Pressure Equipment Directive 97/23/EC, Annex 1 § 3.1.2
In the context
of approval of welding procedures and personnel,
what is meant by; " the third party must perform examinations and
tests as set out in the appropriate harmonised standards or
equivalent examinations and tests".
As there are
no harmonised standards for the approval of welding
procedures or personnel, it is appropriate to adopt the candidate
product standards, prEN 13445 (pressure vessels), 13480 (piping),
12952 (water tube boilers). 12953 (shell boilers). These
standards refer to qualifying welding procedures using EN 288 and
personnel to EN 287.
Where the directive
refers to equivalent examinations and tests
it is required that suitable and sufficient tests are conducted
to determine the same range of technological properties as those
in the above standards. Where similar tests have already been
conducted that establishes a particular property but the precise
testing conditions vary from those in the above standard, there
is no requirement to repeat the test.
It may be necessary to revise this guidance once the harmonised standards
for welding are published.