kSIST FprEN 13160-5:2012

Leak detection systems - Part 5: Tank gauge leak detection systems

This draft European Standard specifies the requirements for leak detection systems - class IV for use only with liquids as defined in the scope of EN 13352.

Leckanzeigesysteme - Teil 5: Tankinhalts-Leckanzeigesysteme

Dieser Europäische Norm-Entwurf legt Anforderungen an Leckanzeigesysteme – Klasse IV für den Einsatz mit nur den Flüssigkeiten fest, die im Anwendungsbereich von EN 13352 definiert worden sind.

Systèmes de détection de fuites - Partie 5: Systèmes de détection de fuites au moyen de jauges automatiques en citernes

Le présent projet de Norme européenne spécifie les exigences relatives aux systèmes de détection de fuites de classe IV conçus pour une utilisation uniquement avec les liquides comme défini dans le domaine d'application de l'EN 13352.

Sistemi za zaznavanje tesnosti - 5 del: Manometri na rezervoarjih kot sistem za zaznavanje tesnosti

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Jun-2011
• ICS: 23.020.10 - Stationary containers and tanks
• ICS: 23.040.99 - Other pipeline components
• Technical Committee: TLP - Pressure vessels
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 12-Nov-2013
• Due Date: 17-Nov-2013
• Completion Date: 12-Nov-2013
• Ref Project: FprEN 13160-5 - Leak detection systems - Part 5: Tank gauge leak detection systems

Relations

• Revised: SIST EN 13160-5:2004 - Leak detection systems - Part 5: Tank gauge leak detection systems
• Effective Date: 01-Jun-2011
• Revised: SIST EN 13160-5:2004 - Leak detection systems - Part 5: Tank gauge leak detection systems
• Effective Date: 18-Jan-2023
• Revised: SIST EN 13160-5:2016 - Leak detection systems - Part 5: Requirements and test/assessment methods for in-tank gauge systems and pressurised pipework systems
• Effective Date: 01-Nov-2016
• Revised: SIST EN 13160-5:2004 - Leak detection systems - Part 5: Tank gauge leak detection systems
• Effective Date: 19-Jan-2023
• Revised: SIST EN 13160-5:2004 - Leak detection systems - Part 5: Tank gauge leak detection systems
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13160-5:2011
01-junij-2011
Sistemi za kontrolo tesnosti - 5 del: Manometri na rezervoarjih kot sistem za
zaznavanje tesnosti
Leak detection systems - Part 5: Tank gauge leak detection systems
Leckanzeigesysteme - Teil 5: Tankinhalts-Leckanzeigesysteme
Systèmes de détection de fuites - Partie 5: Systèmes de détection de fuites au moyen de
jauges automatiques en citernes
Ta slovenski standard je istoveten z: prEN 13160-5
ICS:
23.020.10 1HSUHPLþQHSRVRGHLQ Stationary containers and
UH]HUYRDUML tanks
23.040.99 Drugi sestavni deli za Other pipeline components
cevovode
oSIST prEN 13160-5:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13160-5:2011

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oSIST prEN 13160-5:2011


EUROPEAN STANDARD
DRAFT
prEN 13160-5
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2011
ICS 23.020.10 Will supersede EN 13160-5:2004
English Version
Leak detection systems - Part 5: Tank gauge leak detection
systems
Systèmes de détection de fuites - Partie 5: Systèmes de Leckanzeigesysteme - Teil 5: Tankinhalts-
détection de fuites au moyen de jauges automatiques en Leckanzeigesysteme
citernes
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 393.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13160-5:2011: E
worldwide for CEN national Members.

