Among the many topics covered by the Steel Tank Institute's SP001 inspection program is API 653, inspection time periods, and small field erected tanks. It also discusses inspection methods and techniques.


STI SP001 is a standard for the inspection and integrity management of aboveground storage tanks. It provides evaluation criteria and inspection procedures for carbon steel, welded steel, and fiberglass aboveground storage tanks. It is applicable to ASTs storing combustible liquids and stable liquids at atmospheric pressure.

The SP-001 Steel Tank Institute inspection program has been updated to include new features, including a checklist for inspections, guidelines for the repair of double-wall tanks, and inspection guidelines for steel diked tanks. The 5th edition of the standard also includes an updated section on heated thermoplastic liquids storage up to 500oF.

The SP-001 standard is a supplement to the API 653 Storage Tanks standard. While the API 653 standard is more specific, the SP-001 is a less strict inspection standard. This is because the STI SP-001 does not require entry into the tank. However, if the tank is under 30,000 gallons, the owner should perform leak tests.

The SP-001 Standard for Inspection of Aboveground Storage Tanks was developed by the Steel Tank Institute and the Society of Petroleum Field Appraisers. The first edition was published in 2000. The committee involved in the development of the Standard included representatives from major oil companies and regulating agencies. The Standard covers both portable and fixed tanks.

The SP-001 Standard’s 5th Edition was developed to help facility owners/operators comply with EPA mandates. Among the changes are the removal of the maximum specific gravity of stored liquids, new welding sections, and safety considerations.

In addition to leak tests, the SP-001 Standard for Inspection of Aboveground Tanks, 5th Edition also includes an evaluation matrix for periodic AST inspections. Each month, a certified STI inspector must perform internal and external formal inspections. The internal inspections involve cleaning the tank and inspecting the inside. The external formal inspections must be conducted by a certified STI inspector or an authorized API 653 inspector.

The SP-001 Standard for Inspection Aboveground Storage Tanks, 5th Edition has been updated to reflect recent changes in the industry. It now also covers the inspection of concrete-encased shop-fabricated tanks. It is also designed to assist owners/operators in determining the suitability for continued service of tanks containing combustible liquids.

API 653

STI SP001 Inspection Standard is an alternative to API 653 and covers inspections of above ground storage tanks. It addresses inspection of portable containers, field erected above ground storage tanks, and associated secondary containment.

The standard requires a monthly in-service inspection by a qualified inspector. This inspection involves a comprehensive inspection of the tank, including checking for external indicators of problems. The certified inspector also performs internal and external formal inspections. The inspection report should include a detailed scope of inspection, unacceptable conditions, and recommended corrective actions. The inspector's findings are to be documented, recorded, and maintained in facility records. The results of all tests are to be kept for five years.

The standard also outlines evaluation criteria for conducting tank integrity testing. The standard does not use the risk-based approach of API 653. However, it is still a good source of integrity-related information for small tanks.

The STI SP001 standard is most often used for shop fabricated carbon steel above ground storage tanks. It is not applicable to fiberglass or plastic above ground storage tanks.

The standard is intended to satisfy statutory requirements in the USA. However, it is not recognized by most foreign countries. It is not governed by API 653 codes, and does not go into as much detail as the API 653 Body of Knowledge.

The STI SP001 standard covers inspection of tanks and containers for storage, storage of liquids, storage of gases, and intermediate bulk containers. It also includes inspections of welded metal. The standard focuses on welded steel tanks, carbon steel, stainless steel, and smaller portable containers.

STI SP001 is a standard that is not governed by API 653 codes, but it is a very good source of integrity-related information for small ASTs. It does not require a large investment in certification, and it provides a less stringent inspection procedure.

The standard was developed by the Steel Plate Fabricators Association/Steel Tank Institute. It was first published in 2000. In 2011, the API published a revised version of the standard. It is currently in the fifth edition.

In order to be certified as an STI SP001 tank system inspector, you need to complete a 5-day training course, provide a copy of your employment references, and pass an eye test. In addition, you will need to obtain department approval.

Small field-erected tanks

STI SP001 is a standard for the inspection of above ground storage tanks, and it covers both shop-built and field-erected above ground tanks. It is a risk-based inspection standard. It covers leak detection methods, safety considerations, and recordkeeping. It also provides guidelines for tank integrity testing, repair, alteration, relocation, and reconstruction.

Unlike API 653 which is a more general inspection standard, STI SP001 specifically applies to aboveground storage tanks. Using this standard will help to identify problems in your tank system before they become serious, so you can take steps to prevent them.

It is important to keep in mind that the number of inspections required depends on the size, type, and configuration of your tank. The length of the inspection interval can vary from two years to 20 years. Generally, internal and external formal inspections must be carried out by a certified inspector.

The American Petroleum Institute (API) developed the API 653 standard to address the inspection of field-erected above ground storage tanks. This includes the floor, shell, piping, and manways of ASTs. Various types of leak detection features are included in the SP001 standard, which ranks tanks by their condition based on whether they have these features or not.

The Steel Tank Institute (STI) is a smaller US organisation that focuses on the inspection of small field-erected above ground storage tanks. They provide information to industry professionals and the public. They also research and develop new technologies and techniques to improve their services. They are members of the Steel Plate Fabricators Association (SPFA).

The Steel Tank Institute publishes the STI SP001 standard to comply with statutory requirements in the USA. It also offers links to download checklists for the SP001 inspection. The STI SP001 Inspection Standard allows for less rigorous inspections for storage tanks up to 30 feet in diameter. This makes it more flexible and less burdensome to carry out inspections.

The SP001 Standard is a component of the EPA Spill Prevention Control and Countermeasure Program. In addition to reducing the risk of a spill, the inspection can identify problems in the tank system before they cause damage.

Inspection time period

STI SP001 is an inspection standard that provides an alternative to API 653. It is the inspection standard for shop-built metallic aboveground storage tanks up to 30 feet in diameter and up to 30,000 gallons in capacity. It is a risk-based standard that is used to categorize and schedule inspections.

The Steel Tank Institute (STI) developed the standard in order to minimize the likelihood of an explosion from a ruptured AST. The standard has three categories: portable containers, non-portable containers, and field-erected tanks. Each category has different requirements, which can vary from one facility to the next.

For shop built tanks with capacity of less than 5,000 gallons, monthly visual inspections are not required. However, a STI-SP001 inspector can perform a comprehensive evaluation of the tank system. They can find problems with weeping pipe systems, valves, and venting systems.

The STI-SP001 inspection can also identify problems with the secondary containment of the tank. They can even find evidence of malfunctioning valves and improper tank supports.

The Steel Tank Institute has created a number of checklists and suggested annual inspection forms to assist with this process. The STI-SP001 standard also encourages regular inspections by a certified inspector.

Having a quality inspection program helps to ensure that your facility meets regulatory requirements and produces the best product. It also helps to manage risk and reduce costs. In addition to meeting minimum requirements, a good inspection program is an investment that will benefit your facility in the future.

Developing a fine-tuned inspection program requires more than a spreadsheet. It takes an experienced inspector who understands tank safety, fire prevention, and environmental issues.

STI-SP001 inspections help to identify potential tank system problems before they cause harm. They can find leaks, damaged shells, and weeping pipe systems. This preventative measure is the most effective way to reduce risks.

A quality inspection program also helps to predict future costs. A knowledgeable STI-SP001 inspector will review prior tank inspection reports and analyze the tank's specifications. He or she will also assess the risk factors that affect the tank's life. If the inspector finds significant risk, the tank owner can then choose to invest in repair or replacement of the tank.