The attachment to the tops and bottoms only of cylinders by welding of neckrings, footrings, handles, bosses, pads and valve safety rings is approved furnished that this kind of attachments along with the part of the container to which These are hooked up are made of weldable steel, the carbon material of which may not exceed 0.25 %.
Cylinders need to be created employing gear and processes suitable to make certain that Every cylinder produced conforms to the necessities of this subpart. No defect is permitted that is probably going to weaken the completed cylinder appreciably. A fairly clean and uniform surface complete is needed. Heads could possibly be attached to shells by lap brazing or might be shaped integrally.
(two) Every single cylinder have to fulfill the following supplemental need which assumes a cylinder horizontally supported at its two ends and uniformly loaded around its complete size.
Marking needs to be finished by stamping into the steel of your cylinder. All markings have to be legible and Found over a shoulder.
A root bend check specimen needs to be removed from the cylinder or welded take a look at plate that was utilized for the tensile examination laid out in paragraph (l)(1) of the portion. The specimen has to be taken from across the circumferential seam and has to be organized and analyzed in conformance with and ought to meet up with the necessities of CGA C-three.
(2) In the event the porosity of each and every cylinder just isn't known, a cylinder taken at random from plenty of 200 or much less have to be examined for porosity. If the take a look at cylinder fails, Each more info individual cylinder inside the good deal could possibly be tested independently and people cylinders that pass the exam are acceptable.
(b) Design qualification screening has to be finished if the look is produced having a new mould or when there is any modify inside the Attributes of the fabric of design.
(iii) The minimal exam stress need to be maintained at the least thirty seconds and adequately more time to make sure entire enlargement. Any internal stress utilized just after warmth-cure and just before the official check may not exceed ninety p.c of your take a look at tension.
(3) Each and every specimen for the tension and Charpy impression checks need to be taken in the facet wall of the cylinder or from a hoop which has been heat dealt with Together with the finished cylinders of which the specimens need to be representative. The axis of your specimens has to be parallel to your axis on the cylinder.
All spun cylinders and plugged cylinders needs to be tested for leakage by gasoline or air pressure after The underside has been cleaned which is no cost from all humidity issue to the subsequent situations and limitations:
Cylinders with bottoms shut in by spinning has to be leakage examined by placing the inside air or gas pressure at not under the company stress. Any cylinder that leaks needs to be turned down.
Product has to be determined by any acceptable approach apart from that plates and billets For decent-drawn cylinders need to be marked with warmth quantity.
(ii) Taper threads have to be of the length not less than as specified for American Typical taper pipe threads.
The limiting chemical composition of steel authorized by this specification needs to be as demonstrated in table I of appendix A to this section.