(iii) For the goal of pressure measurement, the Original pressure should be set when the specimen is below a stress of twelve,000 psi along with the pressure indicator looking at staying established in the calculated corresponding pressure.
(iii) The minimum amount check tension should be preserved at the very least thirty seconds and adequately extended to make certain entire enlargement. Any inside force applied soon after heat-cure and just before the official examination may not exceed ninety per cent of your test tension.
(one) The results from the exam should conform to a minimum of the least suitable mechanical residence limitations for aluminum alloys as specified in paragraph (b) of the part.
Heads attached by brazing needs to have a driving healthy With all the shell, unless the shell is crimped, swedged, or curled in excess of the skirt or flange of The pinnacle, and become carefully brazed right up until full penetration by the brazing substance from the brazed joint is secured. Depth of brazing with the joint needs to be not less than 4 (four) times the minimum amount thickness of shell metal.
(4) As a safety precaution, When the producer elects to produce this take a look at prior to the hydrostatic examination, the producer shall design and style the check apparatus so that the tension is placed on the smallest region practicable, across the issue of closure, and in order to use the smallest attainable quantity of air or gasoline.
(b) Each and every this sort of 25,000 containers or much less, successively developed a day, shall constitute lots and When the test container shall fail, the lot shall be turned down or 10 more containers may very well be chosen at random and subjected to the exam beneath which failure happened.
(ii) A single specimen have to be taken from either head with a cylinder when both of those heads are created of a similar substance. However, if The 2 heads are made of differing resources, a specimen has to be taken from Each and every head.
(i) The remaining cylinders while in the great deal must be analyzed from the proof tension, drinking water-jacket, or direct enlargement take a look at technique as prescribed in CGA C-one. The minimum exam stress has to be maintained for the precise timeframe and the tests tools must be calibrated as prescribed in CGA C-1.
(ii) Getting a Accredited chemical Investigation from the fabric or cylinder manufacturer for every melt, or cast of fabric; or
(i) The remaining cylinders in Just about every good deal needs to be analyzed from the evidence tension h2o-jacket or immediate enlargement take a look at method as prescribed in CGA C-one. The least check stress has to be managed for the particular timeframe as well as the tests equipment has to be calibrated as prescribed in CGA C-1.
(three) Without cost standing cylinders, The bottom thickness needs to be at the least two occasions the minimal wall thickness along the road of Make contact with involving the cylinder base and the floor in the event the cylinders are in the vertical placement.
Mechanical tests must be executed to determine yield toughness, tensile strength, elongation as a percentage, and reduction of location of material as a percentage, as follows:
(4) As a security precaution, Should the manufacturer elects to help make this check ahead of the hydrostatic examination, he must design his equipment so that the tension is placed on the smallest location practicable, around the issue of closure, and so as to utilize the smallest possible volume of air or gas.
(iv) more info On a plate hooked up to the best from the cylinder or long term part thereof; enough Area should be still left about the plate to provide for stamping at least six retest dates; the plate must be at least 1⁄16 inch thick and has to be hooked up by welding, or by brazing in a temperature of at least 1100 °F., during all edges from the plate;