Pipe restraints in the nature of metal pipe fittings, for ductile iron, steel, and PVC piping systems; metal harnesses in the nature of metal pipe fittings, metal ball joints, and metal and flexible metal expansion joints, all for pipelines; metal retainer glands in the nature of pipe connectors used in mechanical pipe restraining joints for connecting ends of liquid conduit pipe together; metal flange adapter assemblies comprising metal gasket rings, restraint ring gaskets, and screw driven wedges in the nature of restraint rings incorporating wedges that grip pipes, for use on plain end pipe; coated metal joint restraints in the nature of metal pipe fittings, coated metal pipe couplings, and coated metal pipe gaskets, all for ductile iron, steel, or PVC piping systems