Auxiliary plant for use with boilers; condensers for steam or other vapour power units

1. Scope and Applicability

This PCR applies to complete boiler auxiliary plant and complete condensers for steam or other vapour power units supplied at the manufacturer's factory gate. Covered equipment includes economisers, superheaters, soot removers, gas recoverers, steam-turbine condensers, vent-steam condensers, and comparable complete heat-exchange or boiler-support assemblies within the reviewed product boundary. Product-specific pressure, temperature, duty, materials, cooling medium, and conformity requirements must be declared.

The PCR excludes steam or other vapour-generating boilers, central-heating boilers, nuclear reactors, steam turbines, valves, standalone pumps or fans, and separately supplied replacement parts. Installation, commissioning at the customer site, operation, maintenance, retrofit, and end-of-life are outside the default cradle-to-gate boundary. The official CPC structure and HS heading establish the distinction between complete equipment, boilers, and parts (un-cpc-3-0-2025, un-hs-2017-heading-8404).

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.fabricated-metal-products-except-machinery-and-equipment.auxiliary-plant-for-use-with-boilers-condensers-for-steam-or-other-vapour-power-units
classification_refs	CPC 3.0: 42330, exact
covered_products	Complete boiler auxiliary plant; complete condensers for steam or other vapour power units
excluded_products	Boilers; nuclear reactors; steam turbines; valves; standalone pumps and fans; separately supplied parts; site installation services
representative_product	A factory-accepted economiser, superheater, soot-removal or gas-recovery assembly, or a steam-power-unit condenser
production_route	Receipt of specified materials and bought-in components; cutting, forming and machining; permanent joining and assembly; conditional cleaning, heat treatment and protective packing; inspection, NDT and required pressure or leak testing
market_state	Complete factory-gate equipment, identified by model or project designation, net mass, technical specification and acceptance status; removable transport packaging is reported separately

The professional Chinese category title follows the official Chinese tariff terms for boiler auxiliary equipment and condensers for steam or other vapour power units (china-mofcom-hs-8404-nomenclature).

3. Reference Flow

Field	Value
What	Provision of complete boiler auxiliary plant or a complete condenser for a steam or other vapour power unit
How much	1 kg net mass of factory-accepted equipment at the manufacturer's gate
How well	Meets the declared purchaser specification, design code or conformity regime, inspection status and factory acceptance criteria
How long or cycle	Cradle-to-gate product output; design service life is declared as metadata but does not change the 1 kg normalization
reference_flow_link	1 kg of the reference product output row reference_product_output

Field	Value
Reference amount	1
Reference product flow	Auxiliary plant for use with boilers, condensers for steam or other vapour power units 44b3e5f4-4272-4369-8001-a48717bf1dfe
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 subtype and equipment designation; project or model; pressure-bearing status; design code and conformity regime; maximum allowable pressure and temperature where applicable; thermal duty; principal material grades; tube material and dimensions where applicable; cooling-medium quality where applicable; manufacturing site and geography; factory-acceptance and test regime; net product mass; removable-packaging exclusion; data period

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	Normalize to the measured net mass of complete factory-accepted equipment. Exclude removable transport packaging from reference product mass and report its inputs separately.
electricity_energy_conversion	manufacturing_electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200b9a66	MJ	Preserve metered electricity before conversion; convert kWh to MJ using 1 kWh = 3.6 MJ and disclose grid geography, voltage and loss boundary.
gas_volume_conditions	natural_gas and industrial_oxygen	Volume 93a60a56-a3c8-22da-a746-0800200c9a66	m3	State the reference temperature and pressure for each gas volume. Do not convert natural-gas volume to energy without a documented net calorific value applicable to the supplied gas.
water_mass_basis	process_water and hydrostatic_test_wastewater	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use measured mass or convert measured volume with a documented density and retain the original volume, density and conditions.
material_mass_reconciliation	material inputs, reference product and metal scrap	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Reconcile received material, net product, returned material, measured scrap and inventory change over the same production order and period; explain unreconciled differences.

5. System Boundary

The default boundary begins when purchased materials, bought-in components, energy carriers, water and process consumables cross the manufacturing-site boundary. It includes material preparation, forming and machining, permanent joining, assembly, conditional cleaning and heat treatment, inspection, NDT, factory pressure or leak testing, and protective packing. It ends with accepted complete equipment at the factory gate. The process sequence and pressure-equipment quality controls are supported by official pressure-equipment and NDT guidance (uk-pressure-equipment-guidance-2025, uk-hse-ndt-pressure-equipment, uk-hse-pressure-testing-gs4).

