Dry three-strand polypropylene rope manufacture

1. Scope and Applicability

This method covers purchased, spun and drawn PP filament yarn of declared composition, dry preparation/strand formation and three-strand laying at the rope plant, followed by mechanical cutting, inspection and coil dispatch. The representative product is general-purpose three-strand PP rope without newly applied on-site coating. Actual orders and acceptance records establish dimensions, linear mass, strength and lay length. Supplier-added pigment, stabilizer and spin finish remain part of incoming yarn composition and upstream burdens.

Exclude natural fibres, PET/nylon/high-modulus fibres, PP blends with other polymers, braided ropes, nets, metal cables, electrical cables, sling assemblies and downstream use. Polymerization, fibre extrusion/drawing, melt end-cutting, heat-setting, on-site dyeing, washing and newly applied chemical coating are outside this dry route. Actual additional operations require a documented boundary expansion and individual exchanges. The official CPC document only supplies the broad category title; this method does not cover the whole of 27310. Manufacturer originals support yarn-based three-strand rope and twisting operations; coated dielectric rope supplies counterevidence against treating every PP rope as the same dry route. See deyuan-pp-rope, meera-pp-twisting, samson-coated-counterevidence and unsd-cpc-notes.

Factory yarn preparation and strand formation are distinct from laying three finished strands into a rope. A purchased already-plied qualifying yarn may use the existing man-made cabled-yarn method upstream, with its actual processing state declared; do not count that preparation again. The existing netting method treats rope manufacture as upstream and explicitly excludes unconverted rope.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.textile-articles-other-than-apparel.dry-three-strand-polypropylene-rope
classification_refs	CPC 3.0 27310; narrower
covered_products	Dry three-strand PP rope made from purchased PP filament yarn without newly applied on-site coating
excluded_products	Braided ropes; blended ropes; natural-fibre ropes; integrated extrusion or wet-finishing routes; specially coated ropes; nets; metal and electrical cables
representative_product	General-purpose three-strand PP rope coil with declared composition and configuration
production_route	Yarn receipt/preparation → strand twisting → three-strand laying/take-up → mechanical cutting/inspection/packing
market_state	Accepted rope coil at factory gate; packaging mass separate; no use-service claim

3. Reference Flow

Field	Value
What	Manufacture accepted PP rope of declared composition and three-strand construction
How much	1 kg accepted net rope
How well	Declare diameter, lay length/direction, measured linear mass, break-test method/results, colour/additives and incoming state; no automatic safety-use qualification
How long or cycle	One manufacturing batch; no assumed service life or reuse cycles
reference_flow_link	finished_rope_output

Field	Value
Reference amount	1
Reference product flow	Dry three-strand polypropylene rope, accepted net product
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	PP/additive mass composition; filament form and incoming processing state; virgin/recycled share; three-strand construction; lay direction/length; diameter; measured linear mass; test method/acceptance status; net mass excluding packaging; site/period; wet-finishing/coating exclusions

Mass is a manufacturing normalization basis, not equal length, equal breaking force or equal lifetime service. Keep the unverified reference-product UUID blank and register the exact finished output row in manifest; generic plastic rope and farm baling twine are not substitutes.

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	Weigh accepted rope net mass with a calibrated scale for the same released lot; exclude detachable spool, ties and packaging; normalize all inventory rows per 1 kg reference flow.
linear_mass	length records	Mass and length separately	kg; m	Measure net mass and length of the same rope configuration to obtain kg/m; do not infer rope mass from diameter or polymer density.
electricity_unit	strand_electricity; laying_electricity; packing_electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve the public identity actual Net calorific value reference and energy unit group; multiply metered kWh by 3.6 to obtain MJ, never relabel as Mass.

