Q
: What are the
uses of cement-lined pipe?
A
: Saltwater intake for
plant cooling, fire lines
and water lines of all types.
Q
: What does
cement lining offer the user?
A
: Cement lining serves
three main purposes, including protecting the I.D. of the
line from rust and corrosion for many years, keeping potable
water clean, pure, colorless and odorless and increasing flow
(according to the Hazen Williams formula) up to 15% over that of
new unlined steel pipe.
Q
: Can
cement-lined pipe be field fabricated by cutting and welding?
A
: Yes. Cutting and
welding of cement-lined pipe is covered in the API RPI IOE
specification.
Q
: Is
cement-lined pipe fragile to transport and work with?
A
: No. However, chipping
can occur to the ends during coating and wrapping or unloading, and
if incurred, can easily be repaired in the field.
Q : Are there
different types of cement lining available?
A
: Yes, many. The most
widely used is the AWWA sand and cement mix, but by using different
cements, additives, pozzolans, etc. a lining for practically any
service can be applied.
Q : Is it
necessary to steam cure?
A
: No. It’s not necessary
because of our warm, humid Houston climate and use of plastic end
covers combined with the protection of our warehouse.
Q
: Can cement
lining withstand high pressure?
A
: Yes. Cement lining,
because of its cylindrical shape and the support provided by the
outer steel pipe, can withstand the designed pressure requirements
of the pipe within which it is encased.
Q
: How is the
lining secured to the pipe?
A
: A mechanical bond is
formed as the cement is centrifugally forced against the pipe I.D.
Strength in this bond is increased as the lining cures in its
cylindrical shape. Removal of a cured lining is only achieved
through chipping and blasting, or drilling.
Q
:
Is cement lining cost effective?
A : Yes. The original
cost of cement lining is far less than most other linings. When all
factors are evaluated, inclusive of installation, smaller pump
requirements, etc., coupled with the historic long service life and
low maintenance, cement lining definitely proves to be cost
effective.
Q
: Can your company rehabilitate
pipelines already in service or line at our site?
A : Yes, our affiliate
company does cement mortar rehabilitation of pipelines from 75mm to
3600mm and can cement line pipelines in a stackyard fashion prior to
installation or after installation, prior to being put into service
