Threaded joint for steel pipes

Details Threaded joint for steel pipes Threaded joint for steel pipes

2011-08-16

2011-08-16

Dunwoody, Aaron (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S390000

Reexamination Certificate

active

07997627

ABSTRACT:
A threaded joint for steel pipes comprises a pin (1) and a box (2). The pin has male thread (11), a sealing surface (13), and a shoulder surface (14) located on the end face of the pin. Correspondingly, the box has female thread (21), a sealing surface (23), and a shoulder surface (24) which can mate or contact with the corresponding portions of the pin. The shoulder surface (14) of the pin (1) is provided at an end face of the pin. The sealing surface (13) of the pin (1) is located on a pipe end side near the male thread (11). A a nose portion (15) is provided on the pin (1) between the sealing surface (13) and the shoulder surface (14), the nose portion (15) being not in contact with a corresponding portion of the box (2).

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