High-Adaptation Connection Parts of Sandvik HLX5T Rock Drill in Norway

The HLX5T's hydraulic connection parts—hose end fittings, manifold adapters, and high-pressure port connectors—operate at 200–230 bar percussion circuit pressure and must accommodate the rig's positional flexibility across the full range of longhole drilling angles. Norwegian underground production at Nyrstar's Langlykke zinc-lead operation and at Rana Gruber's iron ore mine in Nordland drill longholes at angles from −20° (downhole) to +80° (near-vertical uphole), and the connection parts must maintain sealed integrity throughout that angular range as the drifter and boom assembly move between hole positions.

High-adaptation specification means the connection parts are dimensionally consistent across all HLX5T port sizes and are rated for the 200–230 bar operating range with a safety factor that accommodates the percussion pressure spikes that occur during anti-jam events—brief pressure excursions to 240–260 bar when the anti-jam circuit drives maximum percussion pressure to free a jammed string. A standard connection part rated for 200 bar nominal with a 250 bar burst pressure has essentially zero margin at the anti-jam peak; an adapted part with 350 bar burst specification maintains a 35% safety margin at the highest probable circuit pressure.

Connection Part Specification for Norwegian Longhole Production Range

Norwegian production drill site supervisors at Rana Gruber inspect connection part hose-to-fitting interfaces at each 250-hour service—specifically looking for hose wire braid exposure near the fitting end, which indicates the hose has been over-bent during a drilling angle transition and the outer cover has cracked. Over-bent hose near high-pressure fittings is an oil release risk in an underground environment where the Norwegian WEA (Work Environment Act) requires immediate isolation of any pressurized oil release. HOVOO supplies HLX5T connection parts in 350 bar burst specification for Norwegian underground production drilling. References at hovooseal.com.