ISO 10462:2013 pdf free

ISO 10462:2013 pdf free.Gas cylinders一Acetylene cylinders一Periodic inspection and maintenance
Each cylinder shall be cleaned and have all loose coatings, corrosion products, tar; oil or other 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 cylinderwall.
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 6.1 may be carried out at this stage.
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.
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. These plugs, which are situated below the neck filter or gauze arrangement, shall be left intact and not removed for the purpose of the visual inspection provided the wooden plug is in the correct position permitting the measurement of the top clearance in accordance with the manufacturer’s instructions. If during a previous inspection the wooden plug was tampered with, removed by mistake or is not in the correct position, it shall be replaced with a new one in accordance with the porous material manufacturer’s specification.
Special care shall be taken when removing filters or packing material. Some restrictions at the neck can hold residual pressure that, if suddenly released, can blow the filter out with some of the porous material and cause injury.ISO 10462 pdf download.