Ax040014 45 Ak
Ax040014 45 Ak
Ax040014 45 Ak
This document contains proprietary and confidential information National Oilwell Varco
which belongs to National-Oilwell Varco, L.P., its affiliates or Rig Solutions
subsidiaries (all collectively referred to hereinafter as "NOV"). It is Pressure Control Group
loaned for limited purposes only and remains the property of NOV.
Reproduction, in whole or in part, or use of this design or
distribution of this information to others is not permitted without the 6390 N. Eldridge Parkway
express written consent of NOV. This document is to be returned to Houston TX 77041
NOV upon request and in any event upon completion of the use for
which it was loaned. This document and the information contained Phone +1 (832) 424-6000
and represented herein is the copyrighted property of NOV.
National Oilwell Varco 2012
AX040014 AK
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NOV PCG Form EF-004 Rev 0
REVISION HISTORY
AN
AM
AL
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TABLE OF CONTENTS
1 SCOPE .............................................................................................................................. 6
5 APPLICATION ................................................................................................................ 16
10 DEVIATIONS ................................................................................................................... 26
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1 SCOPE
1.1 This Specification describes paint systems designed to resist a broad range of
environments providing tough, durable, abrasion and chemical resistant coatings.
1.2 The specification is written for use at all PCG original equipment manufacturing
locations and repair locations. It is understood the repair facilities may not be
capable to perform all the testing or have a NACE II or III inspector on hand. For
both new and repaired equipment, this procedure should be followed as closely as
possible with any deviations reported on RigDocs form 101210943 (MGF-003).
1.3 Specification AX040014 does not cover paint systems requiring NORSOK M-501
certification. Please see specification AX040013 for NORSOK specifications
when the Sales Order requires NORSOK M-501 certification.
1.4 The colors used by NOV PCG on Shaffer products shall be identified by the
numbering systems assigned by Federal Standard No. 595C or RAL for paint
colors.
1.5 Protective coatings shall be applied to all Shaffer products prior to shipment,
either to a customer or to another shop for further fabrication unless otherwise
specified by the customer in his purchase order or the shop work order.
1.6 The drawing callout for the correct paint specification shall be “AX040014, Paint
System ‘X’, Color Code ‘XX’.” On parts where the Paint System and/or Color are
either missing from the drawing or specified differently than the Purchase Order,
the requirement in the Purchase Order shall take precedence. The Paint System
and color in the Purchase Order will reflect the customer’s requirement from the
Sales Order.
2.1.1 For PCG new equipment, RigDocs form 101210943 (MGF-003) In-process,
Coating Application Form must be completed for every PCG work order
requiring adherence to PCG coating specification AX040014 unless
otherwise specified.
2.1.2 For Aftermarket and Painting Vendors, either the MGF-003 or vendor’s in-
house coating form containing all the minimum requirements listed in
Section 7.2 may be supplied.
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2.3.1 ASTM D1640 Test Methods for Drying, Curing or Film Formation of
Organic Coatings at Room Temperature.
2.3.2 ASTM D2697 Test Methods for Non-volatile Matter, in Clear or Pigmented
Coatings.
2.3.3 ASTM D3359 Standard Test Method Measuring Adhesion by Tape Test
2.3.4 ASTM D4541 Standard Test Method for Pull-Off Strength of Coatings
Using Portable Adhesion Testers
2.3.5 ASTM D4940 Standard Test Method for Conductimetric Analysis of Water
Soluble Ionic Contamination of Blast Cleaning Abrasives
2.3.6 ASTM D4414 Standard Practice for Measurement of Wet Film Thickness
by Notch Gages.
2.3.7 ASTM D4285 Standard Test Method for Indicating Oil or Water in
Compressed Air.
2.3.8 ASTM D4417 Test Methods for Field Measurement of Surface Profile of
Blast Cleaned Steel
2.3.10 ASTM D4752 Standard Practice for Measuring MEK Resistance of Ethyl
Silicate (inorganic) Zinc-Rich Primers by Solvent Rub.
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2.4.1 ISO 8502-6 Extraction for Soluble Contaminants for Analysis – The Bresle
Method
2.4.2 ISO 8502-9 Field Method for Soluble Salts by Conductometric
Measurement
2.4.3 ISO 8502-3 Part 3: Assessment of dust on steel surfaces prepared for
painting (pressure-sensitive tape method)
2.5.1 The following colors identified by the Federal Standard 595C and RAL
Standard Colors shall be used for Shaffer products and shall be identified
by the Color Code Number. Color Codes are applicable to finish coats
only.
