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(i) The remaining cylinders in Each individual great deal have to be examined from the evidence strain, water-jacket, or immediate enlargement examination process as prescribed in CGA C-1. The minimum exam stress have to be maintained for the specific timeframe as well as the tests equipment need to be calibrated as prescribed in CGA C-1.

(two) Every opening inside a spherical sort of cylinder needs to be delivered using a fitting, boss, or pad of weldable steel securely attached on the cylinder by fusion welding.

(3) When Every cylinder is examined to the minimum amount take a look at pressure, the minimal check tension has to be taken care of not less than 30 seconds and adequately more time to make sure full growth. Any interior force applied right after warmth-procedure and previous into the Formal take a look at may not exceed ninety % with the take a look at tension.

This test could be utilized and should be as required by CGA C-three. The specimen needs to be bent right until the elongation for the outer surface area, adjacent to the root in the weld, among the lightly scribed gauge strains a to b, have to be no less than twenty per cent, other than that this proportion may be lowered for steels having a tensile strength in excessive of fifty,000 psig, as furnished in paragraph (k) of the segment.

(i) The term “spun” or “plug” have to be placed near the DOT specification marking when an stop closure within the concluded cylinder has long been welded with the spinning course of action, or effected by plugging.

(iii) Long-lasting volumetric growth may well not exceed ten percent of total volumetric growth at check pressure.

This test could be made use of and must be as essential by CGA C-three. The specimen must be bent until finally the elongation on the outer floor, adjacent to the basis from the weld, amongst the evenly scribed gage strains a to b, have to be not less than 20 percent, except this percentage can be diminished for steels having a tensile toughness in surplus of fifty,000 psig, as presented in paragraph (k) of the portion.

(1) Every single cylinder should be uniformly and effectively warmth handled previous to test through the applicable process referenced in table one of appendix A to this section. Warmth procedure need get more info to be completed In any case forming and welding functions, besides that when brazed joints are applied, heat procedure should adhere to any forming and welding operations, but might be done before, throughout or following the brazing functions (see paragraph (n) of the section for weld repairs).

(iii) Straight threads owning not less than 4 engaged threads, to have limited fit and calculated shear power no less than 10 moments the examination strain from the container; gaskets necessary, enough to circumvent leakage.

(i) The remaining cylinders in Every single great deal must be analyzed via the proof strain h2o-jacket or direct expansion exam process as prescribed in CGA C-1. The least exam strain must be taken care of for the particular timeframe and the testing machines must be calibrated as prescribed in CGA C-1.

The least wall thickness in the cylinder have to be this sort of which the calculated wall strain in the minimum amount demanded exam stress may well not exceed the the very least worth of the next:

Cylinders should be produced by ideal appliances and methods. No defect is permitted that is likely to weaken the concluded cylinder appreciably. A fairly clean and uniform area finish is required. The thickness with the spun base is, underneath no issue, to get below two times the bare minimum wall thickness of your cylindrical shell; these kinds of base thickness must be calculated within a region bounded by a line representing the points of Speak to among the cylinder and floor if the cylinder is inside of a vertical posture.

(ii) Taper threads to get of length not fewer than as specified for American Regular taper pipe threads.

(three) As a safety precaution, Should the maker elects to help make this test prior to the hydrostatic examination, the manufacturer should really design and style the test apparatus so which the pressure is applied to the smallest area practicable, throughout the stage of closure, and in order to use the smallest attainable volume of air or fuel.

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