API 650 / 653 – Tank Critical Zone

API 650 Storage Tank – Critical Zone in the Bottom;  API 653 Storage Tank Inspection, Repair, Alteration, and Reconstruction Code requires the tank bottom to be within 3 inches from the tank shell to be a critical zone because the area must support the weight of the tank shell that is placed near the welding line. Shell-to-Bottom makes Tank-Bottom in this area highly stressed. Critical Zone will have special requirements for inspections, repairs or reconstruction. Continue reading API 650 / 653 – Tank Critical Zone

API 650 – Storage tank Nameplate requirements

API 650 Storage Tank – Nameplates;  The Nameplate of the API 650 Aboveground Atmospheric Storage Tank as per Standard (para.10.1) specifies that the letters and numbers on the Nameplate must be at least 4 mm tall and the Nameplate must be welded or welded to the Tank Shell at the position near the Manhole or attached to the Reinforcing Plate of the Manhole. On the Nameplate, the Storage Tank must be specified as in the picture.   Continue reading API 650 – Storage tank Nameplate requirements

Allowable Stress in ASME VIII, B31.3, API 650, API 653

Basis of Allowable (Design) Stress in ASME VIII Pressure Vessel and ASME I Boiler;  (The Allowable Stress from SMTS and Allowable Stress) as well as the ASME B31.3 Proces Piping, for ASME VIII Pressure Vessel and ASME I Boiler values Allowable Tensile Stress of Material , the Code permits used to calculate the thickness and composition. The variables that are used to handle the pressure of the Pressure Vessel and Boiler will be specified in the ASME BPVC Section II Part D, which is generally equal to A value that is less than 1/3.5 Tensile Strength and 2/3 Yield Strength … Continue reading Allowable Stress in ASME VIII, B31.3, API 650, API 653