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Markings has to be stamped plainly and completely with a long term attachment or on the steel nameplate forever secured to the container by indicates besides tender solder.Reheat treatment method is licensed for rejected cylinders. Subsequent thereto, cylinders should go all prescribed assessments to generally be satisfactory. Repair service by welding or spinning just isn't licensed.
Strain-retaining products should be determined by any acceptable method that does not compromise the integrity on the cylinder. Plates and billets for hotdrawn cylinders needs to be marked with the heat amount.
Marking should be carried out by stamping into the steel from the cylinder. All markings needs to be legible and Situated on the shoulder.
Cylinders must be produced applying tools and procedures suitable to make certain Every cylinder generated conforms to the necessities of this subpart. No fissure or other defects is permitted that is likely to weaken the completed cylinder appreciably. A fairly smooth and uniform surface area end is necessary. Otherwise initially cost-free from these defects, the surface may very well be machined or in any other case treated to reduce these defects.
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Attachments for the container are authorized by fusion welding presented that such attachments are made of weldable stainless-steel in accordance with paragraph (b) of the section.
(B) With details specifying the type(s) and Proportions from the closures, including gaskets and another elements required to ensure that the packaging is effective at efficiently passing the relevant effectiveness exams. This information and facts have to incorporate any procedures to generally be adopted, which includes closure instructions for interior packagings and receptacles, to properly assemble and close the packaging for the goal of protecting against leakage in transportation.
(three) Every specimen for The stress and Charpy influence exams must be taken in the aspect wall of a cylinder or from a ring which has been heat handled Using the concluded cylinders of which the specimens has to be agent. The axis on the specimens have to be parallel to the axis with the cylinder.
(a) Just about every packaging represented as created to a DOT specification or possibly a UN standard need to be marked over a non-detachable element from the packaging with specification markings conforming towards the relevant specification, and with the subsequent:
(a) By appliances and approaches that should guarantee uniformity of completed containers; Dust and scale to get eradicated as essential; no defect satisfactory get more info that is probably going to weaken the finished container appreciably; moderately clean and uniform surface area finish demanded.
S = Mc/I (iii) To compute the utmost longitudinal tensile stress on account of hydrostatic exam stress, the next system must be utilized:
(ii) In using the “extension below load†system, the total strain (or “extension less than loadâ€), equivalent to the strain at which the 0.two-% long term pressure occurs can be determined with sufficient accuracy by calculating the elastic extension in the gauge size below acceptable load and adding thereto 0.
(ii) Taper threads being of size not below as specified for American Normal taper pipe threads.