Joint Lock Ring


The market currently struggles to obtain quality welds when joining two pieces of cement lined, beveled end steel pipe. The initial welded root pass directly contacts the cement lining causing contamination of the weld. The result is that 100% of the pipe wall strength cannot be effectively utilized and the joint will not allow a quality mechanical or nondestructive test of the completed weld joint.

Weld Joint - problem

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.


The Joint Lock Ring system is a specific solution for joining cement lined pipe through the welding process. The joint lock ring technology incorporates a steel ring, internally coated with a protective barrier. The ring, machined of the same material as the pipe, is inserted into each end of the cement lined pipe joint creating a steel to steel welding surface. This surface allows for full weld penetration utilizing optimum wall thicknesses potentially reducing overall project costs.

Weld Joint - solution

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.