Cylinders should be made employing equipment and processes adequate making sure that Each and every cylinder manufactured conforms to the necessities of this subpart. No defect is permitted that is likely to weaken the completed container appreciably.
Materials should be recognized by any suitable process, apart from that plates and billets For warm-drawn cylinders must be marked with the heat variety.
(1) Just about every opening while in the container needs to be presented with a fitting, manager or pad of weldable stainless-steel securely attached to your container by fusion welding.
(4) All cylinders have to be inspected because of the magnetic particle or dye penetrant process to detect the existence of quenching cracks. Any cylinder observed to possess a quenching crack needs to be rejected and may not be requalified.
(iii) For the objective of pressure measurement, the Preliminary strain should be set although the specimen is less than a stress of 12,000 psi and the strain indicator reading becoming established for the calculated corresponding strain.
(3) Each individual test cylinder must withstand flattening to 9 moments the wall thickness without cracking. In the event the alternate bend examination is utilized, the check specimens ought to remain uncracked when bent inward close to a mandrel within the course of curvature of the cylinder wall until the inside edges are at a length aside not bigger compared to diameter of the mandrel.
This check can be utilised and must be as required by CGA C-three. The specimen need to be bent right up until the elongation within the outer floor, adjacent to the root of the weld, involving the frivolously scribed gage strains a to b, need to be at least twenty per cent, besides that this share could be lessened for bar178 slot steels using a tensile toughness in surplus of 50,000 psig, as supplied in paragraph (k) of the area.
(4) As a security precaution, if the producer elects for making this take a look at before the hydrostatic check, the manufacturer must style and design the test apparatus so the strain is applied to the smallest location practicable, throughout the level of closure, and so as to utilize the smallest possible quantity of air or gas.
(iii) The bare minimum examination force must be preserved at the very least 30 seconds and adequately lengthier to guarantee complete enlargement. Any inside stress utilized just after heat-treatment method and prior to the Formal test may not exceed 90 p.c of the exam tension.
(two) Once the porosity of every cylinder is not regarded, a cylinder taken at random from lots of 200 or fewer has to be examined for porosity. If your examination cylinder fails, Every single cylinder during the great deal may be tested independently and those cylinders that pass the check are satisfactory.
Markings on each container should be stamped plainly and forever over a long term attachment or on the metallic nameplate forever secured towards the container by suggests in addition to delicate solder.
(2) A spun cylinder is 1 through which an conclusion closure in the concluded cylinder has been welded because of the spinning approach.
(ii) Just one specimen needs to be taken from possibly head over a cylinder when the two heads are created of a similar product. Having said that, if The 2 heads are made of differing products, a specimen needs to be taken from Each individual head.
Necessities for the look, construction, inspection and testing of transportable tanks meant for that transportation of refrigerated liquefied gases.