| 摘要 |
A method which, in attaching a stiffening ring (3b), a lock ring (11), and a stop ring (15) to the outer surfaces of steel pipes, corrects peaking which occurs in the pipe joint and these rings; a method which, in attaching a joint ring (2) to the inner surface of a steel pipe, corrects peaking which occurs in the joint ring (2), a method of producing a stiffening ring (3a) utilized in the above-mentioned joint; a construction for a packing (6) used in the joint; a method of laying steel pipes having the joint; and a seal surface construction for the joint. According to the pipe joint thus produced, manufacture of pipe joints in a factory can be unmanned and the field operation can be simplified. |
