Not known Facts About bar178 link alternatif
Not known Facts About bar178 link alternatif
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(ii) Taper threads to be of length not under as specified for American Common taper pipe threads.
(ii) Verifying the prescribed minimum thickness was achieved by measuring or witnessing the measurement with the wall thickness; and
(one) Pressure, approximately the same as but no below service pressure, must be placed on just one aspect with the concluded base about a location of at least one⁄sixteen of the total space of The underside although not below three⁄four inch in diameter, such as the closure, for at least one moment, throughout which time one other facet of The underside exposed to strain has to be protected with drinking water and intently examined for indications of leakage. Other than as offered in paragraph (n) of the portion, cylinders which are leaking must be turned down.
This exam may very well be used and should be as required by CGA Pamphlet C-3. The specimen should be bent until finally the elongation with the outer area, adjacent to the basis in the weld, among the frivolously scribed gage traces-a to b, is at least 20 %, except this proportion could possibly be reduced for steels possessing a tensile strength in excessive of 50,000 psi, as presented in paragraph (k) of this section.
A specimen have to be removed from one particular cylinder of every large amount of 200 or much less, or welded test plate. The welded examination plate must be of one of several heats within the wide range of 200 or fewer which it signifies, in exactly the same condition and around the same thickness given that the cylinder wall other than that in no case should it's of a lesser thickness than that expected for a quarter sizing Charpy affect specimen. The weld has to be produced by the identical strategies and subjected to the identical heat procedure as the main weld over the cylinder.
(1) A physical test for any sphere is necessary on 2 specimens Reduce from a flat consultant sample plate of the same warmth taken at random in the steel utilized to make the sphere.
Reheat therapy of rejected cylinders is authorized. Subsequent thereto, cylinders need to move all prescribed exams to get satisfactory. Welds might be repaired by suited ways of fusion welding.
(1) Welding or brazing is authorized for that attachment of neckrings and footrings that are non-strain areas, and only to the tops and bottoms of cylinders using a support tension of 500 psig or considerably less.
Each cylinder have to be uniformly and properly heat handled, just before assessments, by any acceptable approach in extra of 1100 °F. Heat cure need to be accomplished In the end forming and welding functions, besides that when brazed joints are made use of, warmth therapy should follow any forming and welding functions but could possibly be completed before, for the duration of, or bar178 link alternatif following the brazing operations. Liquid quenching just isn't licensed.
(one) Circumferential seams need to be by brazing only. Heads should be hooked up to shells with the lap brazing system and will have to overlap not fewer than four moments the wall thickness. Brazing material have to have a melting point of not under one thousand °File.
(iii) On the cylindrical percentage of the shell that extends past the recessed bottom from the cylinder constituting an integral and non-tension Section of the cylinder.
A specimen must be cut from one cylinder of every lots of 200 or much less, or welded test plate. The welded exam plate needs to be of among the list of heats while in the great deal of 200 or considerably less which it signifies, in precisely the same problem and approximately exactly the same thickness because the cylinder wall other than that it is probably not of a lesser thickness than that essential for a quarter size Charpy impression specimen. The weld need to be created by the exact same strategies and subjected to a similar heat treatment as the most important weld about the cylinder.
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(ii) Taper threads to become of size not less than as specified for American Common taper pipe threads.