bar178 login Secrets
bar178 login Secrets
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Markings must be stamped plainly and permanently over a lasting attachment or with a metal nameplate completely secured to your container by signifies aside from soft solder.
Cylinders have to be created using devices and procedures sufficient to make sure that Each and every cylinder created conforms to the necessities of this subpart. No defect is permitted that is probably going to weaken the concluded cylinder appreciably. A fairly clean and uniform area end is necessary. Heads might be connected to shells by lap brazing or may be shaped integrally.
The finished cylinders needs to be uniformly and properly warmth addressed prior to tests. Warmth treatment of cylinders with the approved analyses must be as follows:
Markings may very well be stamped into the sidewalls of cylinders having a service stress of one hundred fifty psig if all of the next conditions are fulfilled:
(i) The phrase “spun” or “plug” needs to be placed near the DOT specification marking when an close closure from the completed cylinder has long been welded with the spinning system, or effected by plugging.
Reheat procedure of rejected cylinders is approved one time. Subsequent thereto, cylinders must move all prescribed exams to become acceptable.
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(iv) A brass fitting may very well be brazed to the metal boss or flange on cylinders employed as ingredient aspects of handheld fire extinguishers.
(iii) For the goal of strain measurement, the initial strain reference has to be established while the specimen is beneath a worry of twelve,000 psi as well as strain indicator studying currently being established on the calculated corresponding pressure.
(1) During this specification, a “large amount” usually means a gaggle of cylinders successively produced owning precisely the same:
(iii) Straight threads, having at the very least four engaged threads, to possess tight in shape and calculated shear energy at the very least 10 periods the take a look at force with the container; gaskets expected, enough to avoid leakage.
(ii) Taper threads being of duration not under as specified for American Typical taper pipe threads.
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Notwithstanding the variation provided On this paragraph, Each website individual container should usually conform to some DOT 2Q container in accordance with § 178.33a. The next conditions also use less than Variation 2—