National Association of Amusement Ride Safety Officials

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4 messages – Page 1 of 1

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	RE: Hydraulic hose and electrical wire maintenance	posted by David Collins
	posted on April 03, 2006 at 06:24 PM	Reply to this Message
	FYI: ISO 4413Hydraulic Fluid Power-General Rules relating to Systems, 1998 is invoked by ASTM F-2291 Standard Practice for Design of Amusement Rides and Devices, Section 12 Cleaning and Painting states: "During external cleaning and painting of equipment, sensitive materials shall be protected from incompatible liquids (some types of paints can be considered incompatible fluids). During painting, all nameplates, data marking and areas that should not be painted (e.g. piston rods, indicator lights, etc. (including gauges) shall be covered, and the covers shall be removed afterwards." ISO 4413 also references ISO 8331, 1991 Guide to Selection, Storage, Use and Maintenance (Hoses and Hose assemblies). I also remind you that ISO 4413, Section 9.5.3 Protection Against Failure states "If the failure of a hose constitutes a whiplash hazard, the hose assembly shall be restrained or shielded. If the failure of a hose assembly constitutes a fluid ejection or fire hazard, it shall be shielded." One of the best ways to "shield" a hydraulic hose is to cover it with "spiral wrap". The spiral wrap materials can be obtained in almost any color. I hope this information is helpful.
	RE: Hydraulic hose and electrical wire maintenance	posted by David Collins
	posted on April 03, 2006 at 10:49 AM	Reply to this Message
	As a follow-up I checked the Gates site. Their electronic catalog has one entry regarding painting hoses. The catalog was not available but you should check the site when it is available. The third reason to NOT paint a hydraulic hose is that the painting covers the markings of the hose so it is impossible to get a proper replacement in the event of a hose failure. It is CRITICAL that hydraulic hoses be replaced with the same rated hose as required by the ride manufacturer.
	RE: Hydraulic hose and electrical wire maintenance	posted by David Collins
	posted on April 03, 2006 at 10:31 AM	Reply to this Message
	You can get the information on the care and handling of hydraulic hose from any of the hose manufacturers. Gates has really high quality information. There are two issues regarding paint on hydraulic hose. First is related to keeping the jacket so it can breathe. The second is that some paints have chemicals that can attack the rubber componds. If you want to have "colored" hydraulic hoses wrap them with colored spiral wrap (not tape).
	Hydraulic hose and electrical wire maintenance	posted by Paul H Harrison
	posted on April 02, 2006 at 12:41 PM	Reply to this Message
	I am looking for documentation concerning why not to paint hydraulic hoses, air lines and electrical wires. Any leads to documenting this issue will be appreciated.

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