Seamless steel line pipe for oil or gas pipelines · 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 3.0:41281 · exact
Source
Calculation Rules
| rule_id | Applies to | Formula or rule | Inputs | Output | source_ids |
|---|---|---|---|---|---|
| normalization | all exchanges | q_i = allocated external amount_i / D; output reference = 1 kg. Reconcile material stocks and cancel internal transfers before calculation. | cp_final_product; row-specific cp | per 1 kg | |
| physical_balance | site | Retain separate gross masses of received steel, accepted steel body, scrap, wet solids, water and opening/closing work in progress; do not add contained-iron mass to gross steel mass. Close the elemental iron balance on one contained-Fe basis: measured Fe in external feed plus opening work in progress = measured Fe in accepted steel body, external scrap, scale, sludge and effluent plus closing work in progress and every other measured Fe release. Derive each term from its own measured gross mass and Fe assay; use matched concentration and volume for effluent. Retain carbon and each actual alloy-element oxidation, release, retained mass and chemical-reaction records as separate elemental balances. Account for oxygen uptake, water content and actual reaction products; never assume pure iron, common composition, a fixed conversion or an invented yield. Cancel internal rework; retain its repeated energy and chemistry. Close water makeup + opening storage = external transfer + discharge + evaporation + product carryover + closing storage; close acid/chemical active-component stock, reaction, carryover and waste balances with measured uncertainty. | Steel/iron assays; water meters; acid concentration; stocks; waste records | Closure residual with measurement uncertainty; no invented tolerance | |
| energy_conversion | utilities | Metered kWh × 3.6 = MJ; fuel mass × measured NCV = MJ. Shared service allocations sum to measured total. | Meters; NCV; calibration; allocation driver | MJ |
Data Quality Requirements
| requirement_id | Applies to | Requirement | Evidence |
|---|---|---|---|
| qualification | pipe | oil/gas linepipe application; specification and edition; product specification level; steel grade and heat chemistry; outside diameter, wall thickness and length; seamless forming route; hot/cold finishing; delivery heat-treatment condition; sour-service requirements; inspection and hydrotest acceptance; surface/coating system and coating mass; end preparation; site, period and feed starting state | Order; mill certificate; dimensional/heat-treatment and test records |
| coverage | all rows | Record applicability as present, absent, measured zero or unknown. No missing-as-zero. Resolve exact flow identity, supplier geography/year, treatment destination and emission compartment before dataset completion. | manifest review_metadata |
| ranges | all rows | No default process intensity, yield, chemistry or empirical range is established. Use foreground records; independent compatible range evidence remains pending. | Retained records and uncertainty |
9. Validation Rules
| rule_id | Applies to | Rule | source_ids |
|---|---|---|---|
| validate_reference | final_product | Check positive measured D, 1 kg reference, accepted product, steel/coating separation and all qualifiers. Do not label generic tube or welded/OCTG UUID as seamless linepipe. | |
| validate_balance | production | Retain separate gross masses of received steel, accepted steel body, scrap, wet solids, water and opening/closing work in progress; do not add contained-iron mass to gross steel mass. Close the elemental iron balance on one contained-Fe basis: measured Fe in external feed plus opening work in progress = measured Fe in accepted steel body, external scrap, scale, sludge and effluent plus closing work in progress and every other measured Fe release. Derive each term from its own measured gross mass and Fe assay; use matched concentration and volume for effluent. Retain carbon and each actual alloy-element oxidation, release, retained mass and chemical-reaction records as separate elemental balances. Account for oxygen uptake, water content and actual reaction products; never assume pure iron, common composition, a fixed conversion or an invented yield. Cancel internal rework; retain its repeated energy and chemistry. Close water makeup + opening storage = external transfer + discharge + evaporation + product carryover + closing storage; close acid/chemical active-component stock, reaction, carryover and waste balances with measured uncertainty. | |
| validate_complete | dataset | Check applicable routes, each atomic external exchange, normalization, provider/waste fate and post-control emissions. Unresolved UUID, mandatory unknown quantity or unsupported unit conversion blocks a complete dataset; candidate methodology checks do not constitute product conformance. |
10. Published Dataset Profile
| Field | Value |
|---|---|
| dataset_role | foreground_dataset |
| downstream_use | process; lifecyclemodel |
| allowed_use | Specified seamless linepipe manufacturing, with upstream burdens linked |
| excluded_use | Welded/OCTG or installed pipeline; full API conformity inferred from this PCR |
| required_metadata | oil/gas linepipe application; specification and edition; product specification level; steel grade and heat chemistry; outside diameter, wall thickness and length; seamless forming route; hot/cold finishing; delivery heat-treatment condition; sour-service requirements; inspection and hydrotest acceptance; surface/coating system and coating mass; end preparation; site, period and feed starting state |
| required_quality_disclosure | Route, upstream coverage, identity/measurement gaps, uncertainty, allocation and waste fate |
| update_trigger | Grade/specification, process route, coating, yield, supply or acceptance requirement change |
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, chapter 1 steel tubes; 2.2.1.6 tube mills; 2.2.18 wastes; 2.3.2 energy; 2.3.5 emissions. https://bureau-industrial-transformation.jrc.ec.europa.eu/sites/default/files/2022-12/FMP%20BREF_Final%20Version.pdf | Seamless billet heating, piercing, elongation, final rolling and heat treatment; conditional cold drawing; water, oil, scale and combustion controls. No universal intensity or temperature adopted. |
| api-5l-announcement-2026 | official_guidance | API, API Announces 47th Edition of Foundational Line Pipe Standard, 2 June 2026. https://www.api.org/news-policy-and-issues/news/2026/06/02/api-announces-47th-edition-of-api-specification-5l | Official scope and manufacture/inspection/test/marking/traceability categories only. Announcement is not the specification: obtain the actual order edition and clauses for conformance. |
| tenaris-coatings | extension_guidance | Tenaris, Offshore and Onshore Pipeline Coating Solutions, pages 4 and 6, undated brochure, retrieved 2 October 2026. https://www.tenaris.com/media/1jtmlf5o/offshore-onshore-pipeline-coatingsolutions.pdf | Conditional FBE, adhesive and polyethylene/polypropylene layers; separate internal coating. Manufacturer offerings do not establish mandatory coating or universal thickness/intensity. |
| ef-allocation-2021 | official_guidance | Commission Recommendation (EU) 2021/2279, Annex I section 4.5. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02021H2279-20211230 | Subdivision, physical-causality and other-relationship allocation hierarchy; no claim of complete PEF conformance. |
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