Fittings

In fluid transmission engineering, fittings are essential for directional adjustments, branch derivation, pipeline-to-valve integration, and cross-sectional transitions. Mechanical strength and sealing integrity at fitting joints must fully match pipe capabilities to prevent pressure drops or leak paths over the network design life.

The launched Caspian Sanat ZAAL fittings catalog encompasses polyethylene compression, butt-fusion, and electrofusion fittings, clamp tapping saddles, corrugated couplers, and steel or ductile-iron backing rings, supporting municipal water, pressure irrigation, gas distribution, and gravity drainage networks.

Fittings within this catalog are structured across three primary jointing mechanisms: mechanical compression and clamp saddles (requiring no heat or fusion machinery), butt-fusion and electrofusion (forming fully homogeneous molecular welds), and flanged joints using backing rings to connect pipelines with cast-iron valves and flow control equipment.

Joint selection is guided by working pressure classes, fluid safety requirements, site access to welding equipment, and nominal pipeline diameters.

To guarantee safe operation, pressure ratings and dimensional specifications of fittings must strictly align with the adjoining pipe. In polyethylene welded fittings, pipe-grade polymer and SDR matching prevent stress concentrations across weld seams.

In gravity corrugated networks, couplers and elastomeric ring seals are engineered to absorb differential ground settlement along the trench bed without compromising watertight integrity.