Page 1 of the National technical approval no. Z-65.16-233 dated 10 June 2005
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:
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.
I. General Provisions
1The National technical approval gives proof of the usefulness and practicality of the subject of the approval in terms of the State Building Regulations.
2The National technical approval does not replace the authorisations, approvals and certifications required by law for the completion of construction projects.
3The National technical approval is issued without prejudice to the rights of third parties, in particular private property rights.
4Without 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.
5The 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”.
6The 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.
II. SPECIAL Provisions
1Subject 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, 11th 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 WHG[1] cease to apply for the subject of the approval.
2Provisions for the construction product
2.1Composition 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)
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 description[2].
(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.
2.2Production and labelling
2.2.1Production
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.
2.2.2Labelling
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.
2.3Proof of conformity
2.3.1General
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.
2.3.2Internal 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
Type of the inspection or test
Date of production and testing of the overflow protector
Results of the inspections or tests
Signature of the person responsible for the internal production inspection.
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.
2.3.3Initial 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.
3Provisions 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.
4Provisions 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).
5Provisions 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.
(3) Malfunction and error messages are described in section 4 of the Technical description.
Signature
Dr. (Engineering) KanningCertified
74951 05
ImagesCaptions 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… / Appendix 1
National
technical
approval
Z-65.16.233
Dated 10.06.2005
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 / Drawing number / Issue / Year/WeekCertification dwg Block Diagram Transmitter Head Electronics / 9150 072-965 / 1 / 9906
Circuit diagram Signal Processing Card (SPC) / 9150 072-301 / 1 / 9907
Circuit diagram Relay Output Card (ROC) / 9150 072-304 / 1 / 9906
Certification dwg. BAS Principal dwg TH2015-2019 / 9150 072-951 / 1 / 9851
TCH, Tank Connection Horn antenna / 9150 066-851 / B / 9349
TCP, Tank Connection Parabolic antenna (old version) / 9150 062-713 / 2 / 9226
TCP High Pressure, Tank Connection Parabolic antenna (old version) / 9150 062-714 / A / 9226
TCS, Tank Connection Still Pipe / 9150 066-721 / A / 9306
TCS, Tank Connection Still Pipe High Pressure / 9150 070-571 / 2 / 9645
TCG, Tank Connection LPG/LNG w. ball valve / 9150 070-781 / 2 / 9809
TCC, Tank Connection Cone / 9150 066-884 / 2 / 9724
Antenna Parabolic, (New version) / 9240 007-541 / 1 / 0104
Principle Drawing RTG 3950 / 9150 070-954 / 1 / 0242
Certification drawing, principal dwg TH2015-2019 / 9150 072-951 / 4 / 0242
74951 05
[1]WHG: 19 August 2002Act on the Arrangement of Water Management (Water Management Act)
[2]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).