The smart Trick of bar 178 That No One is Discussing
The smart Trick of bar 178 That No One is Discussing
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(ii) Taper threads has to be of the duration not lower than as specified for American Common taper pipe threads.
Cylinders has to be created making use of tools and processes suitable making sure that Each individual cylinder developed conforms to the requirements of this subpart.
(four) As a safety precaution, If your producer elects to create this test ahead of the hydrostatic take a look at, the maker must style and design the check equipment so which the stress is applied to the smallest spot practicable, within the level of closure, and in order to use the smallest feasible quantity of air or fuel.
Cylinders should be produced using gear and processes enough to make sure that Every single cylinder manufactured conforms to the necessities of the subpart. No defect is permitted that is likely to weaken the finished cylinder appreciably.
(1) No defect is permitted that is probably going to weaken the finished cylinder appreciably. A fairly smooth and uniform surface is necessary.
(ii) The serial number has to be positioned just below or straight away subsequent the DOT specification marking.
(iii) Straight threads owning at least four engaged threads, to have limited healthy and calculated shear energy not less than ten times the check strain on the container; gaskets essential, ample to avoid leakage.
Body and heads formed by drawing or pressing have to be uniformly and thoroughly heat handled just before assessments.
The completed cylinders has to be uniformly and effectively heat handled before exams. Heat therapy of cylinders from the authorized analyses must be as follows:
(i) The remaining cylinders in Every single great deal must be force tested by the evidence pressure, h2o-jacket or direct enlargement examination method as prescribed in CGA C-one. The minimum exam strain should be preserved for the specific timeframe as well as screening equipment need to be calibrated as prescribed in CGA C-1.
(iii) For the goal of pressure measurement, the initial strain reference have to be established while the specimen is below a pressure of 12,000 psi and also the pressure indicator reading currently being established at the calculated corresponding strain.
(one) Force, somewhere around similar to but no less than service pressure, should be applied to 1 side from the finished bottom more than an area of a minimum of 1⁄sixteen of the overall place of The underside but not lower than 3⁄four inch in diameter, such as the closure, for at least 1 minute, in the course of which time another facet of The underside subjected to stress needs to be coated with water and closely examined for indications of leakage. Besides as offered in paragraph (n) of the portion, a cylinder that may be more info leaking has to be rejected.
Cylinders must be produced using machines and processes satisfactory to make certain Each individual cylinder manufactured conforms to the requirements of the subpart. No defect is appropriate that is likely to weaken the concluded cylinder appreciably.
One particular container taken at random out of two hundred or less have to be hydrostatically examined to destruction. Rupture pressure must be incorporated as Element of the inspector's report.