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STANAG 7011

STANAG 7011 automated fuel system monitoring and control equipment

Makers and installers of automated fuel-monitoring and control equipment for stationary fuel storage tanks, and the buyers who specify them.

STANAG 7011 is the NATO agreement setting requirements for automated equipment that monitors fuel level, volume and temperature in stationary fuel storage tanks. NATO has not released it publicly; this page describes it from the Czech defence standard that implements it.

Edition
3
Published
2016-11-29

NATO has not released this STANAG publicly. It is NATO UNCLASSIFIED, and organisations that need it obtain it through their national standardization authority.

What it is

STANAG 7011 is the NATO Standardization Agreement on automated fuel system monitoring and control equipment. Edition 3, promulgated in November 2016 under the sponsorship of NATO's LC, OEC, PHEWG, covers the publication AFLP-7011, edition A. Its subject, as the Czech implementation states it, is establishing basic requirements for the design and characteristics of automated equipment that detects data such as fuel level, volume, temperature and flow during fuel storage in stationary tanks. The requirements apply when designing new storage tanks, and to existing tanks only when they are reconstructed.

NATO has not released STANAG 7011 or AFLP-7011(A) publicly. This page describes them from a public national implementation, the Czech defence standard ČOS 701001 (2nd edition, amendment 1, 2023), which states that it introduces STANAG 7011 edition 3 and AFLP-7011 edition A into Czech use. A national implementation can add national requirements and reservations, so treat what follows as the Czech implementation's content, not as NATO's own text.

What the Czech implementation requires of the monitoring equipment

ČOS 701001 sets design and performance requirements for what it calls the AMZN (automated tank monitoring equipment). The equipment must comply with national workplace-safety, fire-protection and electrical regulations for areas that store and handle petroleum products; it must be intrinsically safe for an explosive environment and compatible with any installed cathodic protection system, and electrical equipment used where hydrocarbon vapours may occur must be approved under the relevant national electrical regulations. It may run from the public grid or an alternative source such as a backup generator, drawing no more than 3 A, with its wiring kept clear of signal cabling to avoid interference, and it must withstand the pressure, temperature and other environmental conditions expected at stationary fuel facilities, operating across 0-100% relative humidity where installed inside a tank.

On performance, the equipment must accurately read fuel level and status at underground and above-ground tanks, on site and during handling, determine any water quantity and level where required, and continuously record dynamic level changes at maximum flow. Digital transmission to the control room must use ASCII coding or an equivalent national protocol, with a graphical interface for computer control. Level measurement must be accurate to within ±1 mm of true fuel height, and average fuel temperature to within ±0.5°C.

Each control room needs a display showing fuel volume in litres or m3 (corrected to 15°C), fuel level in metres and millimetres, fuel temperature, and, where required, water quantity or level, with an audible warning at two limit levels, upper and lower. A display serving a group of tanks must also show the group's total volume, broken out by fuel type where the tanks hold more than one. Materials must not degrade from exposure to fuel or hydrocarbon vapour or affect the stored fuel's quality; in aviation-fuel tanks, metals and alloys must resist corrosion or be protected with an epoxy coating meeting MIL-PRF-4556 or an equivalent national standard, and copper, copper alloys, light-metal alloys with over 4% copper, zinc, zinc alloys, cadmium and lead or lead alloys are barred from components exposed to aviation fuel. Poor placement inside a tank can degrade accuracy, so the equipment must sit clear of the fuel inlet, outlet and pumping units, and must be capable of self-diagnosis and self-compensation.

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How we help

A supplier bound by STANAG 7011 through a contract holds the obtained text through its national authority. In ComplyTrain you record the requirements that apply to you as your own requirements, give each an owner, and keep the evidence that shows you meet them against each one.

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