(i) The remaining cylinders in Each and every good deal must be tested by the proof pressure, water-jacket, or direct growth examination technique as prescribed in CGA C-1. The bare minimum examination tension needs to be maintained for the particular timeframe along with the screening products needs to be calibrated as prescribed in CGA C-one.
(iii) Each individual ligament which separates two openings has to be at the least 3 times the standard of the diameters of the two openings.
A root bend exam specimen should be Reduce within the cylinder or welded take a look at plate, used for the tensile exam laid out in paragraph (n)(1) of this part. Specimens need to be geared up and analyzed in accordance with and have to meet the requirements of CGA Pamphlet C-3.
(i) The remaining cylinders inside the ton have to be examined via the evidence force, drinking water-jacket, or direct growth test system as prescribed in CGA C-one. The minimum test tension should be maintained for the specific timeframe along with the screening devices needs to be calibrated as prescribed in CGA C-1.
A specimen needs to be faraway from one cylinder of each lots of 200 or much less, or welded examination plate. The welded exam plate need to be of among the list of heats while in the lot of two hundred or less which it represents, in exactly the same affliction and around a similar thickness as the cylinder wall except that in no case must or not it's of the lesser thickness than that needed for 1 / 4 dimensions Charpy effect specimen. The weld need to be made by the exact same processes and subjected to a similar heat cure as the most important weld within the cylinder.
A mechanical test need to be conducted to determine produce strength, tensile toughness, elongation being a percentage, and reduction of place of material as a proportion as follows:
(ii) The exam should be concerning parallel steel plates over a press that has a welded seam at suitable angles for the plates. Any projecting appurtenances might be Lower off (by mechanical implies only) prior to crushing.
(iv) Long-lasting volumetric growth may not exceed ten percent of the total volumetric growth at check pressure.
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(2) Every single opening while in the cylinder, apart from Individuals for protection products, need to be furnished that has a fitting boss, or pad, securely connected on the cylinder by welding or by threads. If threads are made use of they have to adjust to the following:
(iii) The bare minimum test strain needs to be preserved at the very least thirty seconds and adequately for a longer time to guarantee finish enlargement. Any internal strain used right after heat-procedure and just before the official examination might not exceed ninety p.c from the examination strain.
(2) The inspector should verify ultrasonic inspection of all material by inspection or by getting the material producer's certificate of ultrasonic inspection. Ultrasonic inspection must be executed or confirmed as possessing been performed in accordance with paragraph (b)(five) of this section.
(i) A gauge duration of a minimum of 24 periods the thickness with a width not above six instances the thickness. The specimen, exceptional of grip ends, will not be flattened. Grip ends could possibly be flattened to within just a person inch of each and every close with the lessened portion. When sizing of cylinder would not permit securing straight specimens, the specimens could be taken in any area or path and will be bar178 link alternatif straightened or flattened chilly by strain only, not by blows.
The limiting chemical composition of metal licensed by this specification must be as revealed in desk I of appendix A to this aspect.