A Review Of situs bar178
A Review Of situs bar178
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(i) The remaining cylinders in Each individual whole lot have to be analyzed because of the proof tension, drinking water-jacket, or direct enlargement test strategy as prescribed in CGA C-one. The minimal exam stress need to be maintained for the precise timeframe along with the testing products must be calibrated as prescribed in CGA C-one.
(2) A spun cylinder is a person through which an finish closure within the finished cylinder has become welded by the spinning procedure.
(3) When Every cylinder is analyzed to your minimum exam force, the minimum check strain should be maintained a minimum of 30 seconds and sufficiently for a longer time to be sure complete growth. Any interior tension applied soon after heat-treatment method and previous on the official examination may well not exceed ninety percent from the exam stress.
(two) A plugged cylinder is just one wherein a long term closure in The underside of a concluded cylinder continues to be effected by a plug.
(ii) Circumferential seams must be made by welding or by brazing. Heads attached by brazing should have a driving in shape While using the shell Unless of course the shell is crimped, swedged, or curled over the skirt or flange of The pinnacle and have to be thoroughly brazed until finally entire penetration from the brazing materials on the brazed joint is secured. Depth of brazing from conclude of your shell have to be at the very least four (four) situations the thickness of shell steel.
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(iv) Long lasting volumetric growth might not exceed ten per cent of the entire volumetric growth at examination force.
The steel used in the construction in the cylinder must be as specified in desk 1 of appendix A to this section. The cylinder maker must keep a document of intentionally additional alloying components.
A root bend check specimen has to be removed from the cylinder or welded exam plate used for the tensile test laid out in paragraph (m)(1) of this segment. Specimens has to be taken from through the longitudinal seam and needs to be prepared and analyzed in conformance with the requirements of CGA C-3.
(4) A exam cylinder or examination ring want signify only on the list of heats inside a furnace batch furnished the opposite heats in the batch have Earlier been tested and have handed the checks Which these types of exams do not signify in excess of 200 cylinders from Anyone heat.
Just before the initial cargo of any distinct cylinder layout, cyclic pressurization tests ought to are already done on a minimum of a few representative samples devoid of failure as follows:
In which: S = Tensile stress in psi; A1 = Interior area in cross part of cylinder in square inches; P = Hydrostatic check tension-psig; A2 = Location of metallic in cross section of cylinder in sq. inches.
(three) As a safety precaution, In the event the maker elects to create this check prior get more info to the hydrostatic examination, the producer must layout the exam apparatus so the strain is applied to the smallest spot practicable, within the point of closure, and in order to use the smallest probable quantity of air or gasoline.