(two) The heads have to be seamless, concave side to your strain, hemispherical or ellipsoidal in shape with the most important diameter not greater than 2 times the slight diameter.

(1) Until otherwise stated, if a sample cylinder or specimen taken from many cylinders fails the prescribed test, then two further specimens need to be chosen within the exact same large amount and subjected to your prescribed check. If both of those fails the exam, then your entire lot must be rejected.

Markings might be stamped in the sidewalls of cylinders having a support tension of 150 psig if all of the next disorders are met:

Each and every container need to be hydraulically pressurized inside a drinking water jacket to at the very least one hundred pc, although not greater than one hundred ten percent, on the exam stress and managed at this pressure for at least three minutes. Total and lasting expansion have to be recorded and A part of the inspector's report.

Reheat treatment method of rejected cylinders is approved. Subsequent thereto, cylinders must move all prescribed tests to get acceptable. Repair service by welding or spinning isn't licensed.

(i) The remaining cylinders in Just about every whole lot has to be tested by the proof stress water-jacket or immediate expansion test process as prescribed in CGA C-1. The minimum examination pressure have to be preserved for the specific timeframe as well as screening equipment needs to be calibrated as prescribed in CGA C-1.

(one) Cylinders need to be marked by minimal tension type metal stamping in a place and to a depth that may insure that the wall thickness calculated through the root in the stamping to the inside surface area is equivalent click here to or larger as opposed to minimal prescribed wall thickness. Stamping needs to be everlasting and legible. Stamping on side wall not licensed.

(i) The remaining cylinders in the great deal has to be examined through the proof strain, drinking water-jacket, or direct expansion check approach as prescribed in CGA C-1. The minimum check pressure should be maintained for the specific timeframe and the testing equipment must be calibrated as prescribed in CGA C-one.

The completed containers have to be uniformly and appropriately heat-taken care of just before exams. Heat-therapy of containers from the authorized analysis must be as follows:

Reheat procedure is authorized for rejected cylinders. Having said that, Each and every reheat dealt with cylinder must subsequently pass every one of the prescribed checks. Repair by welding just isn't approved.

A specimen have to be Minimize from one particular cylinder of every great deal of 200 or less, or welded exam plate. The specimen needs to be taken from throughout the important seam and have to be well prepared and tested in accordance with and ought to satisfy the necessities of CGA Pamphlet C-3.

Only open up hearth, fundamental oxygen, or electric powered furnace method steel of uniform good quality is licensed. The steel Evaluation should conform to the next:

(1) Welding or brazing is authorized for that attachment of neckrings and footrings which are non-strain sections, and only towards the tops and bottoms of cylinders getting a company pressure of 500 psig or considerably less.

(two) Warmth treatment just isn't essential just after welding or brazing weldable low carbon elements to attachments, specified in paragraph (f)(1) of this part, of comparable product that have been Beforehand welded or brazed to the top or base of cylinders and correctly heat handled, offered these kinds of subsequent welding or brazing won't deliver a temperature in excessive of four hundred °File in almost any Component of the best or base substance.