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A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS A04 IRON CASTINGS A05 METALLIC-COATED IRON AND STEEL PRODUCTS B01 ELECTRICAL CONDUCTORS B05 COPPER AND COPPER ALLOYS B07 LIGHT METALS AND ALLOYS C01 CEMENT C04 VITRIFIED CLAY PIPE C07 LIME AND LIMESTONE C09 CONCRETE AND CONCRETE AGGREGATES C11 GYPSUM AND RELATED BUILDING MATERIALS AND SYSTEMS C12 MORTARS AND GROUTS FOR UNIT MASONRY C13 CONCRETE PIPE C14 GLASS AND GLASS PRODUCTS C15 MANUFACTURED MASONRY UNITS C16 THERMAL INSULATION C17 FIBER-REINFORCED CEMENT PRODUCTS C18 DIMENSION STONE C21 CERAMIC WHITEWARES AND RELATED PRODUCTS C24 BUILDING SEALS AND SEALANTS C27 PRECAST CONCRETE PRODUCTS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D04 ROAD AND PAVING MATERIALS D07 WOOD D08 ROOFING AND WATERPROOFING D09 ELECTRICAL AND ELECTRONIC INSULATING MATERIALS D11 RUBBER D14 ADHESIVES D18 SOIL AND ROCK D20 PLASTICS D35 GEOSYNTHETICS E05 FIRE STANDARDS E06 PERFORMANCE OF BUILDINGS E33 BUILDING AND ENVIRONMENTAL ACOUSTICS E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS E60 SUSTAINABILITY F01 ELECTRONICS F06 RESILIENT FLOOR COVERINGS F13 PEDESTRIAN/WALKWAY SAFETY AND FOOTWEAR F16 FASTENERS F17 PLASTIC PIPING SYSTEMS F33 DETENTION AND CORRECTIONAL FACILITIES F36 TECHNOLOGY AND UNDERGROUND UTILITIES G03 WEATHERING AND DURABILITY C14 GLASS AND GLASS PRODUCTS C21 CERAMIC WHITEWARES AND RELATED PRODUCTS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D06 PAPER AND PAPER PRODUCTS D09 ELECTRICAL AND ELECTRONIC INSULATING MATERIALS D10 PACKAGING D11 RUBBER D12 SOAPS AND OTHER DETERGENTS D13 TEXTILES D14 ADHESIVES D15 ENGINE COOLANTS AND RELATED FLUIDS D20 PLASTICS D21 POLISHES D31 LEATHER E12 COLOR AND APPEARANCE E18 SENSORY EVALUATION E20 TEMPERATURE MEASUREMENT E35 PESTICIDES, ANTIMICROBIALS, AND ALTERNATIVE CONTROL AGENTS E41 LABORATORY APPARATUS E53 ASSET MANAGEMENT E57 3D IMAGING SYSTEMS F02 FLEXIBLE BARRIER PACKAGING F05 BUSINESS IMAGING PRODUCTS F06 RESILIENT FLOOR COVERINGS F08 SPORTS EQUIPMENT, PLAYING SURFACES, AND FACILITIES F09 TIRES F10 LIVESTOCK, MEAT, AND POULTRY EVALUATION SYSTEMS F11 VACUUM CLEANERS F13 PEDESTRIAN/WALKWAY SAFETY AND FOOTWEAR F14 FENCES F15 CONSUMER PRODUCTS F16 FASTENERS F24 AMUSEMENT RIDES AND DEVICES F26 FOOD SERVICE EQUIPMENT F27 SNOW SKIING F37 LIGHT SPORT AIRCRAFT F43 LANGUAGE SERVICES AND PRODUCTS F44 GENERAL AVIATION AIRCRAFT A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS A04 IRON CASTINGS A05 METALLIC-COATED IRON AND STEEL PRODUCTS A06 MAGNETIC PROPERTIES B01 ELECTRICAL CONDUCTORS B02 NONFERROUS METALS AND ALLOYS B05 COPPER AND COPPER ALLOYS B07 LIGHT METALS AND ALLOYS B08 METALLIC AND INORGANIC COATINGS B09 METAL POWDERS AND METAL POWDER PRODUCTS B10 REACTIVE AND REFRACTORY METALS AND ALLOYS C03 CHEMICAL-RESISTANT NONMETALLIC MATERIALS C08 REFRACTORIES C28 ADVANCED CERAMICS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D20 PLASTICS D30 COMPOSITE MATERIALS E01 ANALYTICAL CHEMISTRY FOR METALS, ORES, AND RELATED MATERIALS E04 METALLOGRAPHY E07 NONDESTRUCTIVE TESTING E08 FATIGUE AND FRACTURE E12 COLOR AND APPEARANCE E13 MOLECULAR SPECTROSCOPY AND SEPARATION SCIENCE E28 MECHANICAL TESTING E29 PARTICLE AND SPRAY CHARACTERIZATION E37 THERMAL MEASUREMENTS E42 SURFACE ANALYSIS F01 ELECTRONICS F34 ROLLING ELEMENT BEARINGS F40 DECLARABLE SUBSTANCES IN MATERIALS F42 ADDITIVE MANUFACTURING TECHNOLOGIES G01 CORROSION OF METALS G03 WEATHERING AND DURABILITY D21 POLISHES D26 HALOGENATED ORGANIC SOLVENTS AND FIRE EXTINGUISHING AGENTS D33 PROTECTIVE