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A boss for use with a vessel is disclosed. The boss includes a first component adapted to be formed in an opening of the vessel, wherein the first component includes a first coupling element, and a second component including a second coupling element, wherein the second coupling element engages the

A boss for use with a vessel is disclosed. The boss includes a first component adapted to be formed in an opening of the vessel, wherein the first component includes a first coupling element, and a second component including a second coupling element, wherein the second coupling element engages the first coupling element to secure the second component to the first component, and wherein a liner of the vessel is disposed therebetween.

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1. A boss for use with a vessel, the boss comprising: a first component including a neck portion and a shoulder portion, the first component adapted to be formed in an opening of the vessel, wherein the first component includes a first coupling element; anda second component including a neck portion

1. A boss for use with a vessel, the boss comprising: a first component including a neck portion and a shoulder portion, the first component adapted to be formed in an opening of the vessel, wherein the first component includes a first coupling element; anda second component including a neck portion and a shoulder portion, the neck portion including a second coupling element, wherein the second coupling element is adapted to engage the first coupling element to secure the second component to the first component,wherein a space exists for receiving a liner of the vessel when the first coupling element is engaged with the second coupling element, the space located between a part of the neck portion of the first component and a part of the neck portion of the second component and between a part of the shoulder portion of the first component and a part of the shoulder portion of the second component. 2. The boss according to claim 1, wherein the first component includes at least one of a channel for receiving a first sealing element and a protrusion for engaging a vessel liner to minimize radial elongation and movement of the vessel liner. 3. The boss according to claim 2, further comprising a first sealing element disposed in the channel of the first component. 4. The boss according to claim 1, wherein the second component includes at least one channel for receiving a second sealing element. 5. The boss according to claim 1, further comprising a second sealing element disposed between the first component and the second component. 6. The boss according to claim 1, wherein each of the first coupling element and the second coupling element includes a helical thread for coupling the first component to the second component. 7. The boss according to claim 1, wherein the first component and the second component cooperate to form a passage, the passage providing fluid communication between a pressure chamber formed in the vessel and an environment outside the vessel. 8. The boss according to claim 1, wherein the second component is adapted to receive a utility device. 9. A pressure vessel for storing a fluid, the pressure vessel comprising: a first component adapted to be formed in an opening of the vessel, the first component having a shoulder portion and a neck portion, wherein the neck portion includes a first coupling element;a second component having a shoulder portion and a neck portion, the neck portion including a second coupling element, wherein the second coupling element engages the first coupling element to secure the second component with the first component; anda liner disposed around the neck portion of the first component, wherein a portion of the liner is disposed between a part of the neck portion of the first component and a part of the neck portion of the second component and between a part of the shoulder portion of the first component and a part of the shoulder portion of the second component. 10. The vessel according to claim 9, wherein the first component includes at least one of a channel for receiving a first sealing element and a protrusion for engaging a vessel liner to minimize radial elongation and movement of the vessel liner. 11. The vessel according to claim 10, further comprising a first sealing element disposed in the channel of the first component. 12. The vessel according to claim 9, wherein the second component includes at least one channel for receiving a second sealing element. 13. The vessel according to claim 9, further comprising a second sealing element disposed between the first component and the second component. 14. The vessel according to claim 9, wherein each of the first coupling element and the second coupling element includes a helical thread for coupling the first component to the second component. 15. The vessel according to claim 9, wherein the first component and the second component cooperate to form a passage, the passage providing fluid communication between a pressure chamber formed in the vessel and an environment outside the vessel. 16. The vessel according to claim 9, wherein the second component is adapted to receive a utility device. 17. A method for molding an inner liner of a pressure vessel including a boss, the method comprising the steps of: providing a first component of the boss adapted to be formed in an opening of the vessel, the first component having a shoulder portion and a neck portion, wherein the neck portion includes a first coupling element;securing a parison around the neck portion of the first component;molding the parison into a pre-determined formation, thereby forming a hollowed liner of the vessel;coupling a second component of the boss to the first component, wherein the second component includes a neck portion and a shoulder portion, the neck portion including a second coupling element for engaging the first coupling element to secure the second component to the first component;wherein the liner is disposed around the neck portion of the first component, and a portion of the liner is disposed between a part of the neck portion of the first component and a part of the neck portion of the second component and between a part of the shoulder portion of the first component and a part of the shoulder portion of the second component. 18. The method according to claim 17, wherein the first component includes at least one of a channel for receiving a first sealing element and a protrusion for engaging a vessel liner to minimize radial elongation and movement of the vessel liner. 19. The method according to claim 17, wherein the second component includes at least one channel for receiving a second sealing element. 20. The method according to claim 17, further comprising the step of providing a sealing element disposed between the first component and the second component.