Storage and Maintenance
Handling and storing plastic-lined pipe
To obtain maximum performance from Plastic-Lined Piping Products, it
is important that the flared or molded end faces of the plastic are
protected from damage during storage, handling and installation. The
following should be considered when storing and handling
Plastic-Lined Piping Products.
Safety precautions for plastic-lined pipe
Plastic-lined pipe can be fabricated on-site by properly certified
personnel. When field fabricating, adequate ventilation (such as
exhaust fans) should be used. Overheating of the plastic can cause
it to degrade and generate vapors.
Avoid breathing vapors. Vapors can cause severe irritation to skin,
eyes and respiratory tract. When field fabricating, never heat the
plastic with a torch or open flame.
Welding Plastic-Lined Piping Products
Welding should not be performed on swaged plastic-lined pipe and
fittings. Heat generated from welding will cause extensive damage
to the plastic liners. If welding is necessary, use
THERMALOK plastic-lined pipe,
since the liner can be moved back and out of the way from the heat
source during welding. Any welding should be performed by a welder who is
trained and certified to ASME Boiler and Vessel Code, Section IX.
Plastic-lined pipe and fittings should not be used as a ground for
electrical welders or other equipment.
Painting Plastic-Lined Piping Products
All pipe, fittings, and valves supplied by Resistoflex have a grey
protective coating applied to minimize oxidation during shipping and
handling. Refer to NACE guidelines and recommendations for sandblasting
and selection of an appropriate primer and topcoat suitable for your
plant environmental conditions.
It is important that the raised plastic face on all plastic-lined
piping components is protected from damage during sandblasting and
painting. Make sure that the protective end caps remain in place at
all times during these operations, and direct the sandblasting away
from the face of the flange. As an extra precaution, you may want to
remove the protective end cap, apply protective tape over the plastic
face, then replace the cap before sandblasting and painting. If the
exterior of the pipe is to be treated with a head curable protective
coating, exercise caution during the heating process. Never apply heat
in excess of the liner's maximum temperature rating.
PTFE venting collars on swaged pipe and vent holes on PTFE THERMALOK
pipe and PTFE-lined fittings should not be plugged with paint. The
collars and holes are part of the venting system needed to prevent
possible gas buildup behind the liner and possible liner collapse.
Pipe, fittings, and valves can also be special ordered without paint,
but longer lead times are necessary.
- Products are shipped with a high performance, two component,
epoxy primer protective coating. This coating in only a primer and
is not meant for outdoor exposure without a suitable topcoat.
Protective end caps are not designed for prolonged outdoor exposure.
- The protective end caps on all pipe and fittings should be left in
place until the pipe is ready to be installed. Do not damage the plastic
sealing faces when removing the end caps.
- Avoid rough handling of plastic-lined pipe in temperatures below
40°F. Plastic becomes brittle in low temperatures, and is more
susceptible to cracking during rough handling.
- Do not put the lifts of a forklift inside of the pipe to transport.
This can damage the plastic liner.
- The following temperature guidelines should be followed for
Plastic-Lined Piping Products:
Do not store PP, PVDF, or PTFE-lined pipe in temperatures
Avoid storing Plastic-Lined Piping Products where they will be
exposed to ultraviolet light for long periods of time.
- The center of gravity of MULTI-AXIS®
pipe may not be readily apparent. Be sure to hand carefully.
Lined Pipe and Fittings are to be stored under cover
until the time of installation.
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