AWS A5.32:2011 pdf download.Welding Consumables - Gases and Gas Mixtures for Fusion Welding and Allied Processes
Safety and health issues and concerns are beyond the scope of this standard and, therefore, are not fully addressed herein. Some safery and health information can be found in annex clause A5. Safety and health information is available from other sources, including, but not limited to: Safety and Health Fact Sheets listed in A8.3, ANSI Z49.1 Safety in Welding, Cutting and Allied Processes', and applicable federal and state regulations.
4.2 Rounding-off procedure
For purposes of determining compliance with the requirements of this Standard, the actual test values obtained shall be subjected to the rounding-off rules ASTM E 29, or Rule A in Clause B.3 of ISO 80000-1:2009 (the results are the same).If the measured values are obtained by equipment calibrated in units other than those of this Standard, the measured values shall be converted to the units of this Standard before rounding off. If an average value is to be compared to the requirements of this Standard, rounding off shall be done only after calculating the average. In the case where the testing standard cited in the normative references of this Standard contains instructions for rounding off that confict with the instructions of this Standard, the rounding off requirements of the testing standard shall apply. The rounded-off results shall fulfill the requirements of the appropriate table for the classification under test.
9. Retesting
If any test fails to meet the requirement, that test shall be repeated twice. The results of both retests shall meet the requirement. Samples for the retest may be taken from the original container or from a new container. Retests need only be for those specific elements that failed to meet their test requirement. If the results of one or both retests fail to meet the requirement, the gas under test shall be considered as not meeting the requirements of this specification for that classification and designation.
In the event that, during preparation or after completion of any test, it is clearly determined that prescribed or proper procedures were not followed in preparing the sample(s) or in conducting the tests, the test shall be considered invalid, without regard to whether the test was actually completed, or whether the test results met, or failed to meet, the require-ment. That test shall be repeated following proper prescribed procedures. In this case, the requirement for doubling the number of test samples does not apply.AWS A5.32 pdf download.