High Pressure Water Jetting

	Heat Exchanger Cleaning
	Boiler Descaling
	Pipework
	Drain & Pipe Descaling
	Tank Cleaning
	Pre-commissioning Cleaning
	Surface Preparation

Heat Exchanger Cleaning

With a thorough understanding of the physics of High Pressure Water, even the hardest deposits can be removed from heat exchanger tubes of sizes down to 12mm. In addition to conventional cleaning techniques, Dyna - Jet offers "Manless" Tube Cleaning for extra safety in this potentially hazardous activity.

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Boiler Descaling

Heavy deposits and clinker from boiler tubes is best removed with High Pressure Water without the damage and wear which can be caused by mechanical methods. Fire side tubes can also be cleaned and ceramic removed without the dust hazard associated with manual cleaning.

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Pipework

Removal of debris and obstruction from sewers, process pipes and closed drain systems. Generally using High Pressure Water Jetting ranging from 4,000 psi up to 30,000 psi, hard scale and even concrete blockages can be removed. Electro-mechanical and chemical cleaning are also offered for situations which preclude jetting.

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Drain & Pipe Descaling

Cleaning of larger diameter pipework requires specialist tools to cope with scaling and large quantities of silt or sludge. Dyna - Jet operates a number of purpose-built units to deal with this situation. High Volume, high pressure pumps with flows of up to 90 IGPM at pressures up to 5,000 psi have the power to clean large diameter pipework of 1.5 metres in diameter. The power of these units will remove heavy silt and even quite large objects such as bricks, boulders, and loose metal objects. Roto-Fan units are designed to descale hard deposits from process pipework by rotating a multi-jet head around the internal face of the pipe, stripping scale deposits as it goes. This unit is particularly effective with the very hard scales found in down stream petrochemical plants. Rotary descaling units are mounted on an adjustable roller assembly and used to descale large pipes up to 2 metes in diameter. The ability to apply very high pressure in close proximity to the surface allows for the removal of scaling or paint coatings on pipe internals prior to inspection or recoating.

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Tank Cleaning

Tanks of all descriptions and sizes from crude oil storage tanks to deep tanks in oil rigs. With a wide variety of tools available for liquids, semi-liquids and solids, to suit the purpose.

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Pre-commissioning Cleaning

The critical phases of start-up in production plants, oil refineries, production of medicines and other industries where cleanliness is critical require high integrity, pre-commissioning cleaning to avoid contamination of product and damage to sensitive valves and equipment. Dyna - Jet has long experience in devising and implementing cleaning procedures in highly demanding environments.

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Surface Preparation

The use of High Pressure Water Jetting for the surface preparation of steel surfaces is now accepted in the marine, oil and gas, and petrochemical sectors. In conjunction with surface tolerant primers which are now available from all major paint manufacturers water jetting has proven advantages over conventional grit blasting. Apart from the obvious factors of less mess and the problems caused by grit contamination of sensitive equipment, water jetting effectively removes salts from steel surfaces and does not cause inclusions of corrosion (see illustration).

During the last decade, Dyna - Jet has used High Pressure Water Jetting to prepare steel surfaces on several million square metres of steel in tanks, decks, pipework and structures. As part of a joint-venture with Jurong Shipyard the company worked on up to 50 ships a year, and has undertaken work for many major clients: Mobil, Chevron, BP, JO Tankers, Shell, Tanker Pacific, Stolt Nielsen, Vela, National Iranian Oil Company, Maersk, NedLloyd, Clough and many others.

The National Association of Corrosion Engineers (NACE), the Steel Structures Painting Council (SSPC) have accepted High Pressure Water Jetting as a valid surface preparation technique and issued standards for its use.

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