Padlocks and locks, of base metal; clasps and frames with clasps, incorporating locks, of base metal; keys and parts thereof, of base metal; base metal fittings for furniture, doors, saddlery and the like

1. Scope and Applicability

This PCR covers foreground production of finished base-metal locking and fitting hardware supplied at the factory gate: padlocks and locks; lock-incorporating clasps and clasp frames; keys and lock parts; and base-metal fittings for furniture, doors, saddlery, cabinets and comparable applications. It applies to mechanical products and to the metal-hardware portion of electromechanical products when electronic assemblies are separately identified.

The foreground boundary starts with purchased metal stock, castings, components, finishing chemicals, water, energy and packaging at the reporting organization's receiving gate. It ends with inspected and packaged finished hardware at the factory gate. Include forming, machining, cleaning, heat treatment, surface finishing, assembly, inspection and packaging when performed by the reporting organization or by a toll processor for the declared product.

Exclude complete doors, furniture, saddlery and access-control systems; powered door operators; stand-alone electronic control modules; installation, distribution, use, maintenance and end-of-life; and clothing or footwear clasps that do not incorporate a lock. An expanded study may add excluded life-cycle stages as separate processes without changing this gate-to-gate reference flow.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.fabricated-metal-products-except-machinery-and-equipment.padlocks-and-locks-of-base-metal-clasps-and-frames-with-clasps-incorporating-locks-of-b-058f6573
classification_refs	CPC 3.0: 42992 (exact classification context; mapping acceptance is governed separately)
covered_products	Finished base-metal padlocks, locks, lock-incorporating clasps and frames, keys, lock parts, and fittings for furniture, doors, saddlery, cabinets and similar articles
excluded_products	Complete host products; powered door operators; stand-alone electronic controls; non-locking clothing and footwear clasps; non-metal fittings; installation-only services
representative_product	A finished, saleable base-metal lock or fitting with its normally supplied integral parts and declared accessories
production_route	Purchased metal stock or cast components; forming and machining as applicable; optional heat treatment; optional cleaning and surface finishing; final assembly, inspection and packaging
market_state	Finished and packaged at the manufacturing gate; product subtype, principal alloy, finish, dimensions, security or performance class, accessories and packaging configuration declared

3. Reference Flow

Field	Value
What	Manufacture and make available finished base-metal locking or fitting hardware that performs the declared securing, access-control, fastening, motion-control or fitting function
How much	1 kg net mass of finished product at the factory gate; also declare product units per kg and mass per product unit
How well	Meets the declared product specification, performance or security class, dimensions, finish and quality acceptance criteria
How long or cycle	One completed manufacturing batch normalized to 1 kg finished product; no use-stage service period is represented
reference_flow_link	1 kg of the declared finished hardware product flow, excluding external packaging but including integral parts and normally supplied accessories

Field	Value
Reference amount	1 kg net finished product
Reference product flow	Padlocks and locks, of base metal, clasps and frames with clasps, incorporating locks, of base metal, keys and parts thereof, of base metal, base metal fittings for furniture, doors, saddlery and the like 5cf66c20-e740-4088-a8a8-4a1afca932b2
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	hardware subtype and intended function; principal metal and alloy grade; product mass and units per kg; dimensions; mechanical or electromechanical configuration; finish and coating system; performance, security or fire-rating class where applicable; included fasteners, keys and accessories; packaging configuration; production route and outsourced operations; manufacturing site and geography; reporting period; factory-gate condition

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_net_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh saleable finished hardware including integral parts and normally supplied accessories; exclude external packaging and report each packaging material separately.
unit_to_mass_conversion	product counts	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record product count and a representative weighed mass per product unit for each configuration; calculate units per kg without combining unlike configurations unless production-volume weighting is disclosed.
electricity_conversion	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve meter readings in kWh and convert to MJ with 1 kWh = 3.6 MJ; declare grid geography, voltage level and whether downstream losses are included.
water_mass_conversion	process water	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Prefer mass records; when water is metered by volume, use measured density and temperature or document the justified density conversion.
chemical_supply_state	finishing chemicals	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Report delivered solution or hydrate mass and declare concentration, hydration state and bath make-up versus replenishment; do not mix active-substance and supplied-product mass.

