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BS ISO 1496-3:1995:2006 Edition

BS ISO 1496-3:1995:2006 Edition

$167.15

Series 1 Freight containers. Specification and testing – Tank containers for liquids, gases and pressurized dry bulk

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BSI 2006 34
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1 BRITISH STANDARD
BS ISO 1496-3:1995
Implementation of ISO 1496-3:1995
Series 1 freight containers – Specification and testing –
Part 3: Tank containers for liquids, gases and pressurized dry bulk
2 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1995
Committees responsible for this British Standard
3 Contents
4 National foreword
9 Introduction
1 Scope
1.1 This part of ISO 1496 specifies the basic specifications and testing requirements for ISO series 1 tank containers suitable …
1.2 Except where otherwise stated, the requirements of this part of ISO 1496 are minimum requirements. Tank containers to be use…
1.3 The container types covered by this part of ISO 1496 are given in Table 1.
1.4 The marking requirements for these containers shall be in accordance with the principles embodied in ISO 6346.
2 Normative references
3 Definitions
3.1 tank container
3.2 framework
3.3 tank(s)
3.4 compartment
10 a The ISO type code designation does not imply the approval of any competent authority for the transport of specific goods or products the tank container may carry. The type code depends only on the test pressure (see 6.13).
b The test pressure given is the minimum value of the respective class. Any tank container with a test pressure in the range between a given minimum pressure and the next higher minimum pressure belongs to the lower class.
c 1 bar = 100 kPa. Test pressure is expressed in bars since relevant intergovernmental codes, often implemented by national legislation, retain this unit of pressure.
d The number 70 may, in addition, be used to designate tank containers for which the type code relevant to the test pressure is not used.
3.5 gas
3.6 liquid
3.7 dry bulk
3.8 dangerous goods
3.9 competent authority
3.10 maximum allowable working pressure
3.11 test pressure
3.12 total capacity
3.13 ullage
3.14 test platform
3.15 damping ratio
11 3.16 single degree of freedom system SDOF system
3.17 shock response spectrum SRS
3.18 minimum shock response spectrum minimum SRS
3.19 octave
4 Dimensions and ratings
4.1 External dimensions
4.2 Ratings
5 Design requirements
5.1 General
5.1.1 The ability of the tank container to withstand the specified design loadings shall be established by calculation or test.
5.1.2 The strength requirements for tank containers are given in diagrammatic form in Annex A (these requirements are applicable to all tank containers as complete units except where otherwise stated).
5.1.3 The strength requirements for corner fittings (see also 5.2) are specified in ISO 1161.
5.1.4 The tank container shall be capable of withstanding the test loads and loadings specified in clause 6.
5.1.5 Each tank container shall be designed to withstand the effects of inertia of the tank contents resulting from transport mo…
5.1.6 Each tank container shall be capable of withstanding the requirements of 5.1.5 and the static head produced in the tank co…
5.1.7 As the effects of loads encountered under any dynamic operating condition should only approach, but not exceed, the effect…
5.1.8 Any closure in a tank container, which if unsecured could lead to a dangerous situation, shall be provided with an adequat…
5.1.9 Fork-lift pockets shall not be provided in tank containers.
12 5.1.10 The tank container materials shall be suitable for, or adequately protected from, the cargo and the environment in which the tank container may be operated.
5.1.11 The design of tank containers of types 1AAA and 1BBB shall take into special account the problems of the dynamic instabil…
5.2 Corner fittings
5.2.1 General
5.2.2 Doubler plates
5.3 Base structure
5.3.1 All tank containers shall be capable of being supported by their bottom corner fittings only.
5.3.2 All tank containers, other than 1CC, 1C, 1CX, 1D and 1DX, shall be capable of being supported only by load-transfer areas in their base structure.
5.3.2.1 Consequently, these tank containers shall have end transverse members and sufficient intermediate load-transfer areas (o…
5.3.2.2 The lower faces of the load-transfer areas in the container base structure, including those of the end transverse members, shall lie in one plane located
5.3.2.3 The transfer of load between the underside of any bottom side rails which may be fitted and carrying vehicles is not envisaged.
5.3.2.4 Load-transfer area requirements are given in Annex B.
5.3.3 For 1D and 1DX tank containers, the level of the underside of the base structure is not specified, except insofar as it is implied in 5.3.4 and 5.3.5.
5.3.4 When the tank container is loaded to its rating R, no part of the tank or its associated shell fittings shall project downwards below a plane situated 25 mm4) above the base plane (bottom faces of the bottom corner fittings).
