Steel Tube Handbook - 2018

74 Injection tubes Tubes for injection system of Diesel engines are produced upon agreement. (ČSN 42 6718, DIN 73000, ISO 8353-1, steel grades 12015, St 30Al, St 30Si). Tubes, galvanized with PVC coating For the plastic coating of the tubes the following assortment range is used: Precision seamless steel galvanized HPL pipes (page 79). Grades: E 235+N, according to DIN 10 305-1 or 4, other grades are possible by arrangement. Dimensions of pipes with PVC coating Tubes are supplied in the dimension 6.0 x 1.0 mm, other dimensions are possible by arrangement. Lengths are 6 000 mm and are supplied in bundles or in a flat condition. Marking tubes with PVC coating Each meter of a tube is marked as follows, font size 2 mm: CUSTOMER - 6 x 1 SEAMLESS CNG ISO 15500 GASTEC approval 122779/1 110R-000130H1 Packaging of the tubes with PVC coating Bundles of tubes diameter from 200 to 300 mm, are packed in cardboard boxes and shipped on a pallet, straight tubes are tied in bundles with steel tape, underlined with paper or plastic. Testing of tubes with PVC coating The tubes are eddy current tested according to EN 10246-3 standard. Properties of the PVC coating This is the material free of lead (Pb) and cadmium (Cd), the surface color is white, matt. Operating temperature between -55 and 135 ° C, in case of fire coating is flame-retardant. The protective layer PVC does not corrode and is well resistant to chemicals. Tubes are designed for gas distribution in CNG-powered cars. Distribution of gas in vehicles with CNG consists of high and low pressure parts. High pressure parts connect the pressure vessel portion in which the gas pressure reaches 22 MPa with filling connection and pressure regulator located in the engine compartment. Special tubular sections Special sections for power transmissions for the agricultural industry are manufactured in various sections (lemon, star, trian- gular) in accordance with international and European standards. Special tubes with cylindrical or octagonal outside sections with rifling inside. The inside rifling is produced directly by lami- nation during the cold drawing. These tubes are manufactured in carbon steel or alloyed steel grades.