receiving record and as-built release record	item id; material specification; product form; supplier; received mass; installed mass; production order; reject quantity	Reconcile as-built bill of materials to purchasing and receiving records for the declared configuration	kg	Each production order	All units represented by the dataset reference period	Manufacturing site and declared equipment model	Sum installed and attributable loss mass by atomic material or component flow; normalize by accepted equipment mass	Approved bill of materials; material certificates; receiving records; mass reconciliation
cp_process_energy	fabrication_and_joining; surface_preparation; assembly_and_testing	electricity by process	submeter, machine log and production order	meter start; meter end; machine id; run time; load; process id; production order	Prefer process submetering; otherwise allocate shared metered electricity with documented operating time and measured or rated load	MJ	Per batch or monthly meter period	Representative continuous 12-month period where available	All included production areas at the reporting site	Subtract non-production and excluded-product loads, allocate to production orders, then divide by accepted equipment mass	Calibrated meter record; allocation worksheet; energy invoice reconciliation
cp_process_fuel	fabrication_and_joining	natural gas for included thermal operation	fuel meter, invoice and furnace log	volume; reference temperature; reference pressure; meter period; equipment id; run time; production order	Reconcile meter totals to invoices and allocate only fuel consumed by included operations	m3	Each meter period	Representative continuous 12-month period where available	Included onsite thermal equipment	Sum attributable reference-condition volume and divide by accepted equipment mass	Meter calibration; invoice reconciliation; stated reference conditions
cp_process_water	fabrication_and_joining; surface_preparation	supplied process water	water meter, tank balance and batch log	intake; make-up; return; blowdown; process id; batch id; production order	Meter gross intake and document internal recirculation without counting it as a new boundary input	kg	Per batch or monthly meter period	Representative continuous 12-month period where available	Included water-using processes	Allocate net supplied boundary input to production orders and normalize by accepted equipment mass	Meter calibration; tank-balance reconciliation; reuse log
cp_process_waste	fabrication_and_joining	steel scrap	scrap scale ticket and production order	tare; gross mass; material grade; contamination; destination; production order	Weigh segregated ferrous scrap; allocate mixed collection by documented production records	kg	Each removal or production batch	Same period as material input records	Included fabrication areas	Sum attributable scrap and reconcile material input to incorporated product and other identified outputs	Scale calibration; hauler ticket; mass-balance worksheet
cp_direct_emissions	fabrication_and_joining	direct fossil carbon dioxide	continuous measurement or fuel calculation record	measured emission; fuel volume; reference conditions; fuel carbon content or factor; oxidation basis; calculation version	Use direct measurement when representative; otherwise calculate from the same fuel record with a documented factor method	kg	Each fuel meter period	Same period as fuel consumption	Foreground combustion sources only	Sum direct fossil CO2 and divide by accepted equipment mass	Instrument QA or traceable factor source; calculation worksheet; fuel reconciliation
cp_surface_chemicals	surface_preparation	sodium hydroxide active substance	purchase, bath make-up and concentration record	solution mass; concentration; bath id; replenishment; carryover; production order	Determine active-substance mass from weighed solution and verified concentration	kg	Each bath make-up and replenishment	Same period as surface-preparation production	Included wet preparation lines	Sum active-substance charge attributable to production orders and normalize by accepted equipment mass	Supplier certificate; concentration test; bath log; calculation record
cp_surface_wastewater	surface_preparation	metal surface-finishing wastewater	discharge meter, tank transfer and laboratory record	wastewater mass or volume; density; pH; dissolved metals; suspended solids; treatment state; destination; production order	Measure each concrete waste stream at discharge or offsite transfer and retain representative chemistry	kg	Each discharge or transfer	Same period as surface-preparation inputs	Included cleaning, rinsing, pickling and passivation operations	Sum stream-specific mass after internal reuse; allocate by bath campaign or production records	Meter or scale calibration; laboratory report; transfer document; water balance
