(i) Executing or witnessing the effectiveness of your chemical analyses on each soften or Solid ton or other unit of starting up substance; or
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(one) A spun cylinder is just one wherein an finish closure while in the finished cylinder has actually been welded via the spinning course of action.
Reheat cure is licensed for the turned down cylinder in accordance using this paragraph (m). Following reheat, a cylinder will have to go all prescribed exams On this portion to generally be appropriate. Restore of brazed seams by brazing and welded seams by welding is considered authorized.
(iv) Long term volumetric enlargement may well not exceed 10 per cent of the full volumetric growth at take a look at pressure.
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Two check specimens Reduce from just one cylinder representing Just about every large amount of 200 cylinders or significantly less has to be subjected to your mechanical Attributes test, as follows:
All spun cylinders and plugged cylinders should be tested for leakage by fuel or air force right after the bottom has become cleaned and is particularly absolutely free from all dampness, matter to the subsequent situations:
(4) In the event the cylinder surface area isn't originally no cost within the defects, the area may very well be machined or otherwise treated to eradicate these defects delivered the minimal wall thickness is maintained.
As well as the necessities of § 178.35, the inspector's report with the Bodily exam report, ought to indicate the typical worth for 3 specimens as well as minimal value for 1 specimen for each great deal amount.
Cylinders needs to be created applying equipment and procedures satisfactory to make certain Every cylinder developed conforms to the necessities of this subpart. No defect is acceptable that is probably going to weaken the concluded cylinder appreciably.
(two) All seams of your sphere or cylinders need to be fusion welded. Seams has to be of your butt or joggle butt variety and indicates need to be delivered for accomplishing comprehensive penetration from the joint.
(ii) Taper threads should be of the duration not below as specified for American Normal taper pipe threads.
(one) In the event the click here cylinders are warmth addressed in a batch furnace, two tension specimens and three Charpy effect specimens has to be examined from one of several cylinders or maybe a exam ring from Each individual batch. The large amount sizing represented by these checks might not exceed 200 cylinders.