USACE / NAVFAC / AFCESA / NASA UFGS-09 97 13.28 (April 2006)
------------------------------
Preparing Activity: NAVFAC Replacing without change
UFGS-09 97 13.28 (September 2000)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 09 97 13.28
PROTECTION OF BURIED STEEL PIPING AND STEEL BULKHEAD TIE RODS
04/06
NOTE: This guide specification covers the requirements for exterior protection
tape wrapping systems.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: This guide specification covers the requirements and application methods
for tape wrapping systems that establish exterior protection of buried steel
piping and steel bulkhead tie rods which rest above the reference level, 600
mm 2 feet below Mean Low Water (M.L.W) or Mean Lower Low Water (M.L.L.W.), and
for tape coating of buried steel pipe covered with an adhesive thermoplastic
resin coating system, a thermosetting epoxy coating system, or a polyethylene-butyl
adhesive system. These protective systems are suitable for steel surfaces which
have continuous operating temperatures not exceeding 60 degrees C 140 degrees
F. An adhesive thermoplastic resin coating system is available in a high temperature
system capable of service up to 88 degrees C 190 degrees F (see paragraph entitled
"Adhesive-Thermoplastic Resin Coating System").
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[AMERICAN WATER WORKS ASSOCIATION (AWWA)AWWA C209(2006) Cold-Applied Tape Coatings for the Exterior of Special Sections, Connections and Fitting for Steel Water PipeAWWA C213(2007) Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel Water PipelinesAWWA C214(2007) Tape Coating Systems for the Exterior of Steel Water Pipelines][NACE INTERNATIONAL (NACE)NACE RP0274(2004) High Voltage Electrical Inspection of Pipeline Coatings][U.S. DEPARTMENT OF DEFENSE (DOD)MIL-I-631(Rev D; Am 1-6) Insulation, Electrical, Synthetic-Resin Composition, Nonrigid][U.S. GENERAL SERVICES ADMINISTRATION (GSA)FS L-C-530(Rev C) Coating, Pipe, Thermoplastic Resin]1.2 DEFINITIONS
1.2.1 Coating
A continuous, uniformly thick layer formed on a surface by the mechanical application of a liquid, mastic, powdered,
or extruded film material. Some types of application require elevated temperatures.
1.2.2 Coating System
One or more coatings applied to a properly prepared steel surface. If only one coating, that coating is applied
directly to the steel surface; if more than one coating, each coating is applied in one operation over the previously
applied and cured coating. For some applications, the first coating is a primer. Coatings of a particular system
function together as a collective entity to protect the steel surface from corrosion. Coating system may be either
liquid or tape applied.
1.2.3 Tape
Prefabricated laminate of plastic film backing with a homogeneous sealant layer or a pressure-sensitive adhesive
layer produced in sheets, pads, or rolls wound on hollow cores. Tape applications do not require elevated temperatures.
1.2.4 Tape Coating System
One or more layers of tape applied cold over a properly prepared and primed steel surface. Tape on the primed
surface protects the steel surface from corrosion.
1.3 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-03 Product Data
Factory-applied coating system
Field-applied epoxy coating system
Thermosetting epoxy coating system
Polyethylene-Butyl Adhesive Coating System
Adhesive Thermoplastic Resin Coating System
Tape Coating System
Electrical-flaw detector
[Mastics]
[Rock shield]
[SD-06 Test Reports
Inspector's certificate
Submit for each inspection and test.
Field-applied epoxy coating]
SD-08 Manufacturer's Instructions
Field-applied epoxy coating system
Thermosetting epoxy coating system
Electrical-flaw detector
[Mastics]
[Rock Shield]
PART 2 PRODUCTS
2.1 MATERIALS
2.1.1 Tape Coating System (TCS)
NOTE: Use of M.L.W. or M.L.L.W. should be based upon the usage by a particular
Activity. Selection may be based on the datum for each Activity contained in
Table 1-4, "Tide Data for Naval Activities"; of DM-26.1 "Harbor and Coastal
Facilities." If the design does not include tie rods, delete those portions
of the first sentences that refer to tie rods, M.L.W., and M.L.L.W.
NOTE: Factory-applied coating with field machine-applied coatings at joints
and damaged areas is the preferred method. If the work is a small retrofit
or repair, factory applied coatings may be too restrictive. Irregular surfaces
such as tees, valve bodies, and flanges are done by hand.
