Abstract: The art has experienced difficulty obtaining “sound” welds with high-nickel welds above the second pass. Particular problems are tension anomalies and sub-optimal interweld pass fusion at higher order passes of the weld wire, along with undesirably high heat levels transferred to the workpiece. The inventors have discovered that ductile iron-to-ductile iron welds can be reliably formed at mission-critical junctures by compensating for the brittle nature of the heat affected zone through enhancing ductility of the weld itself. The present invention provides in continuing part for a highly durable weld without soundness problems such as tension anomalies, multilayer fusion imperfections, or pinholes; and a method of forming such a weld. The weld is created using high nickel weld wire (filler metal or consumable electrode, or both) welded in a pure inert gas (or mixture of pure inert gasses and even reducing gasses).

Abstract: A locking segment for use in connecting two lengths of pipe has a radically extending heel that serves as a rotational brake. By mating the brake into an annular trough, that is, by placing it between two walls, the rotation of the segment can continue only until points on the brake mure between the two walls. Rotation of the segment in response to increasing thrust pressures can thereby be arrested before the rotation causes the segment to bear on the spigot with a radically inward force great enough to penetrate the spigot.

Abstract: A non-destructive testing method and apparatus for determining the microstructure of ferrous metal objects, such as cast iron pipe. A sonic wave is induced into the metal object by magnetostriction. A sensor assembly captures the acoustic energy induced in the metal object and sends a signal output to signal processing electronics. The electronics amplify the signal. The amplified signal is then captured by the data acquisition system and analyzed by the data analysis system. The data analysis system may calculate the energy of the acoustic wave or calculate the time from the initial induction of the sonic wave to the Villari reversal point to determine nodularity of the metal object.

Abstract: A device for holding nested bell and plain end push on joint pipes in a fixed position utilizing a novel frame work of simple members fastened firmly together. The inner pipe may be held concentrically or eccentrically with respect to the outer pipe.Padding may be added to protect inside coatings, and safety strapping offers added security that allows an abrasion resistant sheet to be held in place until disassembly occurs.