Net calorific value retains Units of energy 93a60a57-a3c8-11da-a746-0800200c9a66 with MJ as the reference unit.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased processed PP filament yarn at plant receipt, with declared colour and finish state
starting_condition_role	Upstream-prepared technosphere material input
product_classification_scope	One narrow manufacturing route within CPC 27310
recursive_input_rule	Purchased strands or semi-finished rope require disclosure of omitted stages and upstream links; they cannot masquerade as raw yarn while claiming preparation/strand manufacture. Link internal transfers once.
upstream_dataset_requirement	Match actual PP route, yarn processing state, additives, recycled share, regional electricity and packaging upstream datasets; disclose gaps
disclosure	Manufacturing foreground only; polymer/fibre manufacture, inbound external transport, use and end-of-life are separately modelled; no complete cradle-to-gate claim

rule_id	Applies to	Rule	source_ids
boundary_stages	manufacturing stages	Include direct exchanges of yarn preparation, strand twisting, three-strand laying/take-up, mechanical cutting/inspection and actual packing. Machine purchasing energy does not replace operating meters; integrated machines may share measurement only with stage responsibility and no double counting documented.	meera-pp-twisting; deyuan-pp-rope
boundary_extensions	optional and excluded operations	Dyeing, coating, heat-setting, melt cutting and washing are not mandatory for this dry route. Actual additional operations require expansion with each chemical, water, fuel, wastewater and measured emission separately. Coated dielectric rope cannot directly use this profile.	samson-coated-counterevidence
boundary_direct_emissions	elementary and technosphere exchanges	This baseline does not assume direct combustion, resource-water withdrawal, effluent or dust emission; zero elementary rows require site completeness checking. Electricity-supply emissions remain upstream. Add actual releases individually by measured substance, origin, compartment and subcompartment. Collected offcuts are not airborne particulates. Actual compressed air, cleaning agent, lubricating oil and other auxiliaries require specific additions or a documented omission scope.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
strand_preparation	Yarn receiving, preparation and strand twisting	required	Actual stage for this declared route; conditional cards only when present	foreground manufacturing	per 1 kg reference flow
rope_laying	Three-strand laying and take-up	required	Actual stage for this declared route; conditional cards only when present	foreground manufacturing	per 1 kg reference flow
inspection_packing	Cutting, inspection, release and coil packing	required	Actual stage for this declared route; conditional cards only when present	foreground manufacturing	per 1 kg reference flow

Process: Yarn receiving, preparation and strand twisting (strand_preparation)

Inputs

Product flows

Polypropylene filament yarn (filament_yarn_input)

Receive fully spun and drawn PP filament yarn, with supplier-declared colour, additives, twist and recycled status. This is not PP resin or loose staple fibre. Record net consumed yarn after returns and stock reconciliation.

• Selected flow: Polypropylene filament yarn 26f0ce1c-fd85-402c-8993-4e843df4f762
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material
• Sources: meera-pp-twisting

Alternating current (strand_electricity)

Adopt this public electricity identity only for a Chinese site supplied with grid-average alternating current below 1 kV at the user boundary. Meter this stage including attributable idle/changeover and auxiliary drive use; for another region, voltage or supply mix retain a specific electricity row with a separately verified identity.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy
• Sources: meera-pp-twisting

Waste flows

Elementary flows

Outputs

Product flows

Dry twisted polypropylene rope strand (strand_output)

Weigh the actual strand transferred to laying; record strand yarn count, twist direction and twist level. This intermediate is linked once to strand_input; it is not sold reference rope.

• Selected flow: Dry twisted polypropylene rope strand
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_transfer
• Sources: meera-pp-twisting

Waste flows

Polypropylene filament yarn offcuts (strand_pp_waste)

Record only segregated PP filament yarn removed during preparation; weigh actual removed offcuts, including setup rejects. Internal returns are not waste exports.

• Selected flow: Polypropylene filament yarn offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste
• Sources: meera-pp-twisting

Elementary flows

Process: Three-strand laying and take-up (rope_laying)

Inputs

Product flows

Dry twisted polypropylene rope strand (strand_input)

Receive three strands of the same declared PP construction. Reconcile mass and lot with strand_output; do not attach an additional yarn-production dataset to this internal link.

