These specifications establish standards of performance and quality for the design, manufacture, and fabrication of marine drilling riser equipment used in conjunction with a subsea blowout preventer (BOP) stack. This specification covers the following major subsystems in the marine drilling riser system:

• Riser tensioner equipment
• Flex/ball joints
• Choke, kill and auxiliary lines
• Drape hoses and jumper lines for flex/ball joints
• Telescopic joint (slip joint) and tensioner ring
• Riser joints
• Riser running equipment
• Special riser system components
• Lower riser adapter