(ii) Taper threads to get of length not below as specified for American Normal taper pipe threads.
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(1) Each individual opening in the container should be presented by using a fitting, boss or pad of weldable chrome steel securely attached into the container by fusion welding.
Markings might be stamped in to the sidewalls of cylinders having a company tension of one hundred fifty psig if all of the next circumstances are met:
(i) If the chosen cylinder passes the drinking water-jacket or direct growth examination, the remaining cylinders in each large amount needs to be strain tested from the evidence tension h2o-jacket or immediate enlargement exam technique as prescribed in CGA C-one.
(iii) Everlasting volumetric enlargement might not exceed 10 p.c of overall volumetric enlargement at check strain.
Attachments into the container are licensed by fusion welding offered that this sort of attachments are made of weldable stainless steel in accordance with paragraph (b) of the section.
Cylinders need to be made working with devices and processes satisfactory in order that each cylinder produced conforms to the requirements of this subpart.
(ii) In using the “extension less than load” system, the entire strain (or “extension beneath load”) corresponding to the tension at which the 0.two percent everlasting pressure occurs may very well be decided with enough precision by calculating the elastic extension of your gauge duration underneath correct load and adding thereto 0.
The minimum wall thickness need to be this sort of the wall stress within the bare minimum specified take a look at stress won't exceed sixty seven per cent of your minimal tensile power on the steel as determined by the physical exams necessary in paragraphs (j) and (k) of this section.
(iii) For the purpose of strain measurement, the Original pressure has to be set while the specimen is under a strain of twelve,000 psi and the strain indicator reading getting set within the calculated corresponding pressure.
Notwithstanding the variation provided On this paragraph, Every single container need to normally conform to a DOT 2Q container in accordance with § 178.33a. The subsequent ailments also implement under Variation 1—
(ii) Taper threads should be of a size not lower than as specified for American Common taper pipe threads.
(three) As a safety precaution, if the manufacturer elects to help make this exam before the hydrostatic test, the producer must design the test apparatus so which the stress is applied to the smallest area practicable, around the position of closure, and in order to make use of the smallest feasible quantity of air read more or gas.