bar178 No Further a Mystery
bar178 No Further a Mystery
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(iii) When dimension of your cylinder isn't going to allow securing straight specimens, the specimens could be taken in almost any spot or direction and will be straightened or flattened chilly by pressure only, not by blows.
(two) Heat treatment isn't essential following the welding or brazing of weldable low carbon elements to attachments of comparable materials that have been Formerly welded or brazed to the very best or base of cylinders and effectively heat dealt with, provided these subsequent welding or brazing doesn't deliver a temperature in extra of four hundred °File in any Component of the top or base product.
Cylinders have to be manufactured utilizing equipment and processes enough in order that Each and every cylinder made conforms to the requirements of the subpart also to the subsequent needs:
Markings could possibly be stamped in to the sidewalls of cylinders using a provider force of one hundred fifty psig if all of the following problems are satisfied:
Cylinders have to be made making use of devices and procedures satisfactory to ensure that Every cylinder made conforms to the requirements of this subpart.
(five) All cylinders, if drinking water quenched or quenched with a liquid manufacturing a cooling amount in extra of 80 per cent in the cooling rate of drinking water, has to be inspected through the magnetic particle or dye penetrant method to detect the presence of quenching cracks. Any cylinder located to have a quench crack should be rejected and might not be requalified.
This take a look at might be utilised and have to be as necessary by CGA C-3. The specimen must be bent right until the elongation at the outer surface, adjacent to the basis of the weld, in between the evenly scribed gage strains a to b, has to be not less than 20 percent, apart from this proportion may very well be lowered for steels possessing a tensile toughness in excess of fifty,000 psig, as delivered in paragraph (k) of this part.
Cylinders needs to be manufactured employing gear and processes ample to make sure that Every single cylinder generated conforms to the necessities of this subpart.
(iii) The bare minimum examination pressure must be taken care of not less than 30 seconds and adequately for a longer time to guarantee finish growth. Any interior pressure applied right after warmth-cure and prior to the Formal check may not exceed 90 p.c with the take a look at stress.
(two) All features done by, or on behalf of, the individual whose title or image appears as Portion of the marking conform to requirements specified in this part.
Content must be discovered by any ideal system other than that plates and billets for hot-drawn cylinders should be marked with the read more heat number.
Welding or brazing of any attachment or opening to the heads of cylinders is permitted delivered the carbon articles from the steel isn't going to exceed 0.25 p.c other than in the case of 4130 × steel, which can be applied with proper welding procedure.
(i) A gauge duration of at least 24 moments the thickness using a width not in excess of 6 periods the thickness. The specimen, distinctive of grip finishes, is probably not flattened. Grip finishes might be flattened to inside just one inch of every finish on the decreased section. When dimension of cylinder would not permit securing straight specimens, the specimens may be taken in almost any locale or path and could be straightened or flattened chilly by tension only, not by blows.
Cylinders need to be manufactured using products and processes ample to make sure that Every cylinder created conforms to the necessities of this subpart and the next: