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  1. Programs
  2. Aboveground Storage Tank Inspector

Aboveground Storage Tank Inspector

American Petroleum Institute

Certification

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The American Petroleum Institute initiated an API 653 Aboveground Storage Tank Inspector Certification Program with the participation of storage tank owners and users. It establishes a uniform national program that assists state and local governments in aboveground storage tank regulations.

Format

Hybrid

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Program Pathways

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Program Details

Detailed information about this program

This exam is scheduled to be administered in-person at designated test centers only. The American Petroleum Institute initiated an API 653 Aboveground Storage Tank Inspector Certification Program with the participation of storage tank owners and users. It establishes a uniform national program that assists state and local governments in aboveground storage tank regulations. The API 653 Aboveground Storage Tank Inspector must have a broad knowledge base relating to tank inspection and repair of aboveground storage tanks, and will satisfy the minimum qualifications specified in API Standard 653, Tank Inspection, Repair, Alteration, and Reconstruction. API 653 certification is valid for a three-year term and is accredited by the American National Standards Institute (ANSI). This accreditation ensures that the exam has been developed to the highest standard for openness and integrity and meets the rigorous requirements established under the International Organization for Standardization (ISO) 17024. Are you qualified to take the API 653 exam? As outlined in Annex D of the API 653 Standard, the qualification requirements for API 653 applicants are based on the combination of education and experience related to aboveground storage tanks. This experience must have been acquired within the last 10 years while employed by, or under contract with, an authorized inspection agency as defined in API 653. Prior to submitting an application, please use the table below to determine if you qualify to take the API 653 exam. The minimum experience required MUST be documented on your application and will be verified after your application has been submitted.

Requirements

What you need to earn this credential

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Related Programs

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Skills & Competencies

Skills developed through this program

  • Calculate metal loss, corrosion rates, remaining life, remaining corrosion allowance, and inspection intervals for aboveground storage tanks
  • Determine joint efficiency of tank welds using joint types and radiography extent for tank integrity evaluation
  • Calculate maximum allowable fill height and minimum allowable shell thickness for corroded tank areas
  • Evaluate corroded shell areas including average thickness, critical length, and minimum thickness for continued service
  • Evaluate pitted shell areas including maximum acceptable pit depth and pit length limits on aboveground storage tanks
  • Calculate minimum remaining bottom plate thickness and maximum period of operation for tank bottoms
Career Pathways

Occupations this program prepares you for

  • Plumbers, Pipefitters, and Steamfitters47-2152.00
  • Construction and Building Inspectors47-4011.00
  • Environmental Compliance Inspectors13-1041.01
  • Gas Plant Operators51-8092.00
  • Welders, Cutters, Solderers, and Brazers51-4121.00
What You'll Learn

Key competencies developed through this program

Auto-populated·from NSX Competency Framework

Mastery: developing (Level 2)(based on Certification)

  • Pipe system shutoff procedures — execute independently using valve keys and wrenches to isolate sections safely during repair work on multi-unit residential buildings.
  • Copper, PVC, and steel pipe assemblies — join using soldering, brazing, cement, or threaded couplings with consistent quality across routine residential and light commercial installations.
  • Pipe layout positions and passage holes — mark accurately using levels and rulers with minimal oversight on standard new-construction framing packages.
  • Cutting torches, pipe threaders, and pipe benders — operate routinely to fabricate pipe sections to specification on commercial construction projects.
  • Blueprints and building codes — review and apply to plan pipe routing and select appropriate materials for familiar installation scenarios.
  • Underground storm and sanitary piping systems — install and extend to connect fixtures following engineered drawings on residential subdivision projects.
  • Troubleshooting common pipe leaks and blockages — diagnose and repair using systematic inspection techniques during service calls with limited supervision.
  • Full-scale pipe layout drawings — lay out on-site from blueprint dimensions to guide installation of supports and equipment in standard mechanical rooms.
  • Time and task sequencing — manage personal workload across concurrent plumbing tasks to meet project milestones on mid-size commercial job sites.
  • Customer and building occupant communication — explain repair scope and expected disruption clearly and professionally during service and maintenance visits.

Some details on this page are auto-populated from public workforce data sources: O*NET (opens in new tab), BLS (opens in new tab), College Scorecard (opens in new tab), DOL Training Provider Results (opens in new tab), NSX (opens in new tab). Provided in partnership with LER.me Career Intelligence.

Student Outcomes

Performance metrics for this program

Completion Rate
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Placement Rate
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