bar178 No Further a Mystery
bar178 No Further a Mystery
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(two) The design support temperature will be the coldest temperature for which a cylinder is suited. The needed design support temperatures for each cryogenic liquid is as follows:
Substance has to be recognized by any ideal technique, except that plates and billets For warm-drawn cylinders needs to be marked with the heat variety.
Reheat procedure is authorized for rejected cylinders. Subsequent thereto, cylinders should go all prescribed tests for being suitable. Restore by welding or spinning isn't licensed.
(two) Cylindrical type cylinder layouts have to be of circumferentially welded or brazed building; longitudinally brazed or silver-soldered seams can also be permitted.
The least wall thickness has to be this sort of the wall stress at the bare minimum specified exam pressure may not exceed 67 per cent of your minimum tensile toughness of your steel as determined within the Actual physical and burst exams demanded and is probably not about 70,000 p.
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(ii) The examination have to be among parallel metal plates on the press using a welded seam at appropriate angles on the plates. Any projecting appurtenances may be Reduce off (by mechanical usually means only) prior to crushing.
Reheat procedure of rejected cylinders is licensed. Subsequent thereto, cylinders have to move all prescribed assessments being satisfactory. Restore by welding is authorized.
One particular container taken at random outside of two hundred or significantly less needs to be hydrostatically examined to destruction. Rupture pressure have to be integrated as Component of the inspector's report.
(2) All features carried out by, or on behalf of, the individual whose name or image seems as Section of the marking conform to demands specified in this aspect.
(iii) For the goal of strain measurement, get more info the initial pressure have to be established while the specimen is beneath a strain of twelve,000 psi as well as the strain indicator looking through being established with the calculated corresponding strain.
Each individual cylinder, in advance of insulating and jacketing, should correctly withstand a tension exam as follows:
(iii) The least exam tension needs to be maintained at least thirty seconds and sufficiently extended to be certain finish growth. Any interior force applied after warmth-therapy and ahead of the official check may not exceed 90 percent with the exam tension.
(six) Intermediate manganese steels may be tempered at temperatures not under 1150 °F., and right after heat treating Just about every cylinder needs to be submitted to a magnetic test to detect the existence of quenching cracks. Cracked cylinders needs to be turned down and destroyed.