BS 6920-1 PDF
Non-metallic materials in contact with drinking water in the UK must conform to British Standard (BS) to address regulations regarding. Find the most up-to-date version of BS at Engineering These Guidance Notes gives details of the BS tests and test sample The requirements for the suitability of non-metallic products are given in BS
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This is a study of gross acute toxicity. Note also that no formulation disclosure is required because the testing is applied in the same way for each non-metallic material regardless of material type or formulation. Extraction of metals A leaching test on all non-metallic materials is conducted. Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their effect on the quality of the water. Standard Number BS Accept and continue Learn more about the cookies we use and how to change your settings.
Materials are exposed to water and then the water is placed in contact with mammalian cells to observe any toxic effects on the cells, in order to assess potential human toxicity.
Search all products by. So, there will be multiples of each of these tests for products 6920–1 include multiple non-metallic materials in contact with the water supply, with each being a separate test on separate materials. The test is conducted with both chlorinated and 69201- water. If the MDOD value is 1. Take the smart route to manage medical device compliance. You may 620-1 issues viewing this site in Internet Explorer 9, 10 or WRAS approves these laboratories based on their participation in comparison tests conducted to ensure that approved laboratories achieve similar test results.
There are no manufacturing-facility audits required for WRAS approvals.
British Standard BS 6920
The faster, easier way to work 6902-1 standards. WRAS approvals for fittings require both mechanical testing, as well as testing of non-metallic tests to BS Learn more about the cookies we use and how to change your settings. If the application is determined to be acceptable, then the WRAS issues the approval.
After exposure to the water and a 1: Please download Chrome or Firefox or view our browser tips.
British Standard BS – WCP Online
If the arithmetic mean of the MDOD values from the three product samples is less than 2. WRAS does not own or operate a testing laboratory. The list of metals and maximum admissible concentration MAC of each is included in Figure 1. Ten samples of each material are required. The samples must also be no more than 12 months old at the date they are received at the test laboratory.
Over a period of seven to nine weeks, the dissolved oxygen levels are measured to determine if any aerobic microorganism growth has resulted in a decrease in the level of dissolved oxygen in the water. A set list of metals is analyzed regardless of material type or formulation.
When shipped to the laboratory, the samples are typically placed into labeled, polyethylene bags, because samples labeled directly with adhesive tape, ink, etc.
Growth of aquatic microorganisms Materials are placed into water that is saturated with dissolved oxygen and sealed into bottles. Find Similar Items This product falls into the following categories. After exposure, any increase in the color or turbidity of the water must be less than five Hazen units and 0.
Your basket is empty. The odor and flavor, color and turbidityextraction of substances of concern to public health and extraction of metals tests are carried out at the specified high temperature. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
If the final MDOD value over weeks 5, 6, 7, 8 and 9 is less than 1. Note that each of these tests is conducted on one material only, not on products consisting of multiple materials.
So non-metallic materials are evaluated for extraction of metals, along with the four other tests listed above, but metallic materials are not evaluated for extraction of metals in the UK.
This directory can be found at https: The MDOD must be less than 1. BS includes five main test requirements, applied to all non-metallic materials in contact with drinking water:. Extraction of substances of concern to public health This test is also known as the cytotoxicity test.
Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water the official title of BS may be long, but it does effectively describe the scope and purpose of the standard. Metallic materials are not evaluated under this test.
Worldwide Standards We can source any standard from anywhere in the world. The PAG meets about 20 times each year to review the recently submitted WRAS approval applications and make a determination regarding acceptance.
The mean dissolved oxygen difference MDOD between water exposed to the product and control is determined based on measurements taken in weeks 5, 6 and 7.