5.3.5 For tank containers under dynamic conditions, or the static equivalent thereof, with the tank container loaded in such a w…
5.4 End structure
13 5.5 Side structure
5.6 Tank
5.6.1 Design and construction
5.6.1.1 Each tank or compartment thereof shall be designed and constructed to good technical practice.
5.6.1.2 Each tank or tanks shall be firmly secured to structural elements of the tank framework. The tank or tanks shall be capable of being filled and emptied without removal from the framework.
5.6.1.3 Tanks or tank compartments without vacuum relief devices shall be designed to withstand an external pressure of at least 40 kPa5) above the internal pressure.
5.6.2 Corrosion allowance
5.6.3 Tank openings
5.6.3.1 All tank openings except those fitted with pressure relief devices shall be provided with adequate closures to prevent accidental escape of the contents.
5.6.3.2 Tank nozzles and outlet fittings shall be substantially made and attached to the tank in such a manner as to minimize th…
5.6.3.3 Any tank opening located below the normal level of the contents and fitted with a valve capable of being operated manual…
5.6.3.4 Stop valves with screwed spindles shall be closed by clockwise motion of the handwheel.
5.6.3.5 All tank connections, such as nozzles, outlet fittings and stop valves, shall be clearly marked to indicate their appropriate functions.
5.6.4 Pressure and vacuum relief devices
5.6.4.1 Each tank or compartment thereof intended to carry non-dangerous cargo shall be fitted with a pressure relief device set…
5.6.4.2 Pressure relief devices, installed as required in 5.6.4.1, should have a minimum relief capacity of 0,05 m3/s of standard air [an absolute pressure of 100 kPa6) at 15 °C].
5.6.4.3 Tanks, or a compartment thereof, intended for the carriage of dangerous goods shall be provided with pressure relief devices meeting the relevant regulations to the satisfaction of the competent authority.
5.6.4.4 Each pressure relief device shall be plainly and permanently marked with the pressure at which it is set to operate.
5.6.4.5 A tank container, or a compartment thereof, with an external design pressure of less than 40 kPa shall be equipped with …
14 5.6.5 Inspection and maintenance openings
5.6.6 Gauging devices
5.6.7 Sealing (customs requirements)
5.7 Optional features
5.7.1 Gooseneck tunnels
5.7.2 Walkways
5.7.3 Ladders
5.7.4 Tank insulation
5.7.5 Tank heating and refrigeration
6 Testing
6.1 General
6.1.1 The symbol P denotes the maximum payload of the container to be tested, that is,
6.1.2 The tank container under test, unless otherwise stated, shall be loaded with a suitable fluid/dry bulk to achieve the test load or loading specified.
15 Table 2 – Forces to be a applied in stacking test
6.1.3 The test loads and loadings specified for all the following tests are minimum requirements.
6.1.4 The dimensional requirements to which reference is made in the requirements clause after each test are those specified in
a) the dimensional and design requirement clauses 4 and 5 of this part of ISO 1496;
b) ISO 668;
c) ISO 1161.
6.2 Test No. 1 – Stacking
6.2.1 General
6.2.2 Procedure
6.2.3 Requirements
6.3 Test No. 2 – Lifting from the four top corner fittings
6.3.1 General
16 6.3.2 Procedure
6.3.3 Requirements
6.4 Test No. 3 – Lifting from the four bottom corner fittings
6.4.1 General
6.4.2 Procedure
6.4.3 Requirements
6.5 Test No. 4 – External restraint (longitudinal)
6.5.1 General
6.5.2 Procedure
6.5.3 Requirements
17 6.6 Test No. 5 – Internal restraint (longitudinal) (dynamic)
6.6.1 General
6.6.2 Procedure
6.6.3 Requirements
6.7 Test No. 6 – Internal restraint (lateral)
6.7.1 General
6.7.2 Procedure
a) by means of supports at the lower end of the base structure of the tank container acting only through the two bottom corner f…
b) by means of supports under the four downward-facing corner fittings.
6.7.3 Requirements
6.8 Test No. 7 – Rigidity (transverse)
6.8.1 General
6.8.2 Procedure
18 6.8.3 Requirements
6.9 Test No. 8 – Rigidity (longitudinal)
6.9.1 General
6.9.2 Procedure
6.9.3 Requirements
6.10 Test No. 9 – Load-transfer area test
6.10.1 General
6.10.2 Procedure
6.10.3 Requirements
6.11 Test No. 10-Walkways (where provided)
6.11.1 General
6.11.2 Procedure
6.11.3 Requirements
6.12 Test No. 11 – Ladders (where provided)
6.12.1 General
19 6.12.2 Procedure
6.12.3 Requirements
6.13 Test No. 12 – Pressure test
6.13.1 General
6.13.2 Procedure
6.13.3 Requirements
7 Identification and marking
7.1 The marking requirements of these tank containers shall be in accordance with the principles embodied in ISO 6346 for the identification and marking of freight containers.
7.2 At least the following data allowing tank identification shall be permanently attached to the tank in a readily accessible p…
a) date of original hydraulic test, year and month;
b) test pressure, in kilopascals and bars;