5. System Boundary

rule_id	Applies to	Rule	source_ids
sb_rule_1	foreground manufacturing	Include each operation that transforms the declared product before the factory gate, including controlled toll processing; disclose the manufacturing locations and the process sequence actually used.	us-epa-locking-devices-1995; ul-builders-hardware-pcr-2019
sb_rule_2	packaging	Record each packaging material as a separate input and disclose its type, composition, reuse status and disposition assumption; do not use a combined packaging-material row.	ul-builders-hardware-pcr-2019
sb_rule_3	excluded life-cycle stages	Keep distribution, installation, use, maintenance and end-of-life outside this gate-to-gate dataset. If an expanded study adds them, report them as separate processes and do not duplicate manufacturing inputs.	ul-builders-hardware-pcr-2019

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased metal stock, purchased castings or discrete components, finishing chemicals, process water, energy and packaging are received at the reporting organization's gate with supplier, grade, state and upstream dataset references declared.
starting_condition_role	Upstream product inputs to gate-to-gate manufacture of finished locking and fitting hardware
product_classification_scope	Finished base-metal locks, lock parts, keys, lock-incorporating clasps and base-metal fittings; classification references locate the category but do not replace product qualifiers.
recursive_input_rule	A purchased lock, key, fitting or lock component that would recurse into this same category is recorded once as a product input with its own upstream dataset; its prior manufacture is not reopened inside the foreground process.
upstream_dataset_requirement	Use supplier-specific datasets when available; otherwise use geographically and technologically representative upstream data and disclose alloy grade, recycled content, product state and delivery boundary.
disclosure	Declare which forming, heat-treatment, finishing and assembly operations are on-site or outsourced; metal and coating system; chemical supply state; energy geography; water source; waste destinations; packaging composition; reporting period; and any excluded operation.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
component_fabrication	Metal component forming and machining	conditional	Include when stock or castings are cut, bent, shaped, drilled, milled, tapped, die-cast, stamped or otherwise fabricated within the declared foreground or by a controlled toll processor.	foreground production	kg fabricated components sent to the next included operation
heat_treatment	Component heat treatment	conditional	Include when hardness, strength, spring properties or dimensional stability are achieved by thermal treatment before final assembly.	foreground conditioning	kg heat-treated components
surface_finishing	Cleaning and surface finishing	conditional	Include each on-site or controlled cleaning, buffing, plating, conversion-coating, powder-coating or lacquer route applied to the declared product.	foreground finishing	kg surface-finished components
assembly_packaging	Final assembly, inspection and packaging	required	Always include final product acceptance and factory-gate output; record assembly and each packaging material when present.	foreground production and gate output	1 kg net finished product

Process: Metal component forming and machining (component_fabrication)

Inputs

Product flows

Carbon-steel sheet stock (carbon_steel_sheet)

Record carbon-steel sheet only when it crosses the fabrication boundary for the declared product; declare grade, coating state, thickness and recycled content.

• Selected flow: Carbon-steel sheet
• Flow property / unit: Mass / kg
• Amount rule: measured purchased or issued mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Stainless-steel bar stock (stainless_steel_bar)

Record stainless-steel bar only for a product configuration that uses this stock form; declare grade, diameter or section, finish and recycled content.

• Selected flow: Stainless-steel bar
• Flow property / unit: Mass / kg
• Amount rule: measured purchased or issued mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Brass stock (brass_stock)

Record the public state-code-100 Brass flow, classified at CPC 41512 (Bars, rods and profiles, of copper), when copper-zinc alloy stock is fabricated into the declared hardware; declare alloy grade and stock form.

• Selected flow: Brass e422cfbf-5444-43ab-a68a-22be82e2ad47
• Flow property / unit: Mass / kg
• Amount rule: measured purchased or issued mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Zinc die-casting alloy (zinc_die_casting_alloy)

Record zinc die-casting alloy only when the declared components are die-cast; declare alloy designation, primary or secondary content and delivered ingot state.

• Selected flow: Zinc die-casting alloy
• Flow property / unit: Mass / kg
• Amount rule: measured furnace charge net of documented internal return metal
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Cutting fluid (cutting_fluid)

Record fresh make-up of the public state-code-100 Cutting Fluid flow, classified at CPC 35499 (Other chemical products n.e.c.), when consumed by machining; exclude recirculated fluid already inside the foreground loop.