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Contents
page
Foreword .4
1 Scope .5
2 Normative references .5
3 Terms, definitions and abbreviated terms .5
3.1 Terms and definitions .5
3.2 Abbreviations .6
4 General .6
5 Dynamic leak detection (category A) .7
6 Statistical quiet period leak detection (category B (1)).7
7 Static tank gauge leak detection (category B (2)A and category B (2)B).7
8 Leak indicating device .7
9 Type testing procedure for leak detection systems using tank gauge data, categories A
and B (1) .8
9.1 Test objective .8
9.2 Test equipment .9
9.3 Test method .9
9.4 Test results analysis and report . 13
9.5 Statistical analysis . 14
10 Type testing procedure for tank gauge leak detection systems category B(2)A and
category B(2)B . 18
10.1 Test objective . 18
10.2 Evaluation . 19
10.3 Test equipment . 19
10.4 Test method . 20
10.5 Test results . 22
10.6 Statistical analysis . 23
Annex A (normative)  Acquisition of field data to provide a standard database for testing
software leak detection systems Categories A and B(1) . 25
A.1 Objective . 25
A.2 Requirements . 26
A.3 Equipment . 27
A.4 Method . 28
A.4.1 Preparation . 28
A.4.2 Tank contents data recording . 28
A.4.3 Delivery records . 29
A.4.4 Data retrieva . 29
A.4.5 Temperature of delivered product . 29
A.4.6 Determination of delivery status . 30
A.5 Data up-loading and verification . 30
Bibliography . 31

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Tables
Table 1 — Performance requirements for categories of leak detection . 7
Table 2 — Selection of data files according to tank capacity and shade temperature . 10
Table 3 — Sequence of tests for leak detection categories A and B (1) . 13
Table 4 — Summary of results from qualitative evaluation . 16
Table 5 — Sequence of tests for leak detection category B(2) . 22
Table A.A1 – Range of parameters . 27

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Foreword
This document (prEN 13160-5:2011) has been prepared by Technical Committee CEN/TC 393 “Equipment for
storage tanks and for filling stations”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13160-5:2004.
This European Standard, EN 13160, Leak detection systems, consists of seven parts:
 Part 1: General principles
 Part 2: Pressure and vacuum systems
 Part 3: Liquid systems for tanks
 Part 4: Liquid and/or vapour sensor systems for use in leakage containments or interstitial spaces
 Part 5: Tank gauge leak detection systems
 Part 6: Sensors in monitoring wells
 Part 7: General requirements and test methods for interstitial spaces, leak protecting linings and leak
protecting jackets
According to EN 13160-5:2004 the following fundamental changes are given:
 a new category for static leak detection systems and the appropriate leak rate for test added.
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1 Scope
This draft European Standard specifies the requirements for leak detection systems – class IV for use only with
liquids as defined in the scope of EN 13352.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 228, Automotive fuels — Unleaded petrol — Requirements and test methods
EN 590, Automotive fuels — Diesel – Requirements and test methods
EN 976-1, Underground tanks of glass-reinforced plastics (GRP) — Horizontal cylindrical tanks for the non-
pressure storage of liquid petroleum based fuels — Part 1: Requirements and test methods for single wall tanks
EN 12285-1, Workshop fabricated steel tanks — Part 1: Horizontal cylindrical single skin and double skin tanks
for the underground storage of flammable and non-flammable water polluting liquids
prEN 13160-1:2010, Leak detection systems — Part 1: General principles
EN 13160-2, Leak detection systems — Part 2: Pressure and vacuum systems
prEN 13160-3, Leak detection systems — Part 3: Liquid systems for tanks
EN 13160-4, Leak detection systems — Part 4: Liquid and/or vapour sensor systems for use in leakage
containments or interstitial spaces
EN 13160-6, Leak detection systems — Part 6: Sensors in monitoring wells
EN 13352:2002, Specification for the performance of automatic tank contents gauges
EN 28601, Data elements and interchange formats — Information interchange — Representation of dates and
times (ISO 8601:1988 and technical corrigendum 1:1991)
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms and definitions given in prEN 13160-1:2010 and the following
apply.
3.1 Terms and definitions
3.1.1
quantitative output
numerical indication of the leak rate estimated for a given test
3.1.2
qualitative output
pass/fail indication for a given test with reference to a specified leak rate
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3.2 Abbreviations
B is the bias
LL is the lower confidence bound for probability of detection
UL is the upper confidence bound for probability of detection
MSE is the mean squared error
PD is the probability of detection
PFA is the probability of false alarm
PI(all) is the proportion of invalid records for all records
PI(leak) is the proportion of invalid records for leaking tanks
PI(tight) is the proportion of invalid records for tight tanks
R is the simulated leak rate
C is the criterion or threshold for indicating a leak
B is the estimated bias of the system
SD is the standard deviation
t is the two-sample t-test bias
b
4 General
General principles shall be according to prEN 13160-1.
Tank gauge leak detection systems shall be divided into two categories of operation:
 Category A: Systems providing leak detection for tanks and pipes, connected with the tank;
 Category B: Systems providing leak detection for tanks only.
The minimum operational performance requirements for each category are contained in Table 1.
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Table 1 — Performance requirements for categories of leak detection
Category Leak rate Maximum time of detection
1
−
l⋅h
A Dynamic leak detection 4,0 24 h
2,0 7 days
0,8 14 days
B(1) Statistical quiet period detection 4,0 24 h
2,0 7 days
0,8 14 days
B(2)A Static leak detection
0,4 6 h
B(2)B Static leak detection 0,1 8 h