• Selected flow: Dry twisted polypropylene rope strand
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_transfer
• Sources: meera-pp-twisting

Alternating current (laying_electricity)

Adopt this public electricity identity only for a Chinese site supplied with grid-average alternating current below 1 kV at the user boundary. Meter this stage including attributable idle/changeover and auxiliary drive use; for another region, voltage or supply mix retain a specific electricity row with a separately verified identity.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy
• Sources: meera-pp-twisting

Waste flows

Elementary flows

Outputs

Product flows

Unreleased dry three-strand polypropylene rope (laid_rope_output)

Record net rope leaving three-strand laying and take-up before final inspection. Measure actual lay, diameter and linear mass; no twist contraction factor is assumed.

• Selected flow: Unreleased dry three-strand polypropylene rope
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_transfer
• Sources: meera-pp-twisting

Waste flows

Polypropylene rope laying offcuts (laying_pp_waste)

Weigh segregated PP rope rejected at laying; keep contamination and external destination explicit. Do not assume it has undergone mechanical recycling.

• Selected flow: Polypropylene rope laying offcuts
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste
• Sources: meera-pp-twisting

Elementary flows

Process: Cutting, inspection, release and coil packing (inspection_packing)

Inputs

Product flows

Unreleased dry three-strand polypropylene rope (laid_rope_input)

Link to laid_rope_output, accounting for intermediate stock and rework. Record the mass actually inspected and cut to sale length.

• Selected flow: Unreleased dry three-strand polypropylene rope
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_transfer
• Sources: deyuan-pp-rope

Alternating current (packing_electricity)

Adopt this public electricity identity only for a Chinese site supplied with grid-average alternating current below 1 kV at the user boundary. Meter this stage including attributable idle/changeover and auxiliary drive use; for another region, voltage or supply mix retain a specific electricity row with a separately verified identity.

• Selected flow: Alternating current 50657322-939c-4829-a87b-47c093bfa6a7
• Flow property / unit: Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66 / MJ
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy
• Sources: deyuan-pp-rope

Corrugated cardboard (corrugated_board_input)

Conditional: record this individual packing component only if corrugated board is used for the rope coil. This UUID is applicable only to type C, E or F corrugated board with at least 80% fibre and recycled material content, matching the public original. Otherwise retain this atomic row with a separately verified identity or blank UUID. Collect actual grade, recycled content, converted state and consumed mass; the input is not a composite packaging selector.

• Selected flow: Corrugated cardboard 8bde297e-98df-463f-bcb4-0db52bf6e0b5
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: deyuan-pp-rope

Waste flows

Elementary flows

Outputs

Product flows

Dry three-strand polypropylene rope, accepted net product (finished_rope_output)

Accepted complete rope in coils, without detachable spool or transport packaging. Declare the measured composition and configuration of the same sale lot; defective rope and test specimens are excluded from accepted output.

• Selected flow: Dry three-strand polypropylene rope, accepted net product
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: 1 kg
• Value mode: Fixed value (fixed_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output
• Sources: deyuan-pp-rope

Waste flows

Polypropylene rope inspection and cutting rejects (inspection_pp_waste)

Weigh discarded PP rope, including destructive test pieces, cut ends and rejected coils that are not reworked internally. Destination and contamination are mandatory collection fields.

• Selected flow: Polypropylene rope inspection and cutting rejects
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_waste
• Sources: deyuan-pp-rope

Packaging waste, cardboard (cardboard_waste)

Conditional: weigh cardboard packing trim/rejects generated on site; collect disposal or recovery destination without imposing a loss fraction or treatment process.

• Selected flow: Packaging waste, cardboard 72270223-04b1-4986-a546-94e5a0821317
• Flow property / unit: Mass 93a60a56-a3c8-11da-a746-0800200b9a66 / kg
• Amount rule: Measured batch exchange amount divided by accepted net rope mass of the same batch; preserve the actual numerator unit and raw batch total.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_pack
• Sources: deyuan-pp-rope

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_direct	different rope products and shared machinery	Use cp_energy stage meters and orders for direct attribution, avoiding allocation first. Do not allocate by length unconditionally across different linear mass, twist and machine settings. Remaining shared use requires contemporaneously measured running time/load relationship. Mass allocation needs evidence of equivalent process settings and consumption relationship, with sensitivity disclosed.
allocation_rework	rework and offcuts	Keep actual extra electricity for internal rework/strand transfers; cancel internal material loops in the combined system and avoid duplicate upstream burdens. Weigh exported waste separately from accepted rope; intended recycling gives no automatic substitution credit. Saleable co-products require boundary, allocation basis and reproducible quantities.