• Selected flow: Cutting Fluid 576d250f-4f36-4385-939d-0f03b8f95a10
• Flow property / unit: Mass / kg
• Amount rule: purchased or tank-make-up mass less documented unused return
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Electricity for component fabrication (electricity_component)

Record electricity metered or allocated to forming, casting, machining, deburring and in-process material handling.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: process-metered electricity, converted from kWh when needed
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_energy

Waste flows

No waste input is prescribed. Returned waste accepted for remanufacture must be added as its own specific waste input.

Elementary flows

No elementary input is prescribed for this process.

Outputs

Product flows

No separate product output is prescribed; fabricated components remain inside the foreground product system.

Waste flows

Post-industrial steel machining scrap (steel_scrap)

Record segregated ferrous offcuts, chips and turnings that leave the process for recycling or treatment; declare contamination and destination.

• Selected flow: Post-industrial steel scrap c143745d-be4f-4d8f-b403-2dcbfe685349
• Flow property / unit: Mass / kg
• Amount rule: weighed scrap leaving the foreground process, net of internal remelt or direct reuse
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_materials
• Sources: us-epa-locking-devices-1995

Elementary flows

Direct emissions from fabrication must be added as separate measured elementary-flow rows when they cross the environmental boundary.

Process: Component heat treatment (heat_treatment)

Inputs

Product flows

Gaseous natural gas for heat treatment (natural_gas_heat)

Record this flow only when an on-site furnace burns natural gas for the declared components; declare reference conditions and fuel composition.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: metered natural-gas volume at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_heat_treatment
• Sources: us-epa-locking-devices-1995

Electricity for heat treatment (electricity_heat)

Record electricity for furnaces, controls, quenching equipment and heat-treatment auxiliaries when the route is included.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: process-metered electricity, converted from kWh when needed
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_heat_treatment

Waste flows

No waste input is prescribed.

Elementary flows

No elementary input is prescribed.

Outputs

Product flows

No separate product output is prescribed; heat-treated components remain inside the foreground product system.

Waste flows

Add each spent quench medium or treatment residue as a specific waste row if it leaves the foreground boundary.

Elementary flows

Direct fossil carbon dioxide from natural-gas combustion (co2_fossil_heat)

Record direct stack carbon dioxide calculated from measured fossil natural gas and supplier or fuel-analysis carbon data; do not include upstream grid emissions.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: calculated from measured fuel use, carbon content and documented oxidation assumption
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_heat_treatment

Process: Cleaning and surface finishing (surface_finishing)

Inputs

Product flows

Electricity for surface finishing (electricity_finish)

Record electricity for cleaning, buffing, plating rectifiers, pumps, ventilation, powder coating, curing or lacquer application that occurs in the declared route.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: process-metered electricity, converted from kWh when needed
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing
• Sources: us-epa-locking-devices-1995

Process water for cleaning and rinsing (process_water_finish)

Record make-up and rinse water that crosses the process boundary; exclude recirculated water until it leaves the loop.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered water supply converted to mass when necessary
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing
• Sources: us-epa-locking-devices-1995

Sodium hydroxide for alkaline cleaning or treatment (sodium_hydroxide_finish)

Record supplied sodium hydroxide only when it is consumed in the declared cleaning or wastewater-treatment route; declare solution concentration.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: delivered solution or solid make-up mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing

Hydrochloric acid for pickling or bath control (hydrochloric_acid_30_finish)

Record 30% supplied hydrochloric acid only when the declared route uses that supply concentration; other concentrations require a separately resolved flow and concentration disclosure.

• Selected flow: Hydrochloric acid (30%) 56414d25-a353-4d67-b362-87212ce6011d
• Flow property / unit: Mass / kg
• Amount rule: delivered 30% solution make-up mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing

Nickel sulfate for nickel-plating bath make-up (nickel_sulfate_finish)

Record nickel sulfate only for a nickel-plating route; declare hydration state, purity and supplied-product concentration.

• Selected flow: Nickel sulfate
• Flow property / unit: Mass / kg
• Amount rule: purchased bath make-up and replenishment mass attributable to the batch
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing
• Sources: us-epa-locking-devices-1995

Waste flows

No waste input is prescribed.

