(ii) Taper threads have to be of the size not less than as specified for American Common taper pipe threads.
(iv) Long-lasting volumetric enlargement might not exceed ten % of the entire volumetric expansion at take a look at stress.
Marking on Every container by stamping plainly and forever are only authorized where the steel is a minimum of 0.09 inch thick, or on the metal nameplate forever secured on the container by usually means in addition to smooth solder, or by implies that could not lessen the wall thickness.
(ii) In utilizing the “extension below load” strategy, the total strain (or “extension less than load”), comparable to the worry at which the 0.2-% lasting strain happens might be identified with adequate accuracy by calculating the elastic extension in the gauge size underneath ideal load and adding thereto 0.
Reheat cure of rejected cylinders is licensed. Subsequent thereto, cylinders will have to move all prescribed exams to get satisfactory. Repair service by welding or spinning is not authorized.
This test can be used and must be as necessary by CGA C-3. The specimen should be bent until finally the elongation on the outer surface area, adjacent to the basis with the weld, concerning the evenly scribed gage traces a to b, have to be not less than twenty %, except this share may very well be diminished for steels using a tensile power in excessive of fifty,000 psig, as presented in paragraph (k) of the part.
Every cylinder should be uniformly and effectively heat addressed, ahead of checks, by any appropriate technique in extra of 1100 °F. Heat procedure must be attained In any case forming and welding operations, besides that when brazed joints are utilised, warmth cure ought to comply with any forming and welding operations but might be done just before, for the duration of, or following the brazing functions. Liquid quenching will not be approved.
Reheat remedy of rejected cylinders is approved. Subsequent thereto, cylinders must pass all prescribed tests to become suitable. Restore by welding is approved.
(ii) In using the “extension under load” method, the overall pressure (or “extension below load”), equivalent to the pressure at which the 0.two % long-lasting strain happens may be decided with enough accuracy by calculating the elastic extension in the gauge size underneath ideal load and adding thereto 0.
A “root” bend test specimen must be cut from the cylinder or welded take a look at plate, useful for the tensile examination specified in paragraph (l)(one) of this part and from almost every other seam or equal welded examination plate if the seam is welded by a technique various from that useful for the key seam.
(1) Pressure, close to the same as but no fewer than assistance stress, have to be placed on one particular side of the completed bottom around a place of a minimum of one⁄16 of the overall spot of The underside but not below three⁄4 inch read more in diameter, such as the closure, for at least a single minute, in the course of which era another side of the bottom subjected to strain need to be coated with water and intently examined for indications of leakage.
(3) A plugged cylinder is just one wherein a long term closure in The underside of the completed cylinder is effected by a plug.
(ii) Taper threads have to be of the duration not below that specified for American Normal taper pipe threads.
(6) Other markings are licensed presented They're produced in low stress places apart from the side wall and so are not of the dimension and depth that will make destructive tension concentrations. Such marks may well not conflict with any DOT expected markings.