(iv) Additional furnished that wall pressure for cylinders acquiring copper brazed longitudinal seams may not exceed ninety five p.c of any of the above values. Measured wall thickness may well not include things like galvanizing or other protecting coating.
Cylinders should be made making use of devices and procedures satisfactory to ensure that Each and every cylinder generated conforms to the necessities of this subpart. No defect is permitted that is probably going to weaken the concluded cylinder appreciably. A reasonably smooth and uniform floor finish is necessary. Heads might be hooked up to shells by lap brazing or could possibly be formed integrally.
A Actual physical examination need to be performed to determine yield toughness, tensile strength, and elongation as follows:
S = Mc/I (iii) To calculate the maximum longitudinal tensile stress as a consequence of hydrostatic exam tension, the next formulation must be utilized:
(i) If the chosen cylinder passes the h2o-jacket or immediate expansion examination, the remaining cylinders in Each individual lot must be stress analyzed with the proof strain drinking water-jacket or direct expansion test strategy as prescribed in CGA C-1.
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(iii) The least take a look at strain needs to be maintained not less than thirty seconds and adequately more time to ensure comprehensive enlargement. Any interior tension applied right after warmth-procedure and prior to the official test may well not exceed 90 per cent from the take a look at force.
Reheat therapy of rejected cylinders is authorized. Subsequent thereto, cylinders have to move all prescribed checks to be satisfactory. Maintenance of welded seams by welding is approved.
(3) A plugged cylinder is 1 during which a permanent closure in The underside of a completed cylinder has long been effected by a plug.
(iii) When measurement of cylinder doesn't allow securing straight specimens, the specimens could possibly be taken in any site or route and may be straightened or flattened chilly, by stress only, not by blows.
(ii) The exam must be in the weld involving the parallel metal plates over a push by using a welded seam, at proper angles to the plates. Any projecting appurtenances could possibly be cut off (by mechanical suggests only) ahead of crushing.
(two) A spun cylinder is just one during which an close closure from the completed cylinder is welded via the spinning method.
(2) Steel attachments to cylinders should have rounded or chamfered corners or need to be secured in such a fashion as to stop the chance of causing puncture or harm to other dangerous elements packages.
(ii) A person cylinder have to be picked from each ton and become hydrostatically stress tested to destruction. If this cylinder bursts underneath five (5) periods the company strain, then two supplemental cylinders in the exact whole lot because the previously analyzed cylinder should be picked and subjected to this take a look at.