A gasket includes: a spiral wound gasket; a first O-ring member located inner side of the spiral wound gasket; a second O-ring member located outer side of the spiral wound gasket; a first core spring located inside the first O-ring member; a second core spring located inside the second O-ring member; a first jacket formed with an opening portion and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member inside thereof through the opening portion; a second jacket formed with an opening portion at the one end thereof and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member, and the first jacket inside thereof through the opening portion; a first sealing layer being formed on the first jacket; a second sealing layer to cover the first sealing layer; and a third sealing layer being formed on the second jacket.

A gasket includes: a spiral wound gasket; a first O-ring member located inner side of the spiral wound gasket; a second O-ring member located outer side of the spiral wound gasket; a first core spring located inside the first O-ring member; a second core spring located inside the second O-ring member; a first jacket formed with an opening portion and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member inside thereof through the opening portion; a second jacket formed with an opening portion at the one end thereof and accommodating the spiral wound gasket, the first O-ring member, and the second O-ring member, and the first jacket inside thereof through the opening portion; a first sealing layer being formed on the first jacket; a second sealing layer to cover the first sealing layer; and a third sealing layer being formed on the second jacket.

A torque retention arrangement for a flange bolt connector for use with pipe. The torque retention arrangement a carrier body and a plurality of springs. The carrier body can include a plurality of spring holes equi-spaced around a circumference. A plurality of springs in a vertical stack can be mounted in each of the plurality of spring holes in the carrier. Each spring is in a convex orientation in a pre-torque condition and is in a planar orientation in a post-torque condition.

A multifunctional gasket with compression and rotation control comprises annular sealing element(s) with specific stiffness, geometry, tightness and compressibility properties and uniquely shaped compression element(s) with variable thickness and specific mechanical properties. The gasket is designed to seal under static and dynamic fluid pressure loading for a wide range of sizes and with severe thermal differential temperatures and static and dynamic external loads. This gasket is able to significantly increase the pressure rating for leakage, ability to resist external forces and moments, resistance to thermal differentials and operating reliability of flanges in accordance with published standards, as well as enable the more efficient design of special flanges for demanding operating conditions. The gasket design also allows for easier, faster and more uniform assembly of the joint.

An assembly comprising: a first tube defining a first surface; a second tube defining a second surface, wherein the second surface is configured to contact the first surface at an interface; a fixation mechanism comprising: a first split flange disposed around the first tube; a second split flange disposed around the second tube; and one or more springs coupled to the first split flange and the second split flange, wherein the one or more springs are configured to transfer a relative force between the first tube and the second tube and towards the interface, and wherein the second split flange is configured to be disposed between the interface and the one or more springs.

An assembly comprising: a first tube defining a first surface; a second tube defining a second surface, wherein the second surface is configured to contact the first surface at an interface; a fixation mechanism comprising: a first split flange disposed around the first tube; a second split flange disposed around the second tube; and one or more springs coupled to the first split flange and the second split flange, wherein the one or more springs are configured to transfer a relative force between the first tube and the second tube and towards the interface, and wherein the second split flange is configured to be disposed between the interface and the one or more springs.