Standard designs include “O” ring energised Polyurethane seals and an HNBR equivalent. The Polyurethane can be supplied in 92A or 50D hardness grades.
The riser seals are located between several sections of pipe on the riser system which stretches from the surface of the water to the ocean floor and carries drilling fluid from the well to the vessel.
The seals can be manufactured in a variety of materials and designs depending on the pressure and temperature rating including a spring seal design which has a working pressure rating of 15,000 psi and can be supplied with a stainless steel, Inconel or PEEK spring.
Please follow link for more information on Riser SealsBack to Pressure Control