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ISO 10462-2013 pdf free download
ISO 10462-2013 pdf free download.Gas cylinders — Acetylene cylinders — Periodic inspection and maintenance
Bouteilles a gaz — Bouteilles d’acétylène — Contrôle et entretien périodiques.
The absence of a positive pressure reading does not clearly indicate the absence of gas under pressure due to the possibility of a blocked valve (for information, see Iso 25760). In case of any doubt regarding the efficiency of the depressurization, the cylinder shall be weighed.
If a cylinder weighs more than the tare stamped on the cylinder, it is not always a clear indication of the presence of gas under pressure. Some relevant factors that should be considered are a possible excess of solvent or Contamination with water, etc.
If a cylinder weighs less than or equal to the stamped tare, it is not always a clear indication of the absence of gas under pressure. Some relevant factors that should be considered are a possible solvent shortage or external corrosion causing a loss of cylinder shelL
5.2 Preparation for external visual inspection
Each cylinder shall be cleaned and have all loose coatings, corrosion products, tar, oil or ot her foreign matter removed from its external surface by a suitable method, e.g. by brushing, shot blasting (under closely controlled conditions to ensure that there is no leakage of acetylene into the brushing or shot- blasting cabinet), water jet abrasive cleaning, chemical cleaning. Care shall be taken at all times to avoid damaging the cylinder and pressure relief devices (where fitted) or removing excess amounts of cylinder wall.
Shot blasting is a process utilizing iron shot of various sizes. It is not to be confused with or referred to as sand blasting, grit blasting or other more aggressive processes that remove a significant amount of the base metal or metallic coatings. These more aggressive processes should not be used.
The external visual inspection in accordance with Lmay be carried out at this stage.
5.3 Removal of the valve
The valve shall be removed safely. For information, see ISO 25760.
The cylinders should not be left open or without valves longer than necessary for the inspection.
5.4 Removal of neck/core hole filters
Acetylene cylinders usually contain neck filters/core hole packings consisting offilter or metallic gauze and felts. Neck filters and packing materials placed between the top of the porous material and the base of the valve stem shall be removed, as appropriate, to enable an adequate inspection of the porous material in accordance with the inspection requirements of the porous material manufacturer For various types of neck filters/core hole packings, see Annex A.
Some porous material manufacturers equip acetylene cylinders containing a monolithic porous material with wooden plugs, which form an integral part of the porous material.ISO 10462-2013 pdf free download.
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