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased plates, tubes, welding consumables, bought-in components, gases, energy, water and packaging materials at the manufacturing-site gate, with specification, mass and supplier geography declared
starting_condition_role	Upstream product inputs with complete upstream datasets; no unreported embedded production is treated as foreground
product_classification_scope	Complete equipment within the CPC 42330 semantic boundary; boilers, turbines and separately supplied parts remain outside this PCR
recursive_input_rule	A purchased complete CPC 42330 unit incorporated into a larger deliverable is recorded once as a product input with an upstream dataset and is not recursively decomposed by this foreground process
upstream_dataset_requirement	Each purchased material, component, fuel, gas, electricity supply, water supply and packaging input requires a geographically and technologically representative upstream dataset or an explicit data gap
disclosure	Declare manufacturing route, outsourced steps, cut-offs, site and period, material grades, product subtype, test route, packaging boundary, allocation drivers and any installation or use stages intentionally added

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	foreground manufacturing	Include all in-factory preparation, joining, assembly, conditioning, inspection, testing and packing attributable to the accepted product; exclude customer-site installation and use unless separately modelled and disclosed.	uk-pressure-equipment-guidance-2025, uk-hse-ndt-pressure-equipment
boundary_pressure_controls	pressure-bearing products	Include the actual permanent-joining qualification, NDT, final inspection and pressure or leak-test activities required by the declared design code or conformity regime.	uk-pressure-equipment-guidance-2025, uk-hse-ndt-pressure-equipment, uk-hse-pressure-testing-gs4
boundary_recursive_equipment	same-category purchased equipment	Stop recursive foreground tracing at the purchased complete equipment boundary and require a separate upstream dataset for that input.
boundary_direct_emissions	site energy and treatment	Report only direct site emissions in this foreground inventory; keep upstream emissions within the corresponding purchased-input datasets.

6. Process Inventory Structure

The integrated process avoids artificial internal intermediates while retaining operation-level records. It covers the common factory route described above; each conditional row is included only when that exact exchange occurs. Steam-condenser type, tube selection and cooling-medium conditions remain product-specific qualifiers (doosan-steam-condensers-heat-exchangers).

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
equipment_manufacturing_and_acceptance	Equipment fabrication, assembly, testing and factory acceptance	required	Always required for complete factory-gate equipment; individual route-specific exchanges below remain conditional	foreground production	1 kg net mass of accepted reference product

Process: Equipment fabrication, assembly, testing and factory acceptance (equipment_manufacturing_and_acceptance)

Inputs

Product flows

Carbon-steel pressure-equipment plate (carbon_steel_pressure_plate)

Record carbon or non-alloy steel plate entering fabrication when it appears in the product bill of materials. Grade, delivery state, dimensions, certification and supplier geography are mandatory qualifiers; the Tiangong UUID remains unresolved because no exact audited candidate was found.

• Selected flow: Carbon-steel pressure-equipment plate
• Flow property / unit: Mass / kg
• Amount rule: measured consumed mass from receiving, issue, return and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net accepted reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records
• Sources: uk-hse-ndt-pressure-equipment

Stainless-steel pressure-equipment plate (stainless_steel_pressure_plate)

Record stainless-steel plate only when it appears in the product bill of materials. Alloy grade, delivery state, dimensions, certification and supplier geography are mandatory qualifiers; the Tiangong UUID remains unresolved because no exact audited candidate was found.

• Selected flow: Stainless-steel pressure-equipment plate
• Flow property / unit: Mass / kg
• Amount rule: measured consumed mass from receiving, issue, return and inventory records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net accepted reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records
• Sources: uk-hse-ndt-pressure-equipment

Copper tubing for heat-transfer surfaces (copper_tubing)

Record copper tubing only for products whose declared tube material is copper or copper alloy. Grade, dimensions, supplier and cooling-medium compatibility are retained with the foreground record.

• Selected flow: Copper tubing 0d80f4b8-8f26-4eee-8b81-df499c4c9dff
• Flow property / unit: Mass / kg
• Amount rule: measured consumed tube mass from bill-of-material, issue and return records
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net accepted reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records
• Sources: doosan-steam-condensers-heat-exchangers

Purchased electricity (manufacturing_electricity)

Record metered electricity attributable to cutting, forming, machining, joining, assembly, ventilation, inspection, testing and packing. Facility overhead is included only through the documented allocation rule.