NOTE: The thicknesses of inner and combined tape are designed for moderately,
and severely corrosive soil environments. For lightly corrosive soil environment
use thickness specified for moderately corrosive soil environment.
NOTE: Tape applied at a temperature below 10 degrees C 50 degrees F should
be suitable for cold weather application down to -12 degrees C 10 degrees F.
Delete if application is going to be above 10 degrees C 50 degrees F.
Prefabricated tape with adhesive primer [for bulkhead tie rods and turnbuckles] [and] [for use on [pipe,] couplings,
damaged areas and fittings]. The tape wrapping system shall conform to AWWA C209 and to MIL-I-631, Class I for
fungus resistance, except that the fungus rating shall lie between zero and one for all specimens. The overall
thickness of the tape wrap protection shall be not less than [0.75] [1.12] [_____] mm [30] [45] [_____] mils.
[The tape system shall be suitable to be applied at temperatures below 10 degrees C 50 degrees F and above -12
degrees C 10 degrees F.]
2.1.2 Adhesive Thermoplastic Resin Coating System (ATRCS)
Steel pipe factory-applied coating system conforming to FS L-C-530and coating manufacturer's instructions shall
consist of a continuously extruded polyethylene coating [, capable of withstanding operating temperatures up
to 88 degrees C 190 degrees F,] applied on an adhesive undercoat.
2.1.3 Thermosetting Epoxy Coating System (TECS)
NOTE: Use only epoxy coatings where petroleum fuels are expected.
Factory-applied steel pipe system conforming to AWWA C213. Provide field-applied epoxy coating in accordance
with manufacturer's recommendations and AWWA C213.
2.1.4 Polyethylene-Butyl Adhesive Coating System (PBACS)
Factory-applied steel pipe system of extruded butyl adhesive compound, 0.18 mm 7 mils minimum thickness, covered
with overlapping layers of extruded polyethylene wrapping, one mm 38 mils minimum thickness, in accordance with
AWWA C214.
[2.1.5 Mastics
NOTE: Mastic coatings are brush applied. Mastics are used on irregular surfaces
such as bolted flanges and valve bodies where the tape will not directly contact
exposed surfaces. Show surfaces that will require mastic coatings on drawings.
Delete if surfaces are smooth and round.
Apply a coating of manufacturer approved mastic protection to irregular surfaces. Mastic shall be compatible
with coating system. [Apply the tape system over mastic.] Mastic layer thickness shall conform to coating manufacturer's
recommendation.
][2.1.6 Rock Shield
NOTE: Rock shields are used where coarse rock backfill or rocky soil conditions
may damage the tape coating.
Provide rock shield over completed coating system as recommended by coating manufacturer.
]PART 3 EXECUTION
3.1 INSTALLATION
3.1.1 TCS
3.1.1.1 Surface Preparation
Surfaces shall be clean and dry. Wire brush weld beads, and remove weld spatters. Remove heavy rust or mill
scale with wire brush.
3.1.1.2 Application
Remove paper from Kraft paper-protected material before placing in final position. Reinforce coating at sling
points with roofing felt or other approved heavy shielding material, or handle with nylon or canvas slings.
Apply polyvinylchloride-butyl rubber laminated tape or pressure-sensitive organic plastic tape and its adhesive
primer by single machine operation.
a. Pipe: Spirally wrap straight runs in one layer, lapping the tape as applied. Overlap shall
conform to recommendations of the tape manufacturer. When an outerwrap is used, overlap of
outerwrap shall bridge joints of the tape. Apply at each end of straight runs a double wrap
of one full width of tape at right angles to the axis in such a manner so as to seal ends of
spiral wrapping.
b. Pipe Joints and Couplings and Damaged Areas of Coatings: Clean joint areas which are to
be taped, of burrs and rust. Smooth down or cut away damaged coating when not firmly bonded
to pipe. Spirally wrap with a two-layer wrapping system, overlapping coating surface at least
75 mm 3 inches. Initially stretch tape sufficiently to conform to the surface to which it
is applied, using one layer half-lapped for tape 50 mm 2 inches or less in width or one layer
lapped at least 25 mm one inch for tape more than 50 mm 2 inches wide. Apply a second layer,
lapped as above, with tension as tape comes off roll, and press to conform to shape of component.
