Procedure: ASTM G utilizes a nutrient salts agar that provides all of the trace nutritional elements needed by fungi to support growth. However, to achieve a. Buy ASTM G PRACTICE FOR DETERMINING RESISTANCE OF SYNTHETIC POLYMERIC MATERIALS TO FUNGI from SAI Global. ASTM G Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi. This practice covers determination of the effect of.
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To assess materials other than plastics, use of this test method should be agreed upon by all parties involved. You may awtm a document from your Alert Profile at any time.
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.
Subscription pricing is determined by: Please first verify your email before subscribing to alerts. Types of Fungal Attacks Fungus can disrupt systems and cause damage in several ways, including: Test methods are used to determine the effect of fungi on the properties of synthetic polymeric materials in the form of molded and fabricated articles, tubes, rods, sheets, and film materials.
Proceed to Checkout Continue Shopping. Many products that operate in warm, humid environments must be tested to withstand fungal attacks, since this problem can cause myriad of operational challenges. 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.
Contamination can have a negative effect on the test results since it could easily provide nutrients to the fungus for growth. A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition. Your Alert Profile lists the documents that will be monitored. Link to Active This link will always route to the current Active version of the standard. Add to Alert PDF. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
ASTM G21 – National Technical Systems
There could be fungal spores on the samples that are not readily visible to the eye due to the size of the spores, localized areas of growth, or because the color of the spores are similar to those of the test specimen. If the document is revised or amended, you will be notified by email. Changes in optical, mechanical, and electrical properties may be determined by the applicable ASTM methods. This service is not available if you are a URL user where you do not log in with an email address.
The inch-pound units given in parentheses are for information only. To ensure that estimates of behavior are not too optimistic, the greatest observed degree of deterioration should be reported. Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work. As the voice of the U. This standard is also available to be included in Standards Subscriptions. Need more than one copy?
The test can reveal if the specimen being analyzed supplies sufficient nutrition for fungal growth. This standard is not included in any packages.
If the samples are mishandled or suspected of contamination prior to testing, they should be cleaned, Testing cannot be conducted on specimens until 72 hours have passed. Changes in optical, mechanical, and electrical properties may be determined by the applicable ASTM methods.
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Already Subscribed to this document. To varying degrees, live fungi will use wood, paper, leather, hydrocarbons, PVC, polyurethanes, certain plastics and paints, along with other materials, as fuel for growth. Standards Subsctiption may be the perfect solution.
NTS engineers are extremely careful handling samples for fungus testing, as the cleanliness of the specimens is important y21-09 to testing — especially testing being conducted on a cleaning or decontamination process.
The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email. It is generally the other components, such as plasticizers, cellulosics, lubricants, stabilizers, and colorants, that are responsible for fungus attack on plastic materials.