1. GENERAL
1.1 This
specification defines minimum quality and technical standards governing
preparation of carbon steel pipes and application asphalt enamel for
anti-corrosion coating suitable for offshore pipelines. This specification is to be used in
conjunction with the following documents:
·
Basis of Design 84506-60-00-2L-060
General Specification 84506-60-00-2L-000 - Definitions and
Specification Directory
·
General Specification
84506-60-00-2L-010 - Quality Assurance / Quality
Control
2. DESIGN REQUIREMENTS
2.1 The
preparation of carbon steel pipes and application of asphalt enamel for
anti-corrosion coating shall be in accordance with;
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API RP 5LW
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Recommended Practice for
Transportation of Linepipe on Barges and Marine Vessels.
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API RP 5L1
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Recommended Practice for Railroad
Transportation of Linepipe.
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API SPEC 5L
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Specification for Line Pipe.
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ASTM D-146
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Standard Test Methods for Sampling
and Testing Bitumen Saturated Felts and Woven Fabrics
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ASTM D 4285
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Method for Indicating Oil or Water in
Compressed Air
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ASTM E-337
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Test Method for Measuring Relative
Humidity with a Psychrometer (The Measurement of Wet and Dry Bulb
Temperatures).
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AWWA
C-203
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Coal-Tar
Protective Coatings and Linings for Steel Water Pipelines, Enamel and Tape
Hot-Applied.
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BS 4147
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Bitumen Based Hot Applied Coating
Materials for Protecting Iron and Steel.
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NACE RP-02-74
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Recommended Practice, High Voltage
Electrical Inspection of Pipeline Coatings Prior to Installation.
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SSPC-PA-2
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Measurement of Dry Paint Thickness
With Magnetic Gauges
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SSPC-SP-10
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Near-white Blast Cleaning
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3. COATING APPLICATION REQUIREMENTS
3.1 CONTRACTOR
shall perform a procedure qualification trial (PQT) for COMPANY approval, prior
to production to demonstrate that safety, quality and environmental standards
are being achieved. This trial shall
comprise 10 joints of each pipe size, all of which shall be subject to all QC
tests.
3.2 Coating
application shall be performed if possible in COMPANY presence.
3.3 CONTRACTOR
shall provide COMPANY with reasonable facilities and space for any COMPANY
inspection, testing, and information gathering that COMPANY desires, and
COMPANY shall have free access to all plant locations concerned with furnishing
of materials or performance of work under this specification
3.4 Pipe
heating, blasting and coating operations shall be performed by and under the
supervision of qualified personnel experienced in coating
application.
3.5 CONTRACTOR
equipment for blasting, coating, handling and storing pipes shall be in a good
condition which permits applicators to follow approved procedures and
consistently obtain results required by this specification.
3.6 CONTRACTOR
QA/QC shall furnish qualified personnel, material and equipment to perform
examinations and tests specified herein.
This equipment shall be available for COMPANY monitoring of work
activities. Inspection provided by
COMPANY shall not relieve CONTRACTOR of its responsibility to ensure quality
control.
3.7 Inspection
points shall be established as follows:
·
Pipe receipt
·
Immediately before surface preparation
·
Immediately following surface
preparation
·
Immediately prior to asphalt enamel
application
·
Following asphalt enamel application
3.8 Pipe
ends shall be protected from damage throughout the coating process.
4. materials
4.1 All
materials and material manufacturers shall be subject to COMPANY approval.
4.2 Prior
to approval of CONTRACTOR materials, COMPANY may request material samples to be
submitted for testing by COMPANY. If any
sample is found not to conform to the required standard, material represented
by that sample will be rejected, including any of CONTRACTOR materials that
have been previously approved.
4.3 All
materials that have, at any time and for any cause, been rejected as unsuitable
by COMPANY shall be removed from the equipment, storage and work areas and
shall not be mixed with other material for use in coating COMPANY pipes.
4.4 All
materials shall be packaged in suitable and approved containers. Containers shall be plainly marked with the
manufacturer’s name, type of material, batch or lot number, date of manufacture
and material expiry date. The finished
coating on each pipe shall be traceable back to the batch numbers of all
materials. Storage shall be in accordance
with material manufacturer’s recommendations.
4.5 CONTRACTOR
shall have covered storage areas for all materials, which when exposed to the
atmosphere are known to absorb moisture.