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

Industrial oxygen (industrial_oxygen)

Record purchased industrial oxygen only when it crosses the foreground boundary for oxy-fuel cutting or another documented manufacturing operation. Do not include oxygen generated inside an upstream supplied-service dataset as a separate input.

• Selected flow: Industrial oxygen bd4b0f96-2090-4806-a648-335ab20ff401
• Flow property / unit: Volume / m3
• Amount rule: metered or supplier-invoiced oxygen volume at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net accepted reference product for products using purchased oxygen
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_and_gas_records

Flux-cored welding wire (flux_cored_welding_wire)

Record flux-cored welding wire only when that consumable route is used. Retain classification, alloy, diameter, shielding arrangement, welding procedure and returned or discarded consumable quantities.

• Selected flow: Flux Cored Wire 1b74a576-06e0-4764-97ce-11a73f8a4752
• Flow property / unit: Mass / kg
• Amount rule: issued mass less unopened returns, reconciled to welding procedure and production order
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net accepted reference product for the flux-cored-wire route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records
• Sources: uk-pressure-equipment-guidance-2025, uk-hse-ndt-pressure-equipment

Natural gas (natural_gas)

Record gaseous natural gas only when combusted on site for heat treatment, drying or a documented fuel-gas manufacturing operation. Keep supply geography, composition, net calorific value and reference conditions with the record.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: metered or supplier-invoiced volume attributable to the production order
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net accepted reference product for the on-site gas-combustion route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_and_gas_records

Process water (process_water)

Record water supplied for cleaning, flushing or hydrostatic testing when it crosses the manufacturing boundary. Declare source, quality, reuse, test volume, additives and measurement basis.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: measured make-up water entering cleaning and test operations, net of documented reuse
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted reference product for water-using operations
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_records
• Sources: uk-hse-ndt-pressure-equipment, uk-hse-pressure-testing-gs4

Sodium hydroxide for alkaline cleaning (sodium_hydroxide)

Record sodium hydroxide only when a documented alkaline cleaning bath or solution is used. Report active sodium-hydroxide mass, supplied concentration, make-up and bath-disposal boundary.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: active sodium-hydroxide mass calculated from weighed solution and supplier concentration
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net accepted reference product for the alkaline-cleaning route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_and_packaging_records

Kiln-dried sawn coniferous timber (softwood_packaging)

Record kiln-dried coniferous sawn timber only when used in a product-specific transport frame, skid or crate delivered with the product. Declare treatment, moisture, reuse and recovery arrangements.

• Selected flow: Kiln-dried sawn coniferous timber, at mill 50904047-e5b0-4110-990a-53751d250267
• Flow property / unit: Mass / kg
• Amount rule: weighed or supplier-documented timber installed in delivered transport packaging
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net accepted reference product when timber packaging is supplied
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records

Low-density polyethylene protective film (ldpe_packaging_film)

Record low-density polyethylene film only when used to wrap or protect the delivered equipment. Retain thickness, recycled content and supplier information.

• Selected flow: Low-density polyethylene foil (PE-LD) 2cecd3a7-d90e-44b4-aec5-1d9dfb907477
• Flow property / unit: Mass / kg
• Amount rule: weighed or supplier-documented film applied to delivered equipment
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net accepted reference product when LDPE film is supplied
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_and_packaging_records

Waste flows

No waste flow is expected as an input to the integrated manufacturing process.

Elementary flows

No elementary flow is expected as an input to the integrated manufacturing process.

Outputs

Product flows

Accepted reference equipment (reference_product_output)

The output is the complete accepted item within this PCR boundary. Removable transport packaging is excluded from its net mass even when packaging burdens are included in the foreground process.

• Selected flow: Auxiliary plant for use with boilers, condensers for steam or other vapour power units 44b3e5f4-4272-4369-8001-a48717bf1dfe
• Flow property / unit: Mass / kg
• Amount rule: fixed reference output of 1 kg net accepted equipment
• Value mode: Fixed value (fixed_value)
• Specificity: Generic (generic)
• Normalization basis: 1 kg net accepted reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Identity reference (identity_reference)
• Sources: un-cpc-3-0-2025

Waste flows

Steel fabrication scrap (steel_scrap)

Record measured ferrous plate, section and machining offcuts leaving the process as scrap. Keep grade segregation, contamination, internal return, external receiver and recycling or treatment route with the record.

