bar 178 No Further a Mystery
bar 178 No Further a Mystery
Blog Article
(iv) Permanent volumetric expansion may not exceed ten p.c of the overall volumetric enlargement at check strain.
(two) Heat cure is not needed after the welding or brazing of weldable low carbon sections to attachments of similar substance which have been Earlier welded or brazed to the best or bottom of cylinders and adequately warmth dealt with, offered these subsequent welding or brazing doesn't create a temperature in surplus of 400 °File in any Portion of the very best or base product.
(one) A strain, around the same as but not less than the assistance tension, must be applied to a person facet in the completed base in excess of a place of at least one⁄sixteen of the full region of The underside but not under three⁄4 inch in diameter, such as the closure, for a minimum of a person moment, throughout which period another facet of the bottom exposed to tension needs to be lined with water and carefully examined for indications of leakage.
Reheat remedy is licensed for rejected cylinders. Subsequent thereto, cylinders need to pass all prescribed exams to generally be acceptable. Restore by welding or spinning is not really approved.
(1) Specimens has to be taken from a person cylinder soon after warmth remedy as illustrated in appendix A to this subpart, chosen at random from Every number of 200 or fewer, as follows:
The inspector shall put together a report made up of, at a minimum amount, the applicable information and facts listed in CGA C-eleven. Any additional facts or markings that are essential via the relevant specification needs to be shown to the examination report. The signature in the inspector within the reports certifies which the procedures of manufacture and heat treatment of cylinders were being observed and found satisfactory.
(vi) Effect test specimens need to be cooled check here to the design support temperature. The apparatus for testing the specimens have to conform to demands of ASTM Normal E 23. The exam piece, as well as the managing tongs, need to be cooled for the period of time sufficient to reach the provider temperature.
(iv) All straight threads will need to have a minimum of six engaged threads, a good suit, and an element of safety in shear of at the least ten with the exam strain of the cylinder. Shear stress must be calculated through the use of the appropriate thread shear location in accordance with NBS Handbook H-28.
(iii) For the objective of strain measurement, the Preliminary pressure reference needs to be established while the specimen is less than a strain of twelve,000 psi along with the pressure indicator studying being established within the calculated corresponding pressure.
(1) Circumferential seams need to be by brazing only. Heads should be attached to shells because of the lap brazing method and need to overlap not fewer than four occasions the wall thickness. Brazing content need to have a melting issue of not less than one thousand °F.
(iv) A brass fitting can be brazed to your steel boss or flange on cylinders made use of as part elements of handheld fireplace extinguishers.
Materials has to be discovered by any suitable strategy except that plates and billets For warm-drawn cylinders needs to be marked with warmth amount.
Acquire the extra travel slightly south of the main craziness and revel in a comforting bar with lovely girls.
(one) Markings has to be stamped plainly and completely on shoulder or top rated head of jacket or with a completely connected plate or head protective ring.