RAL
Federal
Color Color Code Standard
Standard
Number Color
595C Number
Number
White 01 7925 9003
Yellow 02 3591 1018
Blue 03 5092 5015
Red 04 1350 3001
Gray 05 6314 7042
Logo Blue 06 5056 NA
Orange 07 2473 2003
Cream 08 3711 NA
Green 09 4110 6001
Red-CCC 287 10 NA NA
Yellow 11 NA 1028
Black 12 NA 9005
2.5.3 Either Federal Standard or RAL numbers may be used to identify colors
stated in the Sales Order.
2.5.4 The finish shall be flat on all Epoxy paint and shall be gloss on all
polyurethane paint. If Federal Standard 595C numbers are specified, a “3”
prefix may be used for flat finish and a “1” prefix for gloss finish.
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WARNING: For color consistency, top coats on single project components MUST
BE of the same coating brand and product (Jotun/Sherwin Williams/
Carboline/ PPG/International). It is preferred that the primer and
intermediate coats layers be the same coating brand (Jotun/Sherwin
Williams/Carboline/ PPG) as the top coat. However, should a mistake
occur, brand mixing of the top coat may be accepted so long as the top
coat is specified for the CORRECT COATING SYSTEM.
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NOTES:
(a)
Existing supplies of Resist 18WF may be used for PCG System 1 until depleted.
(b)
Telescoping Joint inner barrels must only be primed . No top coats. DFT must be
3 – 4 mils.
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NOTES:
(a)
Existing supplies of Zinc Clad XI may be used for PCG System 1 until depleted.
(b)
Telescoping Joint inner barrels must be primed only. No top coats. Use Zinc Clad II.
DFT must be 3 – 4 mils.
(c)
Duraplate 235 may be used as the top coat in colors other than white.
(d)
If RAL 1018 (yellow) is specified, specify special product #B67YW0236.
(e)
If RAL 1028 (yellow) is specified, specify special product #B67YW0237.
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NOTES:
(a)
Telescoping Joint inner barrels must be primed only. No Top Coats. Use Carbozinc
11. DFT must be 3 – 4 mils.
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NOTES:
(a
) Telescoping Joint inner barrels must be primed only. No top coats. Use Dimetcote 9.
DFT must be 3 – 4 mils.
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Volume % Solids 70 82 -
NOTES:
(a)
Existing supplies of Zinc Clad XI may be used for PCG System 1 until depleted.
(b)
Telescoping Joint inner barrels must be primed only. No top coats. Use Zinc Clad II
DFT must be 3 – 4 mils.
(c)
The intermediate coat of Interseal 670HS must be a grind batch. The top coat will be
tinted to the proper color.
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5 APPLICATION
5.1 Preparation
5.1.2 For adhesion testing, a .250” x 12” x 12” test panel shall be provided for
each work order or large component. The test panel will be blasted and
coated along with the components being coated. For smaller parts where
more than one work order is being painted at once, a single test panel
maybe used for a painted group of parts.
5.1.3 Surface Cleanliness: Gloves, boot covers, or other coverings shall be used
as necessary to prevent contaminating prepared or coated surfaces before
application of subsequent coats of material.
a. ring grooves
b. end connections
c. hydraulic ports
d. threaded holes
e. seal surfaces
f. bearing bores
g. close tolerance pin holes
h. exposed ram shafts
i. coated surfaces like: Xylan, Everslick, SermaGard, Plating,
etc.
5.2.2 All parts are to be grit blasted to remove all scale, rust, corrosion and
foreign matter.
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5.2.2.1 All grit blasted parts are to be blasted to near white metal per
SSPC-SP10 Sa-2 ½ minimum to produce the anchor profile
shown in the Section 4 paint system charts. Abrasive medium
shall be selected to yield the required anchor profile.
5.2.2.2 Blasting: Before and after blasting, the metal surface temperature
shall be at least 5°F above the measured dew point. A minimum
of 90 psig shall be maintained at the blast nozzle. The first coat
shall be applied within 4 hours of blasting.
5.2.2.3 If rust bloom forms after blasting, the affected area shall be re-
blasted before application of the first coat.
NOTE: Blast air must be free of oil, water, and other contaminants.
5.2.2.6 After blasting, remove all residual grit by blowing with clean, dry
compressed air and/or by brushing.
5.2.3 When preparing stainless steel, duplex or super duplex components that
are to be coated, the surface shall be prepared in the same manner as
described in this section, but metallic abrasives shall not be used. When
using mineral abrasives such as aluminum oxide for example, the supplier
shall ensure iron oxide is not a part of the abrasive mixture.
5.2.4.1 Use the ISO 8502-3 pressure sensitive tape method to test
surface cleanliness. The steel surface must not exceed a Dust
Quantity Rating of 2 or the requirement in the coating
manufacturer’s product application guide.
