CA2128061A1 - Pipe Coupling - Google Patents

Pipe Coupling

Info

Publication number
CA2128061A1
CA2128061A1 CA 2128061 CA2128061A CA2128061A1 CA 2128061 A1 CA2128061 A1 CA 2128061A1 CA 2128061 CA2128061 CA 2128061 CA 2128061 A CA2128061 A CA 2128061A CA 2128061 A1 CA2128061 A1 CA 2128061A1
Authority
CA
Canada
Prior art keywords
sealing
component
area
coupling
sealing area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2128061
Other languages
French (fr)
Other versions
CA2128061C (en
Inventor
Thomas Layton Blose
David Lloyd Britten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evraz Inc NA Canada
Original Assignee
Ipsco Inc Canada
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ipsco Inc Canada filed Critical Ipsco Inc Canada
Priority to CA 2128061 priority Critical patent/CA2128061C/en
Publication of CA2128061A1 publication Critical patent/CA2128061A1/en
Application granted granted Critical
Publication of CA2128061C publication Critical patent/CA2128061C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
    • F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

A pipe coupling or connection comprises a female coupling component and a mating male coupling component. Each component is matingly threaded for coupling engagement, and each is provided with an adjacent frusto-conical sealing surface. The sealing surface is provided with a controlled surface roughness, viz. very shallow fine surface variations, preferably formed as microgrooves at a pitch small relative to the pitch of the threads. The slope of the frusto-conical surface of the sealing area of the male component is slightly mismatched with that of the sealing area of the female component to simulate the bearing force vs. axial distance characteristic of shrunk-fit circular cylindrical sealing surfaces. The slight mismatch enables the sealing pressure to be above a design minimum throughout the entire sealing area yet higher at each end of the sealing area.
As the coupling is assembled, thread interference in the vicinity of the sealing surface lags the occurrence of interference between the sealing surfaces. Load threads are provided with negatively inclined load flank faces. Load thread interference values and tolerances are selected to enable the shrunk-fit cylindrical sealing surface simulation to be met over the range of tolerances provided. The envelope of the range of curves of interference vs. distance along the effective pin sealing surface area has a positive slope. The effective sealing area is at least about one-third and preferably at least about one-half of the available sealing area.
CA 2128061 1994-07-14 1994-07-14 Pipe coupling Expired - Lifetime CA2128061C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2128061 CA2128061C (en) 1994-07-14 1994-07-14 Pipe coupling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2128061 CA2128061C (en) 1994-07-14 1994-07-14 Pipe coupling

Publications (2)

Publication Number Publication Date
CA2128061A1 true CA2128061A1 (en) 1996-01-15
CA2128061C CA2128061C (en) 1998-06-16

Family

ID=4154004

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2128061 Expired - Lifetime CA2128061C (en) 1994-07-14 1994-07-14 Pipe coupling

Country Status (1)

Country Link
CA (1) CA2128061C (en)

Also Published As

Publication number Publication date
CA2128061C (en) 1998-06-16

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20140714