COATING AND LINING WORK FOR POWER GENERATION FACILITIES E05 FIRE STANDARDS E27 HAZARD POTENTIAL OF CHEMICALS E30 FORENSIC SCIENCES E34 OCCUPATIONAL HEALTH AND SAFETY E35 PESTICIDES, ANTIMICROBIALS, AND ALTERNATIVE CONTROL AGENTS E52 FORENSIC PSYCHOPHYSIOLOGY E54 HOMELAND SECURITY APPLICATIONS E58 FORENSIC ENGINEERING F06 RESILIENT FLOOR COVERINGS F08 SPORTS EQUIPMENT, PLAYING SURFACES, AND FACILITIES F10 LIVESTOCK, MEAT, AND POULTRY EVALUATION SYSTEMS F12 SECURITY SYSTEMS AND EQUIPMENT F13 PEDESTRIAN/WALKWAY SAFETY AND FOOTWEAR F15 CONSUMER PRODUCTS F18 ELECTRICAL PROTECTIVE EQUIPMENT FOR WORKERS F23 PERSONAL PROTECTIVE CLOTHING AND EQUIPMENT F26 FOOD SERVICE EQUIPMENT F32 SEARCH AND RESCUE F33 DETENTION AND CORRECTIONAL FACILITIES G04 COMPATIBILITY AND SENSITIVITY OF MATERIALS IN OXYGEN ENRICHED ATMOSPHERES D08 ROOFING AND WATERPROOFING D18 SOIL AND ROCK D19 WATER D20 PLASTICS D22 AIR QUALITY D34 WASTE MANAGEMENT D35 GEOSYNTHETICS E06 PERFORMANCE OF BUILDINGS E44 SOLAR, GEOTHERMAL AND OTHER ALTERNATIVE ENERGY SOURCES E47 E48 BIOENERGY AND INDUSTRIAL CHEMICALS FROM BIOMASS E50 ENVIRONMENTAL ASSESSMENT, RISK MANAGEMENT AND CORRECTIVE ACTION E60 SUSTAINABILITY F20 HAZARDOUS SUBSTANCES AND OIL SPILL RESPONSE F40 DECLARABLE SUBSTANCES IN MATERIALS G02 WEAR AND EROSION B01 ELECTRICAL CONDUCTORS C26 NUCLEAR FUEL CYCLE D02 PETROLEUM PRODUCTS, LIQUID FUELS, AND LUBRICANTS D03 GASEOUS FUELS D05 COAL AND COKE D19 WATER D27 ELECTRICAL INSULATING LIQUIDS AND GASES D33 PROTECTIVE COATING AND LINING WORK FOR POWER GENERATION FACILITIES E10 NUCLEAR TECHNOLOGY AND APPLICATIONS E44 SOLAR, GEOTHERMAL AND OTHER ALTERNATIVE ENERGY SOURCES E48 BIOENERGY AND INDUSTRIAL CHEMICALS FROM BIOMASS A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS C01 CEMENT C09 CONCRETE AND CONCRETE AGGREGATES D02 PETROLEUM PRODUCTS, LIQUID FUELS, AND LUBRICANTS D03 GASEOUS FUELS D04 ROAD AND PAVING MATERIALS D15 ENGINE COOLANTS AND RELATED FLUIDS D18 SOIL AND ROCK D24 CARBON BLACK D35 GEOSYNTHETICS E12 COLOR AND APPEARANCE E17 VEHICLE - PAVEMENT SYSTEMS E21 SPACE SIMULATION AND APPLICATIONS OF SPACE TECHNOLOGY E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS F03 GASKETS F07 AEROSPACE AND AIRCRAFT F09 TIRES F16 FASTENERS F25 SHIPS AND MARINE TECHNOLOGY F37 LIGHT SPORT AIRCRAFT F38 UNMANNED AIRCRAFT SYSTEMS F39 AIRCRAFT SYSTEMS F41 UNMANNED MARITIME VEHICLE SYSTEMS (UMVS) F44 GENERAL AVIATION AIRCRAFT F45 DRIVERLESS AUTOMATIC GUIDED INDUSTRIAL VEHICLES D10 PACKAGING D11 RUBBER E31 HEALTHCARE INFORMATICS E35 PESTICIDES, ANTIMICROBIALS, AND ALTERNATIVE CONTROL AGENTS E54 HOMELAND SECURITY APPLICATIONS E55 MANUFACTURE OF PHARMACEUTICAL PRODUCTS E56 NANOTECHNOLOGY F02 FLEXIBLE BARRIER PACKAGING F04 MEDICAL AND SURGICAL MATERIALS AND DEVICES F29 ANESTHETIC AND RESPIRATORY EQUIPMENT F30 EMERGENCY MEDICAL SERVICES G04 COMPATIBILITY AND SENSITIVITY OF MATERIALS IN OXYGEN ENRICHED ATMOSPHERES C07 LIME AND LIMESTONE D14 ADHESIVES D16 AROMATIC HYDROCARBONS AND RELATED CHEMICALS D20 PLASTICS D26 HALOGENATED ORGANIC SOLVENTS AND FIRE EXTINGUISHING AGENTS D28 ACTIVATED CARBON D32 CATALYSTS E13 MOLECULAR SPECTROSCOPY AND SEPARATION SCIENCE E15 INDUSTRIAL AND SPECIALTY CHEMICALS E27 HAZARD POTENTIAL OF CHEMICALS E35 PESTICIDES, ANTIMICROBIALS, AND ALTERNATIVE CONTROL AGENTS F40 DECLARABLE SUBSTANCES IN MATERIALS E11 QUALITY AND STATISTICS E36 ACCREDITATION & CERTIFICATION E43 SI PRACTICE E55 MANUFACTURE OF PHARMACEUTICAL PRODUCTS E56 NANOTECHNOLOGY F42 ADDITIVE MANUFACTURING TECHNOLOGIES
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EnRoute