5. PIPE receipt
5.1 CONTRACTOR
shall assume custody and full responsibility for pipes upon receipt from the
ship, barge, rail car or truck.
5.2 Pipes
shall be handled and stored in strict accordance with Project Specification for
Handling, Storage and Transportation of Linepipe (84506-60-30-2L-270).
5.3 CONTRACTOR
shall make an accurate tally of pipes received indicating the Purchase Order
and manifest numbers. Each pipe number
and length shall be individually verified against the manifest. Any discrepancies shall be stored in a
separate stockpile and investigated.
5.4 As
pipes are unloaded, CONTRACTOR shall visually examine each piece for
damage. Any pipes found to be damaged
upon receipt shall be clearly marked and the type and extent of damage shall be
noted on the receiving report for each pipe.
5.5 Pipes
not reported by CONTRACTOR as damaged upon receipt, but subsequently found to
have been damaged will be assumed to have been damaged by CONTRACTOR and shall
be replaced by CONTRACTOR.
6. REPAIR OF BARE PIPES
CONTRACTOR shall grind or otherwise repair damaged bevels
and damaged pipes, as directed by COMPANY and in accordance with the relevant
Project Specification for Linepipe 84506-60-30-2L-210 (Seamless).
6.1 Scratches,
grooves, gouges, dents and slivers may be removed by filing or grinding, but
only to the extent specified in API 5L.
After filing or grinding, pipes shall be checked to verify the wall
thickness exceeds the minimum required.
6.2 CONTRACTOR
shall furnish a beveling machine acceptable to COMPANY. Bevels shall be made by machine tools or
flame cut. CONTRACTOR shall rebevel all pipes ends that are damaged to such an
extent that they cannot be repaired by grinding or filing.
7. SURFACE PREPARATION
7.1 CONTRACTOR
shall visually inspect each pipe carefully for steel defects before surface
preparation. Pipe with significant
defects shall be segregated and shall not be coated.
7.2 CONTRACTOR shall remove all oil and
grease from exterior pipes surface by washing with COMPANY-approved
solvent. The solvent shall be fully
removed from the pipe prior to blasting.
7.3 All contamination shall be removed from
the pipe by solvents in accordance with SSPC-SP 1.
7.4 Each pipe shall be uniformly heated prior
to blast cleaning, to completely remove all moisture and to prevent
condensation on the pipes. During surface
preparation and coating application:
·
Substrate temperature shall be a
minimum 3°C above dew point and above 25°C, but not exceeding 60°C.
·
Ambient temperature shall be greater
than 5°C and relative humidity less than 85%
unless pipe is pre-heated.
7.5 Temperature, dew point, and relative
humidity shall be determined in accordance ASTM E-337. Measurements are required at the start of
each shift and every four (4) hours thereafter.
7.6 Exterior pipe surfaces shall be abrasive
blast cleaned to SSPC-SP-10 "near white metal finish”. The largest commercial grade of abrasive
permitted is SAE No. G-25. Contractor may with company approval use a different
grade of abrasive as long as the surface profile is between 50-100 microns
7.7 Abrasive working mixes shall be:
·
Made of cast iron, malleable iron or
steel of maximum particle size no larger than that passing through a 16 NBS
mesh screen (1.18-mm), U.S. Sieve Series.
·
Selected to produce a surface anchor
profile between 50 and 100 microns.
·
Maintained by frequent small additions
of new steel grit or shot consistent with abrasive consumption. Infrequent large additions shall be avoided.
·
Maintained free of contaminants.
·
Prevented from entering the pipe
interior.
7.8 Abrasive blast cleaning equipment shall
use the centrifugal force provided by rapidly spinning wheels to propel the
abrasive towards the pipe surface. Spent
abrasive, dust and other fine particular matter shall be separated from the
abrasive through an automatic recycling facility so that the working mix remains
in good condition. Additions of new
steel grit/shot shall restore the working mix to optimal proportions.
7.9 Where relevant all compressed air used
for blasting shall be free of water and oil.
Prior to using compressed air, air quality downstream of the separator
shall be tested in accordance with ASTM D 4285 by blowing air onto a clean
white blotter or cloth for two minutes to check for any contamination, oil, or
moisture. Tests shall be repeated at the
beginning and end of each shift, and at least four (4) hour intervals. Tests also shall be made after any
interruption of air compressor operation, or as required by COMPANY. Air shall be used only if tests indicate no
visible contamination, oil, or moisture.