• Selected flow: Scrap steel c3fc5605-baa3-4b25-9934-ecf7fcbc72da
• Flow property / unit: Mass / kg
• Amount rule: measured scrap transferred off site after subtracting material returned to stock or reused in the same product
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output_and_waste_records

Hydrostatic-test wastewater (hydrostatic_test_wastewater)

Record water leaving cleaning, flushing or hydrostatic testing as wastewater only when it is discharged or transferred for treatment. Declare origin, additives, contamination, reuse, destination and treatment route.

• Selected flow: Wastewater d2d44ce1-c0f4-461d-9413-f4b33e0d200f
• Flow property / unit: Mass / kg
• Amount rule: measured water discharged or transferred after subtracting documented reuse and retained water
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted reference product for water-using test or cleaning routes
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_records
• Sources: uk-hse-ndt-pressure-equipment, uk-hse-pressure-testing-gs4

Elementary flows

Fossil carbon dioxide from on-site natural-gas combustion (carbon_dioxide_fossil)

Record only direct fossil carbon dioxide from natural gas combusted inside the foreground site. Exclude upstream gas-supply and purchased-electricity emissions.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: calculated from collected natural-gas volume and a documented site- and period-specific emission factor or carbon balance
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net accepted reference product for the on-site gas-combustion route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_direct_combustion_records

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision_first	product orders and distinguishable operations	Avoid allocation by submetering and assigning material issues, machine records, test records, scrap and packaging directly to the production order.
allocation_shared_operations	shared electricity, gas, water and common operations	When direct assignment is not possible, use a documented physical driver that reflects causation, such as measured machine energy, machine hours, weld length, test volume or net processed mass; do not use revenue unless no defensible physical driver exists.
allocation_scrap	steel scrap	Treat measured scrap as a waste output at the point it leaves the foreground process. Do not credit avoided primary metal in the foreground result; model receiving recycling or treatment separately under the chosen background convention.
allocation_packaging	product-specific timber and film	Assign product-specific packaging directly to the delivered order; allocate shared packaging by measured packaging mass or net packaged product mass.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_material_and_packaging_records	equipment_manufacturing_and_acceptance	metal inputs, welding wire, cleaning chemical, timber and LDPE film	receiving tickets, certified material records, bill of materials, stores issues and returns, supplier invoices	production_order; material_code; grade_or_formula; supplied_mass; concentration; issued_mass; returned_mass; packaging_mass; supplier; geography	reconcile certified bill-of-material and stores transactions to the accepted production order	kg and mass fraction	each issue and return; aggregate per accepted order	full manufacturing period for the order	all owned and contracted operations included in the boundary	consumed mass = received or issued mass minus verified return, with concentration conversion where applicable; normalize by accepted net product mass	material certificate, invoice, calibrated scale record, stores ledger and approved bill of materials
cp_energy_and_gas_records	equipment_manufacturing_and_acceptance	electricity, industrial oxygen and natural gas	submeters, utility meters, cylinder or bulk-gas invoices and production logs	timestamp; meter_start; meter_end; unit; production_order; machine_hours; gas_volume; reference_temperature; reference_pressure; grid_or_supplier	direct submetering preferred; otherwise allocate contemporaneous meter totals with the approved physical driver	kWh, MJ and m3	each shift or batch; monthly utility reconciliation	representative order period, with at least one complete production cycle	manufacturing site and declared contracted operations	subtract unrelated loads, apply documented allocation, convert electricity with 3.6 MJ/kWh and normalize by accepted net product mass	meter calibration, invoices, shift logs and allocation worksheet
cp_water_records	equipment_manufacturing_and_acceptance	process water and hydrostatic-test wastewater	water meters, test sheets, tank-volume records, discharge manifests and reuse logs	source; input_volume_or_mass; test_volume; reused_volume_or_mass; retained_water; discharged_volume_or_mass; density; additives; destination	meter or weigh each fill, reuse and discharge; reconcile water balance by test campaign	kg and m3	each cleaning or test campaign	full manufacturing and acceptance-test period	all water-using operations in the foreground boundary	convert volume with documented density where needed; input = reuse + discharge + retained water + explained loss; normalize by accepted net product mass	calibrated meter, signed test sheet, discharge record and balance check
cp_output_and_waste_records	equipment_manufacturing_and_acceptance	reference product and steel scrap	final weighing, acceptance certificate, scrap scales, stock-return notes and waste transfer records	production_order; accepted_product_mass; packaging_mass; scrap_mass; returned_to_stock_mass; receiver; treatment_route	weigh accepted equipment without removable packaging and weigh each scrap transfer	kg	each accepted product and scrap transfer	full production order	manufacturing site and included contractors	sum accepted net product and attributable scrap over the same order; normalize all flows to 1 kg product	calibrated scale certificate, acceptance record, scrap ticket and receiver documentation
cp_direct_combustion_records	equipment_manufacturing_and_acceptance	fossil carbon dioxide	natural-gas records, supplier fuel properties, approved factor or carbon-balance worksheet	gas_volume; reference_conditions; net_calorific_value_if_used; carbon_content_or_co2_factor; factor_source; oxidation_assumption; production_order	calculate only direct site CO2 from collected gas consumption and a cited factor applicable to the site and period	kg CO2 and m3 gas	each reporting period containing on-site gas combustion	same period as gas consumption	combustion inside foreground site only	CO2 = attributable gas quantity multiplied by documented applicable factor, then normalized by accepted net product mass	gas meter, supplier specification, factor citation and calculation review

