API Std 650 ambient temperature tanks decks

During heavy rain, closely observe the change of the water level in the storage area of the API Std 650 ambient temperature tanks. If the water level rises to the dangerous range, drain the water immediately. There are more thunderstorms in heavy rain, and lightning protection devices should be installed in the API Std 650 ambient temperature tanks area to avoid lightning accidents. Observe the groundwater level of the API Std 650 ambient temperature tanks area at any time, clean and dredge the drainage ditch in time to ensure unobstructed drainage, and prevent the bottom of the API Std 650 ambient temperature tanks from leaking and rusting due to untimely drainage.

Standard Hydrostatic and Pneumatic TestsAfter erection is completed and stress relieving, radiographic examinations, or other similar operations, as may be required, are performed, each tank shall satisfactorily pass a series of hydrostatic and pneumatic tests as prescribed in 7.18.2 through 7.18.6. Whenever a solution film is specified in this section to be applied to welding, linseed oil or another equivalent material for disclosing air leakage may be substituted. In freezing weather, linseed oil or a similarly suitable material shall be used.The attachment welding around all openings and their reinforcements in the walls of the API 620 tank shall be examined by the magnetic-particle method both inside and outside the tank API Std 650 ambient temperature tanks. When the underside of a tank bottom rests directly on the tank grade (and is not accessible after erection), such examination of welding on the underside of the bottom and subsequent air testing may be omitted.

Floating roofs shall comply with API standard 650, Appendix C (Attachment 01) or with the API Std 650 ambient temperature tanks requirements as layed (laid )down in the national Chinese specifications SH3046-92 and GBJ128-90.