(three) Over a plate attached to the very best with the cylinder or long-lasting component thereof: enough Area must be left on the plate to deliver for stamping a minimum of six retest dates: the plate needs to be not less than one⁄sixteen inch thick and need to be connected by welding or by brazing at a temperature of no less than 1100 °File, all over all edges with the plate.
(i) The remaining cylinders in Just about every whole lot need to be pressure analyzed via the evidence tension, water-jacket or immediate enlargement examination process as prescribed in CGA C-one. The bare minimum examination tension needs to be managed for the particular timeframe as well as screening machines has to be calibrated as prescribed in CGA C-1.
(1) Tension, somewhere around the same as but no a lot less than services force, need to be applied to 1 aspect from the concluded bottom above a region of at least 1⁄16 of the whole space of The underside but not under 3⁄four inch in diameter, including the closure, for a minimum of 1 minute, in the course of which time the other aspect of The underside exposed to strain have to be included with h2o and intently examined for indications of leakage. Other than as presented in paragraph (n) of the part, cylinders which might be leaking has to be rejected.
(iii) Straight threads have to have at the very least 4 engaged threads, tight in good shape and calculated shear toughness no less than 10 instances the examination strain of the cylinder. Gaskets, which avert leakage and so are inert on the hazardous materials, are essential.
(iii) For the purpose of pressure measurement, the First pressure has to be set when the specimen is underneath a pressure of twelve,000 psi as well as the pressure indicator reading through staying established in the calculated corresponding pressure.
(ii) Obtaining a certified chemical Assessment from the website fabric or cylinder manufacturer for each melt, or cast of material; or
(iii) The minimum take a look at pressure have to be preserved not less than 30 seconds and adequately extended to be certain full enlargement. Any inside stress utilized just after warmth-treatment and previous to the Formal examination may not exceed ninety p.c of your check force.
(iv) Long-lasting volumetric growth might not exceed 10 per cent of the whole volumetric enlargement at take a look at force.
(iii) Straight threads obtaining at least four engaged threads, to have restricted in good shape and calculated shear power at least ten instances the take a look at strain in the container; gaskets needed, adequate to circumvent leakage.
Reheat procedure is authorized for rejected cylinders. Subsequent thereto, cylinders need to pass all prescribed assessments to get suitable. Fix by welding or spinning isn't approved.
Cylinders has to be manufactured utilizing gear and procedures suitable to make sure that Each and every cylinder made conforms to the requirements of the subpart. No defect is permitted that is probably going to weaken the completed cylinder appreciably.
One particular container taken at random outside of two hundred or much less need to be hydrostatically examined to destruction. The rupture force needs to be integrated as Portion of the inspector's report.
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(ii) Taper threads to get of size not a lot less than as specified for American Typical taper pipe threads.