One particular cylinder taken at random out of each wide range of cylinders should be hydrostatically tested to destruction.
(iv) Over a plate hooked up to the best from the cylinder or long-lasting aspect thereof; enough House should be left on the plate to provide for stamping not less than six retest dates; the plate must be a minimum of one⁄sixteen-inch thick and has to be hooked up by welding at a temperature of 1,a hundred °File, throughout all edges on the plate.
(3) A plugged cylinder is one particular during which a everlasting closure in the bottom of the completed cylinder has actually been effected by a plug.
Typical taper pipe threads needed in all openings. The length in the opening might not be a lot less than as specified for American Standard pipe threads; tapped to gauge; clear cut, even, and with no checks.
(i) If the selected cylinder passes the water-jacket or direct enlargement examination, the remaining cylinders in Every single ton should be tension tested through the proof force h2o-jacket or direct enlargement take a look at process as prescribed in CGA C-one.
(iii) Everlasting volumetric growth may well not exceed ten percent of overall volumetric expansion at examination stress.
(b) A UN normal packaging for which the UN common is about forth in this aspect may very well be marked Together with the United Nations image along with other specification markings only if it entirely conforms to the necessities of this portion.
(one) Welding or brazing is approved for that attachment of neckrings and footrings which happen to be non-tension pieces, and only to your tops and bottoms of cylinders using a company tension of 500 psig or much less.
(3) Every specimen for The strain and Charpy affect assessments should be taken through the facet wall of the cylinder or from a hoop which has been heat taken care of While using the completed cylinders of which the specimens should be agent. The axis of the specimens have to be parallel on the axis on the cylinder.
All spun cylinders and plugged cylinders needs to be examined for click here leakage by gas or air force right after The underside has actually been cleaned and is particularly free from all dampness issue to the following circumstances and limitations:
Cylinders have to be created using products and processes ample to make certain Every single cylinder manufactured conforms to the requirements of the subpart. No defect is permitted that is probably going to weaken the concluded cylinder appreciably.
Cylinders should be created by ideal appliances and approaches. No defect is permitted that is likely to weaken the concluded cylinder appreciably. A reasonably smooth and uniform area end is required. The thickness of your spun bottom is, under no affliction, to get below two instances the minimal wall thickness of your cylindrical shell; these types of bottom thickness must be measured within just a place bounded by a line representing the factors of Call in between the cylinder and floor once the cylinder is in the vertical posture.
(ii) In utilizing the “extension beneath load” technique, the total strain (or “extension less than load”) equivalent to the anxiety at which the 0.2 percent permanent pressure takes place may very well be decided with sufficient accuracy by calculating the elastic extension of your gauge size under correct load and including thereto 0.
(1) The outcomes in the examination have to conform to at the least the bare minimum satisfactory mechanical home restrictions for aluminum alloys as specified in paragraph (b) of this part.