L&W SC-300 E, Operating Instructions Manual

Page: 88 / 89

ANNEX SCOPE OF TESTING; TEST CRITERIA
Information on the service life of
L&W high pressure hoses
Version: 2020-06-01
Page - 10
Recommended scope of testing "visual
inspection" (before initial commissioning or
recommissioning)
 Is all user information required for safe operation of the system available (e.g. flow chart,
operating instructions)? 

Do the hose lines comply with the flow chart or parts list?


Are there protective measures in place, such as pressure relief valves, for cases of unusually
high pressure pulses or pressure amplifications? 

Are the hose lines marked with the name or abbreviation of the manufacturer, maximum
permissible operating pressure, nominal diameter, quarter/year of manufacture? 
 Are the hose lines installed in such a way that, in accordance with DIN 20 066 
- the natural position does not hinder movement?
- turning or twisting of the hose is prevented, likewise tensile load caused by a line that is
too short and a bending radii that is too small?
- the hose is routed via a kink protector (if necessary on the connecting element)?
-
sufficient clearance prevents external mechanical influences or abrasion on the
edges?
- hose bridges prevent damage being caused by driving over the hose line?
- hose guides (such as hose saddles and sufficiently wide hose brackets) protect loosely
laid hose lines and
- a heat shield protects against high temperature exposure?
 Are suitable protective measures, such as fixtures, safety gear or shielding provided for hose
lines that, in the event of failure, pose a risk of whipping?

A risk is to be assumed if persons are generally present in the immediate vicinity of the hose
lines, for example.
 Do the hose lines of newly commissioned or re-commissioned machines already show signs
of damage?


Are the installed hose lines still within the storage/use period recommended by the
relevant manufacturer? 

Are the hose lines free of paint?


Are the hose lines free of chafe marks?


Does the operating manual contain information on test intervals? If so, what?

Note:
The installed hose lines should not be made from used hoses or used press fittings that
have already been in use as part of a hose assembly!