If
contaminants are evident, equipment deficiencies shall be corrected and the air
stream shall be re-tested. Surfaces that
have been blasted with contaminated air shall be re-blasted with clean air and
abrasive, and coatings that have been applied using contaminated air shall be
removed and re-applied using clean air.
7.10 After blasting and prior to coating, every
pipe shall be inspected by CONTRACTOR under ample lighting conditions. Surface roughness shall be inspected on the
first pipe of every shift and 1 pipe in 20 thereafter using Testex Press-O-Film
together with a calibrated micrometer or equivalent method approved by COMPANY.
Note this inspection level can be reduced with Company approval
7.11 Blast-cleaned surfaces shall not be
contaminated with dirt, dust, metal particles, oil, water, or other harmful
matter from any source, nor shall anchor patterns be destroyed or burnished by
pipes transport systems, processing equipment or tools.
7.12 Following abrasive cleaning and prior to
coating application, all dust, grit, metal particles or other loose
contaminants remaining on the surface, or entering pipe interiors, shall be
blown off with clean, dry, oil-free compressed air without affecting other
clean pipes or pipes to be coated. When
compressed air cleaning facilities are not available, vacuum cleaning may be
used. Contractor may use foam inserts to stop the ingress of blast media and
any other contaminants.
7.13 Cleaned pipe surfaces shall not be allowed
to flash rust before coating. Any pipes
not coated with the primer coat within four (4) hours after blasting and not
coated with the complete coating system within eight (8) hours after blasting
shall be reblasted.
7.14 Any raised slivers, scabs, laminations or
bristles of steel remaining on newly cleaned pipe surfaces shall be removed.
8. COATING APPLICATION
The complete coating system shall be a minimum 5.2 mm
thickness.
8.1 Primer Application
Primer shall be consist of a chlorinated rubber and
plasticizer material in accordance with BS 4147 and BS 4146 Type “B”.
The steel surface temperature shall be at least 3oC
above dewpoint and greater than 10oC. Temperature, dewpoint and relative humidity
shall be determined in accordance with ASTM-E-337. Measurements are required at the start of
every shift and every four hours thereafter. If pipe is pre-heated then record
data for information only.
Primer application shall be full and even coverage and as
per manufacturer’s recommendations.
Minimum and maximum allowable primer drying time, between
application of primer and coating, shall be in accordance with primer
manufacturer's instructions, but not greater than four hours between abrasive
blasting and coal tar enamel application.
Primer coats shall be uniform and free from floods, runs,
sags, or drips.
Suitable measures shall be taken to prevent dust or moisture
contamination of wet primer, and to protect the primer from track marks due to
pipe handling equipment.
8.2 Enamel Application
The asphalt enamel shall be Grade B according to BS 4147 and
shall be supplied complete with inert non-fibrous filler and shall exhibit the
characteristics presented in BS 4147.
The tests specified in BS 4147 shall be performed on at
least 1 sample selected from every melting kettle of enamel. If the enamel is supplied in bulk as a hot
liquid, a sample shall be taken from each tank and the tests performed on equal
mixtures of at least three such samples. One sample per kettle will be tested
for Penetration and Softening Point
The first batch of asphalt enamel material at the start of
production and every fifth batch CONTRACTOR shall test the filler content,
relative density, and flash point for BS 4147 compliance.
If block enamel is used, it shall be broken into pieces of
no more than 5 kg prior to loading into the kettles.
Enamel heating kettles shall be equipped with accurate and
easily read thermometers, mechanically agitated, and covered with proper
lids. CONTRACTOR shall provide recording
thermometers on heating kettles.
Temperature recording charts will constitute the basis for accepting or
rejecting all heated enamel.
Enamel shall be thoroughly melted and brought up to
application temperature without exceeding the manufacturer’s maximum allowable
temperature, and shall be re-heated as per the manufacturer’s recommendations.
Minimum application temperature shall be as follows:
·
180°C if the pipe temperature is above 15°C.
·
200°C if the pipe temperature is less than
15°C
Enamel that has been heated in excess of maximum allowable
temperature or has been held at application temperature in excess of the time
specified by the enamel manufacturer, or has not been agitated, shall be
removed from the kettle, disposed of and the kettle cleaned prior to
recharging.
Hot enamel shall be passed through a filter of maximum 3 mm
mesh size prior to being drawn from the melting kettle.
