PERMANENT JOINT FOR LINED TUBES Russian patent published in 2002 - IPC

Abstract RU 2187734 C1

FIELD: pipe line transport; oil producing and petrochemical industries; erection of pipe lines working under pressure of up to 20 MPa. SUBSTANCE: permanent joint includes pipe, polymer envelope, protector, end-piece and edge. End-pieces are mounted at projection at butt of tubes by approximately 1.5 to 2 mm. Bevel angle is equal to 30 deg. In connecting tube with the aid of such joint, welding is effected without clearance between projections. EFFECT: reduced amount of welding material; improved quality of weld seam; enhanced durability of lined surface. 1 dwg

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RU 2 187 734 C1

Authors

Safonov E.N.

Akhmetgaliev R.Z.

Kalimullin A.A.

Shmulinzon A.R.

Mamin R.N.

Dates

2002-08-20—Published

2001-02-22—Filed