Bare TIG-welded steel motorcycle main-frame manufacture

1. Scope and Applicability

New complete bare motorcycle structural main frames made from declared low-carbon steel tubes and integral steel mounts by actual argon-shielded TIG welding. Include the drawing-defined steering head and integral engine/swingarm mounting datums, received-versus-fabricated subpart scope, applicable mechanical finishing and cleaning, dimensional/weld/net-mass acceptance and factory-gate protection. This record is a narrower route within CPC 49941; TIG is the chosen applicable route, not a claim that all motorcycles use TIG.

Exclude complete motorcycles/sidecars, engine/powertrain, bearings, suspension, wheels, fuel tanks, body panels, bolted rear subframes and uninstalled accessories; aluminium/cast/composite/CrMo frames, MIG/laser/brazed or undeclared joining routes, repaired frames, vehicle assembly, phosphating/painting/powder-coating, riding/transport services and end of life. Any alternate material, joining or coated supply state needs separate methodology assessment.

Manufacturer process descriptions support separating welded frame, painting and complete-vehicle assembly only. They do not establish low-carbon grade, TIG process, net M or frame-only factory inventory. TWI provides generic TIG process identity and optional filler/gas context; actual factory procedures establish applicability. No source supports a universal frame mass, lifetime or crash/fatigue acceptance range. Scientific review remains pending. Receipt-to-acceptance foreground is not complete cradle-to-gate without compatible verified upstream links.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.transport-equipment.motorcycle-structural-parts
classification_refs	CPC 3.0 49941; narrower bare steel TIG motorcycle main-frame route; context only
covered_products	New complete bare motorcycle structural main frames made from declared low-carbon steel tubes and integral steel mounts by actual argon-shielded TIG welding. Include the drawing-defined steering head and integral engine/swingarm mounting datums, received-versus-fabricated subpart scope, applicable mechanical finishing and cleaning, dimensional/weld/net-mass acceptance and factory-gate protection. This record is a narrower route within CPC 49941; TIG is the chosen applicable route, not a claim that all motorcycles use TIG.
excluded_products	Exclude complete motorcycles/sidecars, engine/powertrain, bearings, suspension, wheels, fuel tanks, body panels, bolted rear subframes and uninstalled accessories; aluminium/cast/composite/CrMo frames, MIG/laser/brazed or undeclared joining routes, repaired frames, vehicle assembly, phosphating/painting/powder-coating, riding/transport services and end of life. Any alternate material, joining or coated supply state needs separate methodology assessment.
representative_product	One accepted complete drawing-defined main frame of positive measured M
production_route	Stock/subpart preparation; fixture TIG welding; conditional finishing/cleaning; dimensional/weld/physical mass acceptance; conditional protection
market_state	New accepted bare uncoated main frame before vehicle assembly

3. Reference Flow

Field	Value
What	Manufacture one specified complete bare structural main frame
How much	1 kg accepted frame net mass; per-unit collection normalized using measured M
How well	Actual drawing/datums, qualified weld route and dimensional/weld acceptance; equal mass is not equal structural performance
How long or cycle	One manufacturing/acceptance cycle; no distance, crash cycle, riding lifetime or service unit
reference_flow_link	finished_frame

Field	Value
Reference amount	1
Reference product flow	Accepted uncoated TIG-welded steel motorcycle main frame
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	manufacturer/model/site/period; frame part number/revision/serial and controlled drawing; low-carbon grade, tube section/wall and stock supply state; actual integral steering-head/mount completeness, received subparts versus fabrication; argon supply and actual TIG procedure, weld map/filler/electrode specification and qualifications; actual finishing/cleaning/residual oil; dimensional/weld inspection and release; actual same-configuration calibrated net frame mass M kg, scale/tare/uncertainty; actual stock/meter/gas/waste records, rework/allocation and supplier upstream compatibility; packing/rack exclusion and data gaps

M includes actual welded integral mounts/steering head and retained weld metal/residual oil in the declared bare state. Exclude engines, fixtures, loose bearings, bolt-on rear subframe, spares, racks and packaging. Required qualifiers must be in concrete dataset metadata/notes; absent qualifiers make the reference incomplete. Catalogue bike/frame mass, calculated tube volume/density or shipping gross weight cannot establish M.

