What Does situs bar178 Mean?

What Does situs bar178 Mean?

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(1) Each cylinder have to be heated and held at the appropriate temperature for a minimum of one particular hour for each inch of thickness dependant on the utmost thickness of the cylinder and then quenched in an appropriate liquid medium using a cooling rate not in surplus of eighty p.c of h2o.

All spun cylinders and plugged cylinders needs to be analyzed for leakage by fuel or air pressure soon after the bottom has been cleaned and is free from all moisture, subject matter to the following circumstances and restrictions:

(ii) Taper threads to be of size not less than as specified for American Typical taper pipe threads.

Repairs of rejected cylinders is approved. Cylinders that are leaking must be turned down, other than that:

Attachments on the container are approved by fusion welding furnished that these types of attachments are made of weldable stainless-steel in accordance with paragraph (b) of the section.

Cylinders has to be produced using products and procedures enough to ensure that Just about every cylinder created conforms to the requirements of this subpart. No fissure or other defect is permitted that is probably going to weaken the finished container appreciably. The general area end might not exceed a roughness of 250 RMS. Individual irregularities such as attract marks, scratches, pits, and many others., should be held to a minimum amount according to good high worry stress vessel producing techniques.

(iii) For the objective of strain measurement, the initial strain should be set even though the specimen is underneath a tension of twelve,000 psi and also the pressure indicator reading currently being set with the calculated corresponding pressure.

All spun cylinders and plugged cylinders have to be analyzed for leakage by gas or air tension soon after The underside has long been cleaned and is free from all moisture. Force, roughly similar to but no less than the company stress, must be placed on a single side of your completed base more than a location of a minimum of 1⁄sixteen of the full location of the bottom although not less than 3⁄4 inch in diameter, such as the closure, for a minimum of one minute, for the duration of which era one other facet of The underside exposed to stress should be lined with drinking water and carefully examined for indications of leakage.

(ii) In using the “extension underneath load” technique, the overall strain (or “extension below load”) comparable to the anxiety at which the 0.two percent permanent strain occurs might be determined with ample accuracy by calculating the elastic extension with the gauge length less than acceptable load and including thereto 0.

One cylinder taken at random out of each large amount of 200 or much less, should be subjected check here to a flattening test as follows:

(vii) The impression Attributes of each set of influence specimens will not be less than the values in the next table:

(iv) A brass fitting might be brazed on the metal manager or flange on cylinders made use of as component parts of handheld fire extinguishers.

(one) Welding or brazing is authorized for the attachment of neckrings and footrings which are non-pressure pieces, and only to your tops and bottoms of cylinders getting a support force of 500 psig or fewer.

(iv) On the plate attached to the top on the cylinder or long term element thereof; adequate House need to be remaining to the plate to supply for stamping a minimum of 6 retest dates; the plate needs to be at the very least one⁄sixteen inch thick and has to be attached by welding, or by brazing in a temperature of no less than 1100 °F., all over all edges of your plate;