(ii) Taper threads to be of duration not fewer than as specified for American Typical taper pipe threads.
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All spun cylinders and plugged cylinders must be tested for leakage by fuel or air strain soon after The underside continues to be cleaned and it is no cost from all dampness, subject to the next ailments:
(three) A plugged cylinder is a single by which a long-lasting closure in the bottom of the concluded cylinder has become effected by a plug.
(one) For spheres the examination needs to be on the weld among parallel metal plates over a press with welded seam at ideal angles into the plates.
A root bend test specimen should be faraway from the cylinder or welded take a look at plate utilized for the tensile exam laid out in paragraph (m)(1) of this part. Specimens should be taken from throughout the longitudinal seam and should be ready and examined in conformance with the requirements of CGA C-three.
Notwithstanding the variation provided Within this paragraph, Every container will have to in any other case conform to your DOT 2Q container in accordance with § 178.33a. The next disorders also apply under Variation one—
(ii) Taper threads to generally be of duration not a lot less than as specified for American Regular taper pipe threads.
(one) Each pressure specimen will need to have a gauge length of two inches which has a width not exceeding one particular and a single-50 % inches. Aside from the grip ends, the specimen may not be flattened. The grip ends may be flattened to within just one inch of each conclude of the minimized portion.
(i) The remaining cylinders in Every whole lot has to be strain examined from the proof force, drinking water-jacket or immediate expansion test strategy as prescribed in CGA C-1. The minimum amount test tension have to check here be taken care of for the particular timeframe and also the screening gear has to be calibrated as prescribed in CGA C-one.
(3) For filling that's molded and dried prior to insertion in cylinders, porosity test may be built on a sample block taken at random from product to be used.
Cylinders needs to be produced making use of gear and procedures satisfactory in order that Just about every cylinder made conforms to the necessities of the subpart. No defect is permitted that is probably going to weaken the completed cylinder appreciably. A reasonably smooth and uniform surface complete is necessary. Heads may be attached to shells by lap brazing or might be fashioned integrally.
(iv) Long term volumetric expansion may well not exceed ten percent of the entire volumetric enlargement at exam force.
1 container taken at random away from 200 or fewer has to be hydrostatically analyzed to destruction. Rupture strain must be involved as part of the inspector's report.