ISO 291:2008 pdf free

03-05 comment

ISO 291:2008 pdf free.Plastics — Standard atmospheres for conditioning and testing.
ISO 291:2008 sets out specifications relating to the conditioning and testing of all plastics and all types of test specimen at constant atmospheric conditions. Special atmospheres applicable to a particular test or material or simulating a particular climatic environment are not included in this International Standard.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
standard atmosphere
preferred constant atmosphere for which specific air temperature and humidity values, as well as limit ranges for atmospheric pressure and air-circulation velocity, are specified, the air not having any significant additional constituents and the atmosphere not being subject to any significant additional radiation influences.
NOTE 1 Standard atmospheres permit a defined state to be attained and maintained for samples or specimens.
NOTE 2 Standard atmospheres correspond to the average atmospheric conditions in laboratories and can be established in conditioning (controlled atmosphere) cabinets, chambers or rooms.
conditioning atmosphere
constant atmosphere in which a sample or test specimen is kept before being subjected to a test
test atmosphere
constant atmosphere to which a sample or test specimen is exposed throughout a test
4 Principle
If a test specimen is exposed to a specific conditioning atmosphere or temperature, then a reproducible state of temperature and/or of moisture equilibrium is reached between the test specimen and the conditioning atmosphere or temperature.
It is not the intent of this International Standard to define procedures specifying how to determine sensitivity to moisture.
Some materials may have special conditioning requirements. Follow the relevant International Standards.
5 Standard atmosphere
Unless otherwise specified, use one of the sets of conditions given in Table 1 as the standard atmosphere.
6 Classes of standard atmosphere
Table 2 gives the different classes of standard atmosphere corresponding to different tolerance levels for the temperature and relative humidity. The tolerances given in Table 2 apply to the specimen-storage space in a test enclosure or conditioning enclosure. Class 1 cabinets will require more frequent calibration. Follow the manufacturer’s recommendations for calibration. Cabinets shall be calibrated at least once per year.ISO 291:2008 pdf free download.

Download It Now Download Here
BS EN 197-5:2021 pdf download BS pdf free download

BS EN 197-5:2021 pdf download

BS EN 197-5:2021 pdf download.Cement Part 5: Portland-composite cement CEM II/C-M and Composite cement CEM VI. 6 Standard designation Cements covered by this document shall be designated by at least the notation of the cement type as specified in Table 1 and the Figures 32,5, 42,5 or 52,5 indicating the strength class. In order to indicate the early strength class...
BS ISO 50009:2021 pdf download BS pdf free download

BS ISO 50009:2021 pdf download

BS ISO 50009:2021 pdf download.Energy management systems — Guidance for implementing a common energy management system in multiple organizations. 4 Context of the energy management group 4.1 Understanding the energy management group and its context Members of the EnMG (referred to in this document as the “constituent organizations”) have agreed to manage their energy use collaboratively to improve energy performance...
BS ISO 6727:2021 pdf download BS pdf free download

BS ISO 6727:2021 pdf download

BS ISO 6727:2021 pdf download.Road vehicles — Motorcycles and mopeds — Symbols for controls, indicators and tell-tales. 4.10 Letters and numerals may be used as symbols, but are not registered by ISO/TC 145, Graphical symbols, or published in ISO 7000. For example, the letters R, N, D, listed as symbols <MG.01 to MG.03>, have the meaning indicated when used in...


Anonymous netizen Fill in information