WPCD 2B2J| Z~|xTimes New Roman (TT)Arial (TT)Wingdings (TT)C\  P6QPJ2PQP"r P?pQP2? Iphoenix#C\  P6QP# INF WALKERUN/ECE 2nheading 1heading 1G=#g2PQP#USUKUKUS#C\  P6QP#heading 2heading 2J@#XX2PQXP#USUK UKUS#C\  P6QP#heading 3heading 3J@#XP\  P6QXP#USUK UKUS#C\  P6QP#Default Paragraph FoDefault Paragraph Font11#XP\  P6QXP##C\  P6QP#2 |X4 TitleTitleG=#2PQP#USUKUKUS#C\  P6QP#Outline (Not IndenteOutline (Not Indented)G=#XP\  P6QXP#USUKUKUS#C\  P6QP#Outline (Indented)Outline (Indented)G=#XP\  P6QXP#USUKUKUS#C\  P6QP#Table TextTable TextX` hp x (#` hp x #XP\  P6QXP#USUKUKUS#C\  P6QP#` hp x X` hp x (#2Z    ~Number ListNumber List G=#XP\  P6QXP#USUKUKUS#C\  P6QP#First Line IndentFirst Line Indent G=#XP\  P6QXP#USUKUKUS#C\  P6QP#Bullet 2Bullet 2 G=#XP\  P6QXP#USUKUKUS#C\  P6QP#Bullet 1Bullet 1 G=#XP\  P6QXP#USUKUKUS#C\  P6QP#2 hBody SingleBody Single G=#XP\  P6QXP#USUKUKUS#C\  P6QP#Default TextDefault TextG=#XP\  P6QXP#USUKUKUS#C\  P6QP# 3' 3' 6& 6&   'Default Text#XP\  P6QXP#USUK#C\  P6QP#Page#XP\  P6QXP# #Default Text#'Default Text#XP\  P6QXP#USUK#2PQP# INF. 25 #XX2PQXP# COMMITTEE OF EXPERTS ON THE TRANSPORT OF DANGEROUS GOODS Twentieth session Geneva, 716 December 1998 Agenda item 2(a) PORTABLE TANK REQUIREMENTS  Comments on ST/SG/AC.10/1998/53    Transmitted by the expert from the United Kingdom  #&Q2PQ&P# 1. The UK is very supportive of the work undertaken by the expert from the USA in applying a rationalised approach to assigning portable tank requirements to substances. The revised proposals contained in ST/SG/AC.10/1998/53 represent the culmination of considerable work, and the UK is very anxious for this matter to be completed by the end of the current biennium. This INF paper provides a few comments. 2. On the whole the UK fully supports the proposals in ST/SG/AC.10/1998/53 However, the UK has reservations about the approach taken in allocating tank requirements to substances with possible inhalation toxicity characteristics. The fifteenth session of the SubCommittee in July 1998 concluded, after a vote on the principles, not to include additional provisions relating to substances toxic by inhalation, and it was agreed that the need for such work in the next biennium would be considered by the Committee. Therefore, the UK does not agree with paragraph 6 of ST/SG/AC.10/1998/53 which proposes special portable tank provisions for toxic by inhalation substances, especially as these new requirements are significantly more stringent than the current requirements. The UK feels it inappropriate to include such additional requirements at this stage, but rather than hold up the adoption of rationalised approach to portable tank assignment considers that the general approach already agreed for substances for Class 6.1 should be sufficient and would retain existing safety standards. 3. The UK therefore proposes that, in paragraph 6.18 of Annex II to ST/SG/AC.10/1998/53, (noninhalation hazard) be deleted, and the entire paragraph 6.19 either deleted, or placed in square brackets, depending upon the decision of the Committee whether toxic by inhalation substances should be in the work programme for the next biennium. The consequential changes to the allocation of Tcodes are detailed in the attached Annex. 4. In addition, paragraph 6.9 of Annex II to ST/SG/AC.10/1998/53 is not consistent with previous discussions in the ad hoc working group for Division 4.3 PG II and III. The nearest Tcode to that agreed in the ad hoc group is T7, not T11, and the UK proposes that the relevant editorial changes be made to paragraph 6.9 . This only affects UN 3207, PG II and PG III, and their allocation should change from T11 to T7. 4. There also appears to be a few minor errors: (i) UN 1746 BROMINE TRIFLUORIDE use of the rationalised approach suggests that T22, not T20. (ii) UN 2015 HYDROGEN PEROXIDE STABILISED and UN 1873 PERCHLORIC ACID (both Class 5.1 PGI with subsidiary risk 8) use of rationalised approach suggests T10, not T9.#XX2PQXP# ANNEX (see para 3). #Default Text#Table TextX` hp x (#` hp x #XP\  P6QXP#USUK ^ZZg @@@@ZZg @@@@^      #<\  P6QP# UN number #XP\  P6QXP##<\  P6QP# Description #XP\  P6QXP##<\  P6QP# Proposed TCode #XP\  P6QXP##<\  P6QP# Consequences #XP\  P6QXP#     #<\  P6QP#2605#XP\  P6QXP##<\  P6QP#Methoxymethyl Isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.6 rationalised approach for Class 3 PG I, subsidiary risk 6.1. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition.#XP\  P6QXP#     #<\  P6QP#2483#XP\  P6QXP##<\  P6QP#Isopropyl Isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.6 rationalised approach for Class 3 PG I, subsidiary risk 6.1. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition.#XP\  P6QXP#     #<\  P6QP#2481#XP\  P6QXP##<\  P6QP#Ethyl Isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.6 of rationalised approach for Class 3 PG I, subsidiary risk 6.1. