Sheet piling of iron or steel and welded angles, shapes and sections of iron or steel · Calculation Rules
- Lifecycle status
- Candidate
- Content maturity
- Authored methodology
- Current version
- No published versionLast updated
- Readiness
- Review required
Methodology and translation states come from the source record; publishing this website does not change their review status.
Content languages
zh-CN · Aligned
Status, classification and source details
Readiness
- Warnings methodology_not_reviewed Authored methodology is candidate guidance and still requires methodology review.
Classification mapping
CPC 3.0:41252 · exact
Source
Calculation Rules
| rule_id | Applies to | Formula or rule | Inputs | Output | source_ids |
|---|---|---|---|---|---|
| normalize | all inventory | q_i = attributed external period amount_i / D; allocation precedes normalization. D excludes repeated rework output. | cp_final_product; each cp_i | amount per 1 kg reference flow | |
| element_balance | steel and coating | For each measured element e: sum external input gross mass_i * measured fraction_e_i + opening element stock = accepted body element + coating element + exported residues element + measured releases element + closing stock. Same-element assays apply to every term; dissolved effluent uses compatible concentration * volume. Report residual against propagated measurement uncertainty; never impose a common Fe/alloy fraction. | mass; assays; stocks; release records | Separate elemental closures | |
| water_balance | controls | Makeup + opening water stock + reaction-generated water = discharge + evaporation + product/waste carryover + closing stock + reaction-consumed water. Internal recirculation cancels; reconcile water carried by solutions without double counting. | meters; stock; moisture; reaction records | Water closure | |
| chemical_balance | welding and surface | Close each active chemical/weld-flux/coating component with measured inputs, stocks, reacted/retained mass, recovery and residue. Separate carbon and alloy oxidation, oxygen uptake and gas reaction products; shield-gas CO2 release is distinct from fuel combustion CO2. | formulation; consumption; stock; composition; reaction records | Component and reaction closures | |
| coating_conversion | surface_gate | When coverage is collected by area or length, use measured area/length and actual accepted coated mass; dry retained mass is separately measured. No coating density, thickness, transfer efficiency or weld deposition yield is prescribed. | area; length; mass; coating records | Measured conversion to D |
Data Quality Requirements
| requirement_id | Applies to | Requirement | Evidence |
|---|---|---|---|
| identity | all flows | Match product/waste/elementary type, property, supply interface, route, formulation, geography and state before assigning UUID; classification code or baseName alone cannot prove identity. | Direct qualified record and supplier documents |
| coverage | all data | Same representative period, route and site; trace meters, lot genealogy, offsite work and stocks. Report missing data and uncertainty; absence needs evidence. | Audit and calibration records |
| ranges | all quantities | Collect actual foreground amounts. No generic yield, energy, weld consumption, alloy fraction or coating factor. Numeric defaults/guardrails require independent originals with matching route/boundary/unit conditions; unresolved evidence remains a gap. | Primary observations and source applicability review |
9. Validation Rules
| rule_id | Applies to | Rule | source_ids |
|---|---|---|---|
| validate_reference | final_product | Require D > 0, finite kg and every qualifier; distinguish accepted steel body, weld metal, coating/sealant and packing. | |
| validate_route | all processes | Verify hot/cold sheet-pile and welded-section modules against records; bypass only completed supplier operations with burden links. Reject installed-service or unqualified-grade substitutions. | |
| validate_balance | all exchanges | Check gross mass and every measured same-element balance separately, water/chemical/weld-flux/coating closure, stock matching, internal transfers and rework energy; investigate residuals beyond measured uncertainty. Never enforce pure Fe or fixed alloy fractions. | |
| validate_exchange | inventory | Require atomic exchanges, dimensionally supported units, matched reporting period and explicit supplier/treatment links; keep missing UUIDs or quantities unresolved, not zero or guessed. |
10. Published Dataset Profile
| Field | Value |
|---|---|
| dataset_role | foreground_dataset |
| downstream_use | secondary_dataset; background_dataset |
| allowed_use | Route/grade/surface-qualified product supply inventory and downstream process/lifecyclemodel projection |
| excluded_use | Installed wall performance or lifetime comparisons; other sections or unqualified grades; generic electricity or unqualified steel substitution |
| required_metadata | product family and interlock/section geometry; hot-rolled or cold-formed sheet-pile route; welded built-up section route; specification and edition; grade and heat chemistry; thickness and length; delivered net unit mass; weld procedure, filler and shielding system; acceptance tests; coating system and coating mass; supplier feed form and completed upstream operations; site, period, electricity interface and geography |
| required_quality_disclosure | Site/period/route, measurements, allocation, balances, upstream linkage, uncertainty and unresolved identities/ranges |
| update_trigger | Grade, geometry, route, weld/coating system, supplier interface or representative period changes |
11. Data Sources
| Source id | Type | Reference | Used for |
|---|---|---|---|
ec-fmp-bref-2022 | official_guidance | European Commission JRC. Ferrous Metals Processing BREF, 2022, DOI 10.2760/196475. https://doi.org/10.2760/196475 | Section 2.2.1.5, printed pp.47–50 and Figs.2.10/2.13: section and sheet-pile rolling; sections 2.2.17–18: water circuits and residues. General mill facts, no product-specific numeric factors. |
arcelormittal-cold-piles-2025 | literature | ArcelorMittal. Manufacturing cold formed sheet piles, 20 January 2025. https://constructalia.arcelormittal.com/en/news_center/2025/01/cold-formed-steel-sheet-piles | Producer description verifies hot-rolled coil as cold-formed sheet-pile feed; promotional efficiency claims supply no yield range. |
twi-saw | handbook | TWI. What is Submerged-arc Welding? https://www.twi-global.com/technical-knowledge/faqs/faq-what-is-submerged-arc-welding | Wire/flux/slag and absence of external shielding gas for SAW; no welding quantities prescribed. |
twi-mag | handbook | TWI. What is Gas Metal Arc Welding? https://www.twi-global.com/technical-knowledge/faqs/faq-what-is-mig-mag-welding | Gas-shielded wire-welding distinction; gas identity/amount remains procedure-specific. |
epa-fabricated-metal-2021 | official_guidance | US EPA. Sector AA: Fabricated Metal Products Manufacturing Facilities, EPA 833-F-06-042, February 2021, Table 1 p.2. https://www.epa.gov/sites/default/files/2015-10/documents/sector_aa_fabmetal.pdf | Independent qualitative cross-check for preparation, painting, galvanizing and waste omissions; broad stormwater-sector scope, not evidence that every product uses every operation. |
ec-pef-2021 | official_guidance | Commission Recommendation (EU) 2021/2279, consolidated 30 December 2021, section 4.5 pp.87–88. https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX%3A02021H2279-20211230 | Allocation hierarchy; study-specific application and explicit recycling boundary. |
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