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.  
1.4 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-Apr-2012
Current Stage
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ASTM F1330-91(2012) - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:F1330 −91 (Reapproved 2012) An American National Standard
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
used.
1.2 This guide is recommended for use in conjunction with
an abrasive reclamation system. 3.2 Thisguideisrecommendedforremovingmillscale,rust
scale, paints, zincs, and oxides.
1.3 The values stated in SI units are to be regarded as the
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
weldspatterwhichwouldnotberemovedbyabrasiveblasting.
safety concerns, if any, associated with its use. It is the
Pipe shall also be free of loose dust and debris which might
responsibility of the user of this standard to establish appro-
hamper the effectiveness of abrasive blasting.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 4.2 Abrasive blasting shall be accomplished in a dry area
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-
D2200Practice 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.
E18Test 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.
J444Cast 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 SP10Surface 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.
This guide is under the jurisdiction of ASTM Committee F25 on Ships and
4.7 Internal pipe cleaning nozzle assemblies are commer-
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
cially available and shall be used where required.
Machinery and Piping Systems.
Current edition approved May 1, 2012. Published May 2012. Originally
4.7.1 Internal pipe cleaning nozzle assemblies shall include
approved in 1991. Last previous edition approved in 2006 as F1330–91 (2006).
a carriage which is capable of centering the nozzle concentri-
DOI: 10.1520/F1330-91R12.
callyinthepipebeingblastedandanozzlewhichiscapableof
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
producing a consistent 360° blast pattern.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4.7.2 Diagrams of some commercially available internal
the ASTM website.
pipe cleaning assemblies are provided in Figs. 1-4.
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
4.7.3 If a lance is required, it shall be at least as long as the
Dr., Warrendale, PA 15096-0001, http://www.sae.org.
Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor, pipe being blasted.
