(i) The remaining cylinders in Each and every whole lot need to be analyzed because of the evidence tension, drinking water-jacket, or immediate expansion take a look at technique as prescribed in CGA C-one. The minimum take a look at force has to be managed for the particular timeframe as well as testing machines have to be calibrated as prescribed in CGA C-one.
(two) Heat treatment method isn't demanded after the welding or brazing of weldable small carbon areas to attachments of similar content that have been previously welded or brazed to the very best or base of cylinders and properly heat dealt with, provided these kinds of subsequent welding or brazing would not create a temperature in surplus of four hundred °File in any Section of the best or bottom materials.
Force-retaining products should be recognized by any acceptable technique that doesn't compromise the integrity of your cylinder. Plates and billets for hotdrawn cylinders should be marked with the warmth number.
Following pressure tests, a flattening exam needs to be executed on a person cylinder taken at random out of every lots of 200 or much less by inserting the cylinder among wedge-formed knife edges getting a 60 diploma provided angle, rounded to the 50 percent-inch radius.
(2) When the cylinders are heat treated in a continual furnace, two rigidity specimens and 3 Charpy affect specimens have to be examined from one of many cylinders or possibly a examination ring from Every four several hours or fewer of generation. Nevertheless, in no case might a test lot based on this production interval exceed two hundred cylinders.
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(iv) Lasting volumetric growth may not exceed ten % of the total volumetric growth at check tension.
Reheat remedy is authorized for just a rejected cylinder in accordance with this paragraph (n). Immediately after reheat treatment method, a cylinder must move all prescribed exams Within this part being regarded as suitable. Maintenance of brazed seams by brazing and welded seams by welding is authorized.
(ii) In using the “extension below load” technique, the total pressure (or “extension underneath load”) corresponding to the worry at which the 0.2 % lasting pressure takes place may be established with sufficient accuracy by calculating the elastic extension of the gauge size below suitable load and introducing thereto 0.
(iv) Over a plate attached to the best with the cylinder or long-lasting aspect thereof; enough Place need to be left around the plate to provide for stamping a minimum of six retest dates; the plate needs to be at least one⁄sixteen inch thick and have to be connected by welding, or by brazing at a temperature of at least 1100 °File., through all edges on the plate;
Material needs to be determined by any ideal technique apart from that plates and billets For warm-drawn cylinders has to be marked with the heat selection.
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The seamless hemispheres and cylinders could possibly be worry relieved or annealed for forming. Welded container must be tension relieved at a temperature of 775 °F ±25° right after course of action procedure and before hydrostatic test.
(iv) Lasting volumetric expansion may not exceed ten p.c of the total volumetric growth at read more take a look at tension.