Most sensitive part of the manufacturing process is selection of machineries, area of quality control and highly trained personnel. Chlorine Cylinder and their applications in fabrication of gas cylinders by the combination of submerged Arc & Metal Inert Gas Welding using gas mixture of Argon & Co2 produced best quality welded cylinders. All cylinders during fabrication have to pass through different stage of inspection. The sequence of test after heat treatment provides the consistency of quality. Aqua services are massed with its own mix formulation to form Monolithic calcium silicate (Porous Mass) after reaction and drying. The pass through chemical testing of slurry of each batch to ensure non-availability of free space not more than the specified quantity.