Elementary flows

No elementary input is prescribed.

Outputs

Product flows

No separate product output is prescribed; finished components remain inside the foreground product system.

Waste flows

Metal-finishing wastewater (metal_finishing_wastewater)

Record aqueous waste leaving cleaning, rinsing or plating for treatment; declare pH, principal dissolved metals, treatment destination and whether water is internally recycled.

• Selected flow: Metal-finishing wastewater
• Flow property / unit: Mass / kg
• Amount rule: metered or weighed wastewater sent to on-site or off-site treatment
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing
• Sources: us-epa-locking-devices-1995

Metal-hydroxide sludge from finishing-water treatment (metal_hydroxide_sludge)

Record dewatered sludge generated by treatment of metal-finishing wastewater; declare dry solids, principal metals, hazardous classification and destination.

• Selected flow: Metal-hydroxide sludge
• Flow property / unit: Mass / kg
• Amount rule: weighed wet sludge leaving the treatment process with dry-solids content retained
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_surface_finishing
• Sources: us-epa-locking-devices-1995

Elementary flows

Add each measured direct emission to air or water as a separate chemical-species flow. Do not use a combined emissions row.

Process: Final assembly, inspection and packaging (assembly_packaging)

Inputs

Product flows

Electricity for assembly and packaging (electricity_assembly)

Record electricity for assembly equipment, inspection, testing and packaging attributable to the declared product.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: process-metered electricity, converted from kWh when needed
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_packaging

Corrugated board boxes (corrugated_boxes)

Record formed corrugated boxes shipped with the product; declare board grade, recycled content and reuse status.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured packaging mass issued to shipped product
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_packaging
• Sources: ul-builders-hardware-pcr-2019

Polyethylene film packaging (polyethylene_film)

Record polyethylene film only when used in the declared packaging configuration; declare polymer grade, thickness and recycled content.

• Selected flow: Polyethylene 1ff32f1d-77ac-4a6f-b91c-67b08b13e55a
• Flow property / unit: Mass / kg
• Amount rule: measured film mass issued to shipped product
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_assembly_packaging
• Sources: ul-builders-hardware-pcr-2019

Waste flows

No waste input is prescribed.

Elementary flows

No elementary input is prescribed.

Outputs

Product flows

Finished base-metal locking or fitting hardware (finished_hardware)

Record only inspected, saleable product at the factory gate. Product units, unit mass, integral accessories and net-versus-packaged mass must be traceable.

• Selected flow: Padlocks and locks, of base metal, clasps and frames with clasps, incorporating locks, of base metal, keys and parts thereof, of base metal, base metal fittings for furniture, doors, saddlery and the like 5cf66c20-e740-4088-a8a8-4a1afca932b2
• Flow property / unit: Mass / kg
• Amount rule: normalize weighed net saleable output to exactly 1 kg reference product
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg net finished product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_assembly_packaging
• Sources: un-cpc-3-0-2025; ul-builders-hardware-pcr-2019

Waste flows

Record each rejected component and packaging scrap material separately when it leaves the foreground boundary.

Elementary flows

No direct elementary output is prescribed; add separately measured emissions when present.

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_rule_1	multiple products and production lines	Avoid allocation by subdividing meters, material issues, batch records and waste records to the declared product configuration wherever technically feasible.	ul-builders-hardware-pcr-2019
allocation_rule_2	residual shared burdens	When subdivision is not feasible, allocate shared manufacturing burdens by net product mass. A different physical relationship may be used only when documented and consistently applied.	ul-builders-hardware-pcr-2019
allocation_rule_3	metal scrap and recovered materials	Record scrap leaving the foreground as a waste output without an avoided-production credit inside this gate-to-gate dataset. Any recycling credit or substitution is reported separately in the downstream model with method and destination disclosed.	us-epa-locking-devices-1995

