1.1 This part of ISO 9330 specifies the technical delivery conditions for longitudinally welded tubes of circular cross-section, made of austenitic stainless steel, which are applied for pressure and corrosion resisting purposes at room temperature, at low temperatures or at elevated temperatures. These tubes are intended for pressure purposes, for example, for the construction of pressure vessels, chemical plants and steam-generating equipment and for interconnecting pipe work. Tubes manufactured in accordance with this part of ISO 9330 may have specified room temperature properties, specified low temperature toughness properties and specified proof-stress values at elevated temperatures, as appropriate to the service for which they are intended. The requirements of appropriate International Standards covering applications (e.g. ISO 1129, ISO 2037, ISO 6759, ISO 7598) and relevant national legal regulations shall be taken into account by the user. For boilers and pressure vessels, ISO/R 831 and ISO 5730 are available. NOTES 1 The word "tube" is synonymous with "pipe". 2 This part of ISO 9330 can also be used as a basis for the manufacture of tubes of non-circular section. In this case, the values quoted in this part of ISO 9330 for chemical analysis and mechanical properties are applicable. All other requirements are by agreement between the purchaser and manufacturer. This part of ISO 9330 does not cover a) casing, tubing, drill pipe and linepipe for use by the oil and natural gas industries; and b) tubes for the transport of gas, water and sewage. 1.2 For the general technical delivery requirements, see ISO 404.