Leak Testing Methods Amendment 0003.docx
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- Solicitation number
- FA460024Q0054
About this file
This document is a government file titled "Leak Testing Methods Amendment 0003" that outlines the requirements for leak testing of above-ground storage tanks (ASTs) and portable containers.
The key details are:
- For shop-fabricated ASTs, inert gas (not air) must be used for pressure testing, and vacuum testing of the interstice is an option. Leak testing of UL2085 certified ASTs must be done per the manufacturer's requirements by a trained professional.
- Portable container leak testing must be done in accordance with DOT regulations in 49 CFR 173.28, 178.803, and 180.605, or equivalent.
- Leak testing is a point-in-time method to determine if an AST is liquid-tight, and is not a preventative measure, but can be used as a supplemental tank integrity check.
The related federal contract opportunity is for certified STI SP001 inspections of 50 ASTs at Offutt AFB, per the Performance Work Statement. Questions are due by 16 August 2024 and offers are due by 23 August 2024. The contract is being solicited by the Department of the Air Force Air Combat Command.
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Text version
Leak Testing Methods (LTM)
1.1 Shop Fabricated AST leak testing procedure
1.1.1 Consult the Steel Tank institute Recommended Practice R912, Installation Instructions for Shop Fabricated Stationary Aboveground Storage Tanks for Flammable, Combustible Liquids. Air shall not be used for a pressure test; an inert gas shall be used instead. The introduction of a gas containing oxygen (such as air) to a tank that has previously held petroleum liquid can pose an explosion hazard.
1.1.2 Vacuum testing of the interstice of double-wall or double-bottom tanks is an option. Refer to the Steel Tank Institute Recommended Practice R912, Installation Instructions for Shop Fabricated Stationary Aboveground Storage Tanks for Flammable, Combustible Liquids.
1.1.3 Leak testing of CE-ASTs that are listed and labeled as UL2085 shall be performed in accordance with the specific requirements (or the testing manual) of the manufacturer. The testing, which includes brand-specific vacuum and hydrostatic testing, shall be performed by a properly trained professional.
1.2 Portable containers leak testing procedure – Refer to DOT Sections 49 CFR 173.28 (Reuse, reconditioning and remanufacturing of packagings – mainly for drums) and Part 178 – 49 CFR Subpart O – Testing of IBC’s [Intermediate Bulk Container] (section 178.803 Testing and certification of IBC’s) and 49 CFR 180.605, (Requirements for periodic testing, inspection and repair of portable tank), or equivalent, for portable container testing and recertification. Electronic versions of these documents are available online.
1.2.1 See the definition of Leak Testing Methods (LTM) for more information:
· A point-in-time test method to determine if an AST is liquid-tight. Leak testing is not preventative; it provides an indication only of whether the AST’s integrity has already been breached. Therefore, it may only be used as a tank integrity measure or as a supplement to other inspection procedures. LTMs may include the following technologies:
· Gas pressure decay (includes vacuum decay)
· Gas pressure soap bubble testing
· Gas tracers (e.g., helium tracer)
· Soil tracers (chemical Marker)
· Mass measurement
· Level Measurement
· Hydrostatic test
File details come from the government source that posted it. Updated .