National Credential
Credential: API 653 Above Ground Storage Tank Inspector  GI Bill resource
Credentialing Agency: American Petroleum Institute (API)

The American Petroleum Institute (API), API 653 Above Ground Storage Tank Inspector certification is an intermediate-level credential for petrochemical technicians and other professionals. The aim of the API 653 Above Ground Storage Tank Inspector certification is to promote safe storage and material handling of petroleum products in a manner that protects employees, the public, and the environment. The program was developed with the participation of storage tank owners and users; it establishes a uniform national program that supports state and local governments regulations of aboveground storage tanks. Candidates are required to be employed by or under contract to an authorized inspection agency or owner/user agency and have a combination of education and work experience that satisfies the equivalent of 5 years of related experience. API does not have a minimum education requirement if the candidate meets the experience criteria; that criteria includes skill and experience in design, construction, operation, or inspection of aboveground storage tank skills. Additionally, candidates must have 1 year of supervisory or inspection experience that satisfies the guidelines set in the API 653 standard. Candidates with a BS in engineering or technology are expected to have one year of experience along with having the skills of supervision or performance of inspection activities of aboveground storage tanks as described in API 653. Candidates must also pass a written exam.

More information can be found on the certifying agency's website.

Renewal Period: 3 years

API 653 Above Ground Storage Tank Inspector

The following Army Occupations provide training and/or experience that contributes to attaining this credential:

Personnel Category Occupation Occupation Type Related As Promotion Points Skill Level Star Proponent Funded Gap Analysis
Enlisted 15D Aircraft Powertrain Repairer MOS other          
Enlisted 15H Aircraft Pneudraulics Repairer MOS other          
Enlisted 15R AH-64 Attack Helicopter Repairer MOS other          
Enlisted 15T UH-60 Helicopter Repairer MOS other          
Enlisted 15U CH-47 Helicopter Repairer MOS other          
Enlisted 92F Petroleum Supply Specialist MOS most   III      
Enlisted 92L Petroleum Laboratory Specialist MOS other          
Warrant Officer 923A Petroleum Technician WOMOS other        

Army Table Legend


Related As

The military occupations shown in this table are related to this credential in one of four ways: Most, Some, or Other.

Most: This credential is directly related to most of the major duties associated with the military occupation (at least 80%). Note that the credential may require additional education, training or experience before you are eligible for it.

Some: This credential is related to some tasks associated with the duties of the military occupation (related 80% to at least one or more critical tasks but less than 80% of all of the entire military occupation). Note that the credential may require additional education, training or experience before you are eligible for it.

Other: This credential is related to this military occupation, but is more advanced or specialized and therefore will likely require additional education, training, or experience.

Promotion Points Promotion Points icon

This credential has been approved for promotion points for this MOS towards promotion to Sergeant and Staff Sergeant. Clicking the Promotion Points icon will open a link to the promotion points fact sheet.

Skill Level Designation

Skill Level I: This skill level consists of all Soldiers in the ranks of Private (pay grade E-1) up to Specialist (pay grade E-4). Time in Service (TIS) is generally between initial entry and four Years of Service (YOS). This skill level is Entry-level positions requiring performance of tasks under direct supervision.

Institutional training:

  • Structured Self-Development (SSD) level I
  • Basic Leader Course (BLC)

Skill Level II: This skill level is obtained when promoted to Sergeant (paygrade E-5). TIS is generally between 4-8 YOS. Positions requiring performance of more difficult tasks under general supervision; and in some instances, involving supervision of Soldiers in SL1.

Institutional training:

  • Structured Self-Development (SSD) level II
  • Advance Leader Course (ALC)

Skill Level III: This skill level is obtained when promoted to Staff Sergeant (paygrade E-6). TIS is generally between 8-12 YOS. Positions requiring performance of still more difficult tasks and involving first line supervision of Soldiers in SL1 & SL2.

Institutional training:

  • Senior Leader Course (SLC)
  • Structured Self-Development (SSD) level III

Skill level IV: This skill level is obtained when promoted to the rank of Sergeant First Class (paygrade E-7). TIS is generally between 12-18 YOS. Positions requiring relatively detailed knowledge of all tasks specified for a given MOS, normally involving first-line supervision of Soldiers in SLs 1, 2, and 3, and involving managerial duties.