For other irregular surfaces such as bolted flanges valve bodies where tape coating system containing
mastics is to be provided, apply with brush.
c. Tie Rods and Tie Rod Fittings: Spirally wrap with a two-layer coating system. Apply tape
to tie rods by lapping each layer of tape using a half-lap for tape 50 mm 2 inches or less in
width or at least a 25 mm one inch lap for tape more than 50 mm 2 inches wide. For tie rod
fittings, initially stretch tape sufficiently to conform to the surface to which it is applied,
using one layer half-lapped for tape 50 mm 2 inches or less in width or one layer lapped at
least 25 mm one inch for tape more than 50 mm 2 inches wide. Apply a second layer, lapped as
before, with a tension as tape comes off the roll, and press to conform to the shape of component.
3.1.2 Joints, and Other Irregular Surfaces For ATRCS
Prepare surface as described in paragraph entitled "TCS." Wrap tape as specified in paragraph entitled "TCS";
except, apply the tape half-lapped, and prime extruded polyethylene coating and adhesive undercoat surfaces to
be tape wrapped with a compatible primer as recommended by the tape manufacturer and approved by the extruded
polyethylene coating applicator for use on the polyethylene coating.
3.1.2.1 Damaged Areas
Repair damaged areas of the extruded polyethylene coating by tape wrapping as specified under the paragraph,
entitled "Tape Coating System" except press residual material from the extruded polyethylene coating into the
break, or trim off. Prime areas to be taped prior to applying half-lapped tape.
3.1.3 TECS
NOTE: Use only epoxy coatings where petroleum products are expected.
Install in accordance with the manufacturer's instructions and AWWA C213.
3.1.3.1 Joints
Clean both sides of weld area by wire brushing, and remove dust, moisture, and other contaminants. Apply primer
recommended by coating manufacturer after cleaning of joints.
3.1.3.2 Damaged Areas
Remove damaged coating by abrading, filing, or wire brushing. Clean area to be repaired free of dust, moisture,
and other contaminants. Cover with a primer and a coating recommended by coating manufacturer. Apply coating
over cleaned surface, and extend approximately 75 mm 3 inchesbeyond damaged area.
3.1.4 Joints and Other Irregular Surfaces For PBACS
Clean both sides of weld area by wire brushing, and remove dust, moisture, and other contaminants. Apply primer
recommended by tape manufacturer and acceptable to coating manufacturer on cleaned area. Apply tape spirally
with a 50-percent overlap in accordance with the tape manufacturer's instructions.
3.1.4.1 Damaged Areas
Remove rough or protruding polyethylene from damaged area by abrading, filing, or cutting the material. Clean
area to be repaired free of dust, moisture, and other contaminants. Cover with tape recommended by coating manufacturer
and primer recommended by tape manufacturer. Apply primer over cleaned surface, and extend approximately 75 mm
3 inches beyond damaged area. Apply tape over primer, and extend 25 mm one inch beyond damaged area. Apply
additional primer over tape patch. Spirally wrap additional tape around pipe with a 50-percent overlap to cover
tape patch, and extend a minimum of 50 mm 2 inches beyond the edge of the patch.
3.2 FIELD QUALITY CONTROL
NOTE: Require a certified inspector where the scope and cost of the project
warrants. When editing Section 01 45 02 NAVFAC QUALITY CONTROL, ensure that
the qualification of inspector required below is coordinated.
Conform to AWWA C214 [and AWWA C213]. [Inspection shall be performed by a National Association of Corrosion
Engineers (NACE) certified inspector].
3.2.1 Field Inspection
Examine material surface preparation and application proceduresperformed in the field.
3.2.2 Field Test
Test the protective system for holes, voids, cracks, and other visually undetectable damage that may occur during
handling and installation in accordance with NACE Standard NACE RP0274. In critical applications no holidays
will be permitted. In non critical applications up to 10 holidays per meter 3 holidays per linear feet of the
pipe may be accepted. Test with an approved electrical-flaw detector in accordance with the detector manufacturer's
printed instructions. Prepare inspector's certificate for each inspection and test. Repair areas where arcing
occurs and retest.