Con Forms hose inspection checklist will ensure you are hitting all the marks when inspecting your hose.
Match the hose design, materials, and fabrication to meet your application requirements in terms of inside diameter, flexibility, and radius of curvature. In all laydown applications, use the minimum length of hose that is needed to reach the point of placement. Hose is three times harder to pump through than steel pipe. For the best results, size the system to the largest diameter that is practical for the application; at a minimum, hose diameter should be three times the largest aggregate size in the mix.
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SELECT THE RIGHT HOSE
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Always use hose that is rated for working pressures that meet or exceed the rated working pressure of the pump being used.
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Acceptable hanging weight can vary for different pumps and boom lengths or models. Always select a combination of pipeline components that fit within the boom manufacturer’s guidelines for hanging weight to avoid an unsafe condition.
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SCAN THIS CODE TO GET IT ON YOUR PHONE.
OUTSIDE COVER Examine the outside cover for bulges, folds, kinks, and soft spots. These may indicate the inside reinforcement layer could be broken or displaced. Check for cracks, tears, abrasions, missing material, or exposure of the inner reinforcement layer. INNER LINER Examine the inner liner for localized wear areas that indicate wall thinning, paying special attention to the first twelve inches adjacent to the metal hose body. Use a flashlight to examine as much of the hose as possible (longer hoses are harder to examine) for signs of exposed reinforcement (sometimes referred to as “bird nesting” or “spider webbing”), loose plies, or cuts and gouges. On steel-reinforced hose, to avoid possible hand injury, do not reach into a damaged hose. Remove excessive dried concrete residue inside the hose to avoid restricting the flow and reduce the possibility of plugging. Be aware of any discoloration or corrosion, particularly at the hose ends, which can point to chemical degradation or exposure to harsh environments. METAL ENDS (HOSE BODY) Examine the inlet face of the metal hose body for the wear known as bell-mouthing. Examine the inside of the hose body under the barb area for signs of wear that can be felt as a bumpy wear pattern. This indicates the hose assembly must be retired immediately. Verify that the hose is visible through the ferrule inspection hole. If it is not, the hose may have started to slip out of the hose body assembly. COUPLINGS & GASKETS Examine the surface of the Hose Body Assembly where the rubber gasket attaches for damage such as nicks, dents and abrasions. Ensure the area is free of concrete buildup. Ensure that the mating parts are aligned properly. Poorly connected hose ends or misaligned couplings can cause serious accidents or leaks. Inspect the gasket, clean out the grout, and make sure the gasket is able to seal the joint. Ensure that couplings are securely fastened and free from damage or wear. The coupling must make a tight and flush fit. Verify safety pins are in all snap couplings!
HOSE INSPECTION GUIDES
OUTSIDE COVER
INNER LINER
METAL ENDS
COUPLINGS & GASKETS
Never kink the hose to stop the flow of concrete. Kinks cause blockages and pressure spikes that can violently and uncontrollably straighten out under pressure. Kinking also damages the reinforcement elements of the hose. Do not attempt to resolve a plugged hose by crushing the sides; this will damage the reinforcing materials and lead to a faster failure. Never hang a two-ended discharge hose from a boom unless you are tying it into a system. Do not use a double-ended hose at the discharge end of a hose system when connected to a boom. Only use hoses with a working pressure rating that meets or exceeds the maximum pressure rating of the concrete pump with which it is being used. Extreme care must be taken before opening any coupling when dealing with a plugged system. Always verify that a blocked hose is not pressurized before opening any coupling. Never use a hose with frays, breaks or exposed braiding/reinforcement on either the inside liner or outside shell.
JOB SITE HOSE SAFETY
Never use compressed air to clean out a hose.
Never drag a hose by attaching to the coupling or drag a hose using a boom arm.
Never beat on a hose with a hammer or other blunt object. The impact risks damaging the built-in reinforcing material, which can lead to premature failure. Always perform internal and external visual inspections before every use, even if this is the second pour of the day.
All items hung from a boom arm should be restrained with safety slings.
Safety slings are the best defense when a hose becomes separated from a boom. It should be lassoed below the hose body on one end and attached to the boom tip on the other. If a separate steel reducer is also used in the tip assembly before the hose, an additional strap must be used to tie the assembly to the boom.
Couplings should never be used as a mounting location for a safety strap.
Slings used on boom tips should be defect-free, meant for that purpose, and inspected frequently.
GET TO
KNOW THE HOSE
OUTER COVER
FULL FLOW HOSE BODY
FERRULE
GASKET SURFACE
INNER LINER
REINFORCING PLIES
SNAP RING
INSPECTION HOLE
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