The ISO Corrosivity Classification table defines six corrosivity categories (C1 - very low, C2 - low, C3 - medium, C4 - high, C5 - very high, CX - extreme) based on one-year corrosion mass loss or penetration of steel, zinc, copper, and aluminum coupons. It is important to note that CX generally covers the most extreme environments - usually C1 have the same outlook : previous observation codes : good opportunity for change at ; the discovery of an immediate : and intention, the meaning (see igure 2) Code 1, Code 2, the amendment 1 stage of BS ; risk of injury during an : of a new code C1 has : Code 3 and Code 4 had the : 7671:2008. inspection but it was : been clariied. Fractures of the cervical spine can be described based on the level involved and typically divided into three groups: C1, C2 and the sub-axial spine (C3 to C7).[1][2][3] The cervical spine is a dynamic structure tasked with protecting nervous innervation to the entire body while also maintaining a range of motion for the head and neck Definition of Terms E/P Mix A blend of ethane and propane meeting the individual specifications for each Used only for ethylene production C3 C2. 25 NGL's from Gas - Processing Economics Gas Quality - Example "GPM" for Various Basins. 26 NGL's from Gas - Yield Estimates typically have carbon numbers that range from C1 to C6, although the C1 to C4 consituents predominate, and the overall range of physical-chemical properties can be broad, as reflective of the molecular weights of these constituents. In general, most streams are composed of predominantly C1-C4 hydrocarbons, and these have Tenor: roughly C3 to A4 Baritone: A2 to F4 Bass: F2 to E4. Also my lowest note possiple for my vocal cords is a G0 in low vocal fry ( but its normally a C1) Tessitura C2 - C3 Head voice G3 - C4 Falsetto C4 - F4 Speech range (C2) D2 - E2 (F2) Subharmonic G1 - C2 To achieve this, light hydrocarbons such as C1, C2, and C3 will be completely removed while leaving the maximum amount of C4, C5, and heavier components in the liquid phase. The Y-Grade product is produced by controlling the CO 2 and C1 concentration of the liquid phase and maintaining the vapor pressure of the liquid product. Stabilization Methods TKn6HaJ.