The API 650/API 620 is the American standard for welded flat-bottomed vertical storage tanks. This standard dictates tank design, manufacture, welding, inspection and installation requirements. The API 650 is widely used for tanks designed to withstand low internal pressures, for the storage of typical products such as crude oil, petrol, chemicals and water.We have extensive experience when it comes to API 650 tanks, varying from tanks built in the factory up to +/- 500m3, to tanks built on-location up to +/-15,000 m3.
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.
The oil storage tanks mainly adopt A537CL1, Q345R, 16MnDR, Q370R, S30408, SU30408, A516 grade 70, A516 grade 60 etc. steel grades. Large-scale oil storage tanks are divided into fixed-roof tanks, floating-roof tanks and spherical tanks according to structure.
- The American standard
- Above-ground flat-bottomed tanks
- Wind / Earthquake loads included
- Test & Inspections included
- Up to 15,000m3
- Conical/ Domed / Removable roof
- Double bottom / Cone up/down
- Top corner ring/ Wind girders
In recent years, the main achievements achieved by our company in large-scale storage tanks include: 12 sets of low-temperature tanks of more than 200,000 cubic meters; More than 50 low-temperature storage tanks of 20,000 cubic meters; More than 150 crude oil storage tanks of 50,000-150,000 cubic meters; Various chemical storage tanks below 50,000 cubic meters and supporting installation works, etc. We are committed to providing the best service for all industries, and have been well received by users.