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	M = accepted net mass of one complete unit of the same configuration in kg; collect using cp_mass.
mass_record_provenance	cp_mass	Mass	kg	Complete unit here is one complete specified main frame, not a motorcycle. Physically weigh each accepted same-part/revision frame on a suitable calibrated scale with measured fixture tare; record weld/mount completeness, cleaning/oil state, date/operator, uncertainty and positive net M linked to signed release. Same-configuration batch counts need actual count and traceable frame mass measurements; no assumed weight. Reconcile tube/plate, filler incorporation, rejects/chips and delivered frame state without counting shielding gas as incorporated mass.
energy_units	each electricity row	Net calorific value	MJ	Use verified energy-unit conversion 1 kWh = 3.6 MJ; preserve actual intake voltage/provider, welding/machine/ventilation idle-active meter boundaries. No arc current, nameplate power or guessed welding duration replaces actual metered electricity.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Specified uncoated low-carbon tube/plate and received finished subparts
starting_condition_role	Receipt-to-accepted-bare-main-frame operating manufacturing foreground
product_classification_scope	New complete bare motorcycle structural main frames made from declared low-carbon steel tubes and integral steel mounts by actual argon-shielded TIG welding. Include the drawing-defined steering head and integral engine/swingarm mounting datums, received-versus-fabricated subpart scope, applicable mechanical finishing and cleaning, dimensional/weld/net-mass acceptance and factory-gate protection. This record is a narrower route within CPC 49941; TIG is the chosen applicable route, not a claim that all motorcycles use TIG.
recursive_input_rule	Never input the same finished frame to its own manufacture. Received finished steering head/bracket replaces contained stock and machining; own internal subpart is not a boundary input
upstream_dataset_requirement	Match actual grade/section, supplied subpart completeness, TIG filler/electrode/gas state, cleaning concentration, site/period/provider and original reference property/unit; disclose incompatible links
disclosure	manufacturer/model/site/period; frame part number/revision/serial and controlled drawing; low-carbon grade, tube section/wall and stock supply state; actual integral steering-head/mount completeness, received subparts versus fabrication; argon supply and actual TIG procedure, weld map/filler/electrode specification and qualifications; actual finishing/cleaning/residual oil; dimensional/weld inspection and release; actual same-configuration calibrated net frame mass M kg, scale/tare/uncertainty; actual stock/meter/gas/waste records, rework/allocation and supplier upstream compatibility; packing/rack exclusion and data gaps

rule_id	Applies to	Rule	source_ids
boundary_manufacture	all stages	Include actual preparation/welding, applicable finishing/cleaning, attributable rework, inspection/net weighing and protection. Avoid duplicate outsourced-service exchanges and their contained resources. Later coating, complete bike assembly and use lie outside. Long-lived machines/fixtures and factory infrastructure are excluded from core operating foreground; disclose and add any separately modelled capital contribution with actual traced applicability.
boundary_completeness	actual weld/production records	Required welding does not make every filler/electrode/cleaner card mandatory. Add each actual tube lubricant/coolant, heat carrier, cutting tool, NDT chemical, welding filter dust and verified individual emission omitted from candidate cards with original specification/metrology. Retain actual welding extraction/filtration utilities and consumed electrode records. Do not infer NOx, ozone, iron/manganese fume or tungsten release merely from an arc; assign species, destination and quantity only when evidenced.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
preparation	Tube and bracket preparation	required	Actual specified steel tubular frame	foreground	one accepted same-configuration finished unit, normalized using M
welding	Fixture fit-up and TIG frame welding	required	Declared argon-shielded TIG steel frame route	foreground	one accepted same-configuration finished unit, normalized using M
finishing	Mechanical weld finishing and datum machining	conditional	Only actual drawing-required post-weld operations	foreground	one accepted same-configuration finished unit, normalized using M
cleaning	Conditional bare-frame cleaning	conditional	Only actual cleaning before bare-frame acceptance	foreground	one accepted same-configuration finished unit, normalized using M
acceptance	Frame dimensional, weld and mass acceptance	required	Every accepted complete main frame	foreground	one accepted same-configuration finished unit, normalized using M
packing	Factory-gate protection	conditional	Only actual declared factory-gate protection	foreground	one accepted same-configuration finished unit, normalized using M

Preparation feeds fixture fit-up/TIG welding, then actual finishing/cleaning and frame acceptance; protection is conditional. Every card needs actual route/chemistry applicability. Do not count received subpart and its contained stock together.