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_output	inspection_packing	reference output	weighing	lot; net mass; packaging tare; length; diameter; lay length; acceptance result	Calibrated-scale weighing of the same accepted lot, subtract packaging/spool tare; calibrate length counter and sample same-configuration linear mass, retain weighing and release originals	kg; m	each batch	complete representative consecutive period, actual dates and exceptional batches	selected site and same rope configuration	per 1 kg reference flow	scale/length calibration; batch release and sampling records
cp_material	strand_preparation	incoming yarn	mass balance	receipts; returns; opening/closing stock; net consumption; yarn composition/state	Calibrated weighing plus lot issue/return ledger, verify supplier processing state and composition	kg	each batch and period reconciliation	same period as cp_output	yarn preparation	per 1 kg reference flow	supplier lots; weights; stock ledger
cp_transfer	all	internal intermediate	weighing	transfer lot; strand/rope net mass; opening/closing stock; rework amount	Match calibrated weights at stage exit/entry for the same lot; rope length cannot substitute strand mass	kg	each transfer	same period as cp_output	strand to laying to inspection	per 1 kg reference flow	paired lot IDs, stock and rework records
cp_energy	all	electricity	meter reading	stage meter readings; voltage; region; running/idle time; order; shared-use basis	Submeter or measured power and run time including attributable idle/auxiliary load; reconcile main meter, never use nameplate rated power as actual power	kWh; MJ	each shift/batch	same period as cp_output	three manufacturing stages	per 1 kg reference flow	meter calibration; voltage/order; allocation record
cp_waste	all	PP offcut waste	weighing	stage; material; contamination; net waste mass; destination; internal rework	Weigh segregated PP waste separately by stage, excluding packaging and unidentified waste mixtures	kg	each batch	same period as cp_output	each generating stage	per 1 kg reference flow	scale calibration; segregation/handover records
cp_pack	inspection_packing	cardboard input and cardboard waste	weighing	cardboard grade; recycled share; consumption; waste; dispatched packaging mass	Separately weigh actual cardboard input, cut waste and delivered packaging; do not substitute purchase-lot mass for consumption	kg	each batch	same period as cp_output	rope coil packing	per 1 kg reference flow	packing weights; purchase specifications; dispatch reconciliation

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_batch	all inventory rows	Divide each actual exchange amount by accepted net rope mass of the same batch, per 1 kg reference flow; finished output is 1 kg. Incoming yarn mass is not the accepted-output denominator.	cp_output; cp_material; cp_transfer; cp_energy; cp_waste; cp_pack	exchange quantity per 1 kg reference flow
convert_electricity	strand_electricity; laying_electricity; packing_electricity	Multiply metered kWh by 3.6 for MJ, then normalize by the same accepted batch net rope mass.	cp_energy; cp_output	MJ/kg	si-units
reconcile_mass	yarn, intermediates and wastes	Within the same period, inputs plus opening stocks equal accepted output plus exported waste plus closing stocks and explained measurement residual; cancel internal transfers, balance packaging separately. Unbalanced mass is not automatically dust or gaseous emission.	cp_material; cp_transfer; cp_output; cp_waste; cp_pack	batch mass balance and residual

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
quality_configuration	rope and yarn	Verify actual composition/state, filament form, colour/finish, lay length, diameter, linear mass and test method; different configurations are not service-equivalent.	cp_material; cp_output; deyuan-pp-rope
quality_coverage	all stages	Cover changeover, setup, rework and rejects; disclose dates, production, measurement coverage, gaps, exclusions, allocation and uncertainty. Never invent energy, losses or recipes.	cp_output; cp_energy; cp_waste
quality_identity	public identities	Verify UUID type, actual reference property/unit group, processing and supply qualifiers; unconfirmed identities remain concrete atomic rows with blank UUID. Supplier datasets must not duplicate foreground strand formation/laying.	cp_material; cp_energy
quality_releases	site environmental completeness	Check actual combustion, resource withdrawal, washing, leakage, airborne fibre particulates or effluent. Zero elementary rows describe this boundary, not an emission-free plant claim; unverified conditions mean incomplete coverage.	cp_energy; cp_waste

