Chapter 6.7 – Provisions for the design, construction, inspection and testing of portable tanks and multiple-element gas containers (MEGCs)

  6.7.2.1 In the definition of "Portable tank", delete the word "transport" in the last but one sentence.

  6.7.2.2.12 Replace four times "*" with "1" and amend the footnote accordingly.

  6.7.2.6.2.1 Replace existing paragraph with the following:

• “.1 An external stop-valve, fitted as close to the shell as reasonably practicable, and so designed as to prevent any unintended opening through impact or other inadvertent act; and".

  6.7.2.8.4 At the end, add the following sentence:

• "In addition, fusible elements conforming to 6.7.2.10.1 may also be used.".

  6.7.2.10.1 In the first sentence, replace "110°C" with "100°C". In the second sentence, replace "in no case shall they" with "when used for transport safety purposes, they shall not". In the third sentence, replace "utilized" with "used" and at the end of the sentence, add "unless specified by special provision TP36 in Column 14 of the Dangerous Goods List of chapter 3.2.".

  6.7.2.20.1 Replace existing paragraph with the following:

• "6.7.2.20.1 Every portable tank shall be fitted with a corrosion-resistant metal plate permanently attached to the portable tank in a conspicuous place readily accessible for inspection. When for reasons of portable tank arrangements the plate cannot be permanently attached to the shell, the shell shall be marked with at least the information required by the pressure vessel code. As a minimum, at least the following information shall be marked on the plate by stamping or by any other similar method:

  • (a) Owner information

    • (i) Owner's registration number;

  • (b) Manufacturing information

    • (i) Country of manufacture;

    • (ii) Year of manufacture;

    • (iii) Manufacturer's name or mark;

    • (iv) Manufacturer's serial number;

  • (c) Approval information

    • (i) The United Nations packaging symbol

 This symbol shall not be used for any purpose other than certifying that a packaging, a portable tank or a MEGC complies with the relevant requirements in chapter 6.1, 6.2, 6.3, 6.5, 6.6 or 6.7;

• (ii) Approval country;

• (iii) Authorized body for the design approval;

• (iv) Design approval number;

• (v) Letters ‘AA', if the design was approved under alternative arrangements (see 6.7.1.2);

• (vi) Pressure vessel code to which the shell is designed;

• (d) Pressures

  • (i) MAWP (in bar gauge or kPa gauge)^footnote

  • (ii) Test pressure (in bar gauge or kPa gauge)^footnote

  • (iii) Initial pressure test date (month and year);

  • (iv) Identification mark of the initial pressure test witness;

  • (v) External design pressure^footnote (in bar gauge or kPa gauge)^footnote

  • (vi) MAWP for heating/cooling system (in bar gauge or kPa gauge)^footnote (when applicable);

• (e) Temperatures

  • (i) Design temperature range (in °C)^footnote

• (f) Materials

  • (i) Shell material(s) and material standard reference(s);

  • (ii) Equivalent thickness in reference steel (in mm)^footnote; and

  • (iii) Lining material (when applicable);

• (g) Capacity

  • (i) Tank water capacity at 20°C (in litres)^footnote

    This indication is to be followed by the symbol "S" when the shell is divided by surge plates into sections of not more than 7,500 litres capacity;

  • (ii) Water capacity of each compartment at 20°C (in litres)^footnote

    (when applicable, for multi-compartment tanks).

    This indication is to be followed by the symbol "S" when the compartment is divided by surge plates into sections of not more than 7,500 litres capacity;

• (h) Periodic inspections and tests

  • (i) Type of the most recent periodic test (2.5-year, 5-year or exceptional);

  • (ii) Date of the most recent periodic test (month and year);

  • (iii) Test pressure (in bar gauge or kPa gauge)^footnote of the most recent periodic test (if applicable);

  • (iv) Identification mark of the authorized body who performed or witnessed the most recent test.

