The attachment into the tops and bottoms only of cylinders by welding of neckrings, footrings, handles, bosses, pads and valve safety rings is authorized delivered that these kinds of attachments and also the portion of the container to which They are really hooked up are made of weldable metal, the carbon information of which can not exceed 0.25 %.

(ii) In using the “extension less than load” process, the entire pressure (or “extension beneath load”) equivalent to the stress at which the 0.2 % permanent strain takes place could possibly be determined with enough precision by calculating the elastic extension on the gauge duration beneath ideal load and incorporating thereto 0.

(one) A stress, around the same as although not below the provider pressure, needs to be applied to one particular facet from the completed bottom above a place of at least 1⁄16 of the entire location of the bottom although not less than 3⁄four inch in diameter, such as the closure, for a minimum of a person moment, for the duration of which time one other facet of the bottom exposed to strain has to be lined with drinking water and carefully examined for indications of leakage.

(iii) Straight threads must have not less than 4 engaged threads, limited in good shape and calculated shear energy at the least ten periods the examination strain of your cylinder. Gaskets, which prevent leakage and are inert towards the hazardous product, are expected.

A specimen should be removed from a person cylinder of each and every lots of two hundred or less, or welded exam plate. The welded take a look at plate have to be of among the list of heats during the number of 200 or much less which it signifies, in precisely the same affliction and around exactly the same thickness because the cylinder wall except that in no circumstance will have to it be of the lesser thickness than that needed for a quarter measurement Charpy influence specimen. The weld should be created by the same methods and subjected to precisely the same warmth cure as the key weld over the cylinder.

(iv) Long term volumetric enlargement might not exceed ten % of the entire volumetric growth at examination pressure.

Reheat remedy of rejected cylinders is authorized. Subsequent thereto, cylinders should go all prescribed tests being appropriate. Welds may be fixed by suited methods of fusion welding.

Reheat cure of turned down cylinders is approved. Subsequent thereto, cylinders ought to go all prescribed tests to become satisfactory. Mend by welding is approved.

Observe one: This designation is probably not restrictive as well as business steel is restricted in analysis as shown With this table.

(i) The remaining cylinders in Each and every large amount need to be analyzed via the evidence stress water-jacket or immediate growth check process as prescribed in CGA C-1. The minimum test force should be managed for the particular timeframe and also the tests products needs to be calibrated as prescribed in CGA C-1.

(iii) The minimum amount take a look at tension need to be taken care of not less than 30 seconds and sufficiently lengthier to ensure comprehensive enlargement. Any interior tension applied following warmth-treatment method and before the official test may well not exceed 90 % with the exam force.

(two) here A spun cylinder is a person by which an stop closure inside the concluded cylinder continues to be welded through the spinning method.

Exactly where: S = Tensile pressure in psi; A1 = Inside place in cross portion of cylinder in sq. inches; P = Hydrostatic test tension-psig; A2 = Place of steel in cross section of cylinder in sq. inches.

(one) The results in the examination ought to conform to at least the minimal satisfactory mechanical house boundaries for aluminum alloys as specified in paragraph (b) of this part.