c) maximum allowable working pressure, in kilopascals and bars;
d) total capacity, in litres;
e) date of hydraulic re-test, year and month;
f) type code designation (optional mark).
7.3 As far as possible, the data plate shall include the information required by the competent authorities, thus reducing to a minimum the number of separate plates required. All data plates should be located as close to one another as possible.
25 Figure B.1 – Zones for longitudinal members
Figure B.2 – Minimum number of pairs of load-transfer areas – 1CC, 1C and 1CX containers (if fitted), and 1BBB, 1BB, 1B and 1BX containers
26 Figure B.3 – Minimum number of pairs of load-transfer areas – 1AA, 1A and 1AX containers without gooseneck tunnel
Figure B.4 – Minimum number of pairs of load-transfer areas – 1AAA, 1AA, 1A and 1AX containers with gooseneck tunnel (with minimum localized structure)
27 Figure B.5 – Minimum requirements for load-transfer areas near the gooseneck tunnel
28 Figure C.1
29 a) a reduction of 10 % or an increase of 20 % in capacity (resulting from variations in diameter and length);
b) a decrease in maximum gross mass;
c) an equal or greater thickness, independent of design pressure and temperature;
d) a change to the grade of material of construction provided that the permitted yield strength meets or exceeds that of the tested container;
e) a change of location or a modification to nozzles and manways.
a) configured so as to allow the container-under-test to be mounted as close as possible to the impacting end;
b) fitted with four securing devices in good condition;
c) equipped with a cushioning device for the purpose of achieving a suitable duration of impact.
a) the test platform striking a stationary mass, or
b) the test platform being struck by a moving mass.
a) Two accelerometers with a minimum amplitude range of 200 g, a maximum lower frequency limit of 1 Hz and a minimum upper frequ…
b) A method of measuring the impact velocity.
c) An analogue-to-digital data acquisition system capable of recording the shock disturbance as an acceleration versus time hist…
d) A method of permanently storing in electronic format the acceleration versus time histories so that they can be subsequently retrieved and analysed.
30 a) The container under test shall be filled with a quantity of water or any other non-pressurized product to approximately 97 % …
b) The container under test shall be placed on the test platform as close as possible to the impacting end, with the container e…
c) Create an impact (D.2.2) such that for a single impact the as tested SRS at both corner fittings equals or exceeds the minimum SRS shown in Figure D.1 at all frequencies within the range 3 Hz to 100 Hz.
d) Examine the container under test for evidence of any faults and record the result.
1) If required, the corrected impact acceleration time history data shall be generated using the procedure outlined in D.2.5.2.
2) The time-history data shall comprise the period commencing 0,05 s prior to the start of the impact event and the 2,0 s thereafter.
3) The analysis shall span the frequency range of 2 Hz to 100 Hz with a minimum of 1/30 octave break points. Each break point, or bin in the range shall constitute a natural frequency, and,
4) A damping ratio of 5 % shall be used in the analysis.
a) Calculate a matrix of relative displacement values, Ki, using all data points from the shock input acceleration time history using the following equation:
b) Calculate a matrix of relative accelerations, Ki, using the displacement values obtained in step 1) in the following equation:
31 c) Retain the maximum absolute acceleration value from the matrix generated in step 2) for the frequency bin under consideration…
d) Generate the test shock response spectrum curve.
a) A critical speed shall already have been established. The critical speed corresponds to the speed where the cushioning device…
b) The critical speed has been established after at least five documented tests using five different tank containers. Each of the tests shall have been performed using the same equipment, measuring system and procedure.
c) The design of the container under test is significantly different from any other 20-ft. tank container having been successfully subjected to the dynamic longitudinal impact test.
32 a) date, time, ambient temperature, and location of test;
b) tank container tare mass, maximum rated mass, and as-tested payload mass;
c) tank container manufacturer, tank type, registration number if applicable, certified design codes and approvals if applicable;
d) test platform mass;
e) impact velocity;
f) direction of impact with respect to tank container;
g) for each impact, an acceleration versus time history for each instrumented corner fitting.
Figure D.1 – Minimum SRS Curve (5 % Damping)
Table D.1 – Tabular representation of some data points for the minimum SRS curve in Figure D.1
34 BS ISO 1496-3:1995

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BS ISO 1496-3:1995
$167.15