Standards national

BS 3406, British Standard Method for determinig Particle Size Distribution is a comprehensive standard that includes methods for both incremental and cumulative methods of particle size deterination. Part 1, 1984, covers Recommendations for Gravitational Liquid Sedimentation Mehods for Powders and Suspensions. Part 5, 1985 covers 

Recommendations for Centrifugal Liquid Sedimentation Methods for Powders and Suspensions. 

ASTM C958, 1997 is a Standard Test Method for Particle Size Distribution of Alumina or Quartz by X-ray Monitoring of Gravity Sedimentation covering the size range from 2.5 pm to 10 pm. ASTM B761, 1998 is a Standard Test Method for Particle Size Distribution of 

Refractory Metals and their Compounds by X-ray Monitoring of Gravity Sedimentation. 

DIN 66111, 1973 is a German stadard that covers the principles of gravity sedimentation methods and DIN 66115 covers test methods. 

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The computer subroutines for calculation of vapor-phase and liquid-phase fugacity (activity) coefficients, reference fugac-ities, and molar enthalpies, as well as vapor-liquid and liquid-liquid equilibrium ratios, are described and listed in this Appendix. These are source routines written in American National Standard FORTRAN (FORTRAN IV), ANSI X3.9-1978, and, as such, should be compatible with most computer systems with FORTRAN IV compilers. Approximate storage requirements and CDC 6400 execution times for these subroutines are given in Appendix J. 

The subroutines PARIN and PARCH are source routines written in American National Standard FORTRAN (FORTRAN IV), ANSI X3.9-1978, and should be compatible with most computer systems where input can be taken from logical unit 3. 

British Standards National standards involving lest methods, specifications for quality, safety, performance, etc., and codes of practice. Standards are prepared by the British Standards Institution. Ref. British Standards Year Book. 

At the European level, the national organizations from both the EU (European Union, formerly the EEC) and the EETA (European Free Trade Association) are grouped in the CEN (European Committee for Standardization) and its counterpart for the electrical industries CENELEC. The standards published by these two organizations have authority in all EU countries as well as the EFTA countries who have voted their approval, which means that these standards have replaced their corresponding national standards. 

Standards Institution) in Germany, DIN (Deutsches Institut fur Normung), in the United States, ANSI (American National Standards Institute). 

Association Fran aise de Normalisation Association Fran aise des Techniciens du Petrole i American Institute of Chemical Engineers i American National Standards Institute aniline point... 

Up to now the Reference Block Method and the DGS-Method are world wide the most important techniques for evaluating defect signals in manual Ultrasonic Testing. Even today, individual national standards refer to either one of these two echo evaluation techniques. However, both reflected echo signals from natural defects are compared with an echo from a known reference reflector at the same distance. The result of the evaluation is either... 

This system of national standards of traeeability envisages existence of metrologieal maintenance for measuring faeilities and NDT equipment both during their produetion and in the process of their serviee. This system of standards embraces standards which stipulate ... 

Mukeqee P and Mysels K J 1970 Critical Micelle Concentrations of Aqueous Surfactant Systems (National Standard Reference Data System, National Bureau of Standards Circular No 36) (Springfield, VA National Teehnieal Information Serviee)... 

Source C. E. Moore, National Standard Reference Data Series 34, U.S. Government Printing Office, Washington, D.C.,... 

Specifications, Standards, Quality Control, and Health and Safety Factors. Formerly, there was an Insulation Board Institute representing the insulation board industry, but the decline in the market and number of producers has led to its demise. Currently (ca 1997), the industry is represented by the American Hardboard Association (AHA). Specifications and standards are found in American National Standards Institute (ANSI) standard for CellulosicFiberboard (7). The standard includes descriptions of the various types and classes of ftberboard, as well as requirements for physical and dimensional stabiUty properties. QuaUty control tests are limited to a few basic strength and stabiUty tests, including bending strength, bond strength, and moisture resistance. 

Hardwood and Decorative Plywood ANSI/HPVA HP-1-1994, American National Standards Institute, New York, 1994. 

Storage and Handling ofMnhjdrousMmmonia, Bulletin K61.1, American National Standards Institute, Philadelphia, Pa., 1969. 

The Fire Tests for Flame Resistant Textiles and Films, issued by the National Fire Protection Association (NFPA) ia 1989, is the method most used by iadustrial fire-retardant finishers (ca 1993) (50). It has been approved by the American National Standards Institute. 

Several countries have developed their own standard test methods for cellular plastics, and the International Organization for Standards (ISO) Technical Committee on Plastics TC-61 has been developing international standards. Information concerning the test methods for any particular country or the ISO procedures can be obtained in the United States from the American National Standards Institute. The most complete set of test procedures for cellular plastics, and the most used of any in the world, is that developed by the ASTM these procedures are pubUshed in new editions each year (128). There have been several reviews of ASTM methods and others pertinent to cellular plastics (32,59,129—131). 

W. T. Ziegler, J. C. Mullins, and A. R. Berquist, Calculation of the Napor Pressure and Heats ofHapori ation and Sublimation ofTiquids and Solids Below One Mtmosphere Pressure, TTII, Xenon, Tech. Rep. No. 3, ContractNo. CST-1154, National Standard Reference Data Program, U.S. National Bureau of Standards, Washington, D.C., 1966. 

To efficiendy drive the development of improved substrate materials, the limiting values of birefringence have to be known this is especially tme for WORM and EOD(MOR) substrate disks. These limit values were laid down by the ANSI (American National Standard Institute) Technical Standard Committee (186—188). For 5.25 in. WORM disks, the ANSI document X 3 B 11/88-144 recommends a maximum LEP value of 9% this corresponds to an optical path difference perpendicular to the plane of the disk of not more than 80 nm/mm (double path). For 5.25 in. EOD(MOR) disks, more stringent conditions apply (ANSI-document X 3 B 11/88-049), which also allow calculation of the allowed range. 

One of the most significant laser safety standards is that developed by the Z-136 committee of the American National Standards Institute (ANSI) (55). Although it is voluntary, many organi2ations use the ANSI standard. It contains a number of items including a recommendation for maximum permissible levels of exposure to laser radiation for various wavelengths, exposure durations, and different parts of the body separation of lasers into four different classes according to the level of ha2ard they present and recommendation of safety practices for lasers in each of the classes. 

Viscosity Glassifications. The general ISO iatemational viscosity classification system for iadustrial oils is given ia Table 4 from ASTM D2422 (American National Standard Z11.232). For high speed machines, ISO viscosity-grade 32 turbiae and hydrauHc oils are a common choice. ISO grades 68 and 100 are appHed for more load capacity ia slower speed machines where power loss and temperature rise are less of a question. 

Physical or artifactual standards are used for comparison, caUbration, etc, eg, the national standards of mass, length, and time maintained by the National Institute of Standards and Technology (NIST) or the standard reference materials (SRMs) collected and distributed by NIST. Choice of the standard is determined by the property it is supposed to define, its ease of measurement, its stabiUty with time, and other factors (see Fine chemicals). 

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