GERMAN INSTITUTE FOR STRUCTURAL ENGINEERING
Institution under public law
10829, Berlin, 10 June 2005
Kolonnenstraße 30 L
Phone: +49 (0)30 78730-370
Fax:
+49 (0)30 78730-320
Ref.: III 13-1.65.16-1/05
National technical approval
Approval number:
Z-65.16-233
Applicant:
Emerson Process Management
Saab Rosemount Tank Radar AB
Gamlestadsvägen 18B
402 51 Gothenburg
SWEDEN
Subject of approval:
Level sensor (radar antenna) with attached
measurement transducer of type RTG…. as a continual
level measurement device of overfill protectors
Valid until:
30 September 2009
The abovementioned subject of approval is hereby granted national technical approval. This
National technical approval is made up of five pages and two appendices.
Stamp: German
Institute for
Structural
Engineering
74951 05
Page 2 of the National technical approval no. Z-65.16-233 dated 10 June 2005
I. GENERAL PROVISIONS
1
The National technical approval gives proof of the usefulness and practicality of the
subject of the approval in terms of the State Building Regulations.
2
The National technical approval does not replace the authorisations, approvals and
certifications required by law for the completion of construction projects.
3
The National technical approval is issued without prejudice to the rights of third parties, in
particular private property rights.
4
Without prejudice to further regulations in the “Special provisions”, the producer and
distributor of the subject of approval must provide the user/operator of the subject of
approval with copies of the National technical approval and must notify them that the
National technical approval must be available at the place of use. The authorities
involved must be provided with copies of the National technical approval upon request.
5
The National technical approval may only be reproduced in its complete form. The
permission of the German Institute for Structural Engineering must be obtained in order
for extracts of the document to be published. Texts and images in advertising brochures
must not contradict the National technical approval. Translations of the National technical
approval must contain the statement “Translation of the original German version which
has not been inspected by the German Institute for Structural Engineering”.
6
The National technical approval is issued with the understanding that it can be revoked.
The provisions of the National technical approval may be added to or changed at a later
date, particularly if this is required as a result of new technical findings.
Stamp: German
Institute for
Structural
Engineering
74951 05
Page 3 of the National technical approval no. Z-65.16-233 dated 10 June 2005
II. SPECIAL PROVISIONS
1
Subject of approval and area of application
(1) The subject of this National technical approval is a continual level measurement
device which, as part of an overfill protector, serves to prevent overfilling of containers
during the storage of liquids which are hazardous to water. The microwaves produced by
the measurement transducer (radar transmitter) are sent to the surface of the liquid via
the level sensor (radar antenna). The send signals which are reflected on this surface are
received by the antenna. The frequency of the send signal is modulated in a saw tooth
pattern between 9.55 Ghz and 10.65 Ghz (FMCW procedure). The send frequency
changes proportionally to time during the run time in which the microwaves travel to the
liquid surface and back to the antenna. The differential frequency between synchronised
send and receive signals is proportional to the run time and therefore also to the distance
between the level sensor and the surface of the liquid (empty space). The measured
filling level is converted into a binary, electrical signal in the measurement transducer,
and this signal can be used to interrupt the filling process or trigger an acoustic and visual
alarm in good time before the permitted filling level is reached.
(2) The parts of the level sensor which come into contact with the stored liquid, its
vapours or condensate are generally made of austenitic CRNiMo steels. Hastelloy,
titanium, tantalum, Monel, PPS and fluorosilicon may also be used.
Polytetrafluoroethylene (PTFE) must be used for the antennae feeders and PTFE or
silica glass for the antennae window.
The level sensor with attached measurement transducer may be used for containers
under atmospheric conditions and also, depending on the design, for media temperatures
of -40 °C to +400 °C and in the case of excess pressures in the container of up to 25 bar.
The system parts required for the notification or control equipment and the signal
amplifier are not the subject of this National technical approval (refer to Appendix 1 for
the structure of the overflow protector).
(3) This National technical approval merely provides proof of the functionality of the
subject of the approval in the terms of clause (1).
