Witherup provides tank repair/modification services to help customers repurpose or extend the life of existing tanks. Repair/modification services are performed in accordance with API 653 and often includes new tank bottoms, shell repairs, and roof repair/replacements including internal floating roofs and floating roof seals. Witherup has extensive experience in lifting, supporting, moving, and lowering tanks from 20ft. diameter to 120ft diameter.
Witherup also provides turnkey design-build services for those modifications that require engineering, such as adding roofs to existing open top tanks or increasing shell height. All modifications, design, and testing are in accordance with API 650, API 620, API 653 and DEP requirements.