The following are hydraulic hose best practices as part of increasing overall machine reliability. This is especially critical during roll removal and installation.
First, develop a dedicated "toolbox" for roll changes which includes a manual/binder containing the roll change procedures and laminated pictures of:
Have spare end caps for hoses and roll pipes available - in case of loss or damage.
Pre-pipe each roll exactly the same so fittings do not have to be transferred from the roll being removed to the roll going in. This saves time and reduces piping errors and leaks.
Next, permanently mark each roll connection, each hose end and the pipe/tube where the hose connects with descriptive tags matching the hydraulic schematic descriptions. We also recommend stainless steel tags permanently attached to the roll and pipe/tube and secured to the disconnect end of the hose.
NOTE: Valmet recommends replacing all hoses every 5-10 years maximum based on hose type, operating conditions and environment.
The following hose routing recommendations and photo are courtesy of Parker:
Parker and other sources have excellent web articles on best practices for hose installation and routing. Topics including proper hose length and installation, proper bend radius, avoiding hose twist, routing and clamping are covered.
SAE International has published article SAE J1273 consisting of recommended practices for hydraulic hose assemblies which can be found at www.sae.org. The document covers hose selection and routing, hose / assembly fabrication, hose installation and replacement, hose storage and maintenance inspection. Similarly, ISO 17165-2 is an article listing practices to follow for hydraulic hose assemblies, and can be found at www.iso.org.
If you have any questions or need schematics, part numbers or other help building your Hydraulic Hose Best Practices procedures, contact your Valmet representative.