ASTM A950/A950M-99
(Specification)Standard Specification for Fusion Bonded Epoxy-Coated Structural Steel H-Piles and Sheet Piling
Standard Specification for Fusion Bonded Epoxy-Coated Structural Steel H-Piles and Sheet Piling
SCOPE
1.1 This specification covers structural steel H-piles and sheet piling with protective epoxy coating applied by the electrostatic spray, flocking, or fluidized bed process. Note 1-The coating applicator is identified throughout this specification as the manufacturer.
1.2 Other organic coatings may be used provided they meet the requirements of this specification.
1.3 Requirements for coatings are contained in Annex A1.
1.4 This specification is applicable for orders in either inch-pound units (as Specification A950) or SI units [as Specification A950M]. The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. This specification is applicable for orders in either SI units or inch-pound units.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 950/A 950M – 99
Standard Specification for
Fusion-Bonded Epoxy-Coated Structural Steel H-Piles and
Sheet Piling
This standard is issued under the fixed designation A 950/A 950M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope A 857 Specification for Steel Sheet Piling, Cold-Formed,
Light Gage
1.1 This specification covers structural steel H-piles and
B 117 Practice for Operating Salt Spray (Fog) Apparatus
sheet piling with protective fusion-bonded epoxy coating
D 2200 Pictorial Surface Preparation Standards for Painting
applied by the electrostatic spray, flocking, or fluidized bed
Steel Surfaces
process.
D 3451 Practices for Testing Polymeric Powders and Pow-
NOTE 1—The coating applicator is identified throughout this specifica- 4
der Coatings
tion as the manufacturer.
G 8 Test Methods for Cathodic Disbonding of Pipeline
1.2 Requirements for coatings are contained in Annex A1.
Coatings
1.3 This specification is applicable for orders in either
G 12 Test Method for Nondestructive Measurement of Film
inch-pound units (as Specification A 950) or SI units (as
Thickness of Pipeline Coatings on Steel
Specification A 950M). The values stated in either inch-pound
G 14 Test Method for Impact Resistance of Pipeline Coat-
or SI units are to be regarded separately as standard. Within the
ings (Falling Weight Test)
text, the SI units are shown in brackets.
G 20 Test Method for Chemical Resistance of Pipeline
1.4 This standard does not purport to address any of the
Coatings
safety concerns, if any, associated with its use. It is the
2.2 American Petroleum Institute Specification:
responsibility of the user of this standard to establish appro-
API RP 5L7 Recommended Practice for Internal Fusion
priate safety and health practices and determine the applica-
Bonded Epoxy Coating of Line Pipe
bility of regulatory limitations prior to use.
2.3 National Association of Corrosion Engineers Standard:
TM0175 Visual Standard for Surfaces of New Steel Cen-
2. Referenced Documents
trifugally Blast Cleaned with Steel Shot or Steel Grit
2.1 ASTM Standards:
(Nace No. 2)
A 6/A6M Specification for General Requirements for
2.4 Steel Structures Painting Council Standards:
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
SSPC VIS 1 Visual Standards
Piling
SSPC-SP 1 Surface Preparation Specification No. 1: Sol-
A 36/A36M Specification for Carbon Structural Steel
vent Cleaning
A 328/A328M Specification for Steel Sheet Piling
SSPC-SP 10 Near-White Blast Cleaning
A 572/A572M Specification for High-Strength Low-Alloy
3. Ordering Information
Columbium-Vanadium Structural Steel
A 588/A588M Specification for High-Strength Low-Alloy
3.1 Information items to be considered, if appropriate, for
Structural Steel with 50 ksi [345 MPa] Minimum Yield
inclusion in purchase orders are as follows:
Point to 4 in. [100 mm] Thick
3.1.1 Specification designation and year of issue for H-pile
A 690/A690M Specification for High-Strength Low-Alloy
or sheet piling,
Steel H-Piles and Sheet Piling for Use in Marine Environ-
3.1.2 Section,
ments
Annual Book of ASTM Standards, Vol 03.02.
1 4
This specification is under the jurisdiction of ASTM Committee A-1 on Steel, Annual Book of ASTM Standards, Vol 06.02.
Stainless Steel, and Related Alloys and is under the direct responsibility of Available from the American Petroleum Institute, 1220 L St., Washington, DC
Subcommittee A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and 20005.
