Aboveground Storage Tank Inspection Services 

API 653 • STI SP001 • PADEP Compliance

Westech Inspection, Inc. provides comprehensive aboveground storage tank (AST) inspection services in accordance with:

• API 653 Tank Inspection, Repair, Alteration, and Reconstruction

• STI SP001 Standard for Inspection of Aboveground Storage Tanks

• Pennsylvania Department of Environmental Protection (PADEP) inspection and compliance requirements

Our certified inspectors support commercial, industrial, petrochemical, and government facilities with complete mechanical integrity evaluations of storage tank systems.

API 653 Tank Inspection

Our API 653 certified inspectors perform comprehensive inspections of welded steel storage tanks to evaluate structural integrity, corrosion rates, and remaining life.

Services include:

• External inspections

• Internal inspections

• Ultrasonic thickness testing of shell, floor, and roof

• Settlement evaluation

• Corrosion rate calculations

• Remaining life assessment

• Repair and alteration recommendations

We ensure inspections are fully aligned with API 653 requirements while minimizing operational disruption.

STI SP001 Inspection Services

We perform inspections in accordance with STI SP001 for shop-fabricated aboveground tanks, including:

• Monthly, annual, and periodic inspections

• Formal external inspections

• Leak prevention and overfill protection verification

• Tank support and foundation evaluation

• Spill control and secondary containment review

Our inspectors properly classify tanks, determine inspection intervals, and ensure compliance with owner-user responsibilities under the standard.

Inspection Techniques & Damage Mechanism Evaluation

Our tank inspection services incorporate advanced examination methods, including:

• Ultrasonic thickness testing (UT)

• Magnetic particle testing (MT)

• Liquid penetrant testing (PT)

• Vacuum box testing of floor seams

• Settlement surveys

• Coating condition evaluation

Beyond inspection execution, we evaluate applicable damage mechanisms such as:

• General and localized corrosion

• Bottom-side corrosion and underside attack

• Settlement-related distortion

• Weld degradation

• Environmental cracking mechanisms

This ensures accurate condition assessment and defensible repair recommendations.

Engineering Support & Reporting

We utilize advanced inspection and engineering software to generate detailed, professional documentation and fitness-for-service evaluations.

Our reporting services include:

• API 653 inspection reports

• STI SP001 inspection documentation

• Repair and alteration specifications

• Re-rate calculations in accordance with API and ASME codes

• Settlement and structural evaluations

• Corrosion rate and remaining life analysis

Reports are typically delivered in less than one week to support efficient maintenance planning and regulatory compliance.

Supporting Your Mechanical Integrity Program

Our storage tank inspection services support:

• Mechanical Integrity (MI) programs

• Risk-Based Inspection (RBI) programs

• Process Safety Management (PSM) compliance

• Environmental compliance programs

• Turnaround and outage planning

We provide actionable, code-compliant information to help facility owners make informed decisions regarding continued service, repair, or replacement.