In short: on a high-cycle port crane the wire rope is the most frequently replaced part, and the sheave it runs over decides how long it lasts. A machined, welded sheave is lighter than cast iron, lowers inertia on the rope and wears evenly. BTGC supplies Gosan sheaves, hook blocks and couplings for ports, steel mills and mega-projects.

Saudi ports at Jubail, Ras Al Khair, Dammam and Yanbu handle containers, phosphate, fertilizer and steel around the clock. Each crane cycle runs the hoist rope over several sheaves; a container crane can make a thousand cycles a day. Rope changes are planned downtime, and an early rope change is lost throughput.

What kills wire rope

• Bending fatigue at each sheave; a sheave too small or a groove with the wrong profile bends the wires too sharply.

• Inertia loads when a heavy cast sheave accelerates and brakes with every hoist; the rope takes the shock.

• Groove wear: a worn groove pinches or flattens the rope.

• Dust and salt in a port atmosphere, which grind the rope in the groove.

Why a welded, machined sheave lasts longer

Laminated hooks for melt shops

In a steel melt shop the ladle crane carries molten metal over people. A hook forged from a single piece can fail without warning if a crack runs through it. A laminated hook is built from riveted steel plates; if one plate cracks, the others carry the load. The BTGC catalogue describes this as a mandatory safety standard for smelters and foundries.

Gosan from BTGC

Gosan of Bilbao, Spain, has designed and manufactured lifting components since 1971 and makes more than 35,000 sheaves a year. The range BTGC supplies in the Kingdom covers:

• Machined and welded sheaves for wire rope transmission

• Hook blocks for port cranes, ladle cranes and mobile cranes

• Laminated ladle hooks for smelters and foundries

• Barrel couplings for hoisting drums and industrial crane wheels

Applications in the BTGC catalogue are port logistics, overhead cranes in steel mills, mega-projects and foundries. See our page for Gosan in Saudi Arabia and the full machinery and material handling offer.

Rope lubrication completes the picture

BTGC also supplies Bel-Ray and Royal Purple wire rope lubricants, penetrating oils that protect the rope core from the salt air of the Gulf and the Red Sea. Sheave, hook block and rope lubricant can be sourced as one crane maintenance package.

BTGC support in Dammam, Jubail and Yanbu

BTGC supports ports, steel mills and construction contractors from three branches. For a quotation send the rope diameter and construction, the sheave diameter and groove profile, the load and duty class, and a drawing or photo of the existing component.

Questions buyers ask

Can Gosan match an existing sheave? Yes, sheaves are made to the drawing or to measurements of the old part.

What standards apply? FEM and DIN for crane components; the catalogue lists FEM 1001 and DIN 15020 for blocks.

Lead time for a hook block? Depends on capacity and customisation; BTGC verifies long-lead items before a crane outage.

Contact BTGC

Email info@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.

In short: a measuring wheel slips on hot, scaled steel, and every slip means a crop cut in the wrong place or a coil that is longer than the order. A laser velocimeter measures speed and length without touching the strip, to 0.05 %. BTGC supplies KELK sensors for Saudi steel and aluminum mills.

In a hot strip mill, precision is profit. The crop shear cuts the head and tail of each transfer bar; cut too much and good steel goes to scrap, cut too little and a defective end reaches the coiler. The coil is sold by weight and ordered by length; every metre over the order is given away. Both decisions depend on one measurement: how fast the strip is moving and how far it has travelled.

Why contact measurement fails

A measuring wheel pressed against the strip slips on scale, water and vibration. The error is small per metre and large per shift. Wheels wear, bearings fail in the heat, and the sensor sits in the harshest spot in the mill.

How a laser velocimeter works

A laser Doppler velocimeter projects two laser beams onto the strip surface. The moving surface scatters the light; the frequency shift between the beams gives the speed directly, with no contact and no slip. Integrating speed over time gives length. The sensor sits away from the strip, behind an air purge, and survives heat, steam and dust.

