Construction industry of Iran imported items are: glass, timber flooring, lighting, paint, electrical and electronic fittings and accessories, lock, key hardware and aluminum for façade design. Manufacturers and suppliers are required to have ISO 9000 certification in order to export to Iran. European Union standards (EN, BSI, DIN, ANFOR, UNI, NNI, ON, IBN, IPQ, DS, NSF, SEE, SIS, NSAI, ELOT), North America National standards (ANSI, ASTM, AGI, API), Japan National Standard (JIS) and International Standards (ISO, CODEX, ITU, IEC) are also accepted in order to export to Iran. Further information is available from the Institute of Standards and Industrial Research of Iran. Construction industry
Symbols and conventions used in welding documentation Symbols and conventions used in welding documentation The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 "Welded, brazed and soldered joints -- Symbolic representation on drawings" and ISO 4063 "Welding and allied processes -- Nomenclature of processes and reference numbers". The US standard symbols are outlined by the American National Standards Institute and the American Welding Society and are noted as "ANSI/AWS". Due in part to the growth of the oil industry, this symbol set was used during the 1990s in about 50% of the world's welding operations. An ISO