Primed pipe surfaces shall be touch dry at the time enamel
is applied. Primed pipe surface
temperature shall be at least 3oC above dewpoint or greater than 10oC,
whichever is greater, at the time of application.
Temperature, dewpoint and relative humidity shall be
determined in accordance with ASTM-E-337.
Measurements are required at the start of the shift and every four hours
thereafter.
Enamel shall be applied by spirally spraying or flooding to
provide a continuous defect free coat.
The weld seam (if applicable) shall be specifically checked
for thickness. An additional line of
enamel may be applied on the primed pipe if necessary to ensure the specified
thickness is obtained over the seam.
CONTRACTOR shall take care to ensure there is no damage to
the hot and vulnerable coated pipe while the coating is still soft. The completed coatings shall be cooled down
prior to handling and inspection.
The enamel coating shall be cut back 260±12
mm from each end of the pipe. There
shall be no primer on the cut-back region.
The coating immediately adjacent to the uncoated pipe shall be beveled
at an angle of approximately 45º.
All coated joints, other than those that will be immediately
concrete coated or stored undercover, shall be whitewashed to reduce solar heat
damage. The whitewash mixture shall meet
AWWA C-203, Section 3.11. Whitewash may
be applied by spray brush or other COMPANY-approved methods.
8.3 Fiberglass Inner-Wrap Application
There shall be two (2) fiberglass inner wrap layers.
The inner-wrap shall be non-woven fiberglass tissue,
comprising a uniformly porous mat of chemically resistant hydrolitic
glass. The glass fiber monofilaments
making up the mat shall be in random arrangements, bonded with phenolic type
resin compatible with hot asphalt enamel.
Continuous longitudinal filament glass yarn to provide longitudinal
reinforcement shall be embodied in the mat a maximum 30 mm centers.
The inner-wraps shall conform to AWWA C203-86 (Section A2)
and ASTM D-146 and it shall exhibit the following properties.
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Weight
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Minimum 42 g/m2
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Thickness
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Minimum 0.30 mm
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Binder Content
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Maximum 15% by weight
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Porosity
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Maximum 1.9 mm WG
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Tensile Strength
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Minimum 100 N/50 mm of width along reinforcement
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Minimum 30 N/50 mm of width across reinforcement
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Temperature Resistance*
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Minimum 65 N/50 mm of width across reinforcement
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Appearance
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Uniform
smooth surface free from dirt and visible defects
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*Defined
as tensile strength after 2 minutes in suitable heat transfer medium at 260°C.
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The inner-wrap shall be packaged so as to prevent the
ingress of moisture and to comply with the requirements of AWWA C203-86
The wraps shall be applied concurrently with the coating in
a spiral and have an overlap minimum of 25 mm. Successive rolls of wrap shall
have sufficient overlap to ensure good coverage All fibers and reinforcing
strands shall be completely saturated by asphalt enamel. Sufficient tension shall be applied to the
glass mat to embed it in the outer coating half.
Fiberglass shall never be pulled through the hot coating to
the metal surface. There shall be no fiberglass wrap within the bottom 2.0 mm
of coating and a minimum thickness of 1.0 mm of asphalt enamel between each
inner wrap and between the inner-wrap and outer-wrap
The wraps shall have a neat and smooth appearance. These shall be no trapped air and no
wrinkles, buckles or other defects.
8.4 Enamel Impregnated Fiberglass Outer-wrap
Application
The outer-wrap shall comply with the requirements of AWWA
Standard C-203 and shall be applied concurrently with the asphalt enamel in a
spiral with a minimum overlap of 25mm
The outer wrap shall consist of a glass fiber tape, which
meets the requirements of Section 8.3 of this Specification, saturated with a
plasticized asphalt enamel. The enamel
shall be fully compatible with the asphalt enamel specified in Section 8.2 of
this Specification.
The finish outer-wrap shall have the following properties
and comply to AWWA C203-86:
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Weight
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Minimum 585-730 g/m2
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Thickness
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Minimum 0.76 mm
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Tensile Strength
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Minimum 300 N/50 mm of width
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Appearance
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Uniform smooth surface free from dirt and visible defects
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The outside surface of the outer-wrap shall be treated with
approved mineral powder in sufficient quantity to prevent sticking in the
roll. The inner surface of the wrap
shall be as free as possible of the mineral powder.
The width of the outer-wrap shall be selected to be optimal
for the pipe diameter being coated, and shall not be less than 150 mm.