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize_reference_mass	all inventory rows	normalized amount = attributable order amount / accepted net product mass	attributable flow amount; accepted product mass excluding removable packaging	amount per 1 kg reference product
calc_electricity_mj	manufacturing_electricity	electricity_MJ = retained_metered_kWh × 3.6	metered kWh	MJ electricity
calc_active_sodium_hydroxide	sodium_hydroxide	active NaOH mass = supplied solution mass × supplier-certified NaOH mass fraction	solution mass; NaOH mass fraction	kg active sodium hydroxide
calc_water_mass	process_water, hydrostatic_test_wastewater	water mass = measured volume × documented density at stated conditions	volume; density; temperature	kg water or wastewater
calc_direct_fossil_co2	carbon_dioxide_fossil	direct fossil CO2 = attributable natural-gas quantity × documented site- and period-applicable CO2 factor or equivalent carbon balance	natural-gas quantity; factor or carbon content; oxidation assumption	kg direct fossil CO2
calc_material_balance	metal inputs, product and steel scrap	reconcile consumed metal inputs with net metal in product, measured scrap, stock returns and explained inventory or process losses over one production order	material issues; returns; accepted product BOM; scrap tickets; inventory change	material-balance discrepancy and explanation

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Declare subtype, designation, pressure-bearing status, technical specification, design code, material grades, test status and net mass so the complete-equipment boundary can be reviewed.	accepted drawing list, data sheet, nameplate or conformity record and acceptance certificate
dq_material_traceability	pressure-boundary materials and permanent joining	Retain material certificates, heat or batch traceability, welding procedure and consumable identity applicable to the manufactured item.	certified material records, weld map, procedure qualification and stores records
dq_measurement	all measured flows	Use calibrated or verified meters and scales; retain original units and conversion inputs; document estimates and allocation separately from direct measurements.	calibration records, invoices, meter logs and calculation workbook
dq_temporal_scope	foreground dataset	Cover a complete representative production order or a documented set of orders; align all numerator flows and accepted product mass to the same period.	production schedule, order closeout and temporal reconciliation
dq_completeness	foreground inventory	Reconcile bill-of-material, energy, water, waste and direct-emission records; identify excluded operations and quantify or justify each cut-off.	completeness checklist, balances and signed exclusion record
dq_outsourced_operations	contracted fabrication, heat treatment, coating or testing	Include contracted operation inputs and outputs or use a representative upstream service dataset; do not omit them because they occur off site.	purchase order, contractor records and boundary statement