cp_factory_testing	assembly_and_testing	hydrostatic-test water	test sheet and water make-up record	equipment serial; internal volume; make-up water; recovered water; discharge; test date; result	Record only boundary-crossing make-up water, not recirculated test-loop inventory	kg	Each tested unit	All represented tested units	Factory test area	Sum make-up water for accepted and attributable failed tests, then divide by accepted equipment mass	Signed test sheet; water balance; instrument calibration
cp_outbound_packaging	outbound_packaging	supplied pallet or film	packing list, issue record and scale record	packaging item; material; specification; issued quantity; mass; reuse status; production order	Weigh or calculate mass from verified item mass and count for each atomic packaging item	kg	Each shipment	All shipments represented by the dataset	Factory-gate packaging operation	Sum packaging supplied with the declared configuration and normalize by accepted equipment mass	Packing list; scale record; supplier specification; reuse evidence

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_normalization	all inventory rows	normalized amount = attributable period amount / accepted completed-equipment mass for the same production orders	attributable flow amount; accepted equipment mass	Flow amount per 1 kg completed reference equipment	eu-pef-recommendation-2021-2279
calc_electricity_conversion	electricity rows	electricity in MJ = metered electricity in kWh × 3.6	metered kWh	MJ of electricity
calc_active_sodium_hydroxide	surface_cleaning_sodium_hydroxide	active NaOH mass = solution mass × measured or supplier-certified mass fraction	solution mass; NaOH mass fraction	kg sodium hydroxide	us-epa-mpm-development-document-2003
calc_material_reconciliation	bill of materials and steel scrap	purchased attributable mass = incorporated accepted-product mass + segregated attributable scrap + other separately identified losses, adjusted for opening and closing work in progress	receiving mass; installed mass; scrap mass; other losses; work-in-progress change	Reconciled atomic material flows	eu-pef-recommendation-2021-2279

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	The equipment subgroup, model, function, duty, pressure/temperature envelope, working medium, bill of materials and included auxiliaries shall be unambiguous.	Released drawing and bill of materials; datasheet; factory acceptance record
dq_temporal	foreground activity data	Use one consistent representative period, normally 12 continuous months where production occurs, and disclose any shorter campaign, abnormal shutdown or extrapolation.	Meter periods; production ledger; explanation of representativeness
dq_mass_balance	material and waste rows	Reconcile major purchased material masses to accepted product, work in progress and separately identified waste or loss; explain residual differences.	Signed mass-balance worksheet; scale and ERP records
dq_meter_allocation	shared energy and water	Shared-meter allocation shall use a causal driver and reconcile to the meter total without double counting.	Meter export; allocation key; reconciliation and sensitivity check
dq_geography_technology	upstream datasets	Match material grade, product form, energy mix, supplier region, recycled content and technology where material; disclose proxies and data gaps.	Dataset metadata; supplier documentation; proxy register
dq_completeness	foreground inventory	Record each atomic utility, material, packaging item, waste stream and direct elementary flow separately. Document exclusions and screening.	Completeness checklist tied to purchasing, meter, waste and emission records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity_and_reference	reference_flow	Reject a data package if the concrete equipment subgroup or any required qualifier is missing, or if the reference product is not normalized to 1 kg of accepted factory-gate equipment.	un-cpc-3-0-structure-2025, eu-pef-recommendation-2021-2279
validate_process_applicability	process_inventory	Every conditional process shall be marked applicable or not applicable for the declared model. Applicable processes require their atomic inputs and outputs; outsourced processes require disclosed upstream datasets.	eu-pef-recommendation-2021-2279
validate_inventory_reconciliation	foreground_inventory	Check that collected and calculated rows link to their protocols, units and production period; reconcile shared meters, bill-of-material masses, steel scrap, water balances and accepted output mass.	eu-pef-recommendation-2021-2279, us-epa-mpm-development-document-2003
validate_direct_emission_scope	elementary_flows	Fossil CO2 in fabrication_carbon_dioxide_fossil shall represent only direct onsite combustion associated with the reported fuel row; upstream and electricity emissions shall remain in upstream datasets.	eu-pef-recommendation-2021-2279
validate_no_unsupported_ranges	amount_ranges	Do not apply an external empirical range unless at least two independent sources have compatible boundary, functional basis and product state. In the absence of such evidence, use the foreground collection rule and disclose the unresolved evidence need.
