Reheat procedure is approved for turned down cylinders. On the other hand, Each and every reheat treated cylinder will have to subsequently move all the prescribed assessments. Restore by welding is not really approved.
A Bodily take a look at must be performed to find out generate toughness, tensile strength, elongation, and reduction of location of fabric as follows:
(iv) On a steel plate connected to the best from the cylinder or everlasting section thereof; adequate Place needs to be left around the plate to offer for stamping not less than six retest dates; the plate has to be no less than one⁄16-inch thick and should be connected by welding, or by brazing.
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(three) For filling that's molded and dried in advance of insertion in cylinders, porosity check can be produced on sample block taken at random from substance to be used.
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This test could be applied and needs to be as required by CGA C-three. The specimen has to be bent right until the elongation within the outer surface, adjacent to the root of the weld, concerning the frivolously scribed gage traces a to b, must be at the very least 20 %, other than that this percentage could be lessened for steels getting a tensile strength in excess of 50,000 psig, as offered in paragraph (k) of this section.
All spun cylinders and plugged cylinders must be examined for leakage by fuel or air pressure immediately after The underside is cleaned and is particularly free from all dampness, topic to the subsequent situations and limits:
Just about every cylinder must be uniformly and effectively heat taken care of, before checks, by any acceptable approach in excessive of 1100 °File. Warmth therapy need to be completed In spite of everything forming and welding functions, besides that when brazed joints are utilized, heat treatment must abide by any forming and welding functions but may very well be done before, all more info through, or once the brazing operations. Liquid quenching just isn't approved.
A root bend take a look at specimen must be faraway from the cylinder or welded take a look at plate employed for the tensile take a look at laid out in paragraph (m)(1) of this portion. Specimens needs to be taken from over the longitudinal seam and have to be geared up and tested in conformance with the necessities of CGA C-3.
Markings on Every container need to be stamped plainly and forever on a everlasting attachment or with a metal nameplate completely secured to the container by signifies in addition to gentle solder.
Every cylinder, just before insulating and jacketing, need to productively face up to a strain examination as follows:
(iii) On the cylindrical part of the shell that extends over and above the recessed bottom in the cylinder, constituting an integral and non-stress A part of the cylinder;
S = PD / 4tE Wherever: S = wall worry in lbs psi; P = examination force prescribed for water jacket exam, i.e., at the least 2 periods company pressure, in psig; D = outdoors diameter in inches; t = bare minimum wall thickness in inches; E = 0.