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_flow	reference flow	Confirm exactly one 1 kg reference-product output uses the audited CPC 42330 UUID, Mass property and kg unit, and that removable packaging is excluded from net product mass.	un-cpc-3-0-2025
validate_identity_qualifiers	dataset metadata	Fail completeness when product subtype, designation, technical specification, material grades, manufacturing geography, factory-acceptance state or applicable pressure/design qualifiers are missing.	uk-pressure-equipment-guidance-2025, doosan-steam-condensers-heat-exchangers
validate_atomic_inventory	process inventory	Confirm each inventory row is one atomic exchange; each conditional row has a documented applicable route; UUID-bearing rows match flow type, property and unit; unresolved plate UUIDs remain explicitly flagged.
validate_mass_balance	metal inputs, product and scrap	Review the order-level material reconciliation and require an explanation for differences exceeding the site's documented measurement uncertainty.
validate_energy_water_balance	electricity, gases and water	Confirm meters, allocation drivers, reference conditions, density conversions, water reuse and normalization all refer to the same production period and accepted output.
validate_direct_emissions	fossil carbon dioxide	Confirm the row includes direct on-site natural-gas combustion only and that the factor or carbon balance is cited and applicable to the foreground site and period.
validate_pressure_controls	pressure-bearing equipment	Confirm required joining qualifications, NDT, final inspection and pressure or leak-test evidence are retained for the declared conformity route.	uk-pressure-equipment-guidance-2025, uk-hse-ndt-pressure-equipment, uk-hse-pressure-testing-gs4

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset or background_dataset after methodology review and dataset verification
downstream_use	Cradle-to-gate process datasets and lifecycle-model inputs for complete CPC 42330 boiler auxiliary plant or steam/vapour power-unit condensers
allowed_use	Product- and route-matched equipment with comparable pressure status, design/conformity basis, material system, manufacturing geography, factory-gate condition and packaging boundary
excluded_use	Boilers, turbines, valves, standalone pumps or fans, separately supplied parts, customer-site installation, operational performance, maintenance, retrofit and end-of-life without added scenario data
required_metadata	PCR id and version; product subtype; model or project; technical specification; pressure/design qualifiers; material grades; net product mass; manufacturing site and period; route and outsourced operations; allocation; data sources; cut-offs; packaging and test boundary
required_quality_disclosure	Primary-data share; measurement and allocation methods; unresolved UUIDs; missing two-source ranges; material, energy and water reconciliation; factor citations; representativeness; uncertainty and verification status
update_trigger	Material change in product design, mass or grade; manufacturing route, supplier, site, energy mix, test regime, packaging, allocation, applicable conformity requirement, foreground period or background data

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-2025	dataset	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; SHA-256 5cd2c1c4890dd6be16af48e9bb940fed48efff9865f39ff15edaa921da25fb7c)	Official CPC 42330 identity and neighbouring complete-equipment/parts distinction
un-hs-2017-heading-8404	official_guidance	United Nations Statistics Division, HS 2017 heading 8404 detail, https://unstats.un.org/unsd/classifications/Econ/Structure/Detail/en/2089/84 (retrieved 2026-09-05)	Boiler-auxiliary examples and steam or other vapour power-unit condenser boundary
china-mofcom-hs-8404-nomenclature	official_guidance	Ministry of Commerce of the People's Republic of China, tariff nomenclature entries 84041010 and 84042000, https://policy.mofcom.gov.cn/claw/clawContent.shtml?id=9727 (retrieved 2026-09-05)	Verification of professional Chinese product terminology
uk-pressure-equipment-guidance-2025	official_guidance	UK Office for Product Safety and Standards, Pressure Equipment (Safety) Regulations 2016: Great Britain, March 2025, https://www.gov.uk/government/publications/pressure-equipment-safety-regulations-2016/pressure-equipment-safety-regulations-2016-great-britain (retrieved 2026-09-05)	Pressure-equipment scope, manufacturer documentation, conformity, permanent joining and NDT controls
uk-hse-ndt-pressure-equipment	official_guidance	UK Health and Safety Executive, Inspection/Non Destructive Testing, https://www.hse.gov.uk/comah/sragtech/techmeasndt.htm (retrieved 2026-09-05)	Forming and chamfering, permanent joints, NDT, final inspection and pressure-test process decomposition
uk-hse-pressure-testing-gs4	official_guidance	UK Health and Safety Executive, Safety requirements for pressure testing, GS4, fourth edition, 2012, https://www.hse.gov.uk/pubns/gs4.htm (retrieved 2026-09-05)	Factory pressure-testing boundary and test-record quality requirements
doosan-steam-condensers-heat-exchangers	handbook	Doosan Enerbility, Turbine and Generator Technologies — Condensers and heat exchangers, https://www.doosanenerbility.com/heavy_file/business/data/fire_power/Doosan_STG_Brochure.pdf (retrieved 2026-09-05)	Steam-condenser variants, tube-material/cooling-water qualifiers and pressure-equipment design-code disclosure