BS 1438:1971 Historical

Specification for media for biological percolating filters

standard by BSI Group , 09/07/1971

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Single-sized materials, 63 mm to 14 mm, including coke, clinker, gravel, crushed stone, slag for treatment of water, sewage, trade effluents. Durability; sizes; descriptions of shape, nature of surface and group classification; flakiness, cleanness, sampling and testing; supplier's certificate; independent tests. Notes on use appended. See more

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BS 1438:2004

March 2004
Aggregates. Single-sized aggregates for use as a medium in biological percolating filters
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September 1971
Specification for media for biological percolating filters
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09/07/1971

ISBN(s):

058006784X

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BS 1438:1971 Historical

Specification for media for biological percolating filters

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BS 1438:2004

BS 1438:1971

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BS 1438:1971 Historical