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(6) Intermediate manganese steels can be tempered at temperatures not under 1150 °F., and just after heat dealing with Every single cylinder must be submitted to a magnetic exam to detect the presence of quenching cracks. Cracked cylinders have to be turned down and wrecked.
(4) As a security precaution, If your company elects for making this examination before the hydrostatic test, the maker ought to design the exam apparatus so the strain is placed on the smallest spot practicable, around the place of closure, and to be able to use the smallest possible quantity of air or gas.
Reheat procedure of turned down cylinders is licensed. Subsequent thereto, cylinders must go all prescribed checks to get suitable. Repair service of welded seams by welding is approved.
Notwithstanding the variation furnished In this particular paragraph, Each and every container must in any other case conform to your DOT 2Q container in accordance with § 178.33a. The next ailments also implement under Variation 2—
(i) The remaining cylinders in Just about every great deal need to be analyzed through the proof stress water-jacket or direct enlargement exam strategy as prescribed in CGA C-1. The minimal test tension needs to be maintained for the particular timeframe as well as the testing devices have to be calibrated as prescribed in CGA C-one.
1 container taken at random from 200 or significantly less has to be hydrostatically examined to destruction. The rupture strain need to be bundled as part of the inspector's report.
(ii) Taper threads to generally be of duration not below as specified for American Regular taper pipe threads.
This exam may be made use of and needs to be as needed by CGA Pamphlet C-three. The specimen have to be bent right until the elongation within the outer floor, adjacent to the basis of the weld, concerning the evenly scribed gage strains-a to b, is no less than twenty per cent, besides that this proportion could be reduced for steels getting a tensile power in extra of 50,000 psi, as presented in paragraph (k) of this portion.
(2) Every opening in a spherical sort cylinder should be furnished more info using a fitting, manager, or pad of weldable metal securely hooked up to the container by fusion welding.
Cylinders with bottoms shut in by spinning need to be leakage analyzed by setting the inside air or fuel force at not under the support force. Any cylinder that leaks needs to be turned down.
Cylinder heads, bodies or the finished cylinder, formed by drawing or pressing, must be uniformly and properly warmth taken care of by an relevant approach demonstrated in desk one of appendix A of this portion right before exams.
Cylinders needs to be produced using machines and procedures adequate making sure that Every cylinder created conforms to the necessities of the subpart. No defect is appropriate that is probably going to weaken the concluded cylinder appreciably.
(iv) Long term volumetric growth may well not exceed 10 % of the overall volumetric enlargement at check force.