(1) No defect is permitted that is likely to weaken the concluded cylinder appreciably. A reasonably easy and uniform surface area finish is required. The shell part need to be a fairly real cylinder.
(ii) Verifying the prescribed minimum amount thickness was fulfilled by measuring or witnessing the measurement of the wall thickness; and
A root bend take a look at specimen should be Lower in the cylinder or welded take a look at plate, utilized for the tensile test specified in paragraph (n)(one) of this portion. Specimens need to be well prepared and tested in accordance with and ought to meet the requirements of CGA Pamphlet C-three.
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Longitudinal seams need to be a cast lap joint style and design. When brazed, the plate edge needs to be lapped at the very least 8 (8) occasions the thickness in the plate, laps being held in situation, substantially metal to metallic, by riveting or electric place-welding; brazing must be performed by making use of a suitable flux and by putting brazing materials on just one aspect of seam and implementing heat until this product exhibits uniformly alongside the seam of the other facet.
Content have to be determined by any suited method other than that plates and billets for hotdrawn cylinders must be marked with the heat variety.
(iv) Long term volumetric growth may not exceed 10 % of the full volumetric growth at examination pressure.
(B) With information specifying the kind(s) and Proportions from the closures, including gaskets and some other parts essential in order that the packaging is capable of properly passing the applicable efficiency assessments. This information and facts should include things like any methods to generally be adopted, together read more with closure Recommendations for interior packagings and receptacles, to efficiently assemble and shut the packaging for the goal of stopping leakage in transportation.
Specimens taken through the circumferentially welded seam need to be Slash from a person cylinder taken at random from Each individual wide range of 200 or significantly less cylinders after warmth procedure and have to move satisfactorily the following exams:
(one) Every single cylinder needs to be heated and held at the correct temperature for a minimum of a single hour for every inch of thickness according to the most thickness of the cylinder then quenched in an acceptable liquid medium aquiring a cooling amount not in surplus of eighty p.c of h2o.
(iv) A brass fitting can be brazed on the metal manager or flange on cylinders employed as component parts of handheld fireplace extinguishers.
(ii) In utilizing the “extension underneath load” technique, the total pressure (or “extension below load”) corresponding to the tension at which the 0.2 per cent lasting pressure takes place could be established with enough precision by calculating the elastic extension from the gauge length below ideal load and introducing thereto 0.
(seven) Besides as in any other case provided in paragraph (g)(six) of the part, all cylinders, if water quenched or quenched which has a liquid manufacturing a cooling charge in excessive of eighty % of the cooling amount of water, needs to be inspected via the magnetic particle, dye penetrant or ultrasonic approach to detect the presence of quenching cracks. Any cylinder built to the requirements for specification 3AA and found to possess a quenching crack need to be rejected and might not be requalified.
(4) As a safety precaution, When the maker elects to make this examination ahead of the hydrostatic exam, the manufacturer shall design and style the take a look at equipment so which the pressure is placed on the smallest region practicable, throughout the position of closure, and to be able to make use of the smallest doable quantity of air or gasoline.