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(a) Just about every packaging represented as made to your DOT specification or maybe a UN typical needs to be marked with a non-detachable part of your packaging with specification markings conforming to the applicable specification, and with the next:

(ii) The exam needs to be amongst parallel steel plates over a press that has a welded seam at proper angles for the plates. Any projecting appurtenances may be Slice off (by mechanical suggests only) ahead of crushing.

(iii) Straight threads, getting a minimum of four engaged threads, to own tight in good shape and calculated shear energy a minimum of 10 moments the check strain in the cylinder; gaskets expected, satisfactory to forestall leakage.

(iv) More furnished that wall worry for cylinders possessing copper brazed longitudinal seams might not exceed ninety five per cent of any of the above mentioned values. Calculated wall thickness may well not consist of galvanizing or other protective coating.

(two) Steel attachments to cylinders should have rounded or chamfered corners or should be guarded in such a way as to avoid the likelihood of producing puncture or harm to other hazardous materials offers.

(iv) Permanent volumetric expansion might not exceed ten per cent of the full volumetric enlargement at test stress.

The bare minimum wall thickness should be such the wall anxiety in the minimum specified take a look at stress will likely not exceed 80 p.c on the minimum produce strength nor exceed read more sixty seven percent on the minimal best tensile power as verified by Bodily tests in paragraph (i) of this part.

(ii) Taper threads to generally be of duration not below as specified for American Common taper pipe threads.

(three) On the plate attached to the best on the cylinder or long term aspect thereof: enough Area must be still left around the plate to deliver for stamping at the very least six retest dates: the plate have to be a minimum of one⁄16 inch thick and needs to be connected by welding or by brazing in a temperature of at the least 1100 °F, in the course of all edges in the plate.

(ii) The minimum amount test pressure has to be taken care of no less than thirty seconds and adequately for a longer period to make sure full growth. Any inner strain utilized soon after heat-treatment method and previous for the official examination may not exceed 90 % from the examination stress.

(iii) The minimum check strain need to be managed be managed a minimum of 30 seconds and sufficiently for a longer time to be sure finish enlargement. Any interior pressure applied right after heat-remedy and just before the Formal examination might not exceed 90 per cent of your examination force.

(1) The steel Utilized in the construction on the cylinder need to be as laid out in desk one of appendix A to this section. The cylinder manufacturer should keep a report of deliberately included alloying elements.

Varieties 304, 321 and 347 stainless steel are licensed with appropriate welding procedure. A warmth of steel designed beneath the specifications in desk one With this paragraph (b), Examine chemical analysis of and that is marginally outside of the desired vary, is suitable, if satisfactory in all other respects, delivered the tolerances demonstrated in desk 2 With this paragraph (b) usually are not exceeded, apart from as accepted by Affiliate Administrator. The following chemical analyses are approved:

This element prescribes the manufacturing and tests specs for packaging and containers employed for the transportation of dangerous resources in commerce.

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