Underwater welding is a process whereby metals are melted together underwater to too mend a structure or compose a new structure. Used can fat wells, ships, and other underwater structures, underwater welding is done by one of two methods. The first is hyperbaric welding, can which a structure is created approximately the weld and a pressurized surroundings created. The second is arc welding, can which the welding electrode contains a flux coating that releases gases to reserve the morals of the weld. although of the dangers of shock, explosion and poisoning, underwater welding is unique performed by professionals with both diving and welding certifications.
1. Hyperbaric (dry) welding
1) identify the situation and material of the mutual to be welded and country it. Most underwater welds embrace steel, besides metals can vary.
2) Prepare a chamber to place approximately the mutual (each mutual to gorge a divide chamber). Chambers mount can size - some are large enough to adjust little welder-divers, others are unique small enough because the welding electrode.
3) Introduce gas into the chamber and pump out the water.
- A normal gas combination uses helium and oxygen, besides requirements change based can the concrete mutual to be welded. The stress of the chamber to be slightly can that of the surrounding water.
4) race a land equip to the chamber and perpendicular a harbour because your electrodes.
- Multiple electrodes will apt be required, and to be placed can proceed before the belt of the mutual to be welded.
5) Dive to the weld site.
6) start can the land equip and weld the mutual from exterior the chamber.
7) start off the land equip although shortly although the welding is done.
2. moist welding
1) examine and country the mutual to be welded; identify the types of metals involved.
2) Prepare the adequate electrodes, design out the order of welding and dive to the weld site.
3) Weld the joint, ensuring that the flux coating of the weld is coming off although expected, and that too much hydrogen is no approaching the joint.
4) start off the land equip although shortly although the welding is done.
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