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(ii) Taper threads must be of the duration not below as specified for American Normal taper pipe threads.

(6) Intermediate manganese steels may very well be tempered at temperatures not fewer than 1150 °File., and just after warmth dealing with Just about every cylinder should be submitted to the magnetic exam to detect the existence of quenching cracks. Cracked cylinders should be turned down and ruined.

(ii) Taper threads have to be of the duration not lower than that specified for American Conventional taper pipe threads.

Heads attached by brazing should have a driving suit Using the shell, Except if the shell is crimped, swedged, or curled around the skirt or flange of the head, and become extensively brazed right until entire penetration via the brazing materials in the brazed joint is secured. Depth of brazing in the joint has to be no less than four (four) times the minimum thickness of shell metal.

(1) The attachment to the tops or bottoms of cylinders of neckrings, footrings, handlers, bosses, pads, and valve preserving rings is approved presented that this kind of attachments as well as the portion of the container to which They can be attached are made of weldable metal, the carbon content of which can not exceed 0.25 percent.

Typical taper pipe threads demanded in all openings. The duration with the opening will not be a lot less than as specified for American Normal pipe threads; tapped to gauge; cleanse Slash, even, and with no checks.

(iii) For the objective of pressure measurement, the Preliminary pressure must be established while the specimen is underneath a strain of 12,000 psi and also the pressure indicator reading staying established with the calculated corresponding pressure.

(four) Establish porosity of filling and tare weights; verify compliance of marking with prescribed prerequisites; acquire important copies of metal shell reports prescribed in paragraph (b) of this portion; and furnish full take a look at reports demanded by this specification to the one who has accomplished the manufacturer of the cylinders and, on request, on the purchaser.

(ii) In utilizing the “extension less than load” method, the entire strain (or “extension below load”) comparable to the pressure at which the 0.2 per cent permanent pressure happens can be identified with ample accuracy by calculating the elastic extension of the gauge length beneath ideal load and including thereto 0.

(iv) All straight threads should have at the very least 6 engaged threads, a tight healthy, and a factor of safety in shear of a minimum of ten on the check tension on the cylinder. Shear worry needs to be calculated by utilizing the appropriate thread shear spot in accordance with NBS Handbook H-28.

Cylinders must be created using equipment and procedures enough to make sure that Each and every cylinder made conforms to the necessities of the subpart. No defect is permitted that is likely to weaken the completed cylinder appreciably.

Only open hearth, basic oxygen, or electric furnace course of action steel of uniform good quality is licensed. The steel Assessment need to conform to the subsequent:

Heads shaped by drawing or pressing must be uniformly and effectively heat taken care of just before exams. Cylinders with integral fashioned heads or bases need to be subjected click here to the normalizing operation.

This portion prescribes the manufacturing and tests technical specs for packaging and containers employed for the transportation of hazardous supplies in commerce.