(iii) For the goal of strain measurement, the Preliminary strain needs to be set when the specimen is underneath a worry of 12,000 psi as well as the pressure indicator looking at staying established within the calculated corresponding pressure.
(iii) The minimum test tension must be managed at least thirty seconds and sufficiently lengthier to be sure total enlargement. Any internal stress applied just after heat-procedure and before the official check may well not exceed 90 percent of the take a look at stress.
This take a look at could possibly be utilized and need to be as required by CGA Pamphlet C-3. The specimen have to be bent until eventually the elongation within the outer surface, adjacent to the foundation of your weld, between the evenly scribed gage strains-a to b, should be at the very least twenty per cent, besides that this proportion might be diminished for steels using a tensile strength in excessive of 50,000 psi, as furnished in paragraph (m) of this area.
(3) When Each individual cylinder is examined into the minimum amount examination pressure, the least exam force has to be taken care of at the very least thirty seconds and adequately lengthier to be sure entire enlargement. Any inner stress applied right after heat-treatment and previous to the Formal exam may well not exceed 90 % in the test pressure.
Marking need to be carried out by stamping into the steel on the cylinder. All markings has to be legible and Positioned with a shoulder.
(4) Identify porosity of filling and tare weights; validate compliance of marking with prescribed needs; receive needed copies of steel shell reviews; and furnish full studies demanded by this specification to the one that has concluded the manufacture of the cylinders and, upon ask for, to your purchaser.
(iii) For the purpose of pressure measurement, the First strain have to be established while the specimen is beneath a worry of twelve,000 psi as well as the pressure indicator examining becoming set at the calculated corresponding strain.
(2) All features performed by, or on behalf of, the person whose title or symbol appears as Portion of the marking conform to needs laid out in this component.
(ii) Acquiring a Licensed chemical analysis from the fabric or cylinder company for every soften, or cast of fabric; or
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(ii) The take a look at needs to be on the weld involving the parallel metal plates over a push having a welded seam, at suitable angles to the plates. Any projecting appurtenances could possibly be Reduce off (by mechanical indicates only) ahead of crushing.
Each and every cylinder, before insulating and jacketing, have to successfully stand up to a force test as follows:
Reheat therapy is authorized for turned down cylinders. Subsequent thereto, cylinders must get more info pass all prescribed tests to become satisfactory. Maintenance by welding or spinning isn't licensed.
Product must be recognized by any acceptable approach except that plates and billets for hotdrawn cylinders should be marked with the heat quantity.