ISO 6257:2002
Carbonaceous materials used in the production of aluminium — Pitch for electrodes — Sampling
ISO 6257:2002 specifies methods for sampling and preparing samples prior to testing of binder pitch used in the manufacture of electrodes for the electrolytic production of aluminium.
These methods are applicable to grades of pitch in liquid or solid form, the latter having softening points higher than 30 °C (determined according to the method specified in ISO 5940), in bulk, or in a number of containers making up one batch at sites of manufacture, storage, or delivery. Sampling methods and sampling plans for large consignments, or lots, of pitch in liquid form during the loading and unloading of ships are included.
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TitlePage - Carbonaceous materials used in the production of aluminium— Pitch for electrodes— S...
TableofContent - Contents Page
Foreword - Foreword
Introduction - Introduction
Scope - 1 Scope
NormativeReference - 2 Normative references
Clause1 - 4 General procedures and precautions
Subclause2 - 4.1 Sampling methods
Subclause2 - 4.2 Contamination of sample or of pitch being sampled
Subclause2 - 4.3 Sampling for the determination of water content of pitch in solid form
Subclause2 - 4.4 Mass of laboratory and reference samples
Subclause2 - 4.5 Safety precautions
Subclause2 - 4.6 Suspect consignment
Clause1 - 5 Sampling of solid pitch
Subclause2 - 5.1 General considerations
Subclause2 - 5.2 Sampling plan for large quantities of solid pitch
Subclause3 - 5.2.1 Large quantities of solid pitch in containers
Subclause3 - 5.2.2 Consignment of solid pitch not in containers
Subclause2 - 5.3 Practical procedures for taking samples of solid pitch
Subclause3 - 5.3.1 Coarse pitch (including pencil, rod, plate and similar-formed pitch)
Subclause4 - 5.3.1.1 General considerations
Subclause4 - 5.3.1.2 Small containers
Subclause4 - 5.3.1.3 Road or rail vehicles
Subclause4 - 5.3.1.4 Bulk stocks or heaps
Subclause4 - 5.3.1.5 Ships' holds
Subclause3 - 5.3.2 Finer, granular pitch (including prill and flake and similarly formed pitch)
Subclause4 - 5.3.2.1 Method of sampling
Subclause4 - 5.3.2.2 Bulk stocks or heaps
Subclause4 - 5.3.2.3 Bags and sacks
Subclause4 - 5.3.2.4 Casks and kegs
Subclause3 - 5.3.3 Pitch stored in drums or barrels
Clause1 - 6 Soft pitches
Clause1 - 7 Hot liquid pitch
Subclause2 - 7.1 General
Subclause2 - 7.2 Sampling plan for large quantities of liquid pitch
Subclause2 - 7.3 Practical procedures for sampling bulk liquid storage tanks at place of manuf...
Subclause3 - 7.3.1 Vertical tanks not capable of being agitated or circulated
Subclause4 - 7.3.1.1 General
Subclause4 - 7.3.1.2 Thief sampler method
Subclause4 - 7.3.1.3 Weighted can method
Subclause4 - 7.3.1.4 Throw-away container method
Subclause4 - 7.3.1.5 Sampling if sample cocks are fitted
Subclause3 - 7.3.2 Bulk storage tanks with agitation or circulation capability
Subclause2 - 7.4 Practical procedures for sampling from pipelines during loading or unloading ...
Subclause2 - 7.5 Practical procedures for sampling from ships tanks
Subclause2 - 7.6 Practical procedures for sampling from road and rail vehicles
Subclause2 - 7.7 Further preparation of sample(s)
Clause1 - 8 Sample size reduction
Subclause2 - 8.1 General
Subclause2 - 8.2 Hard pitch
Subclause3 - 8.2.1 Riffle method
Subclause3 - 8.2.2 Coning and quartering
Subclause2 - 8.3 Soft pitch
Clause1 - 9 Sample containers
Subclause2 - 9.1 Size
Subclause2 - 9.2 Lever lid tins
Subclause2 - 9.3 Plastic bags
Subclause2 - 9.4 Labelling and storage
Clause1 - 10 Sampling report
Bibliography - Bibliography
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TitlePage - Carbonaceous materials used in the production of aluminium— Pitch for electrodes— S...
TableofContent - Contents Page
Foreword - Foreword
Introduction - Introduction
Scope - 1 Scope
NormativeReference - 2 Normative references
Clause1 - 4 General procedures and precautions
Subclause2 - 4.1 Sampling methods
Subclause2 - 4.2 Contamination of sample or of pitch being sampled
Subclause2 - 4.3 Sampling for the determination of water content of pitch in solid form
Subclause2 - 4.4 Mass of laboratory and reference samples
Subclause2 - 4.5 Safety precautions
Subclause2 - 4.6 Suspect consignment
Clause1 - 5 Sampling of solid pitch
Subclause2 - 5.1 General considerations
Subclause2 - 5.2 Sampling plan for large quantities of solid pitch
Subclause3 - 5.2.1 Large quantities of solid pitch in containers
Subclause3 - 5.2.2 Consignment of solid pitch not in containers
Subclause2 - 5.3 Practical procedures for taking samples of solid pitch
Subclause3 - 5.3.1 Coarse pitch (including pencil, rod, plate and similar-formed pitch)
Subclause4 - 5.3.1.1 General considerations
Subclause4 - 5.3.1.2 Small containers
Subclause4 - 5.3.1.3 Road or rail vehicles
Subclause4 - 5.3.1.4 Bulk stocks or heaps
Subclause4 - 5.3.1.5 Ships' holds
Subclause3 - 5.3.2 Finer, granular pitch (including prill and flake and similarly formed pitch)
Subclause4 - 5.3.2.1 Method of sampling
Subclause4 - 5.3.2.2 Bulk stocks or heaps
Subclause4 - 5.3.2.3 Bags and sacks
Subclause4 - 5.3.2.4 Casks and kegs
Subclause3 - 5.3.3 Pitch stored in drums or barrels
Clause1 - 6 Soft pitches
Clause1 - 7 Hot liquid pitch
Subclause2 - 7.1 General
Subclause2 - 7.2 Sampling plan for large quantities of liquid pitch
Subclause2 - 7.3 Practical procedures for sampling bulk liquid storage tanks at place of manuf...
Subclause3 - 7.3.1 Vertical tanks not capable of being agitated or circulated
Subclause4 - 7.3.1.1 General
Subclause4 - 7.3.1.2 Thief sampler method
Subclause4 - 7.3.1.3 Weighted can method
Subclause4 - 7.3.1.4 Throw-away container method
Subclause4 - 7.3.1.5 Sampling if sample cocks are fitted
Subclause3 - 7.3.2 Bulk storage tanks with agitation or circulation capability
Subclause2 - 7.4 Practical procedures for sampling from pipelines during loading or unloading ...
Subclause2 - 7.5 Practical procedures for sampling from ships tanks
Subclause2 - 7.6 Practical procedures for sampling from road and rail vehicles
Subclause2 - 7.7 Further preparation of sample(s)
Clause1 - 8 Sample size reduction
Subclause2 - 8.1 General
Subclause2 - 8.2 Hard pitch
Subclause3 - 8.2.1 Riffle method
Subclause3 - 8.2.2 Coning and quartering
Subclause2 - 8.3 Soft pitch
Clause1 - 9 Sample containers
Subclause2 - 9.1 Size
Subclause2 - 9.2 Lever lid tins
Subclause2 - 9.3 Plastic bags
Subclause2 - 9.4 Labelling and storage
Clause1 - 10 Sampling report
Bibliography - Bibliography