The integrity of pipeline is compromised when corrosion develops. The corrosion referred to radial interacting corrosion which is happening internally and externally of pipeline wall at the same time. This paper investigates the effect of corrosion in the radial direction towards the failure burst pressure. Four types of corrosion defect arrangement were developed from literatures and tested experimentally to compare the failure burst pressure of the pipes with radial interacting corrosion and external corrosion. The external corrosion failure burst pressure was calculated theoretically by using Modified ASME B31G standard. The results of the failure burst pressure have shown that pipes having radial interacting corrosion fails at a lower burst pressure compared to the pipes having only external corrosion defect. © Published under licence by IOP Publishing Ltd.