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National Technical Approval
No. Z-40.21-432
(3) Damages and measures to correct damage shall be assessed in consultation with a
competent expert on synthetic materials
(4) In areas subject to earthquakes in earthquake zones 1 to 3 pursuant to DIN 4149
containers shall be adequately secured in their positions.
4.2
Container equipment
(1) The conditions for container equipment are based on the statutory regulations relating
to water, occupational health & safety and construction. If no statutory water or
construction regulations applicable to the container equipment exist, section 9 of the
12
TRbF
shall be observed.
(2) Equipment shall be designed such as to prevent unacceptably high or low pressure
and unacceptable stress on the container wall.
(3) When a suitable limiting value transmitter with a usability certificate by the building
authorities is connected and when a filling system of the type "Füllstart" that has been
granted national technical approval in accordance with Z-40.7-487 is used as well as an
associated non-communicating emptying system with a usability certificate by the building
authorities, the containers used for storing the media in accordance with section 1 (3),
items 1 to 4, may be connected together to form container systems with up to 5 containers
of the same size and type in a row. See section 4.3.3.
(4) A suitable leak detector that has been granted National Technical Approval shall, if
required, be installed between the inner container and the outer container (collecting
container) in accordance with statutory water regulations.
(5) Each container must be equipped with a fill-level indicator.
4.3
Assembly
4.3.1
General
(1) The containers shall be erected vertically in rooms of buildings such as to ensure
adequate possibilities for fire fighting.
(2) The steel foot of the container must stand completely on a flat, unbending and smooth
slab or a carefully sealed and secured flat storage surface.
(3) The containers shall be situated at such a distance from walls, other components and
each other that the fill level, leakage and status can be visually ascertained at all times.
(4) The containers must be protected against impact by vehicles, e.g. by installation in a
protected place, use of collision guards or installation in a suitable area.
(5) The marking sign (engraved sign) and the limiting value transmitter (GWG) with
connection valve shall be located on an accessible side of the container system. The
fill-level indicator must be easily readable.
(6) For media in accordance with section 1(3), items 1 to 4, the reference values for the
installation depth of the limiting value transmitter are specified in National Technical
Approval No. Z-40.7-487 and must be complied with. The limiting value transmitter must
be installed in the first tank (based on the flow direction when filling) of each tank system in
compliance with the installation depth specified for the approved limiting value transmitter.
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Experts from certification and monitoring agencies, and further experts to be named by DIBt on request
11
DIN 4149:2005-04 Buildings in German Earthquake Zones – Design Loads, Dimensioning, Design and
Construction of Conventional Buildings
12
TRbF 20 Technical Regulations for Combustible Liquids, Storage Stations, produced: Federal Labour Gazette
4/2001 p. 60, amended Federal Labour Gazette 2/2002 p. 66, and Federal Labour Gazette 6/2002 p. 63
Z58413.15
National Technical Approval
No. Z-40.21-432
4.3.2
Pipelines
(1) In general, the line used for oil emptying must be a single-line system (without
backflow). If the delivery line must be designed as a two-line system for technical reasons,
the backflow line of the emptying system in the case of container systems – based on the
flow direction when filling – must end in the first container in which the limiting value
transmitter is also installed.
(2) Ventilation lines shall conform to TRbF 20
dimensioned and it will not be possible to seal them off. They and their pipe connections
shall be designed such that they remain tight at a gauge pressure of 0.3 bar. Outlet holes
shall be protected against the ingress of rainwater.
(3) Ventilation lines or devices shall not have their outlet in closed spaces.
(4) Several containers may be connected to the same ventilation line only if the liquids
they store and/or their vapours do not combine to produce dangerous compounds.
(5) When connecting the pipelines to the filling system and/or container nozzles (for single
containers), care shall be taken not to exert any force and to ensure that the containers are
not subjected to any additional, unforeseen external loads.
4.3.3
Installation conditions for storing media according to section 1 (3), items 1 to 4
(1) When storing media according to section 1 (3), items 1 to 4, TRwS 791-1
4.2.2, must be complied with in respect of the installation conditions for containers and
containers in container systems. Taking into account the requirements listed there for the
respective system, the containers may be connected together to form container systems
with up to 5 containers of the same type in a maximum of one row. The loads in terms of
persons as described under letter S in the legend to Table 2 in TRwS 791-1
on a supporting structure, and not directly on the container.
(2) The containers must be secured in place with respect to one another by distance
regulators (distnace pipes/brackets).
4.4
Documentation and confirmation of conformity
The company performing this task shall produce confirmation of conformity that confirms
correct erection, installation and assembly in conformity with the manufacturer's
installation instructions and the provisions of the National Technical Approval, under
consideration of technical approval of the suitability of equipment and accessories. This
confirmation shall be submitted to the operator in each individual case, who will store it in
the building file.
