Product ranges in Steel Pipe, Casing and Tubing, Steel Plate, Sucker Rod, Steel Pipe Fittings, Valves, and Equipment for pipelines.

The most popular tanks available on the market today are the 620 and 650 models, but which is right for you The answer depends on what you require out of the product.

API 620 regulates the design and manufacture of large steel low-pressure storage tanks, usually larger than 300 feet in diameter.

By contrast, API Standard 650 is typically used for carbon, stainless steel and aluminium tanks located in terminals, refineries, pipelines and other process facilities.

Both have different pressure and temperature parameters as well.

For the complete API Standard 650, 10th Edition, March 2007, click here.

The tank has a single, vertical, centered axis of revolution with a minimum material thickness of 316 inch.

If additional requirements are met, higher internal pressures are allowed.

API 650 only covers tanks that support the whole bottom evenly and tanks in non-refrigerated service that have a maximum design temperature of 200 degrees F.

It requires that you have a minimum material thickness of 316 inch.

To quickly summarize, API 620 can store contents at a lower temperature and higher pressure whereas API 650 permits a lower amount of pressure at a higher temperature.

Given that, and knowing your specific pressure and temperature requirements, you can see that choosing your standard carefully is critical.

If you need help, contact the experts at Swanton Welding today.

Api 650 Tank Specification