... "-12" Executive Tube Standard: JIS G3461 Carbon steel boiler and heat-exchanger tube Product particular communication: 1) ... stenciling as required; 5) Rust prevention treatment, such as: Immersion oil, lacquer, passivation, phosphating, etc; 6) Plastic plugs ... , Nondestructive Test, Hydrostatic Test; 9) Main Applications: Boiler and Heat Exchanger, Hydraulic and Petrochemical Purpose, etc. Commercial ...