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(iii) When dimensions of the cylinder won't allow securing straight specimens, the specimens can be taken in almost any site or path and could be straightened or flattened cold by force only, not by blows.

Previous to any take a look at, all cylinders should be subjected to an answer warmth treatment method and ageing therapy appropriate for the aluminum alloy employed.

(ii) In utilizing the “extension under load” process, the overall pressure (or “extension beneath load”), comparable to the anxiety at which the 0.2 percent permanent strain happens can be determined with ample precision by calculating the elastic growth on the gauge size under ideal load and incorporating thereto 0.

One particular cylinder taken at random out of every large amount of two hundred or considerably less, have to be subjected to the flattening take a look at as follows:

Repair service of welded seams by welding before method procedure is authorized. Subsequent thereto, containers has to be warmth addressed and go all prescribed exams.

Cylinder heads, bodies or the completed cylinder, shaped by drawing or urgent, has to be uniformly and thoroughly warmth treated by an applicable method proven in table one of appendix A of this part right before tests.

(ii) In using the “extension underneath load” approach, the whole strain (or “extension below load”), equivalent to the stress at which the 0.two % permanent pressure occurs may very well be determined with sufficient accuracy by calculating the elastic extension from the gauge duration under correct load and introducing thereto 0.

(iv) A brass fitting may very well be brazed into the steel boss or flange on cylinders used as part areas of handheld hearth extinguishers.

(3) At no cost standing cylinders, the base thickness need to be at the very least two times the bare minimum wall thickness alongside the road of Get hold of involving the cylinder foundation and the floor in the event the cylinders are inside the vertical placement.

(one) Every single cylinder has to be heated and held at the proper temperature for a minimum of 1 hour for each inch of thickness depending on the maximum thickness from the cylinder and after that quenched in an appropriate liquid medium getting a cooling price not in excess of eighty % of h2o.

(iii) On a cylindrical part of the shell that extends further than the recessed bottom with here the cylinder constituting an integral and non-stress Element of the cylinder.

There need to be no evidence of cracking with the sample when it is actually flattened in between flat plates to not more than six (six) moments the wall thickness. If this take a look at fails, one particular further sample from your exact same ton may very well be taken. If this next sample fails, all the lot need to be turned down.

(ii) In using the “extension under load” method, the entire strain (or “extension beneath load”) akin to the stress at which the 0.2 % long-lasting pressure occurs may be decided with ample accuracy by calculating the elastic extension on the gauge duration less than suitable load and introducing thereto 0.

Inspection must be done on the inside of every container prior to closing and externally on Each and every completed container soon after warmth treatment method.