In addition to the performance requirements in terms of leak rates specified in Table 1 above, the tank gauge
leak detection system shall be able to detect a large loss of 300 l or more in a maximum time of 30 min.
Any gauge system to be used for any category of leak detection shall have water detection capability
according to EN 13352.
5 Dynamic leak detection (category A)
For this category, the system shall communicate with the metering system, associated with the withdrawal of
product from the storage tank, in order to receive details of all volumes dispensed from the tank. At the specified
leak rate according to Table 1, the system shall have a probability of detection of at least 95 % whilst a false
alarm rate shall not exceed 5 %.
6 Statistical quiet period leak detection (category B (1))
For this category, the system shall be capable of detecting the specified leak rate according to Table 1 with a
probability of at least 95 % whilst operating at a false alarm rate of 5 % or less.
7 Static tank gauge leak detection (category B (2)A and category B (2)B)
For this classification, the system shall be capable, when no product is being dispensed from or delivered to the
tank, of detecting the specified leak rate according to Table 1 with a probability of at least 95 % whilst operating
at a false alarm rate of 5 % or less.
8 Leak indicating device
A leak indicating device shall be provided. In addition for categories A and B, the requirements of a gauge
control device as defined in EN 13352 shall be met. An alarm shall be activated whenever a leak rate is
detected at the specified rate or above, in accordance with Table 1.
Where performance in accordance with Table 1 is not achievable within the required levels of probability, the
results shall be reported as inconclusive.
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9 Type testing procedure for leak detection systems using tank gauge data,
categories A and B (1)
9.1 Test objective
9.1.1 The aim of the test is to assess the suitability of a detection system that uses data on the level
indicator to detect the losses of stored product from:
 in the case of Category A, a storage tank and/or draw-off pipework; or
 in the case of Category B(1), a storage tank.
Tests are performed to determine:
1
−
9.1.1.1 that a leak rate of 4 l⋅h is detected within 24 h with a probability of detection not less than 95 %
and a probability of false alarms not greater than 5 %.
−1
9.1.1.2 that a leak rate of 2 l⋅h is detected within 7 days with a probability of detection not less than
95 % and a probability of false alarms not greater than 5 %.
−1
9.1.1.3 that a leak rate of 0,8 l⋅h is detected within 14 days with a probability of detection not less than
95 % and a probability of false alarms not greater than 5 %.
In each case, tests are performed following an initialisation period equivalent to a maximum of 28 days operation,
during which the system under test processes normal operational data without induced leaks.
9.1.2 Data from a pre-recorded standard test database collected in accordance with annex A will be
submitted to the system under test covering the ranges shown for each of the following (per tank):
9.1.2.1 Daily shade temperature:  -5 °C to +30 °C.
9.1.2.2 Storage tank capacity:   10 000 l to 50 000 l.
9.1.2.3 Average daily throughput (per tank): 1 000 l to 12 000 l per day.
9.1.2.4 Delivery quantity per tank:   2 750 l to 9 500 l.
9.1.2.5 Delivery temperature:   - 5 °C to + 25 °C.
9.1.2.6 Delivery frequency:   2 to 7 per week.
9.1.2.7 Individual dispenser accuracy:  - 0,3 % to + 0,3 % of dispensed volume.
9.1.3 The system under test shall be qualified for use with database files representing at least one of
9.1.3.1 and 9.1.3.2 and, optionally, with 9.1.3.3, 9.1.3.4, 9.1.3.5 and/or 9.1.3.6:
9.1.3.1 Suction draw-off systems (where a hydraulic pumping device is incorporated into the dispenser).
9.1.3.2 Pressurised draw-off systems (where product is transferred from the tank to the dispenser by a
remote pumping unit).
9.1.3.3 Blending dispenser systems (where product from two or more tanks is mixed at the dispenser).
9.1.3.4 Tank manifolding systems (where two or more tanks are connected together such that fuel may
be drawn from the tanks independently).
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9.1.3.5 Tank siphon systems (where two or more tanks are connected together such that fuel cannot be
drawn from the tanks independently).
9.1.3.6  Multiple draw-off (minimum of two dispensers per tank, suction or pressure).
9.1.4 The system under test shall be qualified for use as a Category A or a Category B(1) leak detection
system.
9.1.5 The system under test shall be qualified for use with data corresponding to each type of product in
which it will detect leaks, such as unleaded fuel according to EN 228, diesel fuel according to EN 590.
9.2 Test equipment
The following test equipment will be required:
9.2.1 A computer and associated data transfer peripherals.
9.2.2 Leak simulation and data analysis software, as necessary to process standard test database files
in order to simulate leaks in the data as described in 9.3 and to submit data to the software of the tank gauge
system under test
9.3 Test method
9.3.1 Objective
The objective of the test schedule is to verify that the system under test will return leak test results in accordance
with the criteria of 9.1.1 when data from the standard test database are processed by the leak detection software
following modifications to simulate leaks at various rates.
The manufacturer shall supply the system under test in the form of software loaded onto a computer which is
capable of reading in and processing files from the standard test database. These files will be provided in a
standard format (as defined in annex A) and shall be accepted without any pre-processing.
The manufacturer shall state the initialisation period required for the system under test, which shall not exceed
28 days.
9.3.2 File sorting and selection
A set of files shall be selected from the standard database, which includes data appropriate to those applications
listed in 9.1.3, 9.1.4 and 9.1.5 for which the system under test is to be qualified.
For each type of draw-off system and fuel, the files selected shall meet the following conditions:
For each of the draw-off methods listed in 9.1.3, and each fuel listed in 9.1.5, between 25 % and 75 % of the
data files selected should be taken from tanks where that type of draw-off system or fuel is in use. The same
data file may cover two or more uses, for example a manifolded tank using pressurised draw-off via multiple
dispensers.
Leak detection systems to be tested will provide a quantitative or a qualitative output. A qualitative output will
indicate a pass/fail result in accordance with Table 1.
The minimum sample sizes for data files, which shall be collected for each of these types, are:
a) Systems with a Quantitative Output: ≥ 100 files (not more than 15 from the same tank);