Ships. Available from the National Institute of Corrosion Engineers, 1440 South
Current edition approved Sept. 10, 1999. Published November 1999. Originally Creek, Houston, TX 77084.
published as A 950/A 950–95. Last previous edition A 950/A 950M-98. Available from the Steel Structures Painting Council, 4400 5th Ave., Pittsburgh,
Annual Book of ASTM Standards, Vol 01.04. PA 15213.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 950/A 950M – 99
3.1.3 Quantity, 5. Surface Preparation
3.1.4 Length,
5.1 Prior to blast cleaning, the surfaces of steel H-piles and
3.1.5 Portions to be coated (full length or distance from end
sheet piling to be coated shall be precleaned, as required, in
to remain bare),
accordance with SSPC-SP1. Steel surfaces shall be cleaned by
3.1.6 Requirements for certifications (see 13.1),
abrasive blast cleaning to near-white metal in accordance with
3.1.7 Requirements for material samples (see 4.3), SSPC-SP10. The cleaning media used shall produce an anchor
3.1.8 Requirements for patching material sample (see 4.5), pattern profile of 1.5 mils to 4.0 mils [40 to 100 μm]. The visual
standard of comparison used to define the final surface condi-
3.1.9 Requirements for visual standard of comparison for
tion shall be SSPC-VIS1 or TM0175. Expended blasting media
surface cleaning (see 5.1),
debris and dust shall be removed from blasted surfaces prior to
3.1.10 Requirements for number and frequency of tests (see
applying coating.
8.1), and
5.2 Prior to application of the fusion-bonded epoxy coating,
3.1.11 Requirements for inspection at the manufacturing
raised slivers, scabs, laps, sharp edges, or seams shall be
plant (see 11.1).
removed using abrasive grinders. No individual area of grind-
2 2
NOTE 2—An example of an ordering description is as follows: Struc-
ing shall exceed 36 in. [230 cm ]. Total area of grinding shall
tural steel sheet piling, Grade 60, Type 1, to ASTM 572 – ; section PZ35,
not exceed 1 % of total surface area.
20 000 ft, 40 ft, 0 in. long in secured lifts, epoxy-coated to ASTM A 950– ,
5.3 Slivers raised during the cleaning or coating application
including certification for coated sheet piling, sample of coating material,
process shall be treated as permissible coating damage and
2 gal of patching material, and surface cleaning comparison with
SSPC-VIS 1. repaired per Section 10.
[Structural steel sheet piling, Grade 400, Type 1, to ASTM 572M – ;
5.4 It shall be permissible for a chemical wash and/or
section PZ35, 6000 m, 12 m long in secured lifts, epoxy-coated to ASTM
conversion of the steel H-piles or sheet piling surface to be
A 950M– , including certification for coated sheet piling, sample of
used. This pretreatment shall be applied after abrasive blast
coating material, 8 L of patching material, and surface cleaning compari-
cleaning and before coating, in accordance with the written
son with SSPC-VIS 1].
application instructions specified by the pretreatment manufac-
turer.
4. Materials
6. Application of Coating
4.1 Steel H-piles to be coated shall meet the requirements of
Specifications A 36/A 36M, A 572/A 572M, A 588/A 588M, or
6.1 The powder coating shall be applied to the cleaned and
A 690/A 690M, whichever is specified in the order. Steel sheet
pretreated (if applicable) surface as soon as possible and before
piling to be coated shall meet the requirements of Specifica-
visible oxidation of the surface occurs, as discernible to a
tions A 328/A 328M, A 572/A 572M, A 690/A 690M, or
person with normal or corrected vision. In no case shall
A 857/A 857M, whichever is specified in the order.
application of the coating be delayed more than 3 h after
cleaning.
NOTE 3—Surface conditions such as slivers, gouges, laminations, pits,
6.2 To achieve the required coating thickness (see 7.1), the
and sharp edges can cause coating application difficulties and effort should
be made to hold these conditions to a minimum. steel shall be preheated prior to applying the powder coating in
accordance with the manufacturer’s written recommendations.
4.2 The coating material shall meet the requirements listed
The heat source shall not leave a residue or contaminant on the
in Annex A1 and shall be approved by the purchaser.
steel surfaces. If oxidation occurs, the steel shall be cooled to
4.2.1 A written certification shall be furnished to the pur-
ambient temperature and recleaned before applying the powder
chaser that properly identifies the batch designation of the
coating.
powder coating used in the order, material, quantity repre-
6.3 The powder coating shall be applied and cured in
sented, date of manufacture, name and address of manufac-
accordance with the powder coating manufacturer’s written
turer, and a statement that the supplied powder coating is the
recommendations.
same composition as that prequalifed to Annex A1 of this
6.4 Areas of steel sections not requiring coating to allow
specification. The powder coating shall be used within the
welding or for other purposes shall be specified by the
manufacturer’s written recommended shelf life.
purchaser and shall be blocked-out during the coating applica-
4.3 If specified in the order, a representative 8-oz. [0.2-kg]
tion.
sample from each batch of the powder coating shall be supplied
7. Requirements for Coated H-Piles and Sheet Piling
to the purchaser. The sample shall be packaged in an airtight
container and identified by the batch designation.