(4) The National technical approval is issued without prejudice to the provisions for
testing or approval of other legal areas (e.g. 1st Ordinance on the Equipment Safety Act,
Low-Voltage Ordinance, Act on the Electromagnetic Compatibility of Equipment, 11 th
Ordinance on the Equipment Safety Act, Ordinance on Explosion Protection).
(5) Due to this National technical approval, the evaluation of compliance and construction
authorisation according to § 19 h of the WHG1 cease to apply for the subject of the
approval.
2
Provisions for the construction product
2.1 Composition and properties
(1) The subject of the approval consists of the level sensor (radar antenna) with the
attached measurement transducer (radar transmitter):
Type RTG 3.20-.-.
(horn antenna)
Type RTG 3.30-.-.
(parabolic antenna)
Type RTG 3.30/A-.-.
(parabolic antenna)
Type RTG 3.40-.-.
(pipe antenna)
Stamp: German
Institute for
Structural
Engineering
1
74951 05
WHG: 19 August 2002
Act on the Arrangement of Water Management (Water Management Act)
Page 4 of the National technical approval no. Z-65.16-233 dated 10 June 2005
Type RTG 3.45-.-.
(pipe antenna)
Type RTG 3.50/.-.-.
(array antenna)
Type RTG 3.60-.-.
(pipe antenna)
The complete type designation corresponds to the key code in accordance with the
Technical description2.
(2) The proof of the functional reliability of the subject of approval in the sense of section
1 clause (1) has been provided in accordance with the “Approval principles for overflow
protectors” of the German Institute for Structural Engineering dated May 1999.
(3) The parts of the overflow protector that are not the subject of this National technical
approval may only be used if they meet the requirements of section 3, “General
construction principles”, and section 4, “Special construction principles” of the “Approval
principles for overflow protectors” of the German Institute for Structural Engineering,
version dated May 1999.
2.2 Production and labelling
2.2.1 Production
The level sensor and the measurement transducer may only be produced in the
applicant’s plant. They must comply with the documents listed in Appendix 2 of this
National technical approval.
2.2.2 Labelling
The level sensor and the measurement transducer, their packaging or their delivery note
must be labelled with the mark of conformity (C mark) by the producer in accordance with
the mark of conformity regulations of the federal states. The labelling may only be made if
the requirements as per section 2.3 have been fulfilled. In addition, the parts of the
subject of approval must also be equipped with type labelling.
2.3 Proof of conformity
2.3.1 General
The confirmation of the conformity of the level sensor and the measurement transducer
with the provisions of this National technical approval must be carried out for the
production plant using a declaration of conformity from the producer on the basis of a
production inspection within the plant and an initial test of the overfill protector by a
recognised test centre.
2.3.2 Internal production inspection
An internal inspection within the production plant must be introduced and carried out. As
part of the internal production inspection, a routine test must be carried out for each
overflow protector or its individual parts. The producer must use the routine test to ensure
that the components correspond to the tested model and that the overflow protector
functions reliably.
The results of the internal production inspection must be recorded and evaluated. The
records must include a minimum of the following information:
- Description of the overflow protector
Stamp: German
- Type of the inspection or test
Institute for
- Date of production and testing of the overflow protector
Structural
- Results of the inspections or tests
- Signature of the person responsible for the internal production inspection. Engineering
Applicant’s technical description for the overflow protector Saab TankRadar Rex type RTG 3 dated 15 March 2004 which
was examined by the TÜV Hannover/Sachsen-Anhalt e.V. (Technical Inspection Authority Hanover/Saxony-Anhalt).
2
74951 05
Page 5 of the National technical approval no. Z-65.16-233 dated 10 June 2005
The records must be kept for a minimum of five years. They must be provided to the
German Institute for Structural Engineering and the responsible senior construction
authorities upon request.
If the test result is not sufficient then the producer must immediately take the measures
needed to remedy the fault. Level sensors and measurement transducers which do not
meet the requirements must be treated in such a manner that it will not be possible for
them to become mixed up with approval subjects which meet with the requirements.
Once the fault has been remedied, the appropriate test must be repeated immediately to
the extent that is technically possible and is required for proof that the fault has been
remedied.
2.3.3 Initial test of the overflow protector by a recognised test centre
The functional tests listed in the “Approval principles for overflow protectors” must be
carried out as part of the initial test. If the evidence on which the National technical
approval is based was taken from samples from routine production then these tests
replace the initial test.
