Runkop Club Art ASTM G151 PDF DOWNLOAD

ASTM G151 PDF DOWNLOAD

Jun 21, ASTM G – Designation: G – 09 Standard Practice for Exposing Nonmetallic Materials in Ac. ASTM G UV EXPOSURE (GENERAL). This practice provides general procedures to be used when exposing nonmetallic materials in accelerated test. Buy ASTM G Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources from SAI Global.

Author: Shasho Vull
Country: Vietnam
Language: English (Spanish)
Genre: Music
Published (Last): 25 September 2006
Pages: 452
PDF File Size: 1.69 Mb
ePub File Size: 9.20 Mb
ISBN: 752-3-11140-745-2
Downloads: 89949
Price: Free* [*Free Regsitration Required]
Uploader: Bram

Comparisons between materials are astm g151 made when f151 are tested at the same time in the same exposure device.

Exposure conditions that do not have any temperature cycling or that produce temperature cycling, or thermal shock, or both, that is not representative of use conditions. A common application is conducting a test to establish that the level of quality of different batches does not vary from a control material with known performance. When conducting exposures in devices that use laboratory light sources, it is important to astm g151 how well the accelerated test conditions will atsm property changes and failure modes associated with end-use environments for the materials being tested.

Variability in the 1g51 of degradation in both actual use and laboratory accelerated exposure test can have a significant effect on the calculated acceleration factor.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Differences in sstm spectral distribution between the laboratory light source and astm g151 radiation.

Referenced Documents purchase separately The documents listed below are astm g151 within the subject standard but are not provided as part of the standard.

Reference materials, for example, blue wool test fabric, also may be used for the purpose of timing exposures. It also covers the measurement of the linear thickness if astm g151 coating density is known. Therefore, even if results from a specific exposure test g1551 according astm g151 this practice are found to be useful for comparing the relative durability of astm g151 exposed in a particular exterior environment, it cannot be assumed that they will be useful for determining relative durability of the same materials for a different environment.

Work Item s – proposed revisions of this v151. Exposure conditions that do not have any temperature cycling or that produce temperature cycling, or thermal shock, or both, astm g151 is not representative of use conditions.

For example, detailed information astm g151 exposures in devices that use open flame carbon arc, enclosed carbon arc, xenon arc and fluorescent UV light source are found in Practices G, G, G, and G respectively.

In some cases, a reference material is exposed at the same time as a test material and the exposure is conducted until astm g151 is a defined change in property of the reference material. Note Guide G provides information for addressing variability in exposure testing of astm g151 materials.

ASTM International

A common application is conducting a test to establish that the level of quality of different batches does not vary from a control material with known performance. No laboratory astm g151 test can be specified as a total simulation of actual use conditions wstm outdoor environments.

Astm g151 obtained from these laboratory accelerated exposures can be considered as representative of actual use astm g151 only when the degree of rank correlation has been established for the specific materials being tested and when the type of degradation is the same. Link to Active This link will always route to the current Active version of the standard. Specific information about methods for determining the property of a nonmetallic material before and after exposure are found in standards describing the method used to measure each property.

In some applications, weathering reference materials are used to establish consistency of the operating conditions in an exposure test. Guide G provides information for application of statistics to exposure test results. Asrm conducting exposures in devices that use laboratory light sources, it is important to consider how well the accelerated test astn will reproduce property changes and failure modes associated with end-use astm g151 Even though it is very tempting, calculation of an acceleration factor relating x astm g151 or megajoules of radiant exposure in g115 laboratory accelerated test to y months or astm g151 of exterior exposure is zstm recommended.

These are inappropriate uses of reference materials when they astm g151 not sensitive to exposure stresses that produce failure in the test material or when the reference material is very sensitive to an exposure stress that has very little effect on the test material.

Results can be expressed by comparing the exposure time or radiant exposure necessary to change a characteristic astm g151 to some astm g151 level. Note 4—If astm g151 of an acceleration factor is desired in spite of the warnings given in this practice, such acceleration factors for a particular material are only valid asmt they are based on data from a sufficient number of separate exterior and laboratory accelerated exposures so that results used to relate times to failure in each exposure 1g51 be analyzed using statistical qstm.

Active view current version of standard. Differences in the spectral distribution between the laboratory light source and solar radiation. Even though it is very tempting, calculation of an acceleration factor relating x h or megajoules of radiant exposure in a laboratory accelerated test to y months or years of exterior exposure is not recommended.

ASTM G – UV EXPOSURE (GENERAL)

In some cases, the results for the test astm g151 are compared to those for the astm g151 material. When conducting exposures in devices that use laboratory light sources, it is important to consider how well the accelerated test conditions will reproduce property changes and failure modes associated with end-use environments for the materials being tested.

Note 1-Carbon-arc, xenon arc, and fluorescent UV exposures were also described in Practices, and which referred to very specific equipment designs.

This information is intended primarily for producers of laboratory astm g151 exposure devices. Link to Active This link will always route to the current Active version of the standard. In some cases, a reference material is exposed at the same time as a test material and the exposure is conducted astm g151 there is a defined change in property of the reference material. Variability in the rate of degradation in both actual use and laboratory accelerated exposure test can have a significant effect on the calculated acceleration factor.

Light intensities higher than those experienced in actual use conditions. The test material then astm g151 evaluated. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

These are inappropriate uses of reference materials when they are not astm g151 to exposure stresses that produce failure in the test material or when the reference material is very sensitive to an exposure stress that has very little effect on the test material. Therefore, even if results from atm specific exposure test conducted according to this practice are found to be useful for comparing the relative durability of materials exposed in a particular exterior environment, it cannot be assumed that they will be useful for determining relative durability of the same materials for a different environment.

Practices G, G, and G, and G are performance based standards that replace Practices, and. Note 1—Carbon-arc, xenon arc, and fluorescent UV exposures asym also described in Practices, and which referred to very specific equipment designs.

Acceleration factors astm g151 based on the ratio of irradiance between a laboratory light source and solar radiation, even when identical bandpasses are used, do not take into consideration the effects on a material of irradiance, temperature, moisture, and differences in spectral power distribution between the astm g151 light source and solar radiation. For example, detailed information gg151 exposures in devices that use carbon-arc, xenon-arc, and fluorescent UV light sources are found in Practices G, G, and Astm g151, and G respectively.

Hemispherical on 37 Tilted Surface. Note 6-Practice G describes procedures for selecting and characterizing weathering ast materials used to astm g151 consistency of operating conditions in a laboratory accelerated test. There are a number of factors astm g151 may decrease the degree of correlation astm g151 accelerated tests using laboratory light sources and exterior exposures.

Acceleration factors calculated based on the ratio of irradiance between a laboratory light source and solar radiation, even when identical bandpasses are used, do not take into consideration the effects on a material of irradiance, temperature, moisture, and differences in spectral power distribution between the laboratory light source and solar radiation.