API PUBL 334-1996

$24.05

A Guide to Leak Detection for Aboveground Storage Tanks

Published By	Publication Date	Number of Pages
API	1996	37

Guaranteed Safe Checkout

Category: API

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

Aboveground storage tanks (ASTs) are widely used in the U.S. petroleum industry. These tanks are usually clustered in large terminal facilities, and store a variety of products, both crude and refined. The type of AST addressed in this booklet is a vertically oriented cylinder (“shell”) constructed of welded or riveted steel plates. It may have a fixed roof or one that floats on the product surface and moves up and down as product is added or withdrawn. The bottom of the AST is in contact with the soil or with a backfill material such as sand or gravel that provides a buffer between the tank and the soil underneath it.

This booklet examines many of the known AST leak detection technologies in their generic forms. Its purpose is to demonstrate not only how to select a workable leak detection method but also how to select the technology that is best suited to a particular application. It is also intended as a tool for understanding the uncertainties associated with advanced leak detection technologies.

One other type of AST leak detection methodology is where specific tank bottom and foundation designs are used. As these undertank leak detection designs are covered in detail in API Standard 650, they are not discussed in this document. This method of leak detection dealing with tank bottom and foundation designs can only be installed at the time of tank construction or during a major renovation. However, the leak detection methods described in this report can typically be installed on most tanks during normal operations.

Leak detection as envisioned in this booklet is a tool that has the potential to supplement the regular internal and external inspections that are standard in the industry. Leak detection in ASTs is also regulated by some state and local authorities. All of the leak detection methods discussed in this booklet can provide results on a periodic basis, and some can accommodate continuous monitoring.

AST owners have three important tasks when implementing a leak detection program: (1) to select a type of leak detection technology or technologies, (2) to select specific systems based on those technologies, and (3) to develop a strategy for using those systems. Managers, operators and engineers are urged to explore a range of options before making these decisions.

Additional information