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NOTE: In areas where relative humidities are very low (less than
50%) IOZ will not cure. In those areas Zinc-Rich Epoxy shall
be used as the primer.
5.3.1.3 When powder and liquid are packaged separately, gradually stir
powder into liquid. Total contents of each are to be mixed
together until powder is well dispersed and mixture is free of
lumps.
5.3.1.4 Strain mixture into paint pot with a 30-mesh screen to prevent
clogging of equipment.
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5.3.1.6 Adjust spray equipment to apply an even wet coat with minimum
overspray.
5.3.2.1 For Inorganic Zinc Primer, a cure test shall be performed prior to
the application of the intermediate coat, to ensure the IOZ primer
is sufficiently cured before top coating. This test shall be
performed in accordance with ASTM D4752, Standard Test
Method for Measuring MEK Resistance of Ethyl Silicate
(Inorganic) Zinc-Rich Primers by Solvent Rub (latest revision).
The minimum acceptance Resistance Rating per Table 1 shall be
a 4. There will be a slight burnished appearance in the rubbed
area and a slight amount of zinc may be on the cloth after 50
double rubs.
A Coin Test may be used in place of the solvent rub test. Use the
edge of a coin approximate the size of a US quarter, 1.00”
(100mm) diameter, and held with both hands to make a 1” long
scrape once onto the surface of the primer. The coin shall
produce a metallic shiny mark without any removal or loosening
of the zinc. Coin test to be completed at three positions on each
component.
5.3.2.2 For Zinc Rich Epoxy Primer, the film must be free of solvent, hard
and firm. When rubbed with a finger or the face of a coin or knife
the film should polish but not distort, flake or chip.
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5.3.3.1 For PCG Coating System 2 only, the primed surface must be
sanded to remove excess dried overspray or other contaminants
that might have accumulated on the surface prior to over-coating.
Use 200 mesh sandpaper or abrasive screen to lightly sand the
surface. Remove all sanding dust with an air jet and/or vacuum.
, Use the ISO 8502-3 pressure sensitive tape method to test
surface cleanliness. The primed surface must not exceed a Dust
Quantity Rating of 2. If ISO 8502-3 tape is not available a visual
check can be by a single clean hand wipe or dark cloth wipe to
see that there is no dust remaining on the surface.
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NOTE: When manufacturing and machine tolerances will not allow for
all three coats of paint on mating parts without inhibiting
assembly of those parts, then it is acceptable to apply the
primer coat plus a 2 – 3 mils top coat in those areas.
5.3.6.1 Mist coating must be done for all PCG System 2 (Subsea) coating
systems and should be done for PCG System 1 inorganic zinc
primer. Mist coating is not required for PCG System 3.
5.3.6.2 Surface to be coated shall be dry, and free of dirt, grease or other
contamination prior to application of intermediate coat. Use the
tests described in 5.3.5.2 to insure the remaining dust is minimal.
5.3.6.4 Apply a mist coat of intermediate paint thinned with 30% thinner
and allow the thinner to “flash off”. The mist coat is to prevent
pin-holing.
5.3.7.1 Surface to be coated shall be dry, and free of dirt, grease or other
contamination prior to application of intermediate coat.
5.3.7.2 When coating stainless parts, the intermediate coat will be the
first coat. The surface must be sandblasted and prepared as
described in the previous section.
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5.3.7.5 Resin and curing solutions are packaged separately. Stir each
component thoroughly and then combine total contents of each
can and mix until uniform. Follow inductions times when required
per Product Data Sheets recommendations.
5.3.7.6 After insuring that the mist coat has flashed off all the excess
thinner. apply one or two wet coats in even, parallel passes,
overlapping each pass 50%.
5.3.7.7 Drying time is affected by atmospheric conditions and coating
thickness. Follow Product Data Sheet recommendations.
5.3.8.1 Insure that the intermediate coat DFT + primer DFT millage
meets the requirement Section 4.
NOTE: In the event that parts are to be assembled prior to the finish
coat being applied, the mating surfaces will be sufficiently
protected by the primer and intermediate coats and will not
require the finish coat on those surfaces.
5.3.10.1 Surface to be coated shall be dry, and free of dirt, grease or other
contamination prior to application of finish coat.
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5.3.10.4 Apply one or two wet coats in even, parallel passes, overlapping
each pass 50%.
5.3.11.1 Insure that the total DFT meets the requirements shown in
Section 4.
5.3.11.2 Perform coating adhesion tests on the test panel per ASTM
D4541. Record the average of three tests. The average must
exceed the minimum allowable provided by the paint
manufacturer.
6.1 Paint personnel performing rework, repair, and/or touch-up of a damaged finish
coat shall verify the following:
6.1.1 Dry Film Thickness (DFT) prior to performing any rework, repair, and
touch-up. If DFT mils are above the total DFT mils required inform Paint
Supervision for further instruction.
