(one) Pressure, around similar to but no lower than services pressure, should be placed on a person aspect with the finished base above a region of a minimum of one⁄sixteen of the entire spot of The underside but not under 3⁄4 inch in diameter, such as the closure, for a minimum of a single minute, for the duration of which time one other facet of the bottom exposed to strain has to be protected with drinking water and carefully examined for indications of leakage.
Cylinders should be manufactured making use of gear and procedures satisfactory to make sure that Just about every cylinder developed conforms to the necessities of this subpart. No defect is permitted that is probably going to weaken the completed cylinder appreciably. A reasonably sleek and uniform surface complete is necessary. Heads can be hooked up to shells by lap brazing or can be shaped integrally.
(i) Assuming the cylinder will be to be supported horizontally at its two ends only and to be uniformly loaded in excess of its entire duration consisting of the weight for each unit of duration of the straight cylindrical part crammed with water and compressed to the desired exam strain; the sum of two occasions the maximum tensile worry in The underside fibers as a consequence of bending, in addition that in precisely the same fibers (longitudinal stress), on account of hydrostatic exam pressure might not exceed 80 p.c of your least yield energy of your metal at these types of optimum anxiety. Wall thickness needs to be amplified when needed to satisfy the necessity.
Markings may be stamped to the sidewalls of cylinders using a service tension of one hundred fifty psig if all of the next circumstances are achieved:
(two) All attachments to the sidewalls and heads in the cylinder must be by fusion welding and must be of the weldable content complying with the influence prerequisites of paragraph (l) of the section.
The inspector shall put together a report containing, at a minimum, the applicable information stated in CGA C-eleven. Any additional information and facts or markings which might be needed because of the applicable specification needs to be revealed about the take a look at report. The signature in the inspector within the studies certifies which the procedures of manufacture and heat therapy of cylinders have been noticed and located satisfactory.
(iv) Lasting volumetric enlargement might not exceed ten % of the whole volumetric growth at check pressure.
(iii) On a cylindrical part of the shell that extends further than the recessed base of the cylinder constituting an integral and non-pressure Portion of the cylinder;
(4) If the cylinder surface area is just not originally free in the defects, the floor could be machined or if not addressed to eliminate these defects furnished the least wall thickness is taken care of.
(2) All functions done by, or on behalf of, the individual whose identify or symbol appears as Section of the marking conform to requirements specified in this portion.
(iii) When measurement of cylinder will not allow securing straight specimens, the specimens could more info be taken in almost any location or course and will be straightened or flattened chilly, by tension only, not by blows.
A “root” bend exam specimen have to be Lower from the cylinder or welded exam plate, useful for the tensile take a look at specified in paragraph (l)(1) of the segment and from some other seam or equivalent welded exam plate If your seam is welded by a treatment various from that used for the foremost seam.
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Cylinders should be made utilizing products and procedures adequate in order that Every single cylinder manufactured conforms to the necessities of the subpart and the subsequent:
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