Standard Guide for Metallic Abrasive Blasting to Descale the Interior of Pipe

SIGNIFICANCE AND USE
The maximum length and minimum diameter of the pipe shall be determined by the capacity of the blast equipment used.
This guide is recommended for removing mill scale, rust scale, paints, zincs, and oxides.
SCOPE
1.1 This guide covers metallic abrasive blasting to descale the interior of carbon steel pipe.
1.2 This guide is recommended for use in conjunction with an abrasive reclamation system.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Historical
Publication Date
30-Nov-2006
Current Stage
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ASTM F1330-91(2006) - Standard Guide for Metallic Abrasive Blasting to Descale the Interior of Pipe
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: F1330 – 91 (Reapproved 2006)
Standard Guide for
Metallic Abrasive Blasting to Descale the Interior of Pipe
This standard is issued under the fixed designation F1330; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 This guide covers metallic abrasive blasting to descale 3.1 Themaximumlengthandminimumdiameterofthepipe
the interior of carbon steel pipe. shall be determined by the capacity of the blast equipment
1.2 This guide is recommended for use in conjunction with used.
an abrasive reclamation system. 3.2 Thisguideisrecommendedforremovingmillscale,rust
1.3 The values stated in SI units are to be regarded as the scale, paints, zincs, and oxides.
standard. The values given in parentheses are for information
4. General Requirements
only.
4.1 Before blasting, pipe shall be dry and free of slag and
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the weldspatterwhichwouldnotberemovedbyabrasiveblasting.
Pipe shall also be free of loose dust and debris which might
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- hamper the effectiveness of abrasive blasting.
4.2 Abrasive blasting shall be accomplished in a dry area
bility of regulatory limitations prior to use.
with the ambient air condition such that condensation does not
2. Referenced Documents
occur.
2.1 ASTM Standards: 4.3 Shot and blasting equipment shall be stored at a tem-
D2200 Practice for Use of Pictorial Surface Preparation perature not less than −13°C (10°F) above the dew point of the
Standards and Guides for Painting Steel Surfaces surrounding area.
E18 Test Methods for Rockwell Hardness of Metallic Ma- 4.3.1 Abrasive reclamation system shall include a filtration
terials system capable of removing oxides, debris, dust, shot/grit
2.2 SAE Standards: fragments, and fines.
J444 Cast Shot and Grit Size Specifications for Peening 4.4 Compressed air system shall be equipped with moisture
Cleaning removaldevicescapableofreducingthedewpointoftheairat
J827 Cast Steel Shot the nozzle to −18°C (approximately 0°F) or less.
2.3 Other Documents: 4.5 Hoses shall have the maximum practical diameter and
SSPC SP10 Surface Preparation Specifications shall be as short as possible.
SFSA 20-66 Standard Specification for Cast Steel Abra- 4.6 Nozzles shall have the maximum possible aperture as
sives determined by the capacity of the blast equipment and as
limited by the pipe diameter.
4.7 Internal pipe cleaning nozzle assemblies are commer-
This guide is under the jurisdiction of ASTM Committee F25 on Ships and
cially available and shall be used where required.
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
4.7.1 Internal pipe cleaning nozzle assemblies shall include
Machinery and Piping Systems.
Current edition approved Dec. 1, 2006. Published January 2007. Originally
a carriage which is capable of centering the nozzle concentri-
approved in 1991. Last previous edition approved in 2001 as F1330–91 (2001).
callyinthepipebeingblastedandanozzlewhichiscapableof
DOI: 10.1520/F1330-91R06.
producing a consistent 360° blast pattern.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4.7.2 Diagrams of some commercially available internal
Standards volume information, refer to the standard’s Document Summary page on
pipe cleaning assemblies are provided in Figs. 1-4.
the ASTM website.
4.7.3 If a lance is required, it shall be at least as long as the
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
pipe being blasted.
Dr., Warrendale, PA 15096-0001, http://www.sae.org.
Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,
4.8 Blasting shall be accomplished using an abrasive mix-
Pittsburgh, PA 15222-4656, http://www.sspc.org.
ture of cast steel shot and grit, or with iron shot or grit.
Available from Steel Founders’Society ofAmerica (SFSA), 780 McArdle Dr.,
4.8.1 Iron or grit may be used if desired.
Unit G, Crystal Lake, IL 60014, http://www.sfsa.org.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
F1330 – 91 (2006)
A,B
TABLE 1 Steel Shot and Grit Specifications
Property Shot Grit
Size:
New abrasive as All material is screened to meet or exceed SAE J444
manufactured and SFSA 20-66.
Chemistry:
Carbon 0.85 to 1.20 %
FIG. 1 For 20- to 50-mm (Approximately ⁄4- to 2-in.) Inside
Manganese 0.60 to 1.00 %
Diameter Pipe
Silicon 0.50 to 1.00 %
Sulfur <0.05 %
Phosphorus <0.05 %
Microstructure:
Uniformly tempered martensite, with fine, well-distributed carbides, if any.
Carbide networks, transformation products, decarburized surfaces,
inclusions, and quench cracks are undesirables.
Hardness:
D
Commonly used 40 to 50 RC 40 to 50 RC
C
structural steel 40 to 60 RC
A
Courtesy of Steel Structures Painting Council.
B
It is extremely important that contractual documents which specify abrasive to
be used clearly designate the abrasive by size and by hardness.
FIG. 2 For 50- to 125-mm (Approximately 2- to 5-in.) Inside
C
Bothcaststeelshotandgritofhardnessesintherangefrom30to66Rockwell
Diameter Pipe
Cmaybepurchased.However,theabrasivesoflessthan40RCandgreaterthan
60 RC are generally used for applications other than surface preparation of
structural steel.
D
Abrasivemanufacturersidentifysteelgritbydesignationswhichincludetwoor
moreprefixletters,followedbythenumbersize.Prefixlettersaredifferentforeach
of the abrasive suppliers for any given hardn
...

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