KELK from BTGC

KELK, a Vishay Precision Group brand founded in Toronto in 1953, is the measurement standard of the world's rolling mills. The range BTGC supplies in the Kingdom covers:

• ACCUSPEED non-contact laser velocimeters for speed and length

• ACCUBAND stereoscopic width gauges that measure strip width even when the strip vibrates or tilts

• Rollmax roll force load cells, hermetically sealed and forged from a single block of steel

Applications in the BTGC catalogue are hot strip mills and plate mills at Hadeed and SULB, and aluminum rolling. See our page for KELK in Saudi Arabia and the full machinery and measurement offer.

Thickness and flatness too

For thickness and profile, BTGC supplies IMS Messsysteme X-ray and isotope gauges, so a mill can source its force, speed, width and thickness measurement through one partner. Together they feed the automatic gauge control that holds strip tolerance.

BTGC support in Dammam, Jubail and Yanbu

BTGC supports the metals and steel plants of Jubail and the Eastern Province from branches in Jubail and Dammam. For a quotation send the mill type, strip speed range, stand-off distance available and the mill automation system the sensor must feed.

Questions buyers ask

Can a laser velocimeter replace an existing wheel one for one? Usually yes; it needs a mounting position with a clear view of the strip and an air purge.

Does scale on the strip affect it? No, the Doppler measurement reads the surface whatever its condition.

What about calibration? The measurement is absolute; verification is by a length check against a known cut.

Contact BTGC

Email info@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.

In short: pulling an ordinary plug on a running motor draws an arc that can burn the technician and the contacts. A switch-rated plug breaks the circuit inside the socket before the plug comes out. BTGC supplies MARECHAL ELECTRIC DECONTACTOR plugs and sockets, including explosion-proof versions, in Saudi Arabia.

Plants are full of motors that are moved, swapped or serviced regularly: pumps on skids, conveyor drives, welding machines, portable fans and mobile generators. Each one is connected through a plug and socket, and each connection is a point where someone can be hurt.

The arc behind the plug

When a plug is pulled under load, the current does not stop at once. It jumps the widening gap as an arc. On a 400 A motor circuit the arc carries enough energy to burn skin, weld contacts and ignite gas. The usual safeguard is an upstream switch with an interlock, which adds cost, wiring and a second place to lock out.

What a switch-rated plug does

A DECONTACTOR combines the plug, the socket and the switch in one unit. Pushing the release button opens the switch inside the socket first; only then can the plug be withdrawn, and the pins are already dead. Plugging in reverses the sequence. The features that matter in a Saudi plant:

MARECHAL ELECTRIC from BTGC

MARECHAL ELECTRIC of France has made industrial connection systems since 1952, with nearly 100 patents behind the DECONTACTOR technology. The range BTGC supplies in the Kingdom covers:

• DECONTACTOR plugs and sockets with an integral load-break switch

• High-current connectors up to 700 A for mobile generators and shore power

• Explosion-proof plugs and sockets for ATEX and IECEx hazardous areas

Applications in the BTGC catalogue are mobile welding machines, pumps, conveyors and port and marine power. See our page for Marechal Electric in Saudi Arabia and the full electrical and power systems offer.

Where Saudi plants use them

• Steel mills and ports: overhead crane power connections and mobile equipment in melt shops, alongside the crane components BTGC supplies to the same plants.

• Oil and gas: hazardous-area connections for portable pumps and lighting.

• Water and utilities: submersible pump connections at lift stations.

• Construction mega-projects: temporary power distribution and generator connections.

BTGC support in Dammam, Jubail and Yanbu

BTGC stocks common ratings in the Kingdom and supplies the matching cable glands and mounting boxes. For a quotation send the current rating, voltage, number of poles, the environment (indoor, outdoor, hazardous zone) and whether a lockout is required.

Questions buyers ask

Do I still need an upstream isolator? The DECONTACTOR is rated as a motor circuit switch and local disconnect; check the plant electrical standard for the installation class.

Are hazardous-area versions certified? Yes, ATEX and IECEx certified models cover Zone 1, 2, 21 and 22.

Can old sockets be replaced one for one? Usually yes; BTGC checks the mounting dimensions and the keying.

Contact the BTGC power team

Email power@btc-ksa.com or call +966 13 856 0528. Branches: Dammam, Jubail and Yanbu. Request a quote.