| 摘要 |
<p>A fitting 10 for coupling with a pipe 16 in a sour environment includes a coupling body 12, a ring 14 positioned to fit over an end 42 of the coupling body 12, a main seal 30 formed on an inner surface of the coupling body 12, a transition section 24, 26 positioned adjacent the main seal 30, an inboard seal 32 formed on an inner surface of the coupling body 12, and an outboard seal 34 formed on an inner surface of the coupling body 12. The transition section 24, 26 is formed as an indentation on the inner surface of the coupling body 12 and has a first portion with a first diameter and a second portion with a second diameter, with the first diameter being greater than the second diameter. When the ring 14 is fitted over the at least one end of the coupling body 12 via force, the ring 14 and coupling body 12 apply a coupling force to the main seal 30, the outboard seal 34 and the inboard seal 32 to connect the pipe 16 to the coupling body 12 in a non-leaking manner. The fitting 10 is made of a low alloy carbon steel material. The main seal 30 includes a first tooth 50, a second tooth 52, and a third tooth 54.</p> |
