Specimens taken across the circumferentially welded seam must be Reduce from just one cylinder taken at random from Every single large amount of two hundred or much less cylinders immediately after heat remedy and will have to move satisfactorily the subsequent exams:
(one) Openings are permitted in heads only. They must be round and could not exceed three inches in diameter or a person 3rd on the cylinder diameter, whichever is fewer. Every opening within the cylinder should be supplied having a fitting, boss or pad, possibly integral with, or securely hooked up to, the cylinder overall body by fusion welding.
(iii) For the objective of pressure measurement, the Preliminary pressure has to be set although the specimen is under a anxiety of twelve,000 psi as well as strain indicator reading staying set for the calculated corresponding strain.
(four) In the event the cylinder surface area is not really originally cost-free from your defects, the surface may be machined or or else handled to eradicate these defects presented the minimum amount wall thickness is preserved.
Markings on Every cylinder must be by stamping plainly and forever on shoulder, top rated head, neck or valve safety collar that's permanently hooked up to the cylinders and forming an integral part thereof, delivered that cylinders not fewer than 0.090 inch thick may very well be stamped to the facet wall adjacent to best head.
(1) Every single opening from the container have to be presented with a fitting, manager or pad of weldable stainless steel securely attached into the container by fusion welding.
Designations and limiting chemical compositions of steel authorized by this specification must be as revealed in desk 1 in paragraph (o) of the section.
(ii) In using the “extension underneath load” technique, the entire strain (or “extension less than load”), equivalent to the strain at which the 0.two percent long lasting strain occurs could possibly be decided with ample precision by calculating the elastic extension of the gauge length under suitable load and including thereto 0.
(two) All attachments to your sidewalls and heads on the cylinder needs to be by fusion welding and need to be of a weldable substance complying with the effects needs of paragraph (l) of this portion.
(ii) The filling material has to be uniform in good quality and freed from voids, except that a effectively drilled into the filling substance beneath the valve is licensed In the event the effectively is stuffed with a cloth of this kind of sort that the functions of your filling materials are usually not impaired;
(two) A spun cylinder is one by which an conclusion closure in the finished cylinder continues to be welded because of the spinning system.
(i) If the selected cylinder passes the h2o-jacket or direct expansion check, the remaining cylinders in Just about every whole lot needs to be tension analyzed with the proof stress h2o-jacket or direct expansion take a look at strategy as prescribed in CGA C-1.
(1) Circumferential seams website need to be by brazing only. Heads has to be hooked up to shells through the lap brazing approach and have to overlap not below 4 times the wall thickness. Brazing product should have a melting level of not lower than a thousand °F.
(iv) Permanent volumetric enlargement may not exceed ten per cent of the full volumetric growth at examination stress.