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition.#XP\  P6QXP#     #<\  P6QP#2486#XP\  P6QXP##<\  P6QP#Isobutyl Isocyanate#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.4 rationalise approach for Class 3 PG II, subsidiary risk 6.1. More onerous test pressure requirements than UN 9th edition, although 3 bottom openings now allowed.#XP\  P6QXP#     #<\  P6QP#1892#XP\  P6QXP##<\  P6QP#Ethyldichloroarsine#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. same requirements as UN 9th edition.#XP\  P6QXP#     #<\  P6QP#1672#XP\  P6QXP##<\  P6QP#Phenyl Carbylamine#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition.#XP\  P6QXP#     #<\  P6QP#1670#XP\  P6QXP##<\  P6QP#Perchloromethyl mercaptan#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN Recommendations 9th edition.#XP\  P6QXP#     #<\  P6QP#1613#XP\  P6QXP##<\  P6QP#Hydrocyanic Acid#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1605#XP\  P6QXP##<\  P6QP#Ethylene Dibromide#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. slightly more onerous thickness requirements compared to UN 9th edition (6 mm regardless of diameter)#XP\  P6QXP#     #<\  P6QP#1580 #XP\  P6QXP##<\  P6QP#Chloropicrin#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1560#XP\  P6QXP##<\  P6QP#Arsenic Trichloride#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1553#XP\  P6QXP##<\  P6QP#Arsenic acid, liquid#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1541#XP\  P6QXP##<\  P6QP#Acetone Cyanohydrin#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#3006#XP\  P6QXP##<\  P6QP#Thiocarbamate pesticide, liquid,tox#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. the assignment in Annex 1 to T20 probably a typing error.#XP\  P6QXP#     #<\  P6QP#2644#XP\  P6QXP##<\  P6QP#Methyl Iodide#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar, 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2646#XP\  P6QXP##<\  P6QP#Hexachlorocyclo pentadiene#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2232#XP\  P6QXP##<\  P6QP#2Chloroethanal#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements ( 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1098#XP\  P6QXP##<\  P6QP#Allyl alcohol#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar, 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1092#XP\  P6QXP##<\  P6QP#Acrolein,inhibited#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN Recommendations 9th edition#XP\  P6QXP#     #<\  P6QP#2382#XP\  P6QXP##<\  P6QP#Dimethylhydrazine,symetrical#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1695#XP\  P6QXP##<\  P6QP#Chloroacetone stabilised#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. Less onerous (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1722#XP\  P6QXP##<\  P6QP#Allyl Chloroformate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I.#XP\  P6QXP#     #<\  P6QP#2334#XP\  P6QXP##<\  P6QP#Allylamine#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1239#XP\  P6QXP##<\  P6QP#Methyl Chloromethyl Ether#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2488#XP\  P6QXP##<\  P6QP#Cyclohexyl isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2438#XP\  P6QXP##<\  P6QP#Trimethylacetyl chloride#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2521#XP\  P6QXP##<\  P6QP#Diketene#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar, 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1251#XP\  P6QXP##<\  P6QP#Methyl Vinyl Ketone#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#3023#XP\  P6QXP##<\  P6QP#2methyl2heptanethiol#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2487#XP\  P6QXP##<\  P6QP#Phenyl Isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous ( 6 mm regardless of diameter, + frangible disc requirement) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2485#XP\  P6QXP##<\  P6QP#nButyl#XP\  P6QXP# I#<\  P6QP#socyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. Slightly less onerous (5 mm rather than 6mm for smaller diameter tanks, + no frangible disc requirement) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#3009#XP\  P6QXP##<\  P6QP#Copper based pesticide, liquid, toxic, flammable#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#3275#XP\  P6QXP##<\  P6QP#Nitriles,toxic, flammable#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1244#XP\  P6QXP##<\  P6QP#Methylhydrazine#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN Recommendations 9th edition#XP\  P6QXP#     #<\  P6QP#2482#XP\  P6QXP##<\  P6QP#nPropyl Isocyanate #XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. #XP\  P6QXP#     #<\  P6QP#2477#XP\  P6QXP##<\  P6QP#Methyl Isothiocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2337#XP\  P6QXP##<\  P6QP#Pheyl