  6.7.2.20.2 Insert at the end of the list, "Portable tank instruction in accordance with 4.2.5.2.6".

  6.7.3.16.1 Replace the existing paragraph with the following:

• "6.7.3.16.1 Every portable tank shall be fitted with a corrosion-resistant metal plate permanently attached to the portable tank in a conspicuous place readily accessible for inspection. When for reasons of portable tank arrangements the plate cannot be permanently attached to the shell, the shell shall be marked with at least the information required by the pressure vessel code. As a minimum, at least the following information shall be marked on the plate by stamping or by any other similar method:

  • (a) Owner information

    • (i) Owner's registration number;

  • (b) Manufacturing information

    • (i) Country of manufacture;

    • (ii) Year of manufacture;

    • (iii) Manufacturer's name or mark;

    • (iv) Manufacturer's serial number;

  • (c) Approval information

    • (i) The United Nations packaging symbol

 This symbol shall not be used for any purpose other than certifying that a packaging, a portable tank or a MEGC complies with the relevant requirements in chapter 6.1, 6.2, 6.3, 6.5, 6.6 or 6.7;

• (ii) Approval country;

• (iii) Authorized body for the design approval;

• (iv) Design approval number;

• (v) Letters ‘AA', if the design was approved under alternative arrangements (see 6.7.1.2);

• (vi) Pressure vessel code to which the shell is designed;

• (d) Pressures

  • (i) MAWP (in bar gauge or kPa gauge)^footnote

  • (ii) Test pressure (in bar gauge or kPa gauge)^footnote

  • (iii) Initial pressure test date (month and year);

  • (iv) Identification mark of the initial pressure test witness;

  • (v) External design pressure^footnote (in bar gauge or kPa gauge)^footnote;

• (e) Temperatures

  • (i) Design temperature range (in °C)^footnote

  • (ii) Design reference temperature (in °C)^footnote

• (f) Material

  • (i) Shell material(s) and material standard reference(s);

  • (ii) Equivalent thickness in reference steel (in mm)^footnote

• (g) Capacity

  • (i) Tank water capacity at 20°C (in litres)^footnote

• (h) Periodic inspections and tests

  • (i) Type of the most recent periodic test (2.5-year, 5-year or exceptional);

  • (ii) Date of the most recent periodic test (month and year);

  • (iii) Test pressure (in bar gauge or kPa gauge)^footnote of the most recent periodic test (if applicable);

  • (iv) Identification mark of the authorized body who performed or witnessed the most recent test.

  6.7.3.16.2 Insert at the end of the list, "Portable tank instruction in accordance with 4.2.5.2.6".

  6.7.4.14.4 In the first sentence the words "inspection and test" are replaced with "inspections and tests". And the second sentence is replaced with the following:

• "In the case of non-vacuum insulated tanks, the jacket and insulation shall be removed during the 2.5-year and the 5-year periodic inspections and tests, but only to the extent necessary for a reliable appraisal."

  6.7.4.15.1 Replace the existing paragraph with the following:

• "6.7.4.15.1 Every portable tank shall be fitted with a corrosion-resistant metal plate permanently attached to the portable tank in a conspicuous place readily accessible for inspection. When for reasons of portable tank arrangements the plate cannot be permanently attached to the shell, the shell shall be marked with at least the information required by the pressure vessel code. As a minimum, at least the following information shall be marked on the plate by stamping or by any other similar method:

  • (a) Owner information

    • (i) Owner's registration number;

  • (b) Manufacturing information

    • (i) Country of manufacture;

    • (ii) Year of manufacture;

    • (iii) Manufacturer's name or mark;

    • (iv) Manufacturer's serial number;

  • (c) Approval information

    • (i) The United Nations packaging symbol

 This symbol shall not be used for any purpose other than certifying that a packaging, a portable tank or a MEGC complies with the relevant requirements in chapter 6.1, 6.2, 6.3, 6.5, 6.6 or 6.7;

• (ii) Approval country;