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_component_materials	component_fabrication	metal stock, cutting fluid and steel scrap	purchase, issue, return and scale records	material identity, grade, supplied mass, returned mass, internal recycle, scrap mass, batch id	reconcile purchasing and stores records with calibrated scales and batch travellers	kg	each batch; monthly reconciliation	declared representative reporting period or production campaign	each fabrication site and controlled toll processor	sum net inputs and outputs by product configuration, then normalize by net finished mass	invoices, certificates of analysis, scale calibration, material reconciliation and scrap transfer records
cp_component_energy	component_fabrication	electricity	meter or equipment energy log	meter start and end, kWh, production hours, product mass, allocation driver	use submeter data; if shared, allocate by documented equipment time or another physical driver	kWh and MJ	each batch or monthly	same period as product output	each fabrication site	subtract non-production baseload where evidenced, convert kWh to MJ, normalize by net finished mass	meter calibration, bills and operating logs
cp_heat_treatment	heat_treatment	natural gas, electricity and direct fossil CO2	fuel meter, electricity meter and fuel-analysis records	gas volume, reference conditions, kWh, carbon content, oxidation assumption, treated mass	read meters for included furnaces and retain supplier fuel specification or analysis	m3, kWh, MJ and kg	each heat-treatment campaign; monthly reconciliation	same period as treated output	each furnace site or controlled toll processor	allocate by treated mass only after subdivision by furnace campaign; calculate direct CO2 from collected fuel data	meter calibration, fuel invoices, supplier specification and furnace log
cp_surface_finishing	surface_finishing	electricity, water, each chemical, wastewater and sludge	meter, bath, purchasing and waste-transfer records	kWh, water volume or mass, chemical identity and concentration, make-up mass, wastewater mass, sludge wet mass and dry solids, batch id	reconcile meters and bath logs with purchase and waste manifests	kg, m3, kWh and MJ	each bath make-up and batch; monthly reconciliation	same period as finished components	each finishing line and wastewater-treatment unit	keep each chemical and waste stream separate; subtract documented internal recycle; normalize by net finished mass	meter calibration, bath analysis, SDS or certificate, invoices, manifests and sludge solids test
cp_assembly_packaging	assembly_packaging	electricity, each packaging material and finished product	meter, bill-of-materials, issue, count, scale and shipment records	kWh, packaging identity and mass, product count, net unit mass, rejected units, shipped mass, batch id	reconcile assembly and packaging issues with calibrated product scales and shipment records	kg, item, kWh and MJ	each batch; monthly reconciliation	declared representative reporting period or production campaign	each final assembly and packaging site	aggregate only equivalent product configurations; production-volume weight disclosed averages; normalize to 1 kg net finished product	scale and meter calibration, inspection release, bill of materials and shipment record

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize_mass	every inventory row	normalized amount = attributable row amount / net saleable product mass	attributable flow amount; net saleable product mass	flow amount per 1 kg net finished product
calc_count_mass	product count conversion	net product mass = accepted product count × representative weighed mass per unit; stratify unlike configurations before aggregation	accepted count; weighed unit mass; configuration id	kg net saleable product and units per kg	ul-builders-hardware-pcr-2019
calc_electricity_mj	electricity rows	electricity MJ = metered kWh × 3.6	metered kWh	MJ electricity
calc_water_mass	process-water row	water mass = metered volume × documented density at the declared condition	water volume; density; temperature	kg process water
calc_co2_fossil	direct natural-gas combustion	calculate fossil CO2 from measured gas volume, reference conditions, supplier or analysed carbon content and documented oxidation assumption; do not use upstream electricity emissions	gas volume; reference conditions; carbon content; oxidation assumption	kg carbon dioxide (fossil)
calc_material_balance	metal fabrication and finished output	reconcile purchased metal + same-category components = net finished metal + segregated metal scrap + other measured metal residues ± inventory change	metal inputs, product output, scrap, residues, work-in-progress change	disclosed metal mass-balance closure	us-epa-locking-devices-1995

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	product and all exchanges	Retain supplier identity, grade or formulation, product state, UUID resolution, and batch or lot linkage. Do not substitute a broader flow for an unresolved exact identity.	supplier specification, certificate, SDS, direct-read UUID audit and batch record
dq_measurement	mass, energy, water and count data	Use calibrated scales and meters suitable for the amount measured; document conversions, shared-meter allocation and excluded baseload.	calibration records, meter logs and calculation workbook
dq_temporal	foreground dataset	Cover the declared reporting period or production campaign, demonstrate temporal representativeness, and disclose material seasonal or production-volume variation.	production calendar, batch list and variance review
dq_completeness	process map and inventory	Reconcile product, metal and packaging records; add every route-specific chemical, fuel, waste and measured emission as its own atomic exchange even when not prelisted.	mass balance, purchase reconciliation, waste manifests and completeness checklist
dq_geography_technology	site and upstream data	Declare manufacturing geography, equipment route, outsourced operations, electricity mix, water source and waste destination; justify proxies for missing upstream data.	site description, supplier geography and data-quality assessment