5
Provisions for use, maintenance, servicing and inspection
5.1
Use
5.1.1
Stored liquids
(1) The containers may be used for the storage of liquids hazardous to water as per
section 1 (3), with the limitations mentioned therein.
(2) The storage of contaminated liquids is not permitted if this contamination would change
the behaviour of the material.
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TRwS 791-1:2015-02 Technical rule on substances that are hazardous to water (TRwS) – Heating oil consumer
installations Part 1: Installation, operational requirements and decommissioning of heating oil consumer
installations
Z58413.15
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, possibly with the involvement of the applicant.
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, the
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, section 9.1.2. They shall be adequately
13,
section
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may only act
1.40.21 - 43/15
National Technical Approval
No. Z-40.21-432
5.1.2
Useful container volume
The permissible fill level of the containers may not exceed 95% if no other fill level has
12
been set out by TRbF 20
, section 9.3.2.2.
5.1.3
Documentation
The container manufacturer must give the following documents to the system operator:
-
Copy of National Technical Approval Z-40.21-432,
-
Copy of the technical approval of suitability of an overfill protection device (if included
in scope of delivery),
-
Copy of the technical approval of suitability of a leak detector (if included in scope of
delivery),
-
Installation instructions for container and/or container system erection,
-
Copy of the National Technical Approval. No. Z-40.7-487 for the "Füllstar" filling
system (only for container systems).
5.1.4
Operation
(1) Before commissioning the container or the container system, the operator shall affix a
permanent, visible sign in a suitable location, providing information on the stored liquid as
per section 1 (3), including its density and concentration. Identification required by other
regulations shall not be affected.
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(2) The operating directives of TRbF 20
9
Hazardous to Water
shall be complied with.
(3) Before filling, checks shall be performed to ensure that the liquid in question matches
that on the sign described in paragraph (1), and that the temperature of the liquid will not
result in the exceeding of the permitted operating temperature as per section 1 (3). In
addition, a check shall be carried out to verify how much stored liquid the container can
hold, and whether the overfill protection device is working properly.
(4) The containers must be filled and emptied using firmly attached lines (pipes or hoses),
provided water and occupational safety regulations do not provide for an exception.
(5) Container systems must only be filled using firmly attached pipelines or hoses from
road tank vehicles or portable tanks using a pump with a pump rate of up to
1200 litres/min and at zero pump pressure, up to 10 bar overpressure, provided they are
equipped with the components in accordance with section 4.2 (3).
(6) Filling processes shall be monitored in their entirety. When the filling process is
complete, a check shall be performed to ensure compliance with the permitted fill level as
per section 5.1.2.
(7) The containers may only be transported empty and for the purpose of the application
(stationary storage) described herein. The installation position of the containers when full
or partially full shall not be changed.
(8) Containers shall not be filled alternately with different liquids.
(9) For use of the containers to store used lubricating, hydraulic and heat transfer oils,
collection containers with nozzles for secure connection of a permanent pipe or
removable line are used by trained technicians (not by just anyone).
Z58413.15
National Technical Approval
No. Z-40.21-432
5.2
Maintenance, servicing
(1) The storage facility operator undertakes to entrust container maintenance and cleaning
only to companies that are specialist firms for these activities within the meaning of § 3 of
the Act for Installations Handling Materials Hazardous to Water
been exempted from the obligation to employ a specialist company by German state
regulations, or the manufacturer of the containers performs this work with its own specialist
personnel.
(2) Measures to correct damage shall be clarified with a competent expert in synthetic
10
materials
, possibly with the involvement of the applicant.
(3) Cleaning the inside of containers with solvents (e.g. for an inspection) is not permitted.
The accident prevention regulations, provisions governing the use of chemical cleaning
agents and the disposal of cleaning waste shall be observed.
5.3
Inspections
5.3.1
Performance test/Inspection before commissioning
(1) A performance test shall be performed after erection of the containers and installation
of the necessary pipelines and safety devices. The test shall comprise a visual inspection,
a leak test and the inspection of filling, ventilation and exhaust lines and other equipment.
(2) The performance test does not replace any pre-commissioning inspections required by
the authorities in accordance with water management laws; they may be performed at the
same time, however.
5.3.2
Ongoing Inspections/Inspections after commissioning
(1) The operator shall visually inspect the containers to ensure tightness at least once a
week. If leaks are discovered, the system shall be shut down immediately and the
damaged container drained if necessary.
(2) The performance of the leak detector being used shall be checked for conformity with
the National Technical Approval for this leak detector..
(3) This shall not affect inspections required by other areas of law.
Holger Eggert
Head of Division
Z58413.15
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and the Act on Installations Handling Materials
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unless said activities have
[Official seal of
the DIBt,
Certified
Signature]
1.40.21 - 43/15
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