• (iii) Authorized body for the design approval;

• (iv) Design approval number;

• (v) Letters ‘AA', if the design was approved under alternative arrangements (see 6.7.1.2);

• (vi) Pressure vessel code to which the shell is designed;

• (d) Pressures

  • (i) MAWP (in bar gauge or kPa gauge)^footnote

  • (ii) Test pressure (in bar gauge or kPa gauge)^footnote

  • (iii) Initial pressure test date (month and year);

  • (iv) Identification mark of the initial pressure test witness;

• (e) Temperatures

  • (i) Minimum design temperature (in °C)^footnote

• (f) Material

  • (i) Shell material(s) and material standard reference(s);

  • (ii) Equivalent thickness in reference steel (in mm)^footnote

• (g) Capacity

  • (i) Tank water capacity at 20°C (in litres)^footnote

• (h) Insulation

  • (i) Either "Thermally insulated" or "Vacuum insulated" (as applicable);

  • (ii) Effectiveness of the insulation system (heat influx) (in Watts)^footnote;

• (i) Holding times – For each refrigerated liquefied gas permitted to be transported in the portable tank:

  • (i) Name, in full, of the refrigerated liquefied gas;

  • (ii) Reference holding time (in days or hours)^footnote

  • (iii) Initial pressure (in bar gauge or kPa gauge)^footnote

  • (iv) Degree of filling (in kg)^footnote

• (j) Periodic inspections and tests

  • (i) Type of the most recent periodic test (2.5-year, 5-year or exceptional);

  • (ii) Date of the most recent periodic test (month and year);

  • (iii) Identification mark of the authorized body who performed or witnessed the most recent test.

  6.7.4.15.2 Insert "Portable tank instruction in accordance with 4.2.5.2.6" at the end of the list.

  6.7.5.2.1 In the last sentence the words "cargo transport unit" are replaced by the word "vehicle".

  6.7.5.2.8 Replace four times "*" with "1" and amend the footnote accordingly.

  6.7.5.4.1 Replace the third sentence with the following:

• "If so required by the competent authority of the country of use, MEGCs for other gases shall be fitted with pressure relief devices as specified by that competent authority.".

  6.7.5.13.1 Replace the existing paragraph with the following:

• "6.7.5.13.1 Every MEGC shall be fitted with a corrosion-resistant metal plate permanently attached to the MEGC in a conspicuous place readily accessible for inspection. The metal plate shall not be affixed to the elements. The elements shall be marked in accordance with chapter 6.2. As a minimum, at least the following information shall be marked on the plate by stamping or by any other similar method:

  • (a) Owner information

    • (i) Owner's registration number;

  • (b) Manufacturing information

    • (i) Country of manufacture;

    • (ii) Year of manufacture;

    • (iii) Manufacturer's name or mark;

    • (iv) Manufacturer's serial number;

  • (c) Approval information

    • (i) The United Nations packaging symbol

 This symbol shall not be used for any purpose other than certifying that a packaging, a portable tank or a MEGC complies with the relevant requirements in chapter 6.1, 6.2, 6.3, 6.5, 6.6 or 6.7;

• (ii) Approval country;

• (iii) Authorized body for the design approval;

• (iv) Design approval number;

• (v) Letters ‘AA', if the design was approved under alternative arrangements (see 6.7.1.2);

• (d) Pressures

  • (i) Test pressure (in bar gauge)^footnote

  • (ii) Initial pressure test date (month and year);

  • (iii) Identification mark of the initial pressure test witness;

• (e) Temperatures

  • (i) Design temperature range (in °C)^footnote

• (f) Elements/Capacity

  • (i) Number of elements;

  • (ii) Total water capacity (in litres)^footnote

• (h) Periodic inspections and tests

  • (i) Type of the most recent periodic test (5-year or exceptional);

  • (ii) Date of the most recent periodic test (month and year);

  • (iii) Identification mark of the authorized body who performed or witnessed the most recent test.