Process: Tube and bracket preparation (preparation)

Receive traceable uncoated low-carbon tube, plate, steering head and bracket states. Cut, notch, bend and machine only actual in-house steps using drawing-controlled geometry. Purchased formed subparts replace their contained stock and processing. Record actual coolant/tool wear and metal chips separately.

Inputs

Product flows

Uncoated low-carbon steel structural tube (steel_tube)

Actual drawing grade, section/wall and tube manufacturing state; measured net issue/return. Not CrMo, stainless, aluminium or coated tube.

• Selected flow: Uncoated low-carbon steel structural tube
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Uncoated low-carbon steel bracket plate (steel_plate)

Only actual in-house bracket plate stock; externally finished bracket replaces its contained plate.

• Selected flow: Uncoated low-carbon steel bracket plate
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Machined low-carbon steel motorcycle steering-head tube (steering_head)

Only actually received finished steering-head tube, no installed bearings; suppress if made in-house from included tube.

• Selected flow: Machined low-carbon steel motorcycle steering-head tube
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Formed low-carbon steel motorcycle engine-mount bracket (mounting_bracket)

Only actually received specified formed bracket; not engine itself or a collection of accessories; suppress contained plate/formation.

• Selected flow: Formed low-carbon steel motorcycle engine-mount bracket
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Factory-intake alternating-current electricity (preparation_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Outputs

Waste flows

Low-carbon steel machining chip waste (preparation_steel_chips)

Only measured segregated chips/offcuts from actual stage and destination; do not duplicate transferred chips or count rework as accepted output.

• Selected flow: Low-carbon steel machining chip waste
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_preparation.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_preparation
• Sources: yamaha

Process: Fixture fit-up and TIG frame welding (welding)

Record actual weld map, fit-up fixture, approved plant welding procedure, operator/qualification and actual arc/pre/post-flow jobs, net shielding-gas consumption and filler only when used. TIG source explains process identity, not a universal motorcycle factory recipe. No MIG, brazing or laser substitution. Retain actual extraction/filter records; do not invent inevitable species emissions.

Inputs

Product flows

Gaseous argon TIG shielding supply (argon)

Only actual pure argon gas with documented supplier state, weighed cylinder net consumption/returns or actual compatible metrology. No unspecified gas density factor or liquid-argon substitution.

• Selected flow: Gaseous argon TIG shielding supply
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_welding.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_welding
• Sources: twi

ER70S-6 carbon-steel TIG filler rod (filler_rod)

Only if actual compatible plant weld procedure uses this filler; exact spec, net issue/return and incorporated mass. Autogenous welding omits filler; no universal grade prescribed.

• Selected flow: ER70S-6 carbon-steel TIG filler rod
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_welding.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_welding
• Sources: twi

Pure tungsten TIG electrode (tungsten_electrode)

Only actual pure tungsten electrode wear/issue; doped tungsten requires different identity; no automatic thoriated electrode.

• Selected flow: Pure tungsten TIG electrode
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_welding.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_welding
• Sources: twi

Factory-intake alternating-current electricity (welding_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_welding.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_welding
• Sources: twi

Process: Mechanical weld finishing and datum machining (finishing)

Record actual deburring/grinding, bore/datum machining, distortion correction and associated rejection/rework. Do not presume heat treatment, stress relief, sand blasting or removal of every weld bead. Use actual abrasive/coolant identity and collected residues.

Inputs

Product flows

Aluminium-oxide bonded grinding disc (abrasive_disc)

Only actual complete bonded abrasive disc composition and measured consumption; not pure bulk alumina.

• Selected flow: Aluminium-oxide bonded grinding disc
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_finishing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_finishing
• Sources: bmw

Factory-intake alternating-current electricity (finishing_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_finishing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_finishing
• Sources: bmw

Outputs

Waste flows

Low-carbon steel machining chip waste (finishing_steel_chips)

Only measured segregated chips/offcuts from actual stage and destination; do not duplicate transferred chips or count rework as accepted output.

• Selected flow: Low-carbon steel machining chip waste
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_finishing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_finishing
• Sources: bmw

Spent aluminium-oxide grinding disc waste (spent_disc)

Only actual transferred used disc retaining steel contamination, measured net waste; not elementary alumina.

• Selected flow: Spent aluminium-oxide grinding disc waste
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_finishing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_finishing
• Sources: bmw

Process: Conditional bare-frame cleaning (cleaning)

Declare actual cleaning ingredient/concentration, water/solvent balance and drying. Aqueous and IPA cards are separate conditional examples, never a required recipe. Keep actual residual oil state. Powder coating, phosphating and paint curing are outside this uncoated product gate.

