API 650 Standard Tanks unable adequate safety and reasonable economy for tanks used in the storage of petroleum, petroleum products and other liquid products. It establishes minimum requirements for material, design, fabrication, erection, and testing for vertical, cylindrical, above ground, closed and open top welded storage tanks for internal pressures approximating atmospheric pressure. A higher internal pressure is permitted when additional requirements are met. This Standard applies only to tanks whose entire bottom is uniformly supported and to tanks in non refrigerated service that have a maximum design temperature of 93°C (200°F).
This API 650 Standard Tanks are not based on set tank sizes, nor does it cover storage tanks that are being erected in areas subject to more stringent regulations than what are included in this standard. API 650 Standard Tanks are intended to help purchasers and manufacturers in ordering, fabricating and erecting tanks based on whatever size tank may best meet their needs. It is not intended to prohibit purchasing or fabricating tanks that meet specifications other than those contained in this standard.
API 650 is the standard governing welded tanks for oil storage. It dictates tank design, fabrication, welding, inspection, and erection requirements. API 650 is widely used for tanks that are designed to internal pressures of 2.5 PSI or less and store products such as crude oil, gasoline, chemicals and produced water.
Depending on the desired design and design conditions, these tanks are equipped with a conical roof or a doomed roof, with or without anchors and stiffening rings, such as wind girders and/or a top corner ring. Naturally, these tanks can be provided with a spiral staircase, a cage ladder or a stairway. In terms of material, a form of duplex is often chosen. Due to this material being stronger than normal austenitic stainless steel variants, thin walls can be employed, which ensure for a more rapid, higher quality and affordable tank.
API 650 Standard Tanks – Roof Types
- Open Top
API 650 Standard Tanks – Material Types
- Carbon Steel
- Stainless Steel
- Duplex Steel
We also offer API 12F Tanks