Pipes & Fittings

This Pipes & Fittings category is a compact listing of line hardware: Swagelok tube fittings and quick-connects for instrument tubing, a Victaulic grooved pipe coupling, and Cooper Crouse-Hinds conduit bodies, flexible couplings and sealing fittings for electrical conduit in hazardous areas. Seven Star LLC supplies these items to instrument, piping and electrical contractors in Oman.

Nine products are listed at present. The range is growing, and other sizes and part numbers from the same manufacturers can be sourced on request.

Tube fittings, grooved pipe couplings and conduit fittings

Swagelok tube fittings are two-ferrule compression fittings that grip and seal on the outside of instrument tubing without threading or welding. They are a usual choice for impulse lines, analyzer sample lines and instrument air. The QC Series quick-connects allow a line to be coupled and uncoupled by hand, for example on portable equipment and sample cylinders. The Victaulic Style 107N is a rigid coupling for grooved-end pipe; grooved joints are common on fire protection, chilled water and utility piping because they are assembled with bolts instead of welding. The Cooper Crouse-Hinds items belong to rigid conduit systems: Condulet outlet bodies give pulling and access points, flexible couplings absorb movement and vibration at equipment connections, and EYS sealing fittings are filled with sealing compound to stop gases and flames passing along the conduit.

Hazardous-area rules for conduit sealing fittings

In classified areas the conduit system is part of the explosion protection. Fittings are marked for the Class, Division and gas Group under North American practice, or carry ATEX and IECEx marking for Zone systems, and the marking must match the area classification drawing. The sealing compound and fiber specified by the manufacturer have to be used with the fitting.

What to tell us when asking for fittings

For tube fittings: tube outside diameter, fractional or metric, the end connections and thread type, body material and the fitting shape. For conduit fittings: trade size, thread standard (NPT or metric), body material and the required hazardous-area marking. For grooved couplings: pipe size and standard, gasket material and the fluid. A manufacturer part number removes all doubt, and we check it against the manufacturer documentation for buyers across the GCC.