Inputs

Product flows

Process Water (cleaning_water)

Only actual supplied process water measured mass, not natural withdrawal or wastewater.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Anhydrous isopropanol cleaning solvent (isopropanol)

Only actual CAS67-63-0 anhydrous IPA, net issues/recovery; not 70% disinfectant or ethanol.

• Selected flow: Anhydrous isopropanol cleaning solvent
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Nonwoven polyester cleaning wipe (cleaning_wipe)

Only actual finished wipe net dry mass; do not substitute converting substrate.

• Selected flow: Nonwoven polyester cleaning wipe
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Factory-intake alternating-current electricity (cleaning_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Outputs

Waste flows

Aqueous oily steel-frame cleaning wastewater (cleaning_effluent)

Only actual wastewater treatment transfer with measured composition/destination, not natural water release.

• Selected flow: Aqueous oily steel-frame cleaning wastewater
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Isopropanol-contaminated polyester wipe waste (spent_wipe)

Only actual used wipe transfer with retained IPA measured, distinct from air release.

• Selected flow: Isopropanol-contaminated polyester wipe waste
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Outputs

Elementary flows

isopropanol (isopropanol_air)

Only evidenced CAS67-63-0 immediate air/unspecified release from species-specific emission measurement or closed solvent balance; not all solvent issue, indoor/water/long-term release. No obligatory emission.

• Selected flow: isopropanol fe0acd60-3ddc-11dd-a843-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_cleaning.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_cleaning
• Sources: yamaha

Process: Frame dimensional, weld and mass acceptance (acceptance)

Control part/revision, steering-head and swingarm/engine mounting datums, drawing dimensions, weld inspection scope and actual release criteria. Actual NDT method, personnel and consumables require records; no universal destructive fatigue/crash test or invented weld limit. Weigh the accepted complete bare main frame physically, excluding fixtures and shipping protection.

Inputs

Product flows

Factory-intake alternating-current electricity (acceptance_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_acceptance.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_acceptance
• Sources: bmw

Outputs

Product flows

Accepted uncoated TIG-welded steel motorcycle main frame (finished_frame)

One specified complete structural main frame with welded steering head and integral specified mounts; exclude engine, bearings, suspension, bolt-on rear subframe, temporary fixture, packaging and loose spares.

• Selected flow: Accepted uncoated TIG-welded steel motorcycle main frame
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: fixed_value
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: method_formula
• Collection protocol: cp_mass
• Sources: bmw

Process: Factory-gate protection (packing)

Measure each actual protection item; exclude rack/dunnage and packaging from M. Trace returnable rack reuse and separately attribute actual service, never assume lifetime.

Inputs

Product flows

Corrugated cardboard box (carton)

Only actual measured corrugated shipping box, excluded from M.

• Selected flow: Corrugated cardboard box
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_packing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_packing
• Sources:

Low-density polyethylene foil (PE-LD) (protective_film)

Only actual LDPE protection net issue, excluded from frame M.

• Selected flow: Low-density polyethylene foil (PE-LD) 2cecd3a7-d90e-44b4-aec5-1d9dfb907477
• Flow property / unit: Mass / kg
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_packing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_packing
• Sources:

Factory-intake alternating-current electricity (packing_electricity)

Only metered attributable actual supply kWh converted to MJ, with voltage/provider and actual active/idle shared driver. No rated welding amperage multiplied by guessed time.

• Selected flow: Factory-intake alternating-current electricity
• Flow property / unit: Net calorific value / MJ
• Amount rule: Apply normalize_mass to q_item; reference_mass; cp_packing.
• Value mode: foreground_record
• Specificity: site_specific
• Normalization basis: per 1 kg reference flow; collected per one accepted finished unit
• Basis kind: process_output
• Evidence kind: collected_record
• Collection protocol: cp_packing
• Sources:

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_orders	shared resources	Directly attribute configured stock/filler/gas issues, actual machine/welding/ventilation meters and inspection including rework. For inseparable resources use measured causal machine/fixture occupation and actual load: share = order driver / sum of covered order drivers. Keep covered period/denominator; equal frame counts, catalogue mass or rated amperage alone are not default drivers.
allocation_qualification	qualification and accepted production	Separate independent R&D/prototype from actual production qualification. Attribute applicable destructive weld/fatigue qualification to actual covered orders with traced scope, driver and sensitivity; destroyed frames do not enter accepted output. Actual per-frame inspection is direct. No assumed test schedule, fixture lifetime or universal qualification allocation.
allocation_recovery	scrap, rejects and rework	Count each physical scrap/chip/waste transfer once, with actual destination and period balance. Internal rework stays with accepted production. Recyclability does not justify avoided-steel or disposal credits. Actual saleable co-product allocation requires evidenced causal/economic originals and sensitivity.

