Clarification Tables
Depending on the “fluid service”, a Cleaning Matrix
for each kind of pipe has been prepared
in the Attachment 02.
Factors such as the diameter or length of the pipel
ine have not been taken into account in
the matrix, therefore, the cleaning method and acce
ptance criteria could be changed to
others more appropriated due to the actual conditio
ns in site.
Details to understand the matrix (10130-00-161-PD-0
004-Att02) are shown below:
METHOD
CLEANING METHOD
DESCRIPTION
DETAILS
1
MECHANICAL
CLEANING
(diameters
greater than 24”
or equipment
provided with
manways of 24”)
1A
Brushing or scraping.
1B
HP water jetting or Hydromilling: use a high pressu
re jet of
water or a mixture water-abrasive to remove debris
by
erosion (Compressor’s suction pipes).
1C
Pig from source to destination. Generally used on h
eaders
and long laterals only.
2
AIR BLOWING
(all diameters)
2A
Continuous Air Blowing (small diameters).
2B
Depressurization by quick opening valve: pressuriza
tion with
air and subsequent sudden release (normally lines g
reater
than 8").
2C
Air Blasting: pressurization with air until disc ru
ptures. Disc
specifications and rupture pressure to be calculate
d and
verified to be within the piping line specs.
3
WATER / OIL
FLUSHING
(diameters less
than 12”)
3A
Low velocity water flushing: typically flushing onc
e through
the system, to remove gross debris.
3B
Pulse water flushing: External Water Slug Generator
Equipment required with Air Receiver as delivery sy
stem.
The traveling pulse water is filtered with a 40 mic
ron filter.
3C
Circulate fluid with temporary pumps to minimum of
125% of
normal operating velocity. System is filtered to a
system a
determined filter size.
3D
Circulate fluid with permanent system pumps. System
is
filtered to a system determined filter size. High s
peed
circulation flush with water.
Clarification Tables Depending on the “fluid service”, a Cleaning Matrix for each kind of
pipe has been prepared in the Attachment 02. Factors such as the diameter or
length of the pipeline have not been taken into account in the matrix, therefore,
the cleaning method and acceptance criteria could be changed to others more
appropriated due to the actual conditions in site. Details to understand the matrix
(10130-00-161-PD-0004-Att02) are shown below: METHODCLEANING
METHODDESCRIPTION DETAILS 1 MECHANICAL CLEANING (diameters greater
than 24” or equipment provided with manways of 24”)1A Brushing or scraping. 1B HP
water jetting or Hydromilling: use a high pressure jet of water or a mixture
water-abrasive to remove debris by erosion (Compressor’s suction pipes). 1C Pig
from source to destination. Generally used on headers and long laterals only. 2 AIR
BLOWING (all diameters) 2A Continuous Air Blowing (small diameters). 2B
Depressurization by quick opening valve: pressurization with air and subsequent
sudden release (normally lines greater than 8"). 2C Air Blasting: pressurization with
air until disc ruptures. Disc specifications and rupture pressure to be calculated
and verified to be within the piping line specs. 3 WATER / OIL FLUSHING (diameters
less than 12”) 3A Low velocity water flushing: typically flushing once through the
system, to remove gross debris. 3B Pulse water flushing: External Water Slug
GeneratorEquipment required with Air Receiver as delivery system. The traveling
pulse water is filtered with a 40 micron filter. 3C Circulate fluid with temporary pumps to
minimum of 125% of normal operating velocity. System is filtered to a system a
determined filter size. 3D Circulate fluid with permanent system pumps. System is
filtered to a system determined filter size. High speed circulation flush with
water.
Clarification Tables Depending on the “fluid service”, a Cleaning Matrix for each kind of
pipe has been prepared in the Attachment 02. Factors such as the diameter or
length of the pipeline have not been taken into account in the matrix, therefore,
the cleaning method and acceptance criteria could be changed to others more
appropriated due to the actual conditions in site. Details to understand the matrix
(10130-00-161-PD-0004-Att02) are shown below: METHODCLEANING
METHODDESCRIPTION DETAILS 1 MECHANICAL CLEANING (diameters greater
than 24” or equipment provided with manways of 24”)1A Brushing or scraping. 1B HP
water jetting or Hydromilling: use a high pressure jet of water or a mixture
water-abrasive to remove debris by erosion (Compressor’s suction pipes). 1C Pig
from source to destination. Generally used on headers and long laterals only. 2 AIR
BLOWING (all diameters) 2A Continuous Air Blowing (small diameters). 2B
Depressurization by quick opening valve: pressurization with air and subsequent
sudden release (normally lines greater than 8"). 2C Air Blasting: pressurization with
air until disc ruptures. Disc specifications and rupture pressure to be calculated
and verified to be within the piping line specs. 3 WATER / OIL FLUSHING (diameters
less than 12”) 3A Low velocity water flushing: typically flushing once through the
system, to remove gross debris. 3B Pulse water flushing: External Water Slug
GeneratorEquipment required with Air Receiver as delivery system. The traveling
pulse water is filtered with a 40 micron filter. 3C Circulate fluid with temporary pumps to
minimum of 125% of normal operating velocity. System is filtered to a system a
determined filter size. 3D Circulate fluid with permanent system pumps. System is
filtered to a system determined filter size. High speed circulation flush with
water.