(two) The look service temperature will be the coldest temperature for which a cylinder is suitable. The essential structure assistance temperatures for every cryogenic liquid is as follows:
(ii) In utilizing the “extension beneath load” method, the whole strain (or “extension beneath load”) corresponding to the pressure at which the 0.2 percent long lasting strain occurs could be decided with sufficient accuracy by calculating the elastic extension with the gauge duration below appropriate load and adding thereto 0.
(i) Assuming the cylinder is to be supported horizontally at its two ends only and to be uniformly loaded about its total duration consisting of the load for every device of length with the straight cylindrical part crammed with drinking water and compressed to the desired examination pressure; the sum of two moments the maximum tensile worry in The underside fibers because of bending, additionally that in the identical fibers (longitudinal tension), on account of hydrostatic check pressure might not exceed 80 % in the minimum amount yield energy in the steel at these kinds of most anxiety. Wall thickness has to be increased when required to meet up with the prerequisite.
Marking should be carried out by stamping into the metal on the cylinder. All markings should be legible and located over a shoulder.
(1) Unless usually said, if a sample cylinder or specimen taken from lots of cylinders fails the prescribed exam, then two further specimens must be picked from your same large amount and subjected into the prescribed check. If both of such fails the take a look at, then your entire great deal have to be turned down.
(iii) For the objective of strain measurement, the Original strain has to be set though the specimen is less than a strain of twelve,000 psig plus the strain indicator looking through has to be set at the calculated corresponding pressure.
(vi) Affect exam specimens should be cooled to the design services temperature. The apparatus for testing the specimens should conform to specifications of ASTM Regular E 23. The test piece, plus the managing tongs, must be cooled for the period of time sufficient to get to the assistance temperature.
(4) As a security precaution, When the maker elects to make this take a look at ahead of the hydrostatic exam, the producer must design the exam equipment so that the pressure is placed on the smallest spot practicable, round the level of closure, and to be able to utilize the smallest doable volume of air or gasoline.
At or ahead of the time of shipping for the purchaser, the cylinder manufacturer needs to have all concluded certification files detailed in CGA C-eleven. The manufacturer of your cylinders have to keep the experiences required by this subpart for 15 many years from the initial take a look at day with the cylinder.
(iv) On a plate connected to the best of your cylinder or long term component thereof; ample Place has to be remaining about the plate to deliver for stamping at least six retest dates; the plate has to be at least one⁄16 inch thick and must be connected by welding, or by brazing at a temperature of at least 1100 °File., during all edges from the plate;
The bare minimum wall thickness have to be these types bar 178 rtp of which the wall worry within the minimum specified examination force will not exceed eighty percent of the minimum amount produce strength nor exceed sixty seven percent of the minimum amount supreme tensile strength as confirmed by physical tests in paragraph (i) of the section.
(2) The inspector have to validate ultrasonic inspection of all materials by inspection or by acquiring the fabric producer's certification of ultrasonic inspection. Ultrasonic inspection have to be executed or confirmed as owning been done in accordance with paragraph (b)(5) of the segment.
Product has to be determined by any suited method. Metal stamping of warmth identifications might not be designed in almost any region which can finally come to be the side wall of the cylinder. Depth of stamping may well not encroach upon the minimal prescribed wall thickness with the cylinder.
(2) Just about every these kinds of 5,000 containers or significantly less, successively made each day, shall constitute a whole lot and Should the test container shall fall short, the lot shall be rejected or 10 added containers could possibly be selected at random and subjected to the take a look at beneath which failure happened.