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_mass	acceptance	reference_product	accepted physical weighing record	model; configuration; serial number; accepted net mass M; part number/revision; frame scale reading; fixture tare; oil/cleaning state; calibration/uncertainty; drawing; signed release	Weigh the accepted complete unit on a calibrated scale, excluding transport packaging; reconcile the same configuration and acceptance record.	kg	each accepted unit	actual manufacturing and acceptance period	declared frame acceptance gate	accepted net mass per unit	actual calibrated physical single-frame weighing, measured tare and controlled drawing/release
cp_preparation	preparation	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read actual calibrated stock issues/returns, tube/bend/machine jobs, chip transfer and meters	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers
cp_welding	welding	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read actual weld procedure/map, metered power/gas, filler net issues, electrode wear and filter/waste records	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers
cp_finishing	finishing	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read finishing/machining jobs, actual disc wear/chips, correction/rework and meters	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers
cp_cleaning	cleaning	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read actual recipe/SDS, net cleaning supplies, drying meters, solvent balances and waste transfers	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers
cp_acceptance	acceptance	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read controlled drawing, dimensional/weld inspection, calibration, actual physical net weighing and release	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers
cp_packing	packing	inventory	actual stage exchange records	model; configuration; serial/batch; part/revision; exact exchange/SDS; net issues/returns/stocks; kg; metered kWh; waste destination; emission method; actual shared driver	Read actual packaging issues/returns, tare and rack reuse movements	kg for Mass rows; MJ for electrical-energy rows	each accepted unit and actual production batch	actual manufacturing and acceptance period	declared factory/subcontractor gates	attribute measured period exchange / accepted units of the same configuration	original jobs/drawings/SDS, calibrated scales/meters, acceptance and transfers

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_mass	all inventory rows	q_ref = q_item / M; q_item = exchange amount per one accepted finished unit; q_ref = exchange amount per 1 kg reference flow.	q_item; M; cp_mass	q_ref

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
quality_mass	cp_mass	Use mass_record_provenance actual physical frame weighing, same part/revision/completeness, calibrated scale/tare/uncertainty and positive M kg. Reconcile welded filler/mounts and residual oil, excluding temporary fixture, engine, bolt-on rear subframe and protection. No tube-density sum or catalogue mass substitutes; missing original weighing requires scientific/data review.	actual weighing/calibration, frame drawing and release
quality_identity	every exchange	Check one physical/chemical identity and actual supplied grade/route/concentration. Steering-head tube is not generic motorcycle accessories; ER70S-6 is not stainless MIG wire; pure tungsten is not thoriated tungsten; gas argon is not liquid argon; IPA solvent is not disinfectant. Preserve original public property/unit and media; unresolved identity stays specific.	actual supplier specifications/SDS and public identity records
quality_weld	cp_welding; cp_acceptance	Retain actual weld map, procedure qualification, filler compatibility, preparation/fit-up, gas supply, electrode specification, controlled drawing datums and actual visual/NDT release plan. Record distortion, cracks, lack of fusion and other actual defects against producer-defined criteria. No universal frame geometry, fatigue/crash limit, weld energy or inspection method inferred from generic TIG guidance.	actual qualified procedure/drawing, metrology/NDT/acceptance originals
quality_balance	stock, filler, gas, solvent, water and energy	Reconcile actual stock/net issue, incorporated frame and filler, rejects/chips/returns and cylinder gas net consumption separately. Measured gas volume needs original pressure/temperature/state and justified conversion; no default gas density. Water supply, treatment wastewater and environmental withdrawal/release are distinct. IPA-air requires measured species/medium or closed balance with retained/recovered solvent, not all issues. Welding extraction/filter dust and each species release require actual evidence before dataset completion.	actual stock/gas/material/species balances, meters and waste records
quality_coverage	actual dataset and upstream links	Distinguish measured, calculated, missing and evidenced not_applicable. Audit actual complete weld/production map, supplier-contained subpart processing, NDT/drying/coolant/filter exchanges missing from cards, capital exclusions, allocation and uncertainty. Compatible verified upstream links are needed for full cradle-to-gate claims. Contract check cannot establish actual factory completion or scientific approval.	actual full manufacturing map and transparent gap register

