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Overview EN 26704:1991 (identical to ISO 6704:1982) provides a simple, functional classification of automatic steam traps based on the mode of actuation of their obturation device. The standard’s sco…
Overview SIST EN 26777:1996 specifies a standardized method for the determination of nitrite concentration in potable, raw, and waste water. Aligned with ISO 6777:1984, this water quality standard se…
Overview EN 26777:1993 (identical with ISO 6777:1984) defines a molecular absorption spectrometric method for the determination of nitrite in potable, raw and waste water. The method is based on form…