Apparatus made primarily from metal for use in the construction, maintenance and repair of oil and gas installations and pipelines, namely, metal seal units for use in repairing transmission and distribution pipelines; metal tubing, liners and casings, couplings, seals, locking and gripping apparatus, flange packers, and test tools being metal valves, other than part of machines, all for use in oil and gas installations; parts and fittings for the aforesaid

Liquid separation and filtration machinery, namely, water and oil treatment machinery, oil and water filtration and separation machinery, and oil concentration machinery