The packaging and sampling requirements
for testing shall be as stated in Section 8.3 of this Specification.
9. COATING INSPECTION
The following test and inspection frequencies represent the
minimum requirement to be performed by CONTRACTOR. Additional tests shall be performed on
COMPANY request.
9.1 CONTRACTOR
shall verify each batch of enamel material complies with manufacturer’s ring
and ball and softening point certification. These tests can be carried out
during production and any material not in compliance shall be rejected.
9.2 CONTRACTOR
shall inspect freshly coated pipes as they leave the coating station. The following conditions shall be cause for
rejection:
·
Separation of fiberglass wrap and
asphalt enamel.
·
Appearance of grease, oil, loose mill
scale or any other foreign matter on coated surfaces.
·
Voids in the coating
·
Insufficient enamel bleed-through
·
Failure of cured coatings to properly
adhere to pipe surfaces.
·
Failure of coatings to meet any other
aspect set forth in this specification.
9.3 Surface
temperature and environmental conditions shall meet the manufacturer’s
specified application requirements at each stage of the coating process. If
pipe is pre-heated data will be recorded for information only.
9.4 Coating
thickness shall be a minimum of 5.2mm
9.5 CONTRACTOR
shall inspect the entire surface of all joints of pipe with a certified
COMPANY-approved high voltage holiday detector, equipped with a positive
audible and visual signaling device to indicate any flaws, holes, breaks or
conductive particles in the applied anti-corrosion coatings. The electrode shall be a steel spring or
conductive rubber.
Holiday detector shall be set at 15,000 volts and the output
shall be checked every four (4) hours, or upon noticeable humidity change, with
a calibrated voltage meter on a control coated pipe with known holidays.
CONTRACTOR shall test all coatings at a speed of less than
0.3 m per second immediately after application, for any discontinuities,
holidays and pinholes, in strict accordance with NACE RP-02-74. All holidays detected shall be immediately circled
with a waterproof crayon contrasting with the coating color.
9.6 CONTRACTOR
shall repair all holidays and damaged spots, in accordance with Section 10.0,
prior to loading out coated pipes for transport to storage.
9.7 All
holidays indicated in a joint shall be marked, repaired and re-tested with a
holiday detector as per AWWA C203-86
9.8 CONTRACTOR
shall cut samples from 1 in 20 coated pipe or at least 1 pipe every 2 hours to
check for continuity, correct placement of layers, thickness and adhesion to
the pipe. This inspection frequency can be reduced with Company’s approval.
9.9 If
the coating thickness, measured in at least five places on each pipe does not
meet this specification, those pipes shall be rejected, and CONTRACTOR shall
take necessary measures to ensure that an increased coating thickness is
achieved on remaining pipes.
9.10 Coating
shall be visually inspected for defects.
CONTRACTOR shall repair all defects as approved by COMPANY.
9.11 Adhesion
tests shall be performed on one in ten (10) joints. Using a knife, heated if
necessary, two parallel cuts 30 mm apart and 100 mm long shall be made through
the coating thickness to the pipe surface, in the circumferential direction
around the pipe. With a stiff flat
blade, the full width of the wrap shall be loosened between the two cuts and
the wrap lifted upwards in a direction at right angles to the pipe surface.
This inspection frequency can be reduced with Company’s approval.
The bond is considered satisfactory if the coating does not
peel cleanly from the primer or the pipe surface but is removed with difficulty
causing cohesive failure within the coating.
Should any pipe fail the test, the proceeding and succeeding
10 joints shall be tested until a 10% batch is found to be acceptable. In no case shall time between tests be more
than two (2) hours. These tests shall
also be conducted after every major kettle shutdown and at the start of every
shift. All pipes failing this test shall
be stripped and recoated. Failures shall
be immediately reported to COMPANY.
CONTRACTOR shall repair all test areas in accordance with
Section 10.
10. COATING REPAIRS
All coating defects, test areas or other imperfections shall
be repaired. Repaired areas shall then
be re-inspected for holidays in accordance with Section 9.5.
10.1 Pipe
areas requiring small spot repairs shall be cleaned by surface grinders or
other suitable means to remove dirt, scale and damaged coating. Adjacent coating shall be feathered, and all
dust removed.
Surface preparation is not required for pinholes, other than
removing surface dirt, oil, grease and other detrimental contaminants that
impair repair material adhesion.
