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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The list of metals and maximum admissible concentration MAC of each is included in Figure 1.
Find Similar Items This product falls into the following categories. 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 bz standard.
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.
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British Standard BS 6920
A sample may consist of more than one piece. Over a period of seven to nine 69201- 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. 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.
Non-metallic materials in contact with drinking water in the UK must conform to British Standard BS to sb regulations regarding prevention of contamination of the drinking water supply. If the application is determined to be acceptable, then the WRAS issues the approval. Metallic materials are not evaluated under this test.
Note also that no formulation disclosure is required because the 6920-11 is applied in the same way for each non-metallic material regardless of material type or formulation. If the arithmetic mean of the MDOD values from the three 69200-1 samples is less than 2. Approvals are valid for five years. When shipped to the laboratory, the samples are typically placed into labeled, polyethylene bags, because samples labeled directly with adhesive tape, ink, etc.
If the final MDOD value over weeks 5, 6, 7, 8 and 9 is less than 1. This directory can be found at https: Customers who bought this product also bought BS 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.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. The samples must also be no more than 12 months old at the date they are received at the test laboratory.
After exposure to the water and a 1: 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. You may experience issues viewing this site in Internet Explorer 9, 10 or Ten samples of each material are required. BS includes five main test requirements, applied to all non-metallic materials 690-1 contact with drinking water:.
Note that each of these tests is conducted on one material only, not on products consisting of multiple materials.
If after seven weeks the MDOD value is between 1. Search all products by. 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. A taste test panel is bx for the evaluation. There are no manufacturing-facility audits required for WRAS approvals.
Odor and flavor This test is performed on individual materials to determine if the materials impart 69201- discernible odor or flavor to the water.
British Standard BS – WCP Online
Click to learn more. After exposure, any increase in the color or turbidity of the water must be less than five Hazen units and 0.
Interestingly, there is no safety standard or testing applicable to metallic materials in contact with drinking water in the UK. Learn more about the cookies we use and how to change your settings. Extraction of metals A leaching test on all non-metallic materials is conducted. Growth of aquatic microorganisms Materials are placed into water that is saturated with dissolved oxygen and sealed into bottles. WRAS approves these laboratories based on their participation in comparison tests conducted to ensure that approved laboratories achieve similar test results.
The test is conducted with both chlorinated and non-chorinated water.
A set list of metals is analyzed regardless of material type or formulation. If the MDOD value is 1. The PAG meets about 20 times each year to review the recently submitted WRAS approval applications and make a determination regarding acceptance. Worldwide Standards We can source any standard from anywhere in the world.