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API RP 2350 Document Information:
Title
Overfill Protection for Storage Tanks in Petroleum Facilities
American Petroleum Institute
Publication Date:
Jan 1, 2005
Scope:
Applicability
The scope of this recommended practice (RP) is specifically limited to
tanks associated with
marketing, refining, pipeline and similar facilities containing Class
I or Class II petroleum
liquids. This RP does not apply to:
• Underground storage tanks
• Aboveground tanks of 1320 U.S. gallons (5000 liters) or less
• Tanks that are integral to a process
• Tanks containing Class III liquids
• Tanks containing non-combustible liquids
• Service stations
• Loading or delivery from wheeled vehicles (such as tank trucks
or railroad tank cars)
Relationship of This Recommended Practice to NFPA 30
This document was prepared to include consistency with NFPA 30-2003
Edition, Chapter 4.6, which
includes the following requirements:
Aboveground tanks at terminals receiving transfer of Class I liquids
from mainline pipelines or
marine vessels shall follow formal written procedures to prevent
overfilling of tanks utilizing one
of the following methods of protection:
1. Tanks gauged at frequent intervals by personnel continuously on the
premises during product
receipt with frequent acknowledged communication maintained with the
supplier so that flow can be
promptly shut down or diverted.
2. Tanks equipped with a high-level detection device that is
independent of any tank gauging
equipment. Alarms shall be located where personnel who are on duty
throughout product transfer can
promptly arrange for flow stoppage or diversion.
3. Tanks equipped with an independent high-level detection system that
will automatically shut down
or divert flow.
4. Alternatives to instrumentation described in 4.6.1.1(2) and
4.6.1.1(3), where approved by the
authority having jurisdiction as affording equivalent protection.
Instrumentation systems covered in 4.6.1.1(2) and 4.6.1.1(3) shall be
electrically supervised or
equivalent.
Formal written procedures required 4.6.1.1 shall include the
following:
1. Instructions covering methods to check for proper line-up and
receipt of initial delivery to
tank designated to receive shipment.
2. Provisions for training and monitoring the performance of operating
personnel by terminal
supervision.
3. Schedules and procedures for inspection and testing of gauging
equipment and high-level
instrumentation and related systems. Inspection and testing intervals
shall be acceptable to the
authority having jurisdiction but shall not exceed 1 year.
Note: Reprinted with permission from NFPA 30-2003 Flammable and
Combustible Liquids Code, Copyright
© 2003, National Fire Protection Association, Quincy, MA 02269.
This reprinted material is not
the complete and official position of the NFPA on the referenced
subject, which is represented only
by the standard in its entirety.
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