FEA HISC stress analysis

FEA HISC stress analysis

HISC (Hydrogen Induced Stress Cracking) failure is local embrittlement caused by hydrogen in combination with internal stresses within a ferritic-austenitic duplex stainless steel in subsea equipment with cathodic protection. It is a non ductile failure caused by the interaction of cathodic protection and stresses.
Additional design checks are required to prevent HISC failure modes and ensure safety margins are met over the design life of any component. Our engineering team at SDEA Solutions has extensive experience in providing technical support for HISC assessment to component manufacturers in the oil and gas sector.
FEA based methods are used together with design limits from different industry standards in order to assess design sufficiency and identify any necessary modifications. SDEA engineers are experienced in applying the DNV RP F112 which is the industry standard for ensuring that the probability of Hydrogen Induced Stress Cracking failure is negligible and that the stress state is below prescribed safety levels.
At SDEA Solutions, our team has developed a methodology combining FEA simulation tools together with industry standards to predict the safety margin for any design exposed to potential HISC failure. We work with the client through the whole process from load definition to final checking of the stress levels and give a precise answer on the validation of the design.
Contact us to find out more about Hydrogen Induced Stress Cracking failure prevention and we will be happy to assist you.