Reheat procedure is licensed for turned down cylinders. Subsequent thereto, cylinders must pass all prescribed exams to get suitable. Repair service by welding or spinning is not really authorized.
(1) Each cylinder should be uniformly and effectively warmth dealt with previous to exam by the applicable approach proven in table 1 of appendix A to this component. Heat therapy should be accomplished All things considered forming and welding functions, besides that when brazed joints are employed, heat treatment method need to stick to any forming and welding operations, but may be done prior to, in the course of or after the brazing functions (see paragraph (m) of this section for weld repairs).
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A root bend exam specimen has to be faraway from the cylinder or welded examination plate that was employed for the tensile check laid out in paragraph (l)(1) of the area. The specimen needs to be taken from over the circumferential seam and should be organized and examined in conformance with and will have to satisfy the necessities of CGA C-3.
(ii) In utilizing the “extension under load” approach, the entire strain (or “extension beneath load”) corresponding to the anxiety at which the 0.2 percent permanent pressure happens could be established with sufficient accuracy by calculating the elastic extension of the gauge duration less than suitable load and introducing thereto 0.
(2) If an indication with the title of the manufacturer or other identification on the packaging as specified via the capable authority is required, the name and handle or symbol of the manufacturer or the approval company certifying compliance Using the UN standard should be entered. Symbols, if employed, has to be registered with the Associate Administrator.
Each individual cylinder needs to be uniformly and thoroughly heat dealt with, just before assessments, by any appropriate system in surplus of 1100 °File. Heat cure must be achieved All things considered forming and welding operations, except that when brazed joints are utilised, warmth treatment method should observe any forming and welding operations but could possibly be completed in advance of, all through, or after the brazing functions. Liquid quenching will not be licensed.
(iii) When measurement from the cylinder won't permit securing straight specimens, the specimens could possibly be taken in any place or path and will be straightened or flattened cold by pressure only, not by blows.
Along with the requirements of § 178.35, the inspector's report to the physical examination report, must suggest the normal worth for three specimens along with the least worth for one particular specimen for each great deal selection.
(i) The remaining cylinders in Just about every great deal have to be strain analyzed from the proof stress, h2o-jacket or direct enlargement examination process as prescribed in CGA C-1. The minimal check pressure must be taken care of for the precise timeframe along with the tests gear has to be calibrated as prescribed in CGA C-1.
Reheat cure is approved for turned down cylinders. Subsequent thereto, cylinders will have to move all prescribed checks to generally be acceptable. Restore by welding or spinning isn't authorized.
S = Mc/I (iii) To work out the most longitudinal tensile worry as a result of hydrostatic test pressure, the subsequent formula have to website be applied:
(1) Welding or brazing is authorized to the attachment of neckrings and footrings that are non-strain components, and only towards the tops and bottoms of cylinders having a company pressure of five hundred psig or fewer.
Be aware one: This designation might not be restrictive and the commercial metal is limited in analysis as proven With this table.