Methods of test for phosphoric acid (orthophosphoric acid) for industrial use - Methods of test for phosphoric acid (orthophosphoric acid) for industrial use. Determination of sulphate content

It is not applicable to onsite joining processes

BS ISO 20252:2012 this revision includes:

Performance standards define standard electro-optical performance under a set of prescribed conditions and contain a series or a set of tests and measurements (which may or may not be grouped into a specific schedule) with clearly defined conditions

Test procedures used to support the test methods in BS EN 12697-30 to BS EN 12697-33

ITS-90 (symbol t90)

a)      New and updated material from recently revised international standards:

ISO 3834-5 on fusion welding of metallic materials is applicable to:

the guidelines of BS 8000-8 enable you to construct and install plasterboard partitions and dry linings efficiently in your construction projects

voltage and current tolerances

Subtle changes such as “water content” instead of “moisture content” have been made to comply with UKAS

Contents of BS EN 61977:

Note2: ISO 21248 is not intended to exclude the use of performance indicators or of methods for impact assessment not specified in it