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference	reference/output	Require current positive actual M kg with cp_mass. Exact reference name equals finished_frame; empty UUID registers that precise row in unresolved_flow_identities. Actual bare main-frame completeness excludes engine/fixtures/packing/rear subframe; no vehicle gross mass.
validate_basis	all rows/protocols	Check identical ordered lower-case row/rule/protocol IDs and actual generated references in both languages. q_item per accepted finished unit, M kg, explicit normalize_mass and identical same-configuration counts. Never rewrite public number/area/energy properties as Mass.
validate_route	weld and production map	Require actual low-carbon tube/stock route, TIG argon procedure, exact filler/electrode conditions, received-head/bracket containment, applicable finishing/NDT and actual emission evidence. Manufacturer frame/vehicle example is not this configuration’s empirical inventory. Missing actual records or applicability requires review.
validate_use	dataset use	Disclose exact frame drawing/configuration, uncoated gate, mass evidence, omitted actual exchanges, unresolved identities and upstream compatibility. Equal kg is not equal frame stiffness, fatigue/crash performance or life. Candidate is not published or scientifically approved.

10. Published Dataset Profile

Field	Value
dataset_role	secondary_dataset and background_dataset after actual data completion/review
downstream_use	Specified bare motorcycle main-frame input into separately bounded coating/vehicle manufacture
allowed_use	Compare matching configured frame route/gate per kg with actual mass, acceptance scope and upstream links disclosed
excluded_use	Exclude complete motorcycles/sidecars, engine/powertrain, bearings, suspension, wheels, fuel tanks, body panels, bolted rear subframes and uninstalled accessories; aluminium/cast/composite/CrMo frames, MIG/laser/brazed or undeclared joining routes, repaired frames, vehicle assembly, phosphating/painting/powder-coating, riding/transport services and end of life. Any alternate material, joining or coated supply state needs separate methodology assessment.
required_metadata	manufacturer/model/site/period; frame part number/revision/serial and controlled drawing; low-carbon grade, tube section/wall and stock supply state; actual integral steering-head/mount completeness, received subparts versus fabrication; argon supply and actual TIG procedure, weld map/filler/electrode specification and qualifications; actual finishing/cleaning/residual oil; dimensional/weld inspection and release; actual same-configuration calibrated net frame mass M kg, scale/tare/uncertainty; actual stock/meter/gas/waste records, rework/allocation and supplier upstream compatibility; packing/rack exclusion and data gaps
required_quality_disclosure	Measured/calculated/missing data, weighing/weld/inspection originals, identity and scope gaps, capital exclusion, allocation and uncertainty; candidate and scientific review pending
update_trigger	Actual frame drawing, grade/section, supply subpart state, joining/filler/gas/electrode route, finishing/coating gate, mass/inspection, site or upstream changes

11. Data Sources

Source id	Type	Reference	Used for
yamaha	literature	Yamaha Motor manufacturing jobs/processes	HTML プレス、溶接、塗装、ユニット組付 and 車体・ユニット組立: manufacturer forming/welding/painting and assembly context. Does not identify actual frame steel, TIG procedure, frame M or factory intensity. Separate outboard/engine and finished-vehicle tests are not frame-only evidence. Undated description supports qualitative process separation only.
bmw	literature	BMW Group Plant Berlin	HTML Welding shop, Assembly and Paint shop headings distinguish frame manufacture, engine/frame marriage and later frame powder coating. Aluminium-tank welding, engine tolerance, complete-bike dynamometer checks and plant counts cannot be transferred to this bare low-carbon TIG main frame. No numeric constraints adopted.
twi	extension_guidance	TWI: Tungsten inert gas TIG or GTA welding	HTML Process characteristics, Electrode and Shielding gas paragraphs: non-consumable tungsten, inert shielding and separately added optional filler; argon can weld steel. Generic process guidance, not a motorcycle factory specification or mandatory pure-tungsten/filler recipe. No gas rate, electrode life, power, efficiency, weld qualification or emission factors adopted.