b) Systems with a Qualitative Output:
≥ 240 files (not more than 36 from the same tank).

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The database files shall be sorted to form an ordered data set which is divided into 5 equal groups according to
the 20th, 40th, 60th and 80th percentiles of the recorded range of shade temperature. Each of the five groups
shall be further divided into 3 equal sub-groups, according to the 33rd and 67th percentiles of the recorded range
of tank sizes, such that sub-groupings are determined independently for each of the five groups.
For systems with a quantitative output, three files shall be selected at random from each of the 15 sub-sets, to
provide a sample of 45 files for subsequent evaluation.
For systems with a qualitative output, eight files shall be selected at random from each of the 15 sub-sets, to
provide a sample of 120 files for subsequent evaluation.
For example, for data collected over the ranges of shade temperature and tank capacity as defined in 9.1.2.2
and 9.1.2.3 the files would be sorted as shown in table 2, and n files selected from each sub-set as shown,
where n = 3 for a quantitative system and n = 8 for a qualitative system:
Table 2 — Selection of data files according to tank capacity and shade temperature
Tank Capacity Shade Temperature
20th to 40th 40th to 60th 60th to 80th 80th Percen-
- 5 °°°°C to 20th
Percentile Percentile Percentile Percentile tile to 30 °°°°C
Select n files at Select n files at Select n files at Select n files at Select n files at
10 000 l to 33rd
Percentile random random random random random
33rd to 67th Select n files at Select n files at Select n files at Select n files at Select n files at
Percentile random random random random random
67th Percentile to Select n files at Select n files at Select n files at Select n files at Select n files at
50 000 l random random random random random