Large repairs through to the steel or primer surface will
require fresh preparation of the steel surface to ST3 standards.
10.2 For
pinpoint or bubble type holidays, the glass fiber outer-wrap shall be removed
with a sharp knife taking care not to damage the enamel. Heated enamel shall be poured over the area
to specified thickness and covered with one patch of glassfiber outerwrap, with
its edges pressed firmly against parent coating such that the entire glassfiber
patch is bonded to the enamel.
10.3 For
fractured or scuffed coating, all disbonded enamel shall be removed down to the
steel and the remaining edges beveled to sound enamel firmly bonded to the
pipe. The surface shall be cleaned to
ST3 standard and reprimed. After primer
has dried, hot enamel shall be applied to the area to specified thickness and
covered with glass fiber mat as in Section 10.2.
10.4 For
repair of areas greater than five percent of pipe diameter in length or width,
a full cigarette wrap of glassfiber outerwrap shall be made around the pipe
circumference. A flood coat of properly
heated enamel shall bond the entire glassfiber mat to the original coating and
also seal the wrap edges and overlap.
10.5 Pipes
with major coating defects such as unbonded coating, inadequate coating
thickness or partially coated joints shall be set aside for a COMPANY decision
to repair or reprocess.
11. IDENTIFICATION AND MARKING
CONTRACTOR shall maintain pipe identification throughout the
coating process. If pipe identification
is removed during coating, it shall be replaced in a COMPANY approved manner,
to ensure no pipe loses its unique number or heat number. Any pipe that cannot be positively identified
to COMPANY satisfaction shall be rejected and replaced.
11.1 Pipe
number and length shall be applied 100 mm from coating ends, inside the pipe at
each end. Letters and numerals shall be
of adequate size. For internally coated
pipe, bevels should have die stamped numbers to ensure identification using a
round soft-nosed die. The stamping marks shall be 50mm clear of any welded
seam.
11.2 All
markings shall be stenciled and spray applied with a paint compatible with the
coating material, and of a contrasting color.
12. RECORDS
CONTRACTOR shall maintain complete pipe records, from the
time they first enter the coating yard until completion of coated pipe load
out, including pipe length and date of anti-corrosion coating application. All test and inspection records shall be
signed by CONTRACTOR and approved by COMPANY and shall be compiled into a
databook for submission when coating is complete.
All data shall be submitted to COMPANY in both hard copy and
electronic format
13. HANDLING AND STORAGE OF COATED PIPES
Asphalt enamel coated pipe shall handled in accordance with
Project Specification for Handling, Storage and Transportation of Linepipe
(84506-60-30-2L-270) at all times, to avoid coating damage.
13.1 Coated
pipes, when cool and / or cured, shall be moved by lifting the uncoated ends or
by rolling on padded runners. Other
coated pipe handling and moving methods, such as the use of dollies or buggies,
may be used subject to COMPANY approval.
13.2 If
not adequately quenched prior to rolling hot-coated pipes may be moved by
rolling them on smooth runners that contact only uncoated pipe ends.
13.3 Asphalt
enamel coated pipe shall not be stacked more than three tiers high and each
joint to have gunnysacks encircling the entire circumference located at three
points. Each joint shall be supported adequately to limit bearing pressure at
the contact point. No two asphalt enamel
coated pipes shall be allowed to touch during storage.
14. SHIPMENT OF COATED PIPES
14.1 All
harmful substances, dirt, steel shot and other debris shall be removed from
inside pipes before shipping. All excess
coating found inside and on the cutback and bevel end of pipe shall be
completely removed.
14.2 Each
pipe shall be supported on contoured and padded bolsters to limit bearing
pressure and avoid coating deformation and damage while pipes are in
transit. There shall be no contact
between adjacent asphalt enamel coated pipes.
15. DOCUMENT SUBMITTALS
CONTRACTOR shall submit to COMPANY for approval, 30 days
prior to receipt of linepipe, the following documents:
a.
Coating Application Procedures
b.
Handling, Transportation and Storage
Procedures
c.
Inspection and Testing Procedures
CONTRACTOR shall submit to COMPANY for approval throughout
the execution of work, the following documents:
a.
Material Test Certificates
b.
Certified Test and Inspection Reports
c.
Calibration Records
d.
Tally Record of Pipes Received, Coated
/ Loaded Out
All certificates shall be in the English language and use
metric units of measure. CONTRACTOR and
COMPANY shall visibly sign certificates.