EnRoute

Of SI and Standards

Including Units in Standards

Whether current versions of time-honored standards such as specifications for steel tee rails and cement or brand new guides for search and rescue certification groups and tissue scaffold permeability, ASTM International standards are subject to the dictates of Form and Style for ASTM Standards. That includes use of the International System of Units, commonly called SI units.

Part H of today’s Form and Style, the guidance document for the format of ASTM standards, states, “ASTM technical committees are urged to give diligent consideration to the use of rationalized SI (metric) units in their standards.” The manual also indicates that “each technical committee shall have the option of using rationalized SI units, or rationalized inch-pound units, or both, as the standard units of measure.”

ASTM staff members are working with committees to bring into compliance any standards that have yet to catch up with Part H requirements. Over the past several years ASTM has tagged all 12,000 standards as either solely SI, combined, inch-pound, no units or not in compliance. Staff is working with committees to address standards that are not in compliance with one of the Form and Style options.

Consequently, a great deal of progress has been made in ensuring that committees use SI units, non-SI units or both, appropriately. This effort has revealed that about 17 percent of standards, such as most terminology standards, do not use units. Of the standards that do use units, a majority, about 51 percent, use SI only; 33 percent use non-SI units; and 16 percent use both units combined.

The main issue with noncompliance occurs when inch-pound units are given in parentheses. When this work began in 2008, 66 percent of standards followed Form and Style, and today, this number has increased to 85 percent.

ASTM International staff continues to lend a hand to technical committees where changes can be managed editorially, with the approval of the responsible technical subcommittee, as with the following situations.

Standards that do not have combined units but already contain rationalized SI and inch-pound units can be brought into compliance with a scope change and putting one set of units in brackets. This change is reflected by an epsilon after the standard’s designation number.

Standards listing SI units as primary that actually contain nonrationalized SI and rationalized inch-pound units in parentheses can be made into inch-pound standards with nonrationalized SI in parentheses, with an accompanying editorial scope change and addition of an epsilon.

When scope statements are missing or inaccurately reflect the standard’s unit usage, changes can be made without the addition of an epsilon.

Should a standard need conversions from inch-pound units to SI or combined, however, such conversions must be balloted after you and your fellow task group or subcommittee members make such revisions.

Guidance for these situations can be obtained by contacting your committee’s standards editor. If you’re at a committee meeting and need editorial assistance with units, you can consult with a standards editor on site.

Form and Style’s Part H, “Use of SI Units in ASTM Standards,” describes how to manage units in standards; the manual is available online. Please contact your committee’s staff manager or standards editor if you have questions.

This article appears in the issue of Standardization News.