9.3.3 Simulated tank leaks (constant)
Leaks from tanks are simulated as a continuous loss of product from the tank at a constant leak rate. The figure
in a record representing the volume of stored product is reduced by a value equivalent to the quantity of product
that would be lost at the specified rate during the time period between the record and its predecessor. The
simulated losses for all previous time periods are accumulated and the total subtracted from the figure
representing stored volume. These accumulated losses are also carried forward through each delivery event
such that the subtracted figure increases monotonous.
Therefore, the volume figure, v , of the ith record is replaced by v ', calculated according to equation (1):
i i
i
()
v = - ∑ -  R (1)
′ v t t
i i j j-1
j=1
where
R is the simulated leak rate;
t is the time stamp of jth record;
j
t -1 is the time stamp of predecessor to jth record.
j
Where tanks are connected via a siphon, the quantity of product corresponding to the leak over the specified
time interval is divided by the number of tanks in the siphon arrangement and this quantity subtracted from the
records for each of the tanks connected via the siphon.
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9.3.4 Simulated tank leaks (variable)
Leaks from tanks are simulated as a continuous loss of product from the tank at a variable leak rate which
reduces as the quantity of stored product is reduced. The figure in a record representing the volume of stored
product is reduced by a value equivalent to the quantity of product which would be lost at a rate specified for the
time period between the record and its predecessor. The records in a file are divided into sets, each of which
comprises all the records between one delivery and the next. Successive records in a set therefore always
exhibit a decrease in stored volume. Where there are n records in a set, and the stored volume of the jth record
is v , the leak rate r for that record is found as a function of the nominal leak rate to be simulated R, according to
j j
equation (2):
n
v
j
= R (2)
r
j
n
∑ v
k
k=1
Therefore, the volume figure, v , of the ith record is replaced by v ', calculated according to equation (3):
i i
i
()
v = - ∑ -  (3)
′ v t t r
i i j j-1 j
j=1
The simulated losses for prior periods are accumulated and similarly subtracted from the figure representing
stored volume. These accumulated losses are also carried forward through each delivery event such that the
subtracted figure increases monotonous.
Where tanks are connected via a siphon, the quantity of product corresponding to the leak over the specified
time interval is divided by the number of tanks in the siphon arrangement and this quantity subtracted from the
records for each of the tanks connected via the siphon.
9.3.5 Simulated pipe leaks (suction and pressurised draw-off)
Leaks from draw-off pipes are simulated as a loss of product from the pipe at a constant leak rate but only while
a dispenser is drawing fuel. Each data file is first processed to accumulate the total time that fuel is being drawn
from the pipe. The total volume of product which would be lost over the duration of the file (T) at a constant leak
rate, R, is calculated and divided by the total dispensing time to give a leak rate, R', during dispensing, see
equation (4):
R _ T
′
R = (4)
n
∑ ( - )
te ts
j j
j=1
where
te is the end time of the jth dispensing transaction;
j
ts is the start time of the jth dispensing transaction;
j
n is the total number of dispensing transactions in the file;
T is the elapsed time from start to end of file.
The figure in a record representing the volume of stored product is reduced by a value equivalent to the quantity
of product which would be lost at the rate R' during the time period between the record and its predecessor, but
only when a dispenser was drawing fuel during that period. The simulated losses for all previous time periods
are accumulated and the total subtracted from the figure representing stored volume in this and all subsequent
records (including periods where no fuel is drawn from the tank). These accumulated losses are also carried
forward over each delivery event such that the subtracted figure increases monotonous.
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Therefore, the volume figure, v , of the ith record is replaced by v ', calculated according to equation (5):
i i
m
′
v = - () -  R (5)
′ v ∑ te ts
i i j j
j=1
where m = number of dispensing transactions whose end time is earlier than the time stamp of the ith record.
Where tanks are connected via a manifold arrangement, the quantity of product corresponding to the leak over
the specified time interval is divided by the number of tanks connected to the manifold and this quantity
subtracted from the records for each of the tanks so connected.
9.3.6 Induced leak rates – Quantitative systems
The selected sample of 45 files is sub-divided at random into four sets, one of 15 files and three of 10 files
each. For each specified leak rate to be detected in accordance with Table 1, simulated leaks are induced in
these sets on the following basis:
a) 15 files: zero leak rate;
b) 10 files: specified leak rate x 0,5;
c) 10 files: specified leak rate;
d) 10 files: specified leak rate x 1,5.
To prevent the system under test rounding identified leak rates to these values, in each set of files the actual
leak rates induced are further randomised in a band of ± 20 % about the leak rates according to 9.3.6, a) to
9.3.6, d).
Where both constant and variable leak rates are to be simulated, the same set of original files are used f
...