Overview
ISO 14422:1999 specifies standardized methods and conditions for sampling cold-ramming pastes - carbonaceous mixtures used in aluminium production that contain graded aggregate and bonding materials. The standard ensures representative, reproducible sampling of cold-ramming pastes for quality control, testing and contractual verification in aluminium manufacture.
Keywords: ISO 14422:1999, cold-ramming pastes, sampling methods, aluminium manufacture, carbonaceous materials
Key topics and technical requirements
- Scope and definitions: Defines terms such as cold-ramming paste, increment, sample unit and test portion (references ISO 6257 for related sampling terms).
- Apparatus requirements:
- Sampling scoop internal width at least six times the largest particle size.
- Sampling spear internal diameter at least six times the largest particle and length ≈ 10% greater than product depth.
- Quartering cross and suitable sample containers that do not alter the sample.
- Increment and final sample masses:
- Minimum increment mass set by maximum grain size (e.g., larger particles → larger increments).
- Minimum final sample mass depends on consignment size (examples from the standard: up to ~1 t → 8 kg; 1–5 t → 12 kg; 5–10 t → 16 kg; 10–50 t → 24 kg; 50–100 t → 32 kg).
- Sampling techniques:
- Coning and quartering for smaller, manageable items.
- Flattened-heap technique for mixed or larger items.
- Sampling-spear technique for inaccessible or bulk containers.
- In-process sampling guidance (e.g., mixer must be switched off and isolated).
- Sample subdivision and test portions:
- Laboratory and reference samples each at least three times the combined mass required for tests.
- Subdivision by repeated coning and quartering and rules for obtaining test portions and adjusting minor mass differences.
- Documentation: Required sampling report items (manufacturer/product ID, date, container counts/marks, sampling method and reference to ISO 14422:1999, number of increments, sample IDs, unusual observations).
Applications and users
- Quality control and laboratory personnel in aluminium smelters and refractory/consumable suppliers
- Procurement, inspection and conformity assessment teams verifying delivered cold-ramming pastes
- Contracting parties requiring traceable, standardized sampling for dispute resolution or certification
- Test laboratories preparing representative test portions for physical and chemical analysis
Related standards
- ISO 6257 - Carbonaceous materials used in the production of aluminium - Pitch for electrodes - Sampling (normative reference cited in ISO 14422:1999)
Using ISO 14422:1999 helps organizations obtain representative samples, reduce sampling bias, and support reliable test results and contractual transparency in aluminium production workflows.
Open preview (PDF)Carbonaceous materials used in the production of aluminium — Cold-ramming pastes — Methods of sampling
