API standard 650 ambient temperature tanks roof plates

Generally, the building area temperature of the API standard 650 ambient temperature tanks should be considered before the tank design and construction. The temperature in the API standard 650 ambient temperature tanks building area is closely related to the evaporation loss, energy loss, storage tank materials and the selection of detection instruments, or has a direct impact on the storage cost of the storage liquid. For the same medium, the higher the air temperature and the longer the duration, the higher the material temperature in the API standard 650 ambient temperature tanks, the higher the corresponding pressure and the more volatile loss.

Preheating should be performed by heating and maintaining this heat in appreciable lengths of the joint to be welded, preferably using a strip burner with a mild flame rather than a harsh flame such as that from a cutting torch. Electrical strip heaters are available and have been found to be satisfactory. The preheat of 300°F should be checked with a temperature-sensitive crayon, or similarly accurate means, so that the steel 4 in. (or four times the API standard 650 ambient temperature tanks plate thickness, whichever is greater) on each side of the joint will be maintained at the minimum preheat temperature. Ring burners or heaters are recommended for nozzle and manway welds. At no time during the welding should the base metal fall below a temperature of 300°F.

The API 650 is the American standard for welded flat-bottomed vertical API standard 650 ambient temperature tanks storage tanks. This standard dictates tank design, manufacture, welding, inspection and installation requirements.