Institutional training:

  • Master Leader Course (MLC)
  • Structured Self-Development (SSD) level IV
  • Senior Enlisted Joint Professional Military Education (SEJPME) I Course

Skill level V: This skill level is obtained when promoted to the rank of Master Sergeant (paygrade E-8). TIS is generally between 18-22 YOS. Positions requiring direct and indirect leadership roles with expertise in company and battalion-level operations and competency across a given CMF, serving as members of a staff at every level in the Army, with a full understanding of the allocation of resources and their utilization in order to accomplish Army functions and missions.

Institutional training:

  • United States Army Sergeants Major Academy (USASMA)
  • Structured Self-Development (SSD) level V

Skill level VI: This skill level is obtained when promoted to the rank of Sergeants Major (paygrade E-9). TIS is generally between 22-30 YOS. Positions requiring organizational leadership roles with multi-dimensional expertise in units and teams on division, corps, and Army staffs, integrated with Joint, Interagency, Intergovernmental, and Multinational (JIIM) partners with a full understanding of the Force Generation process, operations at all echelons, and how the Army runs.

Star Credential Star icon

Star credentials are MOS enhancing, as designated by the Proponent. MOS enhancing credentials are directly related to an MOS or ASI, are taught either partially or completely as part of a Program of Instruction (POI), and improve the MOS technical proficiency.

Proponent Funded Funded icon

This icon indicates credentials which Soldiers may have funded through their MOS proponent. Some proponents offer credentialing opportunities in conjunction with military training and/or as part of MOS development beyond the training base.

Gap Analysis Has Analysis icon

A detailed analysis comparing the credential requirements to the military occupation has been completed. Click on the gap analysis icon to view the analysis page.

API 653 Above Ground Storage Tank Inspector

Eligibility Requirements ()

Note: This credential may have multiple options for becoming eligible. Listed below are the minimum requirements based on the minimum degree required. To view other options, see the Eligibility tab.

  • Credential Prerequisite
  • Experience: 5 years
  • Education
  • Training
  • Membership
  • Other
  • Fee

Exam Requirements ()

  • Written Exam
  • Oral Exam
  • Practical Exam
  • Performance Assessment

Renewal Period: 3 years

  • Continuing Education
  • Exam
  • Continuing Education OR Exam
  • Fee
  • Other

American Petroleum Institute (API)
1220 L Street, NW
Washington, DC  20005-4070
Phone: (202) 682-8000
Contact Page

API 653 Above Ground Storage Tank Inspector

Option 1: Candidate must have:

  • A BS (Bachelor of Science) in engineering or technology;
  • One year of experience performing or supervising piping systems inspection as described in API 653.

Option 2: Candidate must have:

  • A two-year degree or certificate in engineering or technology;
  • Two years of experience designing, constructing, repairing, operating or inspecting piping systems, of which one year must be in supervision or performance of inspection activities as described in API 653.

Option 3: Candidate must have:

  • A High School Diploma or equivalent;
  • Three years of experience designing, constructing, repairing, operating or inspecting piping systems, of which one year must be in supervision or performance of inspection activities as described in API 653.

Option 4: Candidate must have:

  • Five years of experience designing, constructing, repairing, operating or inspecting piping systems, of which one year must be in supervision or performance of inspection activities as described in API 653.

The API 653 Above Ground Storage Tank Inspector credential has the following other requirements:

  • Candidate must be employed by or under contract to an authorized inspection agency or owner/user organization as defined in API 653 and have a broad knowledge base relating to maintenance, inspection, alteration and repair of in-service metallic piping systems.

API 653 Above Ground Storage Tank Inspector

  • Calculations & Tabular Evaluations for Evaluating Thickness Measurements, Weld Sizes, and Tank Integrity
  • Welding On Atmospheric Aboveground Storage Tanks
  • Nondestructive Examination
  • Practical Knowledge – General
  • Practical Knowledge – Specific

There are a number of resources available to help you prepare for the API 653 Above Ground Storage Tank Inspector examination:

An additional resource is Safari Books Online, a searchable digital library that provides online access to thousands of books, training videos and conference sessions. See the Educational Resources page here on COOL to learn how to get free access.

Testing for this credential is handled by Prometric. The test centers are located in the U.S.

To find out more, use the following links on the Prometric website:

For more information on the American Petroleum Institute (API) testing process, visit the agency website.

API 653 Above Ground Storage Tank Inspector

Renewal Period: 3 years

The API 653 Above Ground Storage Tank Inspector credential has the following recertification information:

  • The certification term for API 653 is three years.