European Journal of Applied Engineering and Scientific Research
Abstract
Author(s): Hafiz Abdul Ahad Qazi
High pressure line pipes are widely used in oil and gas sector for the transportation of natural gas, oil and other
petroleum products. Line pipe experiences high operating pressures in gas transportation that ranges from 200 to
1600 PSI depending on the size and length of the line pipe. For the safety point of view, to check integrity of line pipe
and before getting the line pipes used in the field, Hydrostatic test is used for verifying mechanical integrity of pipe
lines and is applied to check for leakages during hydrostatic testing. Burst test aims to evaluate the point of failure
of the line pipe and assess the structural integrity of a welded pipe. In present work, an experiment research work is
carried out to confirm weld and structural integrity of two API 5L PSL 2 X70 grade pipes manufactured by Helical
submerged arc welding pipe mill. Burst tests are conducted at pressure in excess of the Ultimate tensile strength of
the steel pipes and aimed to sustain the pressure as per API requirement. Both the pipes achieved the expected results.
