Not known Details About bar 178 rtp
Not known Details About bar 178 rtp
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(iv) Even more provided that wall strain for cylinders acquiring copper brazed longitudinal seams might not exceed ninety five percent of any of the above values. Calculated wall thickness may not include galvanizing or other protecting coating.
(i) The remaining cylinders in Every great deal should be force analyzed with the evidence pressure, drinking water-jacket or direct expansion exam strategy as prescribed in CGA C-1. The minimum amount examination strain needs to be preserved for the specific timeframe plus the tests devices must be calibrated as prescribed in CGA C-1.
(4) As a security precaution, In the event the producer elects to generate this take a look at ahead of the hydrostatic test, the manufacturer need to style the take a look at equipment so which the force is placed on the smallest location practicable, within the issue of closure, and so as to utilize the smallest attainable quantity of air or fuel.
This exam can be utilised and have to be as necessary by CGA Pamphlet C-3. The specimen must be bent right until the elongation within the outer floor, adjacent to the root of your weld, amongst the lightly scribed gage lines-a to b, is at the least twenty percent, apart from this proportion can be lessened for steels getting a tensile energy in excess of 50,000 psi, as furnished in paragraph (k) of this segment.
This check may very well be utilised and have to be as necessary by CGA Pamphlet C-3. The specimen should be bent until eventually the elongation in the outer surface, adjacent to the foundation in the weld, amongst the evenly scribed gage strains-a to b, have to be at least 20 per cent, except this proportion could be lowered for steels aquiring a tensile power in extra of 50,000 psi, as furnished in paragraph (m) of the segment.
(iv) Everlasting volumetric expansion may well not exceed 10 percent of the overall volumetric enlargement at examination pressure.
(vi) Influence examination specimens must be cooled to the look provider temperature. The apparatus for screening the specimens must conform to specifications of ASTM Common E 23. The examination piece, plus the handling tongs, have to be cooled for just a length of time ample to reach the company temperature.
(1) Welding or brazing is licensed for your attachment of neckrings and footrings that happen to be non-stress elements, and only to your tops and bottoms of cylinders aquiring a provider force of 500 psig or significantly less.
(iii) For the goal of strain measurement, the Original strain reference need to be established although the specimen is below a pressure of 12,000 psi as well as strain indicator reading being established for the calculated corresponding pressure.
A specimen have to be cut from just one cylinder of every lot of 200 or fewer, or a welded take a look at plate. The welded test plate has to be of on the list of heats from the lots of 200 or less which it represents, in the same issue and approximately the exact same thickness as the cylinder wall apart from that it may not be of a lesser thickness than that necessary for 1 / 4 dimensions Charpy affect specimen. The weld has to be produced by the same processes and subjected to exactly the same heat cure as the key weld around the cylinder.
(iii) For the goal of pressure measurement, the Original strain has to be set while the specimen is beneath a anxiety of twelve,000 psi and the strain indicator here reading through currently being established on the calculated corresponding strain.
Notwithstanding the variation furnished Within this paragraph, Each and every container have to if not conform to your DOT 2Q container in accordance with § 178.33a. The following conditions also use beneath Variation 1—
Material should be determined by any appropriate method. Steel stamping of warmth identifications may not be built in almost any region which will at some point come to be the facet wall from the cylinder. Depth of stamping may not encroach upon the bare minimum prescribed wall thickness of your cylinder.
(3) As a safety precaution, Should the producer elects for making this take a look at ahead of the hydrostatic check, the maker should layout the take a look at apparatus so the strain is applied to the smallest spot practicable, within the point of closure, and to be able to utilize the smallest doable volume of air or fuel.