5 Essential Elements For bar178
5 Essential Elements For bar178
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Open up hearth or electric powered furnace metal of uniform good quality has to be used. A heat of steel built beneath the requirements stated in Desk one in this paragraph (b), a Look at chemical Assessment that's a little out of the desired variety is acceptable, if satisfactory in all other respects, supplied the tolerances shown in Table two In this particular paragraph (b) usually are not exceeded.
(2) Every opening inside of a spherical variety of cylinder need to be furnished using a fitting, boss, or pad of weldable steel securely attached to the cylinder by fusion welding.
(one) Every single opening in the container should be offered by using a fitting, manager or pad of weldable chrome steel securely connected on the container by fusion welding.
Markings may be stamped into the sidewalls of cylinders possessing a services strain of one hundred fifty psig if all of the subsequent situations are achieved:
(ii) Circumferential seams should be created by welding or by brazing. Heads attached by brazing will need to have a driving healthy Together with the shell Except the shell is crimped, swedged, or curled over the skirt or flange of the head and have to be thoroughly brazed until finally finish penetration because of the brazing content with the brazed joint is secured. Depth of brazing from close from the shell should be at the least four (4) instances the thickness of shell metal.
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(iii) The minimal exam force has to be managed at the least thirty seconds and adequately more time to be certain complete growth. Any inside force used soon after heat-cure and previous to the official check may well not exceed 90 per cent of the take a look at stress.
(a) By appliances and solutions that should assure uniformity of finished containers; Grime and scale to get taken out as required; no defect acceptable that is probably going to weaken the completed container appreciably; moderately easy and uniform area finish needed.
(iii) The least test stress has to be managed at the very least thirty seconds and sufficiently extended to ensure total expansion. Any interior strain applied right after warmth-treatment method and before the Formal test might not exceed ninety % in the test tension.
In addition to the necessities of § 178.35, the inspector's report for that Actual physical check report, need to indicate the standard worth for three specimens and also the minimum price for a person specimen for every lot read more number.
(iv) A brass fitting can be brazed to the steel manager or flange on cylinders employed as element portions of handheld hearth extinguishers.
(two) A manufacturer of a packaging issue to the requirements of the component is generally liable for compliance with the necessities of this component. However, any person who performs a functionality prescribed in this portion shall carry out that purpose in accordance using this type of portion.
(1) The test should be amongst knife edges, wedge shaped, having a sixty° incorporated angle, and rounded in accordance with the following desk. The longitudinal axis of your cylinder needs to be at an angle 90° on the knife edges through the take a look at. The flattening take a look at desk is as follows:
Notwithstanding the variation supplied With this paragraph, Every single container have to if not conform to a DOT 2Q container in accordance with § 178.33a. The subsequent situations also apply beneath Variation two—