Cylinders have to be manufactured employing devices and processes satisfactory in order that each cylinder developed conforms to the requirements of this subpart. No defect is permitted that is probably going to weaken the finished container appreciably.
(iii) If due to welded attachments on the highest head there is inadequate area from which to take a specimen, it could be taken from a agent head of the identical warmth treatment as the test cylinder.
The completed cylinders needs to be uniformly and appropriately warmth treated before checks. Warmth therapy of cylinders in the authorized analyses need to be as follows:
When this portion needs that a packaging be marked with a DOT specification or UN typical marking, marking in the packaging with the suitable DOT or UN markings would be the certification that—
(three) Substance should be recognized by a suitable method that can discover the alloy, the aluminum producer's Forged amount, the answer heat handle batch number along with the whole lot selection.
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Attachments to the container are approved by fusion welding delivered that these attachments are created of weldable chrome steel in accordance with paragraph (b) of this part.
All spun cylinders and plugged cylinders must be analyzed for leakage by fuel or air pressure following the bottom has actually been cleaned and is also free of charge from all dampness, subject to the subsequent conditions:
A specimen has to be cut from a person cylinder of each lot of 200 or significantly less, or welded examination plate. The specimen must be taken from through the key seam and need to be geared up and tested in accordance with and must satisfy get more info the necessities of CGA Pamphlet C-three.
The least wall thickness must be these the wall pressure in the minimal specified exam stress won't exceed 67 % on the minimum amount tensile energy of your steel as determined by the Actual physical checks demanded in paragraphs (j) and (k) of this portion.
The minimum wall thickness needs to be these that the wall strain for the minimal specified take a look at force will never exceed eighty per cent of your minimal yield energy nor exceed 67 per cent of your minimum ultimate tensile strength as confirmed by Bodily tests in paragraph (i) of the part.
(two) All seams in the sphere or cylinders has to be fusion welded. Seams should be of the butt or joggle butt type and indicates must be delivered for carrying out total penetration of the joint.
(i) A gauge length of at least 24 periods the thickness using a width not more than six situations the thickness. The specimen, exclusive of grip ends, may not be flattened. Grip finishes may very well be flattened to within just one inch of every conclusion of your decreased area. When measurement of cylinder won't permit securing straight specimens, the specimens could be taken in almost any location or course and will be straightened or flattened chilly by stress only, not by blows.
(ii) The filling product has to be uniform in high-quality and freed from voids, other than that a nicely drilled to the filling product beneath the valve is approved Should the nicely is filled with a cloth of such style which the features in the filling content are certainly not impaired;
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