Classification limit

Electrical switches, relays, and other devices are described for safety reasons by several general categories. Since these devices are potential sources of ignition during normal operation (for example, arcing contacts) or due to malfunction, the area classification limits the types of devices which can be used. 

The most commonly used system of staging SCLC was developed originally by the Veterans Administration Lung Cancer Study Group. This system categorizes SCLC into two classifications limited and extensive disease.16... 

A Guidance Document on Acute Inhalation Toxicity Testing is being developed and presently exists as a draft (OECD 2004b). The document recommends the Acute Toxic Class (ATC) Method with a group size of three animals per sex, if the objective of the test is solely related to hazard classification. Limits for particle-size distribution of aerosolized test substances are suggested. The preferred mode of exposure is the nose-only, head-only, or head/nose-only exposure technique, because this mode of exposure minimizes exposure or uptake by noninhalation routes. 

Reasoning for using the classification limit for R48 as the numerical starting point for calculating TTC levels is rather unclear and may not be especially relevant as a starting point. 

Classification limits are effect values - not no-effect values. 

This classification limits the combinatorial explosion encountered in conventional computer-aided synthesis approaches, because composite operators know a priori when they apply. For example, the application of bimolecular operators to a list of chemical species results in the selective application of radical-operator to radicals contained in the list and molecule-operator to species that are molecules. 

Automated, rapid, high-throughput global analysis with minimal sample preparation, used for sample classification Limited ability for metabolite identification and quantification except for NMR... 

Soil types (Russian classification) Limits Mean... 

If possible. Class 3 solvents with low toxic potential should be used. The ICH classification as well as the classification limit of the single solvents in pharmaceutical products is given in Table 3.22. 

If a preparation consists of different substances with hazardous properties, the calculation of the additive properties cannot be done by direct comparison of the concentration Hmits with the general classification limits mentioned in Tables 3-16 to 3-19. 

A preparation has to be classified as very toxic if the sum of the quotients of the concentrations of the very toxic substances divided by their classification limits is equal or greater than one (see Fig. 3.25). 

For ingredients with a classification as very toxic, toxic, harmful, corrosive, sensitizing and carcinogenic (independently of their lethal or non-lethal effect), mutagenic, or toxic to reproduction, aU three categories must only be mentioned above the classification limit, mentioned in paragraph 3.7. 

Table 11.22 Interior Finish Classification Limitations Compiled in NFPA 101 Life Safety Code [72] ...

The NFPA 101 Life Safety Code uses the ASTM E 84 test data for the following classification of building products (Table 53.17 lists the interior finish classification limitations) [55] ... 

The change of AE activities under cyclic loading is studied to qualify the damages. At each loading stage, two of the load ratio and the calm ratio were determined. Results are shown in Fig. 10.11 (Ohtsu, Uchida et al. 2002). Based on the maximum CMOD observed in the beams, classification limits are set as 0.9 for the load ratio and 0.05 for the calm ratio. This is because the serviceability limit of the CMOD is less than 0.1 mm in the standard specification, and the Kaiser effect was not observed in the case of the CMOD over 0.1 - 0.2 mm. 

The measurement of melt mass-flow rate and density is usually the first step in the specification and identification of polyethylene materials. It should be noted that the density of the base polymer differs from the density of the finished geomembrane mixed with carbon black. The confusion, which can occur in the classification of the PE resin, has briefly been dealt with in Sect. 2.1. As a rule, only geomembianes coloured black by carbon black, and not their natural-coloured resin, reach a density which properly meets the classification of HOPE plastic material (see Sect. 2, Tables 2.2 and 2.3). However, one may not consider these classification limits as strict technical criteria even if the density of the black geomembianes is just below 0.940 g/cm, it may correspond to what is ealled HOPE geomembrane over the whole spectrum of its characteristics. 

The most important (primary) properties for PE, PP, and PB pipes, tubings, and fittings are presented within cell classification limits in Tables 1-3, to facilitate identification of such materials. 

TABLE 3 Primary properties of polybutylene cell classification limits ... 

Table 5 gives the physicomechanical properties and cell classification limits for PE gas pressure pipes, tubing, and fittings. 

TABLE 2.3 Cell Classification Limits for PVC Material ASTM D 1784... 

TABLE 2.8 Cell Classification Limits for PE Material ASTM D 3350... 

Four types of storage were used wet room 95% RH 20°C, immersion at 20°C, immersion at 40°C and ambient at 65% RH 20°C. Shrinkage and weight variation measurements were monitored over a 90-day period. Mechanical performance was assessed for 5 time points 2, 7, 28, 60 and 90 days. Compressive strength Rc, estimated according to EN 196-1, is the mean value of tests results varying by less than + 10 % from the mean. The 60 and 90-day time points do not correspond to standard requirements, but are of interest considering the reactivity of super sulfated cement. The results obtained were compared to the classification limits specified by the standard. 

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