validate_comparability	comparative_use	Do not compare unlike equipment subgroups or models solely on the 1 kg reference. Comparative use additionally requires equivalent function, rated duty, performance, pressure, temperature, working medium, service assumptions and boundary.	alfa-laval-epd-s-p-12165-2024, eu-pef-recommendation-2021-2279

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset for factory-gate manufacture of one declared CPC 43911 equipment configuration
downstream_use	Link the dataset as the supplied-equipment input to a process or lifecycle model that separately models installation, operation, maintenance, replacement and end-of-life where relevant
allowed_use	Attributional product-system modelling, supply-chain screening and equipment-manufacturing improvement where the declared model, technology, geography, reference year and factory-gate boundary are representative
excluded_use	Direct comparison of unlike equipment subgroups or performance; representation of industrial gas production; use-stage energy modelling; installation or construction; spare parts; unqualified global average claims
required_metadata	PCR id and version state; equipment subgroup and model; function and rated duty; pressure and temperature envelope; working medium; shipped mass; bill-of-material scope; included auxiliaries; site and reference year; process applicability; upstream dataset choices; packaging status; allocation and exclusions
required_quality_disclosure	Foreground coverage period; meter and scale QA; mass, water and energy reconciliation; allocation keys; supplier-data share; proxy datasets; unresolved UUIDs and range-evidence needs; data gaps and cut-offs
update_trigger	Change in model design or bill of materials, production route, site, energy supply, surface chemistry, test method, packaging configuration, allocation key, upstream dataset representativeness, or foreground data older than the declared review interval

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	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	Official CPC 43911 classification identity and English scope
epd-international-pcr-2010-08-v4-0-2	standard	EPD International, PCR 2010:08 Other special- and general-purpose machinery and parts thereof, version 4.0.2, https://www.environdec.com/pcr-library/pcr2010-08	Independent confirmation that general-purpose machinery in CPC group 439 is within a machinery PCR scope
alfa-laval-epd-s-p-12165-2024	dataset	Alfa Laval Technologies AB, Environmental Product Declaration S-P-12165, Gasketed Plate Heat Exchanger T10-BFM/AQ4T-BFM, 10 April 2024, https://api.prod.environdec.com/api/v1/EPDLibrary/Files/EPDs/b8d9fc22-5379-4973-8795-08dc0c7232d4/Documents	Original-text-verified CPC 43911 heat-exchanger example; declared unit; steel, rubber and plastic composition; packaging; company-specific material, energy, consumable and waste data expectations; physical allocation example
eu-pef-recommendation-2021-2279	official_guidance	European Commission Recommendation (EU) 2021/2279, Annex I Product Environmental Footprint Method, https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:02021H2279-20211230	Functional unit and reference flow, supply-chain boundary, foreground flow identification, company-specific bill of materials and manufacturing data, allocation hierarchy, and data-quality principles
us-epa-mpm-development-document-2003	official_guidance	U.S. Environmental Protection Agency, Development Document for the Final Effluent Limitations Guidelines and Standards for the Metal Products and Machinery Point Source Category, 2003, https://www.epa.gov/sites/default/files/2015-11/documents/mp-m_dd_2003.pdf	Original-text-verified machining, metal-working-fluid, cleaning, painting, water-use, wastewater and process-monitoring context for conditional foreground operations
cn-mof-tariff-2026	official_guidance	Ministry of Finance of the People's Republic of China, 2026 tariff commodity nomenclature, https://m.mof.gov.cn/czxw/202603/P020260326610286964491.pdf	Verified professional Chinese terminology for distilling or rectifying equipment, heat exchange units, and machinery for liquefying air or other gas