(one) Each and every cylinder need to be heated and held at the proper temperature for at least one particular hour for every inch of thickness dependant on the maximum thickness in the cylinder after which you can quenched in a suitable liquid medium possessing a cooling fee not in surplus of eighty p.c of h2o.
Reheat procedure of turned down cylinders is licensed. Subsequent thereto, cylinders must move all prescribed assessments for being appropriate. Welds could possibly be repaired by suitable methods of fusion welding.
(ii) Taper threads to become of size not a lot less than as specified for American Standard taper pipe threads.
(ii) In utilizing the “extension underneath load” method, the entire strain (or “extension less than load”) akin to the pressure at which the 0.2 percent long-lasting pressure takes place could be decided with adequate precision by calculating the elastic extension of the gauge duration less than ideal load and introducing thereto 0.
Reheat treatment method of rejected cylinders is approved. Subsequent thereto, cylinders will have to go all prescribed tests to generally be satisfactory. Maintenance by welding or spinning is not licensed.
At or ahead of the time of shipping on the purchaser, the cylinder company needs to have all finished certification documents mentioned in CGA C-11. The manufacturer of your cylinders ought to retain the reports expected by this subpart for 15 many years from the first examination date with the cylinder.
Testing is necessary on two (2) specimens faraway from the sphere or flat consultant sample plates of exactly the same warmth of fabric taken at random in the metal utilised to supply the spheres.
(iii) When size with the cylinder will not allow securing straight specimens, the specimens could possibly be taken in any locale or path and may be straightened or flattened cold, by pressure only, not by blows.
S = Mc/I (iii) To determine the maximum longitudinal tensile tension because of hydrostatic check strain, the next system should be employed:
Materials should be identified by any suitable method apart from that plates and billets For decent-drawn cylinders need to be marked with the warmth variety.
(iii) For the purpose of pressure measurement, the Preliminary strain reference needs to be established even though the specimen is beneath a tension of twelve,000 psi plus the strain indicator studying remaining established on the calculated corresponding strain.
Markings on Just about every container have to be stamped plainly and completely on the permanent attachment or with a steel nameplate completely secured towards the container by means in addition to smooth solder.
Cylinders must be produced working with gear and processes enough to make sure that Just about every cylinder produced conforms to the requirements of this subpart. No defect is suitable that is likely to weaken the completed cylinder appreciably.
(iii) On the cylindrical part of the shell that extends past the recessed bottom of the read more cylinder, constituting an integral and non-tension Element of the cylinder;