Hydrotesting API 650 & API 653 Storage Tanks
Purpose and Environmental Considerations
Purpose of Hydrotesting
Hydrotesting is a critical step in verifying the structural integrity and leak-tightness of storage tanks designed under API 650 (for new construction) and API 653 (for inspection and repair of existing tanks). The test involves filling the tank with water to simulate operational loads, ensuring it can withstand pressure stresses, foundation settlement, and construction defects before being put into service. Key benefits include:
- Leak Detection: Identifies potential defects in welds or shell plates.
- Structural Integrity Assessment: Confirms that the tank can handle its design loads.
- Foundation Settlement Check: Ensures even distribution of weight and proper support.
- Regulatory Compliance: Meets industry codes and safety standards before commissioning.
Importance of Cooperation with Local Agencies & Stakeholders
Conducting a hydrotest often requires substantial volumes of water, which may be sourced from natural bodies such as rivers or lakes. This necessitates a responsible approach to environmental stewardship, ensuring compliance with regulations that protect fish populations and aquatic ecosystems.
Key Considerations:
- Regulatory Adherence: Local environmental agencies, such as fisheries and water management authorities, may have strict guidelines regarding water withdrawal, discharge, and treatment. Coordination ensures adherence to regulations such as those governing aquatic habitat protection.
- Permit Acquisition: Securing necessary approvals for water sourcing and discharge prevents legal complications and ensures operational transparency.
- Water Treatment & Disposal: The return of water to its source, must meet quality standards to prevent contamination or disruption to local aquatic life.
- Community & Stakeholder Engagement: Early collaboration with indigenous groups, local municipalities, and conservation organizations helps align the hydrotest with environmental and social expectations.
- Emergency Preparedness: In case of accidental spills or environmental impact concerns, a predefined response plan developed in conjunction with local agencies mitigates risks effectively.
Ensuring Hydrotest Success


A well-coordinated hydrotest aligns with technical requirements, environmental safeguards, and operational efficiency. Proactive collaboration with agencies, adherence to regulatory frameworks, and thoughtful stakeholder engagement ensure a smooth testing process while protecting local ecosystems.
NCS Core service Hydro-Testing