Open up hearth or electrical furnace metal of uniform top quality needs to be employed. A warmth of metal created under the requirements detailed in Desk 1 During this paragraph (b), a Look at chemical Investigation that is definitely a little bit away from the desired range is appropriate, if satisfactory in all other respects, supplied the tolerances proven in Desk two in this paragraph (b) will not be exceeded.
(2) Every single opening within a spherical sort of cylinder need to be furnished having a fitting, manager, or pad of weldable metal securely hooked up to your cylinder by fusion welding.
(three) A plugged cylinder is one by which a everlasting closure in the bottom of a completed cylinder is effected by a plug.
A single cylinder taken at random out of each and every wide range of 200 or much less, need to be subjected to some flattening take a look at as follows:
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(i) The remaining cylinders in Every large amount needs to be examined by the proof force drinking water-jacket or immediate growth check method as prescribed in CGA C-one. The minimum exam stress needs to be preserved for the precise timeframe along with the screening devices have to be calibrated as prescribed in CGA C-1.
(iii) The bare minimum test strain need to be preserved at least thirty seconds and adequately longer to make sure total expansion. Any inner tension utilized following heat-treatment method and prior to the official examination might not exceed ninety per cent with the take a look at tension.
(iii) Straight threads, getting at the least 4 engaged threads, to possess tight in good shape and calculated shear power no less than ten times the test pressure in the cylinder; gaskets needed, sufficient to circumvent leakage.
The steel Utilized in the development website in the cylinder needs to be as specified in table one of appendix A to this component. The cylinder manufacturer have to maintain a file of intentionally included alloying factors.
Elements needs to be recognized by any acceptable strategy except that plates and billets For warm-drawn containers should be marked with the warmth amount.
(ii) Taper threads needs to be of the duration not less than that specified for American Normal taper pipe threads.
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Cylinders with bottoms closed in by spinning should be subjected into a leakage exam by environment the interior air or fuel force not to fewer than the services pressure. Cylinders which leak must be rejected.
Screening is needed on two (2) specimens faraway from one particular cylinder or section thereof taken at random out of each and every great deal of 200 or much less. Samples needs to be removed right after warmth procedure as illustrated in appendix A to this subpart.