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validation_reference	finished_rope_output	Check 1 kg accepted net rope output, all required qualifiers, same-lot weighing and packaging tare; align bilingual names and row_id. Blank reference UUID is a declared candidate identity gap, not full identity resolution.
validation_stage_links	strand_output; strand_input; laid_rope_output; laid_rope_input	Check sequence, lots and quantities, explain stock/rework differences and avoid duplicate upstream burdens on internal links. Purchased strand/rope requires disclosure of omitted stages.	meera-pp-twisting
validation_quantities	all inventory rows	Normalize each row by same-batch accepted net mass; preserve electricity Net calorific value, MJ and kWh conversion. Verify actual occurrence and collection evidence row by row. Quantities must be finite/nonnegative and accepted output positive; explain residual against measured uncertainty, with no universal loss threshold.	si-units
validation_boundary	site and data package	Actual coating, wet treatment, extrusion, heat-setting or melt cutting requires boundary expansion and added flows. Verify elementary, water, waste and auxiliary coverage. Unverified scope is inconclusive, never zero by omission; this manufacturing profile does not approve dielectric or lifting safety.	samson-coated-counterevidence

10. Published Dataset Profile

Field	Value
dataset_role	manufacturing_foreground
downstream_use	secondary_dataset; background_dataset
allowed_use	Three-strand PP rope manufacturing module under declared composition/construction/site/period/boundary, with explicit upstream links
excluded_use	Complete cradle-to-gate or lifetime comparison; whole-CPC coverage; unspecified rope substitution; dielectric, food-contact, lifting or health/compliance approval
required_metadata	composition/additives; incoming state; virgin/recycled share; three-strand construction/lay; diameter/measured linear mass; net mass/packing; test method; site/period; supply voltage; upstream links; allocation
required_quality_disclosure	identity gaps; scientific review state; measurement/period coverage; uncertainty; uncovered processes; site verification of zero elementary rows; absence of default consumption/loss ranges
update_trigger	changes in composition, incoming state, process, finishing, electricity or configuration; resolved identities or new scientific-review evidence

11. Data Sources

Source id	Type	Reference	Used for
unsd-cpc-notes	official_guidance	UNSD, CPC Version 3.0 Explanatory Notes, 30 June 2025, p. 128. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	27310 category and adjacent netting; no specific process explanation
deyuan-pp-rope	literature	Deyuan Marine, 3-Strand PP Rope, Product Introduction. https://www.deyuanmarine.com/3-Strand-PP-Rope-pd129282238.html	Existence/construction of three-strand PP multifilament rope; no adoption of promotional certification/performance/tolerance values
meera-pp-twisting	literature	Meera Industries, Twisted PP Yarn, Webbing & Rope Manufacturing, 4 December 2025, opening ecosystem and sections 2, 6. https://meeraind.com/resources/pp-yarn-webbing-rope-manufacturing-meera-twisting-solutions	Qualitative preparation/twisting/winding decomposition; machine-supplier account establishes no universal process necessity or consumption
samson-coated-counterevidence	literature	Samson, LightSpeed-3, product description and dielectric selection instructions. https://www.samsonrope.com/utility/lightspeed-3	Coated dielectric PP rope as excluded-route counterevidence; no generalization of its lifetime, density or strength
si-units	official_guidance	BIPM, SI Brochure, 9th edition V4.01 (June 2026), section 2.3.4/Table 4 (p. 133, PDF p. 23), section 4/Table 8 (p. 140, PDF p. 30), W = J/s and h = 3600 s. https://www.bipm.org/en/publications/si-brochure	Exact kWh-to-MJ unit conversion, not energy-consumption factor

Web originals consulted 2026-10-06. Manufacturer originals support qualitative routes and product qualifiers only. Foreground protocols implement measurement, normalization and allocation; no default material recipe, temperature, energy, net yield or lifetime is prescribed.