API standard 650 liquid storage tanks gauging platform

Manufacturer’s Report and CertificateUpon completion of all tests and inspections on each tank API standard 650 liquid storage tanks, the Manufacturer shall prepare a report summarizing all the data on the tank, including foundations (if they are within the Manufacturer’s scope of responsibility) and shall attach to the report all drawings and charts as required by other paragraphs in this section of the rules (see API 620 tank 7.13 and Appendix M).The tank Manufacturer shall furnish and fill out a certificate for each tank (such as that shown in Appendix M), attesting that the tank has been constructed according to the rules in this standard. This certificate shall be signed by the Manufacturer and the Purchaser’s inspector. This certificate, together with the nameplate or markings placed on the tank, shall guarantee that the Manufacturer has complied with all applicable requirements of these rules.

Before the start of erection, inspect each API 650 tank foundation to ensure that it is level and acceptable to receive Work. Remove temporary erection attachments welded to the interior or exterior of the API standard 650 liquid storage tanks shell or to the bottom by arc gouging, and grind weld area smooth.

When the day light gradually decreases, the temperature of oil in the API standard 650 liquid storage tanks will also decrease, the evaporation speed will gradually slow down, and the pressure in the API standard 650 liquid storage tanks will also decrease. When the pressure in the API standard 650 liquid storage tanks is lower than the negative pressure rating of the breathing valve, the outside air is sucked into the API standard 650 liquid storage tanks through the open vacuum valve, which is the "suction" process of the oil tank.