All spun cylinders and plugged cylinders should be analyzed for leakage by dry fuel or dry air strain soon after the bottom has been cleaned and is particularly no cost from all humidity, subject matter to the subsequent situations and restrictions:
(iii) When dimensions on the cylinder will not allow securing straight specimens, the specimens could be taken in any site or course and could be straightened or flattened cold, by strain only, not by blows.
Reheat treatment method is approved for turned down cylinders. Subsequent thereto, cylinders must pass all prescribed exams being satisfactory. Mend by welding or spinning just isn't licensed.
(i) The remaining cylinders within the good deal have to be examined via the proof pressure, drinking water-jacket, or direct enlargement test technique as prescribed in CGA C-one. The least take a look at strain need to be managed for the specific timeframe and also the testing machines need to be calibrated as prescribed in CGA C-1.
(one) Specimens should be taken from just one cylinder immediately after heat treatment as illustrated in appendix A to this subpart, decided on at random from Every large amount of 200 or less, as follows:
(iii) Permanent volumetric enlargement might not exceed 10 percent of complete volumetric expansion at check tension.
This take a look at may very well be utilised and must be as needed by CGA C-three. The specimen must be bent until the elongation at the outer surface area, adjacent to the basis of the weld, involving the lightly scribed gage lines a to b, should be at the least twenty %, apart from that this proportion might be decreased for steels having a tensile energy in extra of 50,000 psig, as furnished in paragraph (k) of this portion.
Reheat remedy is licensed to get a turned down cylinder in accordance with this particular paragraph (n). After reheat remedy, a cylinder must move all prescribed checks Within this segment to become considered acceptable. Repair of brazed seams by brazing and welded seams by welding is licensed.
A person container taken at random from two hundred or much less have to be hydrostatically tested to destruction. Rupture tension must be involved as part of the inspector's report.
All spun cylinders and plugged cylinders needs to be examined for leakage by fuel or air stress just after The underside has become cleaned and is particularly totally free from all dampness matter to the subsequent conditions and limitations:
(one) Tension, around similar to but no less than support stress, have to be placed on a single aspect of the finished bottom about a location of at the least one⁄16 of the overall area of the bottom although not less than three⁄four inch in diameter, including the closure, for at least one minute, all through which period the opposite side of The underside exposed to stress has to be lined with water and intently examined for indications of leakage. Besides as offered in paragraph (n) of the segment, a cylinder that is definitely leaking has to be rejected.
Before the Original shipment of any particular cylinder structure, cyclic read more pressurization tests need to have been done on a minimum of 3 representative samples with no failure as follows:
Material need to be recognized by any acceptable approach. Metal stamping of heat identifications will not be produced in almost any region that may ultimately develop into the side wall in the cylinder. Depth of stamping may well not encroach upon the bare minimum prescribed wall thickness of your cylinder.
S = PD / 4tE Where by: S = wall pressure in lbs . psi; P = test stress prescribed for drinking water jacket examination, i.e., not less than two occasions support force, in psig; D = outside the house diameter in inches; t = minimum wall thickness in inches; E = 0.