... Pressure2.5Mpacorrosion allowance1.0mmNominal DiameterDN80tank volume20cbmopening pressure1.68-1.76 Mpaheat treatmentoverallBack seat pressure≥Opening pressure 0 ... functional characteristics of liquefied petroleum gas storage tank:1, pressure components of the product materials, dimensions ... . 4, A, B Class 100% ray weld inspection, II level qualified, C, D Class welds 100% magnetic particle inspection ...