Zoomlion ZCC1100, Operator'S Manual, Page: 117 / 291

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Operator’s Manual for Crawler Crane
Operator’s Manual for Crawler Crane
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ZCC1100H Crawler Crane 3-35
c) Operate the equipment with particular care near underground cables, all applicable local
safety guidelines as well as the special guidelines and safety measures of the utility
companies must be noted and obeyed.
d) In the event of any unexpected encounters with underground cables or associated
warning sign and protective coverings, cease working with the equipment immediately and
inform the appropriate superiors.
e) It is prohibited to uncover underground cables with the equipment. The underground
cables must only be uncovered manually with blunt tools.
f) Secure, support, or prop up all exposed underground cables so that they cannot sway,
slide, or become deformed.
g) Stabilize the cable ducts and trenches and secure the edges to prevent caving.
3.7.3 Notes in connection with gas pipes
a) Whenever the position of the gas pipe casing changes or the casing is damaged, report
this to the appropriate gas company. The gas pipe can only be backfilled after inspection,
repair, and approval by specialist personnel from the gas company.
b) All devices of the gas supply network around the site must remain accessible (fittings,
valve boxes, manhole covers, etc.). Existing markings and information signs must not be
covered, rearranged or removed.
3.7.4 The consequences of
a gas pipe’s damage
The escaping gas:
a) Forms an inflammable gas-air mixture around the affected area.
b) Can strike personnel or equipment if it is under high pressure.
c) Not only endangers personnel and equipment on the site, but also passers-by and
residents in the neighborhood.
A gas fire can develop in seconds and spread explosively. In a conventional supply pipe with a
leak of 2" (50 mm), for example, the flames can be up to 10 m (33 ft) high if the gas is escaping
at a pressure of 1 bar (14.5 psi). The equipment and surrounding construction equipment will
be burned quickly.
Even a minor change in the position of the gas pipe can result in damage to other sensitive
points of the gas network, for example connection points or house feeder pipes. Leaks and
small leaks that are not immediately detectable are very dangerous if gas is allowed to escape
over a lengthy period of time and penetrate along the gas pipe network into the surrounding
buildings. An explosive gas-air mixture is formed considerably quicker in enclosed areas than
in the open air. Every source of ignition, such as On /Off switches on electrical equipment or the
turning on of a light, can trigger an explosion.
Corrosion can cause leaks to form within 5 -10 years with minor damage to the casings of metal
gas pipes.
For reference only.
Operators manual should be consulted and adhered to.