Mercaptan#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2606#XP\  P6QXP##<\  P6QP#Methyl Orthosilicate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I#XP\  P6QXP#     #<\  P6QP#2484#XP\  P6QXP##<\  P6QP#tertButyl Isocyanate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I#XP\  P6QXP#     #<\  P6QP#1238#XP\  P6QXP##<\  P6QP#Methyl Chloroformate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1143#XP\  P6QXP##<\  P6QP#Crotonaldehyde#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar, 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1135#XP\  P6QXP##<\  P6QP#Ethylene Chlorohydrin#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements ( 6 mm regardless of diameter) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1163#XP\  P6QXP##<\  P6QP#Dimethylhydrazine, unsymmetrical#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous requirements (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1182#XP\  P6QXP##<\  P6QP#Ethyl Chloroformate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1752#XP\  P6QXP##<\  P6QP#Chloroacetyl Chloride#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1595#XP\  P6QXP##<\  P6QP#Dimethyl Sulphate#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1809#XP\  P6QXP##<\  P6QP#Phosphorus Trichloride#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I. More onerous (6 bar rather than 4 bar) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#3246#XP\  P6QXP##<\  P6QP#Methanesulphonyl Chloride#XP\  P6QXP##<\  P6QP#T14#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.18 rationalised approach for class 6.1 PG I.#XP\  P6QXP#     #<\  P6QP#1569#XP\  P6QXP##<\  P6QP#Bromoacetone#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.17 rationalised approach for class 6.1 PG II, with or without subsidiary risk. No longer requirement to have a frangible disc (presumably no polymerisation problem)#XP\  P6QXP#     #<\  P6QP#2668#XP\  P6QXP##<\  P6QP#Chloroacetonitrile#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.17 rationalised approach for class 6.1 PG II, with or without subsidiary risk.#XP\  P6QXP#     #<\  P6QP#1834#XP\  P6QXP##<\  P6QP#Sulphuryl Chloride#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1828#XP\  P6QXP##<\  P6QP#Sulphur Chlorides#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1829#XP\  P6QXP##<\  P6QP#Sulphur Trioxide, inhibited#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#2692#XP\  P6QXP##<\  P6QP#Boron Tribromide#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1754#XP\  P6QXP##<\  P6QP#Chlorosulphonic acid#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Requirements more stringent than UN 9th edition, except 6 mm rather than 8 mm.#XP\  P6QXP#     #<\  P6QP#2032#XP\  P6QXP##<\  P6QP#Nitric acid, red fuming#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1744#XP\  P6QXP##<\  P6QP#Bromine, or Bromine solution#XP\  P6QXP##<\  P6QP#T22??#XP\  P6QXP##<\  P6QP#Requirements in UN 9th edition were for 12 mm thickness, whereas application of paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk would suggest T10, which is satisfactory apart from a much lower thickness of 6 mm T22 possibly appropriate instead, although not strictly following rationalised approach.#XP\  P6QXP#     #<\  P6QP#1831#XP\  P6QXP##<\  P6QP#Sulphuric acid, fuming#XP\  P6QXP##<\  P6QP#T10#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.23 rationalised approach for Class 8 PG I, with or without subsidiary risk. Less onerous requirements (6 mm rather than 8 mm) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1838#XP\  P6QXP##<\  P6QP#titanium Tetrachloride#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.22 rationalised approach for Class 8 PG II, with or without subsidiary risk. Different requirements (4 bar rather than 2.65 bar, 3 bottom openings allowed, no frangible disc required) compared to UN 9th edition#XP\  P6QXP#     #<\  P6QP#1810#XP\  P6QXP##<\  P6QP#Phosphorus Oxychloride#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.22 rationalised approach for Class 8 PG II, with or without subsidiary risk. Different requirements (4 bar rather than 2.65 bar, no frangible disc required, and thickness reduction from 6mm to 5mm now allowed for small diameter tanks ) compared to UN 9th ed.#XP\  P6QXP#     #<\  P6QP#2442#XP\  P6QXP##<\  P6QP#Trichloroacetyl Chloride#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.22 rationalised approach for Class 8 PG II, with or without subsidiary risk. Minor thickness reductions now allowed for small diameter tanks.#XP\  P6QXP#        #<\  P6QP#2826#XP\  P6QXP##<\  P6QP#Ethyl Chlorothioformate#XP\  P6QXP##<\  P6QP#T7#XP\  P6QXP##<\  P6QP#Now follows paragraph 6.22 rationalised approach for Class 8 PG II, with or without subsidiary risk.#XP\  P6QXP#!Table Text!Default Text#XP\  P6QXP#USUK