6.1.2 Paint System and/or Color Code per Sales Order or Purchase Order for
correct coating application. If not specified or unsure of paint system or
color code get with Paint Supervision for further instruction.
6.1.3 For Touch-Up, complete the PCG Coating Application Form MGF-003
Touch-Up Coat Section.
6.1.4 For repairs of larger surfaces where blasting or paint removal to bare metal
and a recoat of all 2 or 3 coats is required, complete PCG Coating
Application Form MGF-003 sections for complete coatings where
applicable. The testing required, and the data retained and recorded will
be determined by the NACE III inspector on sight.
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6.2.1 Areas with damage or blemishes that involve only the intermediate and
finish coats shall be pressure washed with detergent and rinsed or solvent
cleaned before mechanically roughing (sanding) the surface to provide an
anchor pattern to hold the paint. Solvent wipe all foreign matter that will
interfere with adhesion.
6.2.2 Surface preparation for areas damaged to the base metal shall be pressure
washed with detergent and rinsed or solvent cleaned. Abrasive blasting is
the preferred method of surface preparation, however if blasting of small
areas is not feasible, use mechanical abrasion tools to achieve SSPC-SP
11 and a minimum 2.0 mil anchor profile as specified in section 5.2.2.1.
Feather the edges of the existing coating around the damage area back to
sound coating material. Solvent wipe all foreign matter that will interfere
with adhesion. Solvent and rags must be cleaned and changed frequently.
6.2.3 Measure the salt content on the surface. The maximum allowable value is
20 mg/m2 (ISO 8502-6/9).
Note: Zinc rich epoxy primer will be used for smaller repairs where
damage is down to bare metal. Inorganic zinc primer must not be
applied over any existing coated surface.
6.3 Application
6.3.1 Coating materials for rework, repair and touch-up shall be the same as
used in the original coating system. However, for areas damaged down to
bare metal or where low areas of DFT exist within the inorganic zinc
primer, zinc rich epoxy primer shall be used for corrections.
6.3.2 For repair of the intermediate and top coat damage as described in 6.2.1,
intermediate and finish coat materials shall be used to build the Total DFT
mils required and shown in the Coating System Selection Chart.
6.3.3 For repair of larger damaged areas as described in 6.2.2, all three coats,
including inorganic or reinforced inorganic zinc primer, should be applied to
the prepared metal. Excess inorganic zinc must be sanded off the existing
coating material before the intermediate and finish coats are applied to
build the total DFT mils required and shown in the Coating System
Selection Chart. This process may leave a small space of bare metal
between coating and inorganic zinc primer. This space can be simply over-
coated with the intermediate coat to the proper DFT or may be striped with
zinc rich epoxy primer or the intermediate coat paint.
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7.1 Personnel performing QC and those applying the coating are responsible for
following this specification.
7.2 NOV PCG paint personnel will complete a Coating Report, RigDocs form
101210943 (MGF-003). Coating vendors must complete a coating report; use
MGF-003 or internal form that contains the following MGF-003 requirements as a
minimum:
7.3 Quality Control personnel will be responsible for inspecting final dry film thickness
and overall integrity of the coating system per SOP 7.003 and 7.019. Quality Control
personnel will also be responsible for reviewing completed the coating report and
sign or stamp and date once reviewed. When the final dry film thickness is below
spec, the unacceptable areas are to receive an additional coat to conform to the
specified minimum thickness. If the final dry film thickness exceeds the range
allowed, an NCR shall be processed per SOP 7.005 for disposition.
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8 CONTRACTOR/VENDOR REQUIREMENTS
8.2 NOV PCG may perform quality assurance (QA) inspection of all surface
preparation and coating application at any time. The contractor/vendor must
provide a Coating Report containing the information per section 7.2 from a NACE
Coating Inspector Level 1, SSPC Protective Coatings Inspector Level 1 or
FROSIO Inspector Level 2 or equal, at a minimum. Additionally, the Contractor
must provide a Certificate of Compliance (C of C) before or at the time of delivery
of the coated equipment.
8.3 Contractor shall bear the cost of any rework required when coated equipment is
found to be outside the acceptance criteria of this specification.
Note: Upon request Copies of all procedures, the job scope, including when and
where the work will occur must be provided to NOV PCG inspector prior to
beginning any task.
9.1 All prospective coating products must be approved by NOV PCG Engineering who
will verify the requirements of this specification are met.
9.2 All prospective coating applicators must be approved by NOV PCG Quality
Assurance who will verify the requirements of this specification are met.
10 DEVIATIONS
10.1 No deviations from this specification are allowed unless specifically agreed to in
writing by NOV PCG Engineering.
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