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(iii) Acquiring a certified Verify Investigation on a single cylinder out of every large amount of 200 cylinders or considerably less, if a certification containing information to indicate compliance with the material specification is acquired.

(one) Pressurization should be performed hydrostatically amongst roughly zero psig as well as the services pressure at a charge not in excess of ten cycles for each moment. Adequate recording instrumentation has to be presented if gear is usually to be remaining unattended for amounts of time.

Reheat therapy is authorized for rejected cylinders. Subsequent thereto, cylinders must go all prescribed tests to become satisfactory. Restore by welding or spinning is just not approved.

Marking on Every single container by stamping plainly and forever are only authorized the place the metal is at the least 0.09 inch thick, or on the steel nameplate permanently secured towards the container by means other than soft solder, or by means that may not decrease the wall thickness.

(one) Specimens need to be taken from a single cylinder just after heat cure as illustrated in appendix A to this subpart, selected at random from Every single number of two hundred or less, as follows:

(3) A plugged cylinder is a single in which a long term closure in The underside of the completed cylinder has actually been effected by a plug.

Two take a look at specimens Reduce from a person cylinder representing each wide range of 200 cylinders or a lot less have to be subjected into the mechanical Homes exam, as follows:

(iii) Straight threads, having at the very least four engaged threads, to have tight in shape and calculated shear toughness a minimum of ten situations the check strain with the cylinder; gaskets required, satisfactory to prevent leakage.

(ii) In using the “extension below load” system, the full strain (or “extension below load”), akin to the worry at which the 0.two percent long lasting pressure takes place might be established with adequate accuracy by calculating the elastic extension on the gauge size underneath appropriate load and more info including thereto 0.

A root bend take a look at specimen have to be removed from the cylinder or welded exam plate useful for the tensile exam specified in paragraph (m)(one) of the portion. Specimens must be taken from across the longitudinal seam and should be ready and tested in conformance with the necessities of CGA C-3.

(iii) For the goal of pressure measurement, the Preliminary strain need to be established when the specimen is less than a tension of 12,000 psi as well as pressure indicator reading through being established for the calculated corresponding pressure.

Repairs of rejected cylinders is licensed. Cylinders that are leaking need to be turned down, other than that:

(ii) In using the “extension less than load” technique, the full strain (or “extension underneath load”) corresponding to the pressure at which the 0.two percent everlasting strain occurs could be established with adequate precision by calculating the elastic extension with the gauge length below appropriate load and adding thereto 0.

Screening is needed on two (two) specimens removed from one cylinder or portion thereof taken at random out of each wide range of 200 or much less. Samples should be eliminated following warmth treatment as illustrated in appendix A to this subpart.