Joint Lock Ring Technology
Weld Joint Cutaway View
Pipe Wall
Weld Zone Contamination
Cement Lining
Gasket
•Solution – The Joint Lock Ring Technology welded ID wall seal type creates a steel to steel welding surface eliminating the potential for weld contamination. Full weld penetration optimizes pipe strength and allows for complete non-destructive and mechanical testing of the joint.
•Problem – The initial weld root pass contacts the cement lining contaminating the weld. A contaminated weld reduces the structural strength of the pipe and will not allow for complete non-destructive or mechanical testing of the weld joint.
Pipe Wall
Clean Weld Zone
Lock Ring
Lock Ring
Cement Lining
Joint Lock Ring Technology Welded ID Wall Seal Type
In-Plant – Manufacturing Process for Joint Lock Rings
Example shown:
Joint Lock Ring Assembly
Welded ID Wall Seal Type
For Secondary Fluid Containment
This completes the In-Plant Lock Ring Manufacturing Process.
The following demonstration will take us through the process used for manufacturing a pair of Joint Lock Rings for Secondary Fluid Containment.
The face O-Ring restricts the internal fluid from reaching or affecting the weld zone.
A pair of rings are machined from carbon steel to specific tolerances based on the mainline pipe size/wall thickness in which they will be inserted.
Grooves are machined when fitted with Viton O-Rings.
The internal surfaces of the rings that will contact service fluid are coated with a wear resistant, non conductive ceramic.
A Heat resistant Viton fluorocarbon rubber O-Ring is then fitted in the machined groove.
Joint Lock Ring Technology Welded ID Wall Seal Type
In-Plant – Lock Ring Insertion Process
Joint Lock Ring is positioned into pipe end.
This completes the In-Plant Lock Ring Insertion Process.
The tool’s Press Plate is attached to the Clamp using 4 Bolts.
The 4 Bolts are tightened to press the ring into final position.
The same procedure is performed on the opposite end.
A 40' section of service pipe is first prepared by chamfering and sanding smooth the internal weld seam at both ends.
The assembly tool is clamped onto the end of the pipe.
A Welded Pressure Seal is applied to the pipe ID wall and the Joint Lock Ring.
This end of the service pipe receives a Joint Lock Ring with a flat, machined face.
Specified bevel is applied to both pipe ends
Joint Lock Ring Technology Welded ID Wall Seal Type
In-Plant – Cement Lining Process
With Joint Lock Rings now inserted, the 40' pipe assembly is then sent through the cement lining process.
Pipe is spun.
Slurry is injected into pipe.
Hard plastic caps are placed on each end of the pipe. The pipe is cured based on product specifications. The completed Joint Lock Ring System is now ready for shipping.
Finished internal cement lining is the same thickness as ID of the rings.
The slurry is set against the pipe wall through centrifugal force creating a dense lining.
Joint Lock Ring Technology Welded ID Wall Seal Type
In-Plant – Welded Fitting Manufacturing & Assembly Process
MANUFACTURING
INSTALLATION
CEMENT LINING
The following demonstration will take us through the
Joint Lock Ring Assembly process, fitted to a 90 ° Elbow.
A protective coating of White Alumina ceramic is plasma applied 16 to 20 mil thick to the internal surfaces that will contact the fluid.
A hard plastic cap is placed on each end of the fitting and finish cured based on product specifications. The fitting is now ready for shipment to customer.
Rings are seal pass welded on the backside of the rings to secure them in place.
Weld Fitting is abrasive blasted on the ID and cement lining is applied by a hand troweling process.
Finished internal cement is the same thickness as the ID of the ring.
Rings are installed into each end utilizing the Joint Assembly Tool.
A Pair of Weld Fitting Rings are machined to specific dimensions per job requirements.
Joint Lock Ring Technology Welded ID Wall Seal Type
Field Assembly Process – Joining Full Length Pipe Sections Using Lock Rings
The second half of the Joint Assembly Tool is attached to the 2nd section of pipe.
The 4 bolts are then tightened to draw the two pipe sections together, compressing the O-Ring between the two Lock Rings.
The pipe is tack welded in four places to secure the joint alignment and maintain O-Ring compression.
The tools are removed and the full penetration joint weld is completed.
One section of pipe is set on jack stands or dunnage.
Half of the Joint Assembly Tool is attached to the end of pipe.
A second section of pipe is set on jack stands or dunnage with the pipe alignment plate properly positioning the two pipe ends for fit up.
The field assembly process is now complete.
The following demonstration will take us through the
field assembly process used for joining 2 full length pipe sections utilizing preassembled Joint Lock Rings.
WELD LOCK JOINT
40' PIPESECTION #140' PIPESECTION #2
Joint Lock Ring Technology Welded ID Wall Seal Type
Field Assembly Process – Joining Cut to Length Cement Lined Pipe Segments Using Lock Rings
The 4 bolts are tightened to press the ring into final position.
The Joint Assembly Tool is clamped onto the OD of the end of the cut pipe.
The internal cement is cut back 2 ½" from the end.
A section of cement lined pipe is cut to desired length and beveled.
Half of the Joint Assembly Tool is attached to the end of cut pipe.
A second section of pipe is set on jack stands or dunnage connecting with the pipe alignment plate properly positioning the two pipe ends for fit up.
The second half of the Joint Assembly Tool is attached to the 2nd section of pipe.
The 4 bolts are then tightened to draw the two pipe sections together, compressing the O-Ring between the two Lock Rings.
Pipe is tack welded in four places to secure the joint alignment and maintain O-Ring compression.
The tools are removed and the full penetration joint weld is completed.
The Pipe is now ready to be joined to a full length pipe section or a weld fitting.
A 1" wide cement patch is made behind the ring to the existing cement.
A Joint LockRing is inserted into the end of pipe and the Assembly Tool’s Press Plate is attached using 4 bolts.
This completes the field assembly process for joining a cut section of a cement lined pipe to a full section of pipe.
The Assembly Tools are removed and a Welded Pressure Seal is applied to the pipe ID wall and the Joint Lock Ring.
The following process is used when the onsite contractor needs to field adjust his piping and cut a cement lined pipe length that will be joined to a full length pipe or fitting.
FIELD CUT LENGTHOF CEMENT LINEDPIPE40' LengthJOINT LOCK RINGSYSTEM SECTION
Joint Lock Ring Technology
Joint Lock Ring Field Assembly Kit - Cement
In field pipe length adjustments are a necessary part of many pipe installations. When joining cut cement lined pipe segments using our Joint Lock Ring Technology, a field assembly kit is supplied to provide all of the necessary components for installing the lock rings correctly.
The kit consist of the following components:
• 1 Joint Lock Ring with O-Ring attached
• 1 Set of Assembly Tools w/Bolts (not shown)
• G8 Cement ID Patch Kit
• ID Sand Finish & Bevel Tool
• Lock Ring Installation Lubrication Packet
• Additional Set of Loose O-Rings
Assembly Tools