Sinks, wash-basins, baths and other sanitary ware and parts thereof, of iron, steel, copper or aluminium

1. Scope and Applicability

This PCR covers factory-gate production of finished sinks, wash-basins, baths and other sanitary ware, and dedicated parts thereof, when the load-bearing or vessel body is made of iron, steel, copper or aluminium. It covers formed, fabricated or cast products supplied as complete fixtures or clearly identified dedicated parts.

Plastic and ceramic sanitary ware, taps and valves, cabinets, countertops, installation materials, building-site installation, use-stage water and cleaning, maintenance, demolition, and end-of-life treatment are excluded. Surface treatment, sound-deadening components and factory packaging are included when performed or added by the reporting manufacturer. A dataset shall declare the product form, complete-product or part status, principal metal and alloy grade, finish/coating, included accessories, manufacturing route, packaging state and factory gate.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.fabricated-metal-products-except-machinery-and-equipment.sinks-wash-basins-baths-and-other-sanitary-ware-and-parts-thereof-of-iron-steel-copper-0ba60283
classification_refs	CPC 3.0: 42911
covered_products	finished metal sinks, wash-basins, baths, sanitary vessels and dedicated parts made of iron, steel, copper or aluminium
excluded_products	plastic or ceramic sanitary ware; taps and valves; furniture and countertops; generic metal sheet, castings or parts not dedicated to sanitary ware
representative_product	factory-gate finished metal sink or wash-basin, including declared factory-applied finish, sound-deadening component and packaging
production_route	receipt of metal sheet or cast blank; cutting/forming or casting finishing; optional annealing and joining; washing; grinding/polishing; optional surface treatment and sound-deadening application; inspection; factory packaging
market_state	finished, inspected and uninstalled product or dedicated part at the manufacturing-site gate

3. Reference Flow

Field	Value
What	Provide the declared washing, holding, draining or bathing function of a finished metal sanitary fixture, or the declared function of a dedicated part.
How much	1 kg of finished product or dedicated part at the factory gate.
How well	Meets the declared dimensional, surface-finish, corrosion-resistance, leakage and product-specific performance specification.
How long or cycle	One factory-gate delivery; service life is outside this production-stage reference and shall be declared separately when used in comparative studies.
reference_flow_link	1 kg net finished metal sanitary ware or dedicated part, excluding detachable transport packaging.

Field	Value
Reference amount	1 kg
Reference product flow	Sinks, wash-basins, baths and other sanitary ware and parts thereof, of iron, steel, copper or aluminium 13e80a39-882f-40b2-a110-1221b48c3415
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	product type; complete fixture or dedicated part; principal metal and alloy grade; net product mass; finish and coating; manufacturing route; included accessories; packaging state; manufacturing site and geography; reporting period; factory gate

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

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use net dry mass of the finished product or dedicated part; exclude detachable transport packaging from reference mass and inventory that packaging separately.
metal_mass_measurement	metal inputs, product and metal scrap	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use calibrated receipt, issue, production and waste masses on a consistent dry basis; do not substitute nominal design mass for measured output without reconciliation.
electricity_energy	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve metered electricity and convert kWh to MJ using 1 kWh = 3.6 MJ; declare whether internal generation and losses are included.
gas_reference_conditions	natural gas and industrial oxygen	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	State pressure, temperature and dry/wet basis for reported gas volumes and apply one documented conversion basis consistently.
water_mass_conversion	process water and cleaning wastewater	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	When source records are volumetric, retain measured volume and convert to mass only with documented density and temperature assumptions.

5. System Boundary

The foreground boundary starts with purchased metal sheet, coil or cast sanitary-ware blank received at the manufacturing-site gate. It includes onsite cutting, forming, annealing when used, joining, washing, grinding/polishing, conditional surface preparation, application of declared sound-deadening components, inspection and factory packaging. Upstream production and delivery of purchased materials and energy shall be represented by supplier-specific or otherwise representative cradle-to-site datasets. Building-site installation, use, maintenance and end-of-life are outside this PCR.

