BS EN 12817:2010 pdf download
BS EN 12817:2010 pdf download.LPG Equipment and accessories – Inspection and requalification of LPG tanks up to and including 13 m3.
5 Written scheme
5.1 Each tank and its fittings shall be included in a written scheme taking into account the requirements of Clauses 6 to 8.
5.2 If duties are shared between ditferent parties. the written scheme shall clearly identity the respective areas of responslity.
5.3 Intervals between inspections shall be determined by consideration of the following:
the design specification of the tank and its equipment:
the corrosion protection system on the tank:
the system used to ensure that the LPG quality conforms to its specifications/standards, and that It does not contain components damaging to the material of the tank or its fittings:
the level of control over the filling and maintenance of the tank.
NOTE The maximi.an period between requatIcahons shoukt not normally be greater than 20 years. and if conditions are not satisfactory the period should be rejced.
5.4 The written scheme shall Contain the following information:
the maximum interval between inspections; the parts to be inspected;
the nature of the inspection:
the csitical parts that, ii niodif led or repaited, shall be inspected by a competent personbody before they can be put back into service:
the requirements for pressure relief valves (see 7.5.1);
the name of the competent bcxty preparing the written scheme:
the date of the preparation of the written scheme.
6 Tank Inspection and requalificatlon
6.1 Routine inspection
6.1.1 Each tank and its fittings shall be routinely inspected at intervals defined in the written scheme.
6.1.2 An inspection or exception report shall be produced If repairs are required.
6.1.3 Routine inspections shall include visual inspections at the time of filling the tank.
6.1.4 RoutIne Inspections slial include 7.1, 7.2, 7.3, 7.4, 7.52,7.5.4.7.7 and 7.11.
6.2 Periodic inspection
6.2.1 Each tank and its fillings shall be periodically inspected at intervals defined in the written scheme.
6.2.2 Periodic inspections shall indude 6.1.4,7.5.1.7.5.3.7.6,7.8,7.9 and 7.10.
6.2.3 For overground LPG tanks, a visual inspection of external surfaces shall be carried out (see Annex A). If tanks are provided with fixed passive fire protection, techniques described In Annex A are unsuitable. The wnnen scheme shall specify alternative techniques to those specified in Annex A to ensure that no corrosion occurs on the external surface of the tank.
6.3 Requallficatlon
6.3.1 Requaliticatlon for overground LPG tanks
Requal.fication intervals shall be specified in the wntlen scheme. Requalification shall include 7.5.1 and conform to either:
a) individual requalitication of each tank, including an external visual inspection and at least one of the following:
1) an internal visual inspection (see Annex A);
2) a hydraulic pressure test (see Annex B);
3) an acoustic emission test (see Annex C):
4) thickness checks (see Annex 0);
5) other method equivalent to any of the above;
b) requalification of a prodijction batch by sampling, for serially produced tanks isee Annex E).
Sample tanks shoukl be subjected to an external visual inspection (see Annex A). and to the following tests before any repair or refurbishment is carried out:
C) an internal visual inspection (see Annex A): and
d) a hydraulic pressure test (see Annex B); and
e) an ultrasonic thickness test (see Annex D); and
f) an X-ray or ultrasonic check on welds, comparable to inspections carried out at the time of manufacture;
or
g) an acoustic emission test (see Annex C).
6.3.2 Requaliticatlon for underground LPG tanks
6.32.1 Re-qualification intervals shall be specified in the written scheme. Re-qualification shall include
7.5.1 and conform to either 6.3.2.2 or 6.3.2.3.
6.3.2.2 Individual requalificalion of each tank shall include at least one test from group 1 and one from group 2o4 Table I.
6.3.2.3
Requlification of a production batch of tanks by sampling shall be according to a sampling
method agreed by a competent body (an example of a sampling method is given in Annex E).
Tanks from the sample which are returned from customers, shall be submitted to the ollowing tests before
any repair or refurbishment:
an extemal visual inspection (see Annex A).
Plus one or more of the fllowing tests as required by the written scheme:
an intemal visual inspection (see Annex A):
a hydraulic pressure test (see Annex B);
an ltrasonic thickness test (see Annex D);
an X-ray or ultrasonic check on welds, comparable to inspections carried out at the time of manufacture.
The other tanks from the sample, selected at random in the production batch, shall be submitted to an acoustic emission test on site (see Annex C).
