BS EN 14460:2018 pdf download

BS EN 14460:2018 pdf download.Explosion resistant equipment
Explosion pressure resistant equipment is designed to withstand the explosion pressure without permanent deformation and will not give rise to dangerous effects to the surroundings. Since the design and calculation methods for explosion pressure resistant equipment are similar to those described in EN 13445-1 to -6“Unfired pressure vessels” they are not repeated in this standard. For explosion pressure shock resistant equipment permanent deformation is allowed provided the equipment will not give rise to dangerous effects to the surroundings. This design has been developed especially for explosion protection purposes. This standard focusses on the requirements for explosion pressure shock resistant equipment. This standard is valid for atmospheres having absolute pressures ranging from 800 mbar to 1 100 mbar and temperatures ranging from -20 °C to +60 °C. This standard may also be helpful for the design, construction, testing and marking of equipment intended for use in atmospheres outside the validity range stated above, as far as this subject is not covered by specific standards. This standard applies to equipment and combinations of equipment where deflagrations may occur and is not applicable to equipment and combination of equipment where detonations may occur. In this case, different design criteria for the required explosion resistance are applicable which are not covered by this standard. It is not applicable to equipment which is designed according to type of protection, flameproof enclosures“d” (EN 13463-3 or EN 60079-1). This standard does not apply to offshore situations. This standard is only applicable for equipment where metallic materials provide the explosion resistance. This standard does not cover fire risk associated with the explosions, neither with the materials processed nor with the materials used for construction.
4.3 Design pressure
The design pressure shall not be less than the maximum gauge pressure occurring in the equipment, when subjected to explosion or reduced explosion conditions. If the inside of the equipment is divided into sections (e.g. vessels connected by pipes or containing baffles or surge plates) and an explosion is initiated in one of the sections the pressure in the other sections of the equipment will be increased. As a result, an explosion in these sections will occur at an elevated initial pressure and/or a higher turbulence level. Explosion pressures will thus be higher than the value expected under atmospheric conditions. In the case of such arrangements, appropriate measures shall be taken, either explosion isolation techniques or explosion resistant design derived from representative explosion tests or validated explosion modelling (see informative Annex B]. NOTE 1 Pressures quoted are gauge pressures unless otherwise stated. NOTE 2 If an explosion is initiated at pressures higher than atmospheric pressure, the maximum explosion pressure will rise proportionally to the initial pressure. NOTE 3 For guidance on the derivation of design pressure for single vessels see Annex A, for interconnected vessels and pipes see Annex B. For explosion venting, the design pressure is derived from EN 14491 and EN 14994 for dust and gas explosions respectively. For explosion suppression, the design pressure is given by the manufacturer of the explosion suppression system according to EN 14373.