5 Essential Elements For bar178
5 Essential Elements For bar178
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(iv) Further delivered that wall worry for cylinders having copper brazed longitudinal seams might not exceed ninety five p.c of any of the above mentioned values. Calculated wall thickness may well not consist of galvanizing or other protecting coating.
A Actual physical exam must be performed to determine generate strength, tensile strength, elongation, and reduction of place of material as follows:
(iii) When size of cylinder won't allow securing straight specimens, the specimens could be taken in any location or direction and may be straightened or flattened cold by stress only, not by blows.
(i) One particular specimen needs to be taken longitudinally from your body portion not less than 90 degrees away from the weld.
Longitudinal seams must be a solid lap joint style. When brazed, the plate edge needs to be lapped at the very least eight (8) periods the thickness from the plate, laps being held in situation, significantly metallic to metal, by riveting or electric location-welding; brazing need to be finished by making use of a suitable flux and by positioning brazing substance on one aspect of seam and making use of heat till this material exhibits uniformly alongside the seam of the other side.
(2) In the event the porosity of each cylinder is just not regarded, a cylinder taken at random from a lot of two hundred or significantly less must be analyzed for porosity. If the take a look at cylinder fails, Just about every cylinder within the good deal can be analyzed separately and people cylinders that go the exam are acceptable.
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(iv) A brass fitting might be brazed to your metal boss or flange on cylinders utilised as part portions of handheld fireplace extinguishers.
(4) website If the cylinder floor isn't at first free of charge within the defects, the surface area may very well be machined or otherwise handled to get rid of these defects presented the bare minimum wall thickness is taken care of.
(i) The remaining cylinders in Each individual good deal has to be analyzed through the proof tension drinking water-jacket or direct expansion take a look at method as prescribed in CGA C-one. The minimal take a look at strain needs to be managed for the precise timeframe as well as the screening devices must be calibrated as prescribed in CGA C-one.
(1) Welding or brazing is authorized for that attachment of neckrings and footrings which happen to be non-pressure areas, and only towards the tops and bottoms of cylinders getting a provider tension of five hundred psig or much less.
Welding or brazing of any attachment or opening into the heads of cylinders is permitted offered the carbon information on the steel will not exceed 0.twenty five p.c other than in the situation of 4130 × steel, which can be applied with right welding treatment.
Cylinders with bottoms shut in by spinning have to be subjected to your leakage exam by setting the interior air or gasoline stress not to fewer than the service pressure. Cylinders which leak needs to be rejected.
S = PD / 4tE Where by: S = wall tension in pounds psi; P = test pressure prescribed for water jacket exam, i.e., at least 2 occasions service tension, in psig; D = outdoors diameter in inches; t = minimum amount wall thickness in inches; E = 0.