This standard specifies the design and calculation for single skin rectangular tanks, fabricated from the following thermoplastics:
Polyethylene (PE)
Polypropylene (PP)
Poly (vinyl chloride) (PVC)
Poly (vinylidene fluoride) (PVDF)
The tanks may be strengthened on the outside by means of ribs or frames made of the same or other materials. This standard is only applicable to tanks which are not intended to withstand internal pressure or vacuum, other than that which may occur during the transfer of fluids (including gases) in their normal operation. The calculation takes into account short-term and long-term active pressures as well as the hydrostatic loading. The following values are longterm pressures and represent the limiting values:
Overpressure: 0,0005 N/mm2 (0,005 bar)
Low pressure: 0,0003 N/mm2 (0,003 bar)
Plate theory was used as the basis of the calculation in this document. Reference to membrane theory is given in Annex B.
Die Norm legt Regeln für die Konstruktion und Berechnung von einwandigen Rechtecktanks fest. Die Tanks können von außen mit Rippen oder Rahmen aus demselben Material oder anderen Werkstoffen, wie glasfaserverstärktem Kunststoff oder Stahl, verstärkt werden. Als Grundlage für die Berechnung wurde in diesem Dokument die Plattentheorie verwendet. Über die Membrantheorie ist in 11.2 nachzulesen.