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_rule_1	reference flow	Verify that net finished output equals 1 kg after normalization and that product subtype, unit mass, units per kg, alloy, finish, performance class, accessories, site, period and gate condition are declared.	un-cpc-3-0-2025; ul-builders-hardware-pcr-2019
validation_rule_2	process route	Every included process-map row must have collected inventory. Every omitted conditional process must have a documented non-applicability statement, including outsourced operations.	us-epa-locking-devices-1995
validation_rule_3	atomic flows and UUIDs	Verify one physical, chemical, waste or energy exchange per row, correct direction and flow type, compatible property and unit, and an exact state-100 UUID before final dataset publication.
validation_rule_4	metal mass balance	Investigate unexplained difference between metal inputs and net product, segregated scrap, other metal residues and work-in-progress change; disclose the reconciliation result.	us-epa-locking-devices-1995
validation_rule_5	finishing water and wastes	When surface finishing is included, reconcile supplied water with internally recycled water, wastewater, evaporation and carry-out, and reconcile treatment sludge with waste-transfer records without combining wastewater and sludge.	us-epa-locking-devices-1995
validation_rule_6	packaging	Confirm that each shipped packaging material is recorded separately and that net product mass excludes external packaging.	ul-builders-hardware-pcr-2019

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset after methodology review, exact flow resolution and dataset validation
downstream_use	foreground process models for base-metal locks, keys, lock parts and fittings; product LCAs and lifecycle models needing a factory-gate hardware input
allowed_use	Use for the declared product subtype, alloy, finish, production route, geography, technology and reporting period, or after a documented representativeness assessment.
excluded_use	Do not represent complete doors, furniture, saddlery or access-control systems; non-metal fittings; installation or use performance; or a materially different alloy, finish, security class or manufacturing route without adjustment.
required_metadata	canonical PCR id; product subtype and function; reference-flow UUID; net unit mass and units per kg; material composition; finish; performance class; included accessories; packaging; process map; site and geography; outsourced operations; reporting period; allocation; upstream data; unresolved-flow disposition
required_quality_disclosure	primary-data share; meter and scale coverage; temporal coverage; product grouping and weighting; mass-balance closure; UUID audit status; proxy data; excluded operations; water and waste reconciliation; uncertainty and known limitations
update_trigger	Reassess when product design, principal alloy, finish system, manufacturing route, site, supplier mix, energy mix, packaging, allocation method or annual inputs or outputs change materially, or when an unresolved exact flow is resolved.

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-2025	Official guidance (official_guidance)	United Nations Statistics Division. CPC Version 3.0 Structure, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-05; cached content SHA-256 sha256:5cd2c1c4890dd6be16af48e9bb940fed48efff9865f39ff15edaa921da25fb7c)	Exact CPC 42992 classification identity and hierarchy context
us-epa-locking-devices-1995	Official guidance (official_guidance)	Jendrucko, R. J.; Hurst, B. T.; Looby, G. P. Pollution Prevention Assessment for a Manufacturer of Locking Devices. U.S. EPA, EPA/600/S-95/013, August 1995. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=30003VJ0.TXT (retrieved 2026-09-05)	Locking-device process decomposition, metal stock, machining, cleaning, heat treatment, finishing, assembly, packaging, scrap and wastewater-treatment sludge pathways
ul-builders-hardware-pcr-2019	Standard (standard)	UL Environment. PCR for Building-Related Products and Services: Builders Hardware EPD Requirements, 2019. https://www.ul.com/sites/g/files/qbfpbp251/files/2019-07/ULE_PCR_Builder_Hardware_PartB_6-19-19.pdf (retrieved 2026-09-05)	Builder-hardware scope, product-unit and mass disclosure, system-boundary disclosure, manufacturing-location disclosure, packaging composition and pathway disclosure