7.1 Thickness of Coating:
4.4 The powder coating shall be maintained in a
7.1.1 The minimum thickness of coating after curing on flat
temperature-controlled environment following the written rec-
surfaces of H-piles and sheet piling shall be 12 mils [300 μm].
ommendations of the powder coating manufacturer until ready
The minimum thickness of coating after curing on edges and
for use, at which point the powder coating will be given corners of sections, as measured on flat surfaces ⁄2 in. [13 mm]
sufficient time to reach approximate plant ambient temperature.
from these edges and corners of sections, shall be a minimum
4.5 The patching material shall be as recommended by the of 7 mils [175 μm]. It shall be permissible for the coating
powder coating manufacturer and shall be compatible with the thickness to be reduced on the ball and socket of sheet piling.
coating. If specified in the order, a sample of the patching 7.1.2 Measurements shall be made in accordance with Test
material shall be supplied to the purchaser. Method G 12 following the instructions for calibration and use
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 950/A 950M – 99
recommended by the thickness gage manufacturer. Gages shall 7.3.2 No cracking or disbonding of the coating on the
be of the pull-off or fixed probe type, except that “pencil-type” outside radius of the test panels shall be discernible to a person
pull-off gages, which require the operator to observe the with normal or corrected vision. Except as specified in Section
readings at the instant the magnet is pulled from the surface, 9, cracking or disbonding of the coating shall be cause for
shall not be used. rejection of the coated H-piles or sheet piling represented by
7.1.3 Thickness measurements on test sheet piling sections the bend test panels.
shall be taken on flat surfaces and corners of each side and edge 7.3.3 Fracture or failure of the steel in the bend test shall not
at 2 ft [0.6 m] intervals along piling sections. Thickness be considered a failure of the coating. Another test panel from
measurements on test H-piles shall be taken alternately on the the same production lot shall be substituted for repeat testing.
edges of flanges, outside and inside of flat surfaces of flanges, 7.4 All requirements for coated H-piles and sheet piling
intersection of flanges and web, and on each side of the web at shall be met at the manufacturer’s plant prior to shipment.
2 ft intervals along H-pile sections.
8. Number of Tests
NOTE 4—Powder coating overspray at interlock segments of sheet
8.1 Unless a higher number or higher frequency, or both, is
piling is inherent to the coating process and should be considered to be
acceptable. A heavier coating thickness in these areas may result in the
specified in the order, one test for coating thickness, continuity,
inability to join pieces.
and flexibility shall be made once every 4 h.
7.2 Continuity of Coating:
9. Retests
7.2.1 Damaged or deficiently coated areas, as discernible to
a person with normal or corrected vision, shall be patched in
9.1 If any test specimen for coating thickness, continuity, or
accordance with the patching manufacturer’s written recom-
flexibility fails to meet the specified requirements, two further
mendations.
coated specimens from the same lot shall be subjected to the
7.2.2 The applied coating after curing shall not have more
test or tests in which the original sample failed. If both
than an average of two holidays (pinholes not discernible to a
additional coated test specimens pass the retest, the lot from
person with normal or corrected vision) per square foot [21
which they were taken shall be deemed to meet the require-
holidays per square metre] of the coated section,as determined
ments of this specification. If either of them fails, the lot shall
by dividing the total number of holidays for the individual
be deemed not to comply with this specification.
section checked by its total outside surface area.
9.2 If the lot does not comply with this specification, the lot
7.2.3 Holiday checks to determine acceptability shall be
immediately preceding and immediately following the non-
made only at the manufacturers plant with a 67.5-V direct
compliant lot shall have two test pilings selected from them
current, 80 000–V wet sponge holiday detector.
which shall be subjected to the test or tests in which the
7.2.4 Holiday checks on test sheet piling sections shall be
original pilings failed. If all test pilings pass the retests, the lots
made on flat surfaces and corners of each side and edge at 2 ft
shall be deemed in compliance with this specification.
[0.6 m] intervals along piling sections. Holiday checks on test
9.3 In the case of a second non-compliant lot, the untested
H-piles shall be taken alternately on the edges of flanges,
lot immediately next to it, which may be preceding or
outside and inside of flat surfaces of flanges, intersection of
following, shall be subjected to a retest. This procedure shall be
flanges and web, and on each side of the web at 2 ft intervals
repeated until a compliant lot is tested.
along pile sections.
NOTE 6—In the use of the retest provision of this specification, a lot i
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.