Shop assembly of API Std 650 unanchored liquid-storage tanks

Requirements for prefabrication of bottom plate of large vertical API Std 650 unanchored liquid-storage tanks:
1. The diameter of tank bottom should be enlarged by 0.1% ~ 0.15% according to the design diameter.
2. The minimum dimension of edge plate along the radius direction of tank bottom shall not be less than 700mm.
3. The distance between any adjacent welds of the base plate shall not be less than 300 mm.

Service Conditions and Hydrogen-induced Cracking
When the service conditions might include the presence of hydrogen sulfide or other conditions that may promote hydrogen-induced cracking effects, particularly near the bottom of the API Std 650 unanchored liquid-storage tanks shell at the shell-to-bottom connections, care shall be taken to ensure that the materials and details of construction of the tank are adequate to resist hydrogen- induced cracking. The Purchaser shall consider restricting the sulphur content of the material to be stored through thickness testing of the steel, laboratory surveillance tests, and the use of internal tank coatings to reduce the possibility of hydrogen-induced cracking.

API 650 stipulates that an open tank should be provided with a wind-resistant ring to ensure that the API Std 650 unanchored liquid-storage tanks tank body maintains its roundness when subjected to wind. There are no hard and fast rules for vault API 650 storage tanks. It can be determined by comparing the equivalent wall height with the maximum height of the unreinforced tank wall.

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If you are in the search of best quality of API Std 650 unanchored liquid-storage tanks structural steel plate then you have landed on the right place. These high quality structural steel plates are used for a long time as they have a long life due to their best and advance manufacturing techniques. These API Std 650 unanchored liquid-storage tanks plates are best and ideal for temperature rise work, high pressure and tank fabrication work where accurate & excellent toughness is required for better results. Welcome to our factory. We supply our products to all the leading industries and customers who are satisfied with our production and quality.