3
Provisions for the design
The level sensor may only be used for liquids hazardous to water against the direct
influence, vapours and condensate of which the materials listed under section 1(2) are
sufficiently resistant.
4
Provisions for the construction
(1) The level sensor and the measurement transducer must be arranged in accordance
with section 1.1 of the Technical description and installed and set up according to
sections 5 and 6 of the description. Only companies who are specialists in the
installation, servicing, maintenance and cleaning of the overflow protector in terms of
§ 19 I WHG and which also have knowledge of fire and explosion protection may be
commissioned to carry out these activities if they are to be carried out on containers for
liquids with flashpoints ≤ 55 °C.
(2) The activities has per (1) do not have to be carried out by specialist companies if they
are exempt from the obligation to use a specialist company in accordance with state
regulations or if the producer of the subject of approval carries out the activities using
their own experienced staff. This does not affect the statutory occupational health and
safety regulations.
(3) Following the alignment of the level measurement device, the parameterisation data
must be protected against overwriting (see section 6 of the Technical description).
5
Provisions for use, maintenance, servicing and repeat tests
(1) The overflow protector must be operated according to the “Approval principles for
overflow protectors” Appendix 1 “Settings notes for overflow protectors of containers”,
and Appendix 2 “Installation and operation guidelines for overflow protectors”. The
Appendices of the Technical description must be supplied by the producer.
(2) The overflow protector must be tested according to section 8 of the Technical
description and in accordance with the requirements of section 6.2 of Appendix 2 of the
“Approval principles for overflow protectors” of the German Institute of Structural
Engineering (version dated May 1999) at appropriate intervals, but this must be no less
than once per year. If there is a risk that the liquid may leave residue on the level sensor
(antenna) then this must be tested more regularly.
Stamp: German
(3) Malfunction and error messages are described in section 4 of the Technical
Institute for
description.
Structural
Signature
Engineering
Dr. (Engineering) Kanning
Certified
74951 05
Images
Captions remain unchanged other than Antennen Fenster = Antenna window
Diagram of the overflow protector
(1) Level sensor
(4a) Message equipment
(2) Measurement transducer
(4b) Control equipment
(3) Signal amplifier
(4c) Actuator
Applicant:
Subject of approval:
Overflow protector with continual level
measurement device
Filling level measurement device
Saab TankRadar Rex
Type RTG 3…
Stamp: German
Institute for
Structural
Engineering
Appendix 1
National
technical
approval
Z-65.16.233
Dated 10.06.2005
Appendix 2 of the National technical approval
Z- 65.16-233 dated 10.06.2005
German Institute of structural engineering
Page 1 (1)
Overflow protector with continual level measurement device for containers used to store liquids that are
hazardous to water
Saab Rosemount TankRadar REX type RTG 3…
Test documents
Description
Certification dwg Block Diagram
Transmitter Head Electronics
Circuit diagram Signal Processing Card
(SPC)
Circuit diagram Relay Output Card
(ROC)
Certification dwg. BAS Principal dwg
TH2015-2019
TCH, Tank Connection Horn antenna
TCP, Tank Connection Parabolic
antenna (old version)
TCP High Pressure, Tank Connection
Parabolic antenna (old version)
TCS, Tank Connection Still Pipe
TCS, Tank Connection Still Pipe High
Pressure
TCG, Tank Connection LPG/LNG w.
ball valve
TCC, Tank Connection Cone
Antenna Parabolic, (New version)
Principle Drawing RTG 3950
Certification drawing, principal dwg
TH2015-2019
Drawing number
9150 072-965
Issue
1
Year/Week
9906
9150 072-301
1
9907
9150 072-304
1
9906
9150 072-951
1
9851
9150 066-851
9150 062-713
B
2
9349
9226
9150 062-714
A
9226
9150 066-721
9150 070-571
A
2
9306
9645
9150 070-781
2
9809
9150 066-884
9240 007-541
9150 070-954
9150 072-951
2
1
1
4
9724
0104
0242
0242
Stamp: German
Institute for
Structural
Engineering
74951 05