Boundary Abstraction

Field	Value
declared_starting_condition	purchased metal sheet, coil or cast sanitary-ware blank received at the manufacturing-site gate
starting_condition_role	physical starting material for foreground forming, fabrication or finishing
product_classification_scope	finished iron, steel, copper or aluminium sanitary ware and dedicated parts; CPC 3.0 42911 is an exact classification reference
recursive_input_rule	a purchased unfinished or finished input already within this product category is recorded as a distinct product input with its supplied state and upstream dataset; it is not recursively remanufactured in the foreground model
upstream_dataset_requirement	supplier-specific cradle-to-site datasets are preferred for metal stock, cast blanks, consumables, energy and packaging; substitutes shall match material grade, product state, geography, technology and reporting period
disclosure	declare product type, complete-product or part status, metal/alloy, incoming form, route, finish/coating, accessories, packaging, site, geography, reporting period and cut-off decisions

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	all datasets	Include controlled onsite manufacture through inspection and factory packaging and stop at the manufacturing-site gate; exclude installation, use, maintenance and end-of-life.	elkay-undermount-sink-epd-2023
boundary_route_disclosure	forming and finishing route	Include only route-applicable atomic exchanges and explicitly disclose annealing, joining, washing, polishing, surface treatment and sound-deadening operations.	elkay-undermount-sink-epd-2023; usitc-drawn-stainless-steel-sinks-2024
boundary_upstream_inputs	purchased inputs	Link each purchased input to a cradle-to-site dataset matching its declared material, state and supply geography.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
metal_sanitary_ware_manufacturing	Metal sanitary ware forming, finishing and packing	required	Include the actual forming or casting-finishing route and every onsite finishing and packing step controlled by the reporting manufacturer.	foreground manufacturing	1 kg net finished metal sanitary ware or dedicated part

Process: Metal sanitary ware forming, finishing and packing (metal_sanitary_ware_manufacturing)

Inputs

Product flows

Further-worked stainless steel sheet (stainless_steel_sheet)

Record received stainless sheet when the declared steel route uses stainless flat-rolled stock.

• Selected flow: Flat-rolled products of stainless steel, further worked add37984-82d6-4c91-85e3-9911c0135944
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production order
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_inputs
• Sources: elkay-undermount-sink-epd-2023; usitc-drawn-stainless-steel-sinks-2024

Non-stainless steel sheet (non_stainless_steel_sheet)

Record one declared non-stainless steel sheet grade only when it is the product body material; its Tiangong identity remains unresolved.

• Selected flow: Non-stainless steel sheet
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production order
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_inputs
• Sources:

Cast-iron sanitary-ware blank (cast_iron_sanitary_ware_blank)

Record the received cast-iron vessel or part blank when the declared product follows a cast-iron finishing route; its Tiangong identity remains unresolved.

• Selected flow: Cast-iron sanitary-ware casting blank
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to finishing
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_inputs
• Sources:

Copper sheet (copper_sheet)

Record copper sheet only for the declared copper or copper-alloy sheet-forming route.

• Selected flow: Copper sheet 30cc5ca3-6198-4f82-8016-284f1b15d01b
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production order
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_inputs
• Sources:

Aluminium sheet (aluminium_sheet)

Record aluminium sheet only for the declared aluminium or aluminium-alloy sheet-forming route.

• Selected flow: aluminium sheet 4f197be4-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured mass issued to the production order
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_inputs
• Sources:

Purchased electricity (electricity)

Record metered purchased electricity used by forming, joining, finishing, washing, inspection and packing equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: metered electricity allocated to the production order or reporting line
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_inputs
• Sources: elkay-undermount-sink-epd-2023

Natural gas (natural_gas)

Record natural gas only when it is combusted onsite for annealing, heating, curing or another declared manufacturing operation.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: metered standard-volume consumption for route-applicable onsite combustion
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_inputs
• Sources:

Process water (process_water)

Record supplied process water used for washing, rinsing or route-applicable surface preparation.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: metered or tank-balance water crossing the foreground boundary, net of documented internal recirculation
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_utility_inputs
• Sources: elkay-undermount-sink-epd-2023

Industrial oxygen (industrial_oxygen)

Record industrial oxygen only when purchased oxygen is consumed by a declared cutting or joining operation.

• Selected flow: Industrial oxygen bd4b0f96-2090-4806-a648-335ab20ff401
• Flow property / unit: Volume / m3
• Amount rule: metered or cylinder-inventory standard volume consumed
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_process_consumables
• Sources:

Sodium hydroxide (sodium_hydroxide)

Record sodium hydroxide only when it is consumed in a declared onsite cleaning or surface-preparation bath.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: active sodium-hydroxide mass from purchase, issue and concentration records
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_consumables
• Sources:

Lubricating oil (lubricating_oil)

Record lubricating oil consumed as forming or drawing lubricant; exclude recovered oil recirculated internally.

• Selected flow: lubricating oil aec6f1a5-7b09-4704-870d-434d3ada0edd
• Flow property / unit: Mass / kg
• Amount rule: opening inventory plus receipts minus closing inventory and separately recorded recovery
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_consumables
• Sources: elkay-undermount-sink-epd-2023

Aluminium-oxide abrasive polishing media (aluminium_oxide_abrasive)

Record aluminium-oxide abrasive only when that specific abrasive is issued to grinding or polishing; its Tiangong identity remains unresolved.

• Selected flow: Aluminium-oxide abrasive polishing media
• Flow property / unit: Mass / kg
• Amount rule: issued mass minus separately documented recoverable return
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_consumables
• Sources: elkay-undermount-sink-epd-2023

Bitumen sound-deadening pad (bitumen_sound_deadening_pad)

Record the mass of factory-applied bitumen sound-deadening pads only when included in the delivered product; its Tiangong identity remains unresolved.

• Selected flow: Bitumen sound-deadening pad
• Flow property / unit: Mass / kg
• Amount rule: issued pad mass incorporated in accepted finished products
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_process_consumables
• Sources: elkay-undermount-sink-epd-2023

Corrugated board box (corrugated_board_box)

Record corrugated boxes supplied with the product at the factory gate.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured or specification-verified box mass packed with accepted products
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_inputs
• Sources: elkay-undermount-sink-epd-2023

Paper instruction insert (paper_instruction_insert)

Record printed paper instructions supplied inside the product packaging.

• Selected flow: Packaging, paper insert b4681b7b-ff95-4df8-804a-fff06aa3c3aa
• Flow property / unit: Mass / kg
• Amount rule: measured or specification-verified insert mass packed with accepted products
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_inputs
• Sources: elkay-undermount-sink-epd-2023

PET product label (pet_product_label)

Record a polyethylene-terephthalate product label only when supplied with the factory packaging; its Tiangong identity remains unresolved.

• Selected flow: Polyethylene-terephthalate product label
• Flow property / unit: Mass / kg
• Amount rule: measured or specification-verified label mass packed with accepted products
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_inputs
• Sources: elkay-undermount-sink-epd-2023

Waste flows

No waste input is prescribed. Record any externally received waste only as a separate, reviewed route-specific addition.

Elementary flows

No elementary input is prescribed; product water and purchased gases are recorded above as product flows.

Outputs

Product flows

Finished metal sanitary ware or dedicated part (finished_metal_sanitary_ware)

Record accepted finished output at the declared factory gate on the net-product mass basis.

• Selected flow: Sinks, wash-basins, baths and other sanitary ware and parts thereof, of iron, steel, copper or aluminium 13e80a39-882f-40b2-a110-1221b48c3415
• Flow property / unit: Mass / kg
• Amount rule: measured net mass of accepted finished output
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_product_output
• Sources:

Waste flows

Post-industrial steel scrap (post_industrial_steel_scrap)

Record segregated steel offcuts, trimmings, chips and rejected steel bodies leaving the foreground boundary.

• Selected flow: Post-industrial steel scrap c143745d-be4f-4d8f-b403-2dcbfe685349
• Flow property / unit: Mass / kg
• Amount rule: measured outgoing mass by declared steel grade and recovery destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources: usitc-drawn-stainless-steel-sinks-2024

Cast-iron scrap (cast_iron_scrap)

Record cast-iron finishing scrap and rejected cast-iron bodies separately from steel scrap; its Tiangong identity remains unresolved.

• Selected flow: Cast-iron scrap
• Flow property / unit: Mass / kg
• Amount rule: measured outgoing mass and declared recovery destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Copper scrap (copper_scrap)

Record segregated copper offcuts, trimmings and rejected copper bodies leaving the foreground boundary.

• Selected flow: Copper Scrap 4fbbb5f1-560a-4052-ba0c-652c5dfc282e
• Flow property / unit: Mass / kg
• Amount rule: measured outgoing mass and declared recovery destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Aluminium scrap (aluminium_scrap)

Record segregated aluminium offcuts, trimmings and rejected aluminium bodies leaving the foreground boundary.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: measured outgoing mass and declared recovery destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources:

Cleaning wastewater (cleaning_wastewater)

Record wastewater from washing, rinsing and route-applicable surface preparation when it leaves the foreground process for onsite or offsite treatment.

• Selected flow: Wastewater from cleaning f0402393-e82c-47e8-9cd8-a486c97f3e89
• Flow property / unit: Mass / kg
• Amount rule: metered or tank-balance mass discharged, with recirculated water excluded and treatment state declared
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste_outputs
• Sources: elkay-undermount-sink-epd-2023

Elementary flows

Fossil carbon dioxide from onsite combustion (carbon_dioxide_fossil)

Record direct fossil carbon dioxide measured at the stack when natural gas or another fossil fuel is combusted within the declared foreground boundary; upstream electricity emissions are excluded from this row.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: directly monitored fossil carbon-dioxide mass attributed to the production order; otherwise a separately sourced calculation rule is required before using a calculated value
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_direct_emissions
• Sources:

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision_first	shared forming, finishing and packing operations	Avoid allocation by sub-metering production lines, products, campaigns and waste streams wherever practical.
allocation_physical_causality	residual shared inputs and outputs	Use a documented physical causal driver such as machine time, metered energy, processed metal mass or counted packed units; use output mass only when no more causal driver is available and disclose the sensitivity.
allocation_scrap_at_gate	metal scrap outputs	Report scrap mass and state at the foreground gate without avoided-burden or substitution credit in the foreground inventory; downstream recycling scenarios belong outside this unit-process result.
allocation_multiple_products	complete fixtures and dedicated parts made in one reporting system	Keep separately measured product families separate; when inseparable, allocate by the documented causal driver and report the allocation factor for each reference product.

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_inputs	metal_sanitary_ware_manufacturing	principal metal input	purchase, receipt and production-issue records	material id; alloy/grade; form; supplier; receipt mass; issued mass; return mass; production order; date	calibrated scale plus inventory reconciliation	kg	per receipt and production order	representative continuous 12-month period	all controlled manufacturing lines	sum net issued mass by material and route, then allocate and normalize to accepted output	calibration record; supplier certificate; stock reconciliation
cp_utility_inputs	metal_sanitary_ware_manufacturing	electricity, gas and process water	meter and invoice records	meter id; energy or volume; start/end readings; reference conditions; process line; reporting period	calibrated submeter preferred; invoice reconciliation for shared supply	MJ; m3; kg	monthly or finer	representative continuous 12-month period	all controlled manufacturing and shared auxiliary systems	subtract documented non-production use, allocate by causal driver and normalize to accepted output	meter calibration; invoice; reconciliation
cp_process_consumables	metal_sanitary_ware_manufacturing	oxygen, cleaning chemical, lubricant, abrasive and pad	purchase, issue, return and concentration records	material id; composition; concentration; issued mass/volume; returned mass; production order; date	inventory balance and batch/line issue record	kg; m3	per batch or monthly	representative continuous 12-month period	all route-applicable onsite operations	opening stock plus receipts minus closing stock and recoverable returns; convert solution to active mass where required	inventory reconciliation; composition certificate; batch record
cp_packaging_inputs	metal_sanitary_ware_manufacturing	factory packaging	packaging specification and packing records	component id; material; unit mass; packed unit count; product family; date	verified component mass multiplied by packed units, checked against purchases	kg	per packaging specification and monthly	representative continuous 12-month period	final packing line	aggregate each atomic component separately and normalize to accepted net product mass	scale check; packaging specification; purchase reconciliation
cp_product_output	metal_sanitary_ware_manufacturing	accepted finished product	final inspection and dispatch records	product id; complete/part status; metal/alloy; finish; net mass; accepted quantity; rejection quantity; date	calibrated product scale or verified bill of mass reconciled to scale checks	kg	per batch or dispatch lot	representative continuous 12-month period	all controlled output lines	sum accepted net mass by product family; exclude detachable packaging	calibration record; inspection release; dispatch reconciliation
cp_waste_outputs	metal_sanitary_ware_manufacturing	metal scrap and cleaning wastewater	waste scale, container, meter and transfer records	waste id; material/grade; mass or volume; treatment state; destination; date; production line	calibrated scale, wastewater meter or tank balance	kg; m3	per shipment or monthly	representative continuous 12-month period	all controlled operations and onsite pretreatment	segregate atomic waste streams, subtract documented internal recirculation and normalize to accepted output	weigh ticket; meter calibration; transfer note; water balance
cp_direct_emissions	metal_sanitary_ware_manufacturing	direct fossil carbon dioxide	continuous or periodic stack-monitoring records	source id; fossil fuel; concentration or mass rate; gas flow; operating time; production order; date	calibrated direct stack measurement	kg	continuous or test campaign matched to production	representative continuous 12-month period or justified campaign	all onsite fossil-combustion sources within the foreground boundary	integrate measured mass, attribute by causal operating record and normalize to accepted output	monitor calibration; test report; operating log

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_to_reference_mass	every inventory exchange	exchange quantity divided by accepted net product mass	atomic exchange total; cp_product_output accepted net mass	exchange per 1 kg reference product
convert_electricity_to_mj	electricity records in kWh	MJ = kWh × 3.6	metered kWh	MJ electricity
calculate_active_naoh	sodium-hydroxide solution	active NaOH mass = solution mass × verified mass fraction	issued solution mass; supplier or bath concentration	kg active NaOH
reconcile_metal_mass	each declared metal route	received/issued metal = accepted product metal + segregated metal scrap + measured stock change + quantified residual loss	cp_material_inputs; cp_product_output; cp_waste_outputs	material-specific mass-balance closure
allocate_shared_operations	shared utilities and consumables	shared total × documented causal allocation factor, followed by normalization to reference mass	meter or inventory total; causal driver by product; accepted output mass	allocated exchange per 1 kg reference product

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Product records shall identify product type, complete/part status, principal metal, alloy/grade, finish/coating, included accessories and net mass.	product specification; bill of materials; inspection release
dq_temporal_coverage	all foreground records	Use a continuous representative 12-month period; shorter campaigns require seasonality, maintenance and product-mix justification.	dated record inventory and production schedule
dq_metering	mass, energy, gas and water	Instruments shall have valid calibration or documented reconciliation to invoices and stock balances.	calibration certificates and reconciliation
dq_completeness	process inventory	Reconcile purchased inputs, accepted outputs, scrap, wastewater, stock change and direct emissions; document every excluded exchange and cut-off decision.	signed mass/energy/water balance and exclusion register
dq_route_specificity	conditional exchanges	Mark a conditional row not applicable only with evidence that the operation or material was absent from the declared route.	process flow diagram; production order; material issue record
dq_upstream_match	background datasets	Supplier or substitute datasets shall match material grade/state, geography, technology and time; disclose mismatches and sensitivity for major metal inputs.	supplier EPD/dataset metadata and data-quality assessment

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_reference_flow	reference product	Confirm exactly 1 kg net accepted finished product and exclude detachable packaging from reference mass.
validation_identity_qualifiers	dataset identity	Reject a data package missing product type, complete/part status, principal metal/alloy, finish/coating, manufacturing route, packaging state, site, geography, period or factory gate.	un-cpc-3-0-structure-2025
validation_atomic_inventory	all inventory rows	Confirm that every selected flow is one atomic exchange and that conditional rows have explicit applicability evidence.
validation_metal_balance	each metal route	Investigate any unreconciled difference among issued metal, accepted product metal, segregated scrap, stock change and quantified residual loss.
validation_utility_and_waste_balance	water, energy and waste	Cross-check meters, invoices, tank balances, waste transfers and accepted output over the same reporting period and site scope.	elkay-undermount-sink-epd-2023
validation_uuid_and_units	UUID-bearing flows	Confirm public state-100 identity, flow type, classification, property, unit group and reference unit before publication; unresolved rows remain explicit review items.
validation_source_use	external evidence	Use the listed sources only for the stated process or classification support; do not infer empirical ranges from a single product case.

10. Published Dataset Profile

Field	Value
dataset_role	unit_process
downstream_use	secondary_dataset; background_dataset
allowed_use	factory-gate modelling of metal sanitary ware or dedicated parts with matching product type, principal metal/alloy, manufacturing route, finish, packaging state, geography and period
excluded_use	plastic or ceramic sanitary ware; taps and valves; uninstalled product service; building installation; use-stage water and cleaning; maintenance; demolition; end-of-life; unmatched metal grades or routes without sensitivity review
required_metadata	reference-flow qualifiers; process map; site and geography; reporting period; metal/alloy and incoming form; finish/coating; accessories; packaging state; allocation; cut-offs; UUID resolution; foreground data coverage
required_quality_disclosure	temporal and site coverage; measurement and calibration; mass, energy and water reconciliation; conditional-route evidence; allocation factors; upstream dataset matches; unresolved UUIDs and range-evidence needs
update_trigger	material change in product family, principal metal/alloy, forming or casting route, joining/annealing, finish/coating, sound treatment, packaging, site, energy system, allocation, upstream datasets or data quality

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 product classification identity and placement of CPC 42911
elkay-undermount-sink-epd-2023	dataset	Elkay, Environmental Product Declaration: Stainless Steel Undermount Sinks, 2023. https://zurnelkay.com/getattachment/de14ecc9-75c1-47cb-b9c7-efecf00e1d5f/102-1_EPD_Elkay-Undermount-Sink.pdf?lang=en-US	representative manufacturing sequence; inclusion of washing, energy, water, manufacturing waste, sound-deadening pads and factory packaging; one-case packaging evidence only
usitc-drawn-stainless-steel-sinks-2024	official_guidance	U.S. International Trade Commission, Drawn Stainless Steel Sinks from China, Publication 5489, January 2024. https://www.usitc.gov/sites/default/files/publications/701_731/pub5489_0.pdf	starting material and manufacturing process decomposition for cutting, drawing, annealing, welding, grinding and buffing