All spun cylinders and plugged cylinders needs to be analyzed for leakage by dry gas or dry air force following The underside has long been cleaned and is also free from all moisture, subject to the following ailments and constraints:
Welding or brazing for virtually any intent in anyway is prohibited besides that welding is approved to the attachment of neckrings and footrings that are nonpressure components, and only to the tops and bottoms of cylinders.
Reheat remedy is licensed for turned down cylinders. Subsequent thereto, cylinders need to pass all prescribed tests to get appropriate. Repair service by welding or spinning isn't licensed.
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Following the hydrostatic examination, the cylindrical area of each vessel has to be examined in accordance with ASTM E 213 for shear wave and E 114 for straight beam (IBR, Typical see
(iii) When sizing on the cylinder isn't going to permit securing straight specimens, the specimens could be taken in almost any spot or direction and could be straightened or flattened cold, by force only, not by blows.
This check may very well be used and should be as required by CGA C-3. The specimen has to be bent till the elongation within the outer surface area, adjacent to the foundation with the weld, among the frivolously scribed gage traces a to b, has to be at least 20 p.c, besides that this proportion may be lessened for steels having a tensile strength in surplus of fifty,000 psig, as provided in paragraph (k) of the part.
(1) All seams from the cylinder should be fusion welded. A way needs to be offered for carrying out comprehensive penetration from the joint. Only butt or joggle butt joints for the cylinder seams are approved. All joints in the cylinder will need to have fairly accurate alignment.
Reheat therapy is authorized for turned down cylinders. Subsequent thereto, cylinders should move all prescribed tests being acceptable. Fix by welding is just not approved.
(two) Each and every opening from the cylinder, apart from People for basic safety devices, needs to be supplied using a fitting manager, or pad, securely connected to the cylinder by welding or by threads. If threads are employed they have to adjust to the following:
(1) Force, about similar to but no fewer than provider force, have to be applied to one facet on the completed bottom in excess of a location of not less than one⁄sixteen of the total space of the bottom although not less than 3⁄4 inch in diameter, including the closure, for a minimum of one moment, for the duration of which era the opposite side of The underside exposed to tension have check here to be lined with drinking water and closely examined for indications of leakage. Except as presented in paragraph (n) of this portion, a cylinder that's leaking should be turned down.
(ii) Taper threads being of duration not fewer than as specified for American Standard taper pipe threads.
(ii) Taper threads must be of the duration not less than as specified for American Normal taper pipe threads.
(ii) Taper threads to get of duration not below as specified for American Common taper pipe threads.