scope:

1.2 Scope

1.2.1 APPLICABILITY

The scope of this recommended practice is specifically limited to petroleum facilities with above ground storage tanks that receive Class I liquids from mainline pipelines or marine vessels. This recommended practice does not apply to the following:

a. Aboveground storage tanks with less than 600 gallons capacity.

b. Aboveground storage tanks with over 600 gallons capacity that receive or contain Class II or Class III liquids.

c. Aboveground storage tanks that contain noncombustible liquids and other nonpetroleum products.

d. Aboveground storage tanks that contain Class I liquids received from other than mainline pipelines or marine transfer (such as receipts from tank trucks, railroad tank cars, transfers from other tanks, facility process units, private pipelines, and crude oil production facilities).

e. Underground storage tanks.

1.2.2 RELATIONSHIP OF THIS RECOMMENDED PRACTICE TO NFPA 30

This document was prepared in accordance with NFPA 30-1993 Edition, Chapter 2-10, which includes the following requirements:

2-10.1 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:

(a) 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.

(b) 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.

(c) Tanks equipped with an independent high level detection system that will automatically shut down or divert flow.

(d) Alternatives to instrumentation described in (b) and (c) where approved by the authority having jurisdiction as affording equivalent protection.

2-10.1.1 Instrumentation systems covered in 2-10.1 (b) and (c) shall be electrically supervised or equivalent.

2-10.2 Formal written procedures required in 2-10.1 shall Include:

(a) Instructions covering methods to check for proper line-up and receipt of initial delivery to tank designated to receive shipment.

(b) Provisions for training and monitoring the performance of operating personnel by terminal supervision.

(c) 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 one year.

Note: The above is reprinted with permission from the National Fire Protection Association (NPFA). 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.