The attachment to your tops and bottoms only of cylinders by welding of neckrings, footrings, handles, bosses, pads and valve defense rings is approved furnished that these kinds of attachments plus the part of the container to which They may be hooked up are made of weldable steel, the carbon content material of which may not exceed 0.25 per cent.
(i) Executing or witnessing the overall performance with the chemical analyses on Each and every soften or Solid great deal or other device of starting off product; or
Welding or brazing of any attachment or opening to the heads of cylinders is permitted supplied the carbon articles with the steel will not exceed 0.twenty five percent besides in the case of 4130 × steel, which may be applied with right welding treatment.
(4) In the event the cylinder floor will not be at first absolutely free from the defects, the floor could be machined or in any other case addressed to do away with these defects delivered the bare minimum wall thickness is maintained.
Each cylinder must be uniformly and thoroughly heat dealt with ahead of checks. Any suitable warmth procedure in extra of 1100 °File is approved apart from that liquid quenching is just not permitted. Heat therapy has to be attained In any case forming and welding operations.
(iii) The least exam pressure must be taken care of at the very least thirty seconds and sufficiently more time to make sure finish growth. Any inner stress utilized following heat-remedy and previous to the Formal examination may not exceed ninety p.c from the test strain.
(i) The remaining cylinders in each ton has to be examined via the proof strain, drinking water-jacket, or direct expansion check process as prescribed in CGA C-1. The least take a look at pressure needs to be preserved for the precise timeframe as well as screening products needs to be calibrated as prescribed in CGA C-1.
Reheat procedure of turned down cylinders is approved. Subsequent thereto, cylinders have to move all prescribed exams to get satisfactory. Fix by welding is licensed.
A specimen must be removed from one particular cylinder of every wide range of 200 or much less, or welded take a look at plate. The welded take a look at plate needs to be of among the heats within the great deal of 200 or much less which it represents, in the identical affliction and about exactly the same thickness since the cylinder wall except that in no circumstance must it be website of the lesser thickness than that demanded for a quarter dimension Charpy affect specimen. The weld need to be produced by the identical procedures and subjected to precisely the same heat treatment method as the key weld to the cylinder.
A “root” bend check specimen should be Lower from your cylinder or welded test plate, useful for the tensile examination laid out in paragraph (l)(1) of this segment and from any other seam or equal welded check plate if the seam is welded by a method distinct from that utilized for the major seam.
S = PD / 4tE Wherever: S = Wall worry in psi; P = Check tension prescribed for drinking water jacket test, i.e., no less than two instances service stress, in psig; D = Outside diameter in inches; t = Least wall thickness in inches; E = 0.
(iii) On a cylindrical part of the shell that extends beyond the recessed base on the cylinder constituting an integral and non-force A part of the cylinder.
Two exam specimens Slice from a single cylinder symbolizing Each and every large amount of two hundred cylinders or significantly less must be subjected to your mechanical Qualities exam, as follows:
(iv) A brass fitting might be brazed to the steel boss or flange on cylinders applied as component areas of handheld fireplace extinguishers.