(iii) When dimensions of cylinder doesn't permit securing straight specimens, the specimens may very well be taken in almost any locale or course and should be straightened or flattened chilly, by force only, not by blows.
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(i) The remaining cylinders during the ton needs to be examined by the evidence pressure, water-jacket, or immediate enlargement check approach as prescribed in CGA C-1. The bare minimum take a look at pressure must be preserved for the precise timeframe and also the tests products should be calibrated as prescribed in CGA C-one.
(4) When the cylinder area is just not initially cost-free with the defects, the floor can be machined or normally treated to get rid of these defects furnished the minimal wall thickness is preserved.
(two) Cylindrical kind cylinder types has to be of circumferentially welded or brazed construction; longitudinally brazed or silver-soldered seams are also permitted.
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The steel Employed in the construction with the cylinder should be as specified in table 1 of appendix A to this section. The cylinder company need to maintain a record of intentionally added alloying bar178 factors.
(ii) Verifying that the prescribed minimal thickness was met by measuring or witnessing the measurement of your wall thickness; and
The finished containers have to be uniformly and correctly warmth-treated just before assessments. Warmth-cure of containers with the authorized Evaluation should be as follows:
(1) Tension, somewhere around the same as but no lower than company tension, need to be applied to a single facet of the completed base over an area of no less than one⁄sixteen of the full region of the bottom although not lower than 3⁄4 inch in diameter, such as the closure, for at least 1 minute, in the course of which period one other side of the bottom exposed to stress need to be included with water and intently examined for indications of leakage. Except as provided in paragraph (n) of this part, cylinders that happen to be leaking need to be rejected.
Reheat therapy is authorized for turned down cylinders. Subsequent thereto, cylinders must pass all prescribed checks to generally be satisfactory. Restore by welding or spinning isn't approved.
(3) As a security precaution, If your maker elects to produce this test ahead of the hydrostatic examination, the manufacturer should really layout the check equipment so which the strain is placed on the smallest region practicable, within the position of closure, and so as to utilize the smallest attainable volume of air or gas.
(two) The inspector will have to verify ultrasonic inspection of all materials by inspection or by obtaining the fabric producer's certificate of ultrasonic inspection. Ultrasonic inspection must be performed or verified as obtaining been carried out in accordance with paragraph (b)(5) of the section.
Cylinders must be created working with tools and procedures enough in order that Just about every cylinder made conforms to the necessities of this subpart. No defect is permitted that is probably going to weaken the concluded container appreciably.