Industry has experienced subsea equipment failures with bolts. The BSEE link highlights the work conducted industry related to such failures.
Bolting integrity and competency of technicians for all subsea and surface application flanges has been raised as a major issue in recent years. Understanding the quality of bolting materials and associated torque preloads required to meet pressure and tension /bending limits are essential to any flange connection. Improved quality, reliability , integrity and Safety through Training and improved competency.
ASME recently developed a “Training” program for bolting and can be referenced at :
The Training program may offer additional quality assurance to achieving bolt integrity to your next project. Both links offer access to value resource data for this topic.