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(1) By very best appliances and procedures. No defect is suitable that is likely to weaken the finished container appreciably. A reasonably sleek and uniform surface complete is necessary.

Open up-hearth or electric steel of uniform good quality has to be utilized. A warmth of metal built less than desk 1 in this paragraph (b), Look at chemical Assessment of that is slightly from the required vary, is suitable, if satisfactory in all other respects, provided the tolerances revealed in table 2 Within this paragraph (b) will not be exceeded except as accredited via the Affiliate Administrator. The subsequent chemical analyses are licensed:

(1) The take a look at have to be concerning knife edges, wedge formed, getting a sixty° bundled angle, and rounded in accordance with the following desk. The longitudinal axis of the cylinder has to be at an angle 90° for the knife edges throughout the take a look at. The flattening take a look at desk is as follows:

(ii) Circumferential seams needs to be created by welding or by brazing. Heads attached by brazing will need to have a driving healthy While using the shell Except if the shell is crimped, swedged, or curled over the skirt or flange of The pinnacle and should be totally brazed until eventually full penetration by the brazing substance of your brazed joint is secured. Depth of brazing from close of your shell has to be at the very least 4 (four) situations the thickness of shell steel.

(iii) Straight threads have to have a minimum of four engaged threads, tight match and calculated shear energy at least 10 periods the exam pressure of the cylinder. Gaskets, which stop leakage and they are inert on the hazardous content, are demanded.

At or ahead of the time of supply on the purchaser, the cylinder manufacturer will need to have all concluded certification files outlined in CGA C-11. The maker in the cylinders ought to keep the reviews expected by this subpart for 15 many years from the original check date from the cylinder.

(four) All cylinders have to be inspected from the magnetic particle or dye here penetrant strategy to detect the presence of quenching cracks. Any cylinder located to possess a quenching crack need to be turned down and may not be requalified.

(2) All functions performed by, or on behalf of, the individual whose identify or image appears as Section of the marking conform to demands specified in this component.

The completed containers should be uniformly and effectively warmth-handled prior to assessments. Warmth-remedy of containers of your authorized Assessment needs to be as follows:

Reheat cure is licensed for turned down cylinders. Having said that, Each and every reheat dealt with cylinder will have to subsequently go all of the prescribed tests. Restore by welding is just not authorized.

Materials should be discovered by any suited strategy besides that plates and billets for hot-drawn containers have to be marked with the warmth variety.

Cylinders need to be created making use of equipment and processes ample to make certain that Each and every cylinder developed conforms to the requirements of the subpart. No defect is permitted that is likely to weaken the concluded cylinder appreciably. A reasonably sleek and uniform floor finish is necessary. Heads may very well be connected to shells by lap brazing or might be fashioned integrally.

(ii) Taper threads have to be of a size not under that specified for American Normal taper pipe threads.

(iv) Permanent volumetric growth may not exceed 10 per cent of the whole volumetric enlargement at check pressure.