5 Simple Techniques For bar 178
5 Simple Techniques For bar 178
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Reheat treatment is approved for turned down cylinders. Subsequent thereto, cylinders will have to move all prescribed exams to generally be appropriate. Fix by welding isn't authorized.
(four) As a security precaution, If your maker elects to make this test before the hydrostatic exam, the manufacturer ought to style and design the check apparatus so which the stress is applied to the smallest location practicable, round the position of closure, and so as to use the smallest possible quantity of air or gasoline.
(3) A plugged cylinder is one where a permanent closure in the bottom of the finished cylinder continues to be effected by a plug.
A root bend examination specimen has to be removed from the cylinder or welded test plate which was useful for the tensile take a look at laid out in paragraph (l)(1) of this part. The specimen needs to be taken from over the circumferential seam and need to be prepared and examined in conformance with and need to meet the necessities of CGA C-three.
Cylinders needs to be created by ideal appliances and procedures. No defect is permitted that is likely to weaken the completed cylinder appreciably. A fairly sleek and uniform floor end is required. The thickness of your spun bottom is, beneath no ailment, to get a lot less than two situations the minimal wall thickness of the cylindrical shell; this sort of base thickness must be calculated inside of a place bounded by a line representing the factors of Get in touch with amongst the cylinder and ground in the event the cylinder is inside a vertical situation.
Just one finished cylinder chosen at random out of every lot of 500 or fewer successively generated has to be hydrostatically analyzed to four
(b) Just about every these 25,000 containers or considerably less, successively manufactured every day, shall constitute a whole lot and In the event the check container shall fall short, the lot shall be turned down or ten supplemental containers may be selected at random and subjected on the examination underneath which failure happened.
Reheat remedy of rejected cylinders is authorized. Subsequent thereto, cylinders will have to go all prescribed assessments being acceptable. Maintenance by welding is approved.
(1) Marking on Just about every cylinder needs to be stamped plainly and permanently on or near the shoulder, top head, neck or valve security collar that read more is completely hooked up to the cylinder and forming integral component thereof.
All spun cylinders and plugged cylinders have to be analyzed for leakage by dry fuel or dry air stress right after the bottom has long been cleaned and it is totally free from all moisture, topic to the next disorders and constraints:
(i) The phrase “spun” or “plug” has to be positioned close to the DOT specification marking when an end closure in the concluded cylinder has been welded from the spinning method, or effected by plugging.
(1) Stress, around the same as but no below provider stress, has to be placed on a person side with the finished base over a region of at the very least 1⁄16 of the whole region of The underside but not below 3⁄four inch in diameter, such as the closure, for at least one moment, throughout which time one other aspect of The underside exposed to tension has to be coated with drinking water and carefully examined for indications of leakage. Apart from as provided in paragraph (n) of the section, a cylinder that is certainly leaking must be turned down.
Ends: The finishes shall be made to resist tension as well as container Geared up having a tension reduction technique (e.g., rim-venting release or a dome expansion machine) built to buckle before the burst in the container.
This section prescribes the manufacturing and tests technical specs for packaging and containers employed for the transportation of dangerous elements in commerce.