Fusion can either be autogenous or with the addition of a filler material.
Oil or grease should never be allowed to come into contact with oxygen cylinders as an inflammable mixture will be formed, which may ignite spontaneously. Cylinders must always be stored upright and away from high temperatures. Storage as for acetylene, a fuel gas. With propane being heavier than air it can flow easily in still air some considerable distances therefore care must be exercised when using this gas. Equipment Pressure Regulators Regulators should always be treated as delicate, precision instruments and must not be subject to sudden pressures or knocks.