This International Standard specifies requirement sand gives recommendations for the design, materials , construction, testing, operation, maintenance and abandonment of pipeline systems used for transportation in the petroleum and natural gas industries. It applies to pipeline systems on land and offshore , connecting wells , production plants , process plants , refineries and storage facilities , including any section of a pipeline constructed within the boundaries of such facilities for the purpose of its connection . the extent of pipeline systems covered by this international standard is illustrated in Figure1.