(2) The design provider temperature is definitely the coldest temperature for which a cylinder is suited. The expected style service temperatures for each cryogenic liquid is as follows:
A physical check must be performed to determine yield toughness, tensile power, elongation, and reduction of area of material as follows:
Stress-retaining materials should be determined by any suitable process that doesn't compromise the integrity of the cylinder. Plates and billets for hotdrawn cylinders have to be marked with the warmth quantity.
This exam may very well be used and should be as required by CGA Pamphlet C-3. The specimen must be bent right up until the elongation with the outer floor, adjacent to the basis of your weld, in between the frivolously scribed gage lines-a to b, is no less than twenty per cent, besides that this percentage may very well be lessened for steels having a tensile strength in excess of fifty,000 psi, as delivered in paragraph (k) of this part.
(iv) Lasting volumetric enlargement may not exceed 10 percent of the entire volumetric growth at exam strain.
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(iv) Lasting volumetric growth may well not exceed 10 p.c of the overall volumetric growth at check tension.
(iii) Straight threads, having at least four engaged threads, to get tight match and calculated shear toughness at the least 10 moments the check force with the cylinder; gaskets essential, sufficient to stop leakage.
Heads hooked up by brazing will need to have a driving match With all the shell, Until the shell is crimped, swedged, or curled in excess of the skirt or flange of The top, and become comprehensively brazed until eventually complete penetration via the brazing material with the brazed joint is secured. Depth of brazing in the joint should be not less than four (four) periods the minimum amount thickness of shell metallic.
(one) Within this specification, a “good deal” suggests a bunch of cylinders successively manufactured getting the identical:
Cylinders need to be created employing machines and procedures sufficient to ensure that Every single cylinder created conforms to the necessities of this subpart. No defect is appropriate that is likely to weaken the finished cylinder appreciably.
Reheat cure of rejected cylinders is licensed. Subsequent click here thereto, cylinders need to pass all prescribed tests for being suitable. Mend by welding or spinning is not licensed.
(iii) The minimum amount take a look at tension need to be taken care of not less than 30 seconds and sufficiently more time to be sure entire enlargement. Any interior strain utilized soon after heat-cure and just before the official check may not exceed 90 per cent of your check strain.
One particular completed cylinder chosen at random out of each wide range of 500 or considerably less successively developed should be hydrostatically tested to 4