BS EN 12817:2010 pdf free.LPG Equipment and accessories Inspection and requalification of  LPG tanks up to and including 13 m.
BS EN 12817 Each tank and its ftings shall be included in a writen scheme taking into account the requirements of Clauses 6 to 8.
If duties are shared between different parties, the written scheme shall clearly identify the respective areas of responsibility.
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 fttings;the level of control over the fling and maintenance of the tank.
NOTE The maximum period between requalifcations should not normally be greater than 20 years, and if conditions are not satisfactory the period should be reduced.The witten scheme shall contain the fllwing information:the maximum interval between inspections;the parts to be inspected;the nature of the inspection;the critical parts that, if modified or repaired, shall be inspected by a competent person/body before they can be put back into service;the requirements for pressure relief valves (see 7.5.1);the name of the competent body preparing the written scheme;the date of the preparation of the written scheme. Each tank and its fttings shall be periodically inspected at intervals defined in the witten scheme.
Periodic inspections shall include 6.1.4, 7.5.1, 7.5.3, 7.6, 7.8, 7.9 and 7.10.
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 written scheme shall specify alternative techniques to those specified in Annex A to ensure that no corrosion occurs on the external surface of the tank.
Overground tanks shall be checked for external corrosion or visible damage. If tanks are provided with fixed passive fire protection the techniques described in Annex A are unsuitable. The written scheme shall specify alternative techniques to those specified in Annex A to ensure that no corrosion occurs on the external surface of the tank.
For underground tanks, only the visible part of the tank shall be checked for external corrosion or visible damage.BS EN 12817 pdf download.