(1) Each and every cylinder have to be heated and held at the right temperature for a minimum of one particular hour for each inch of thickness dependant on the utmost thickness in the cylinder and then quenched in an acceptable liquid medium having a cooling charge not in excessive of 80 per cent of drinking water.
(1) Each and every cylinder need to be uniformly and correctly warmth handled before check via the relevant approach revealed in desk 1 of appendix A to this part. Warmth treatment method need to be attained In the end forming and welding functions, apart from that when brazed joints are used, heat treatment ought to adhere to any forming and welding operations, but may very well be accomplished prior to, during or after the brazing functions (see paragraph (m) of the area for weld repairs).
(iii) For the goal of strain measurement, the Original pressure must be established although the specimen is under a pressure of 12,000 psi along with the strain indicator examining becoming established on the calculated corresponding pressure.
Welding or brazing for almost any objective in anyway is prohibited, except that welding by spinning is permitted to close The underside of spun cylinders. Machining or grinding to create proper area end at issue of closure is necessary.
(4) As a security precaution, In the event the manufacturer elects to create this test before the hydrostatic examination, the manufacturer shall layout the take a look at equipment so that the stress is placed on the smallest space practicable, within the level of closure, and to be able to use the smallest doable quantity of air or fuel.
A root bend check specimen must be removed from the cylinder or welded examination plate utilized for the tensile exam laid out in paragraph (m)(1) of this get more info part. Specimens needs to be taken from over the longitudinal seam and have to be organized and examined in conformance with the necessities of CGA C-3.
The steel used in the construction from the cylinder need to be as laid out in desk one of appendix A to this aspect. The cylinder maker ought to preserve a report of deliberately added alloying aspects.
(i) The remaining cylinders in the good deal needs to be tested because of the proof strain, drinking water-jacket, or direct growth check system as prescribed in CGA C-one. The minimal check pressure need to be preserved for the particular timeframe along with the screening devices need to be calibrated as prescribed in CGA C-one.
(a) By appliances and strategies that will assure uniformity of accomplished containers; Dust and scale to become taken out as vital; no defect satisfactory that is probably going to weaken the completed container appreciably; moderately sleek and uniform surface finish needed.
A specimen should be Slash from one particular cylinder of each and every lots of two hundred or a lot less, or welded test plate. The welded examination plate has to be of among the list of heats from the wide range of two hundred or a lot less which it signifies, in a similar affliction and roughly a similar thickness given that the cylinder wall other than that it is probably not of the lesser thickness than that needed for a quarter sizing Charpy impression specimen. The weld must be created by the identical methods and subjected to the same heat remedy as the most important weld within the cylinder.
(b) A UN typical packaging for which the UN normal is set forth in this portion may very well be marked While using the United Nations image as well as other specification markings provided that it entirely conforms to the requirements of this part.
(iv) A brass fitting may very well be brazed for the metal boss or flange on cylinders applied as ingredient parts of handheld fireplace extinguishers.
Cylinders need to be made applying tools and processes satisfactory to make certain that Each individual cylinder generated conforms to the necessities of this subpart. No defect is suitable that is probably going to weaken the concluded cylinder appreciably.
(iv) A brass fitting might be brazed towards the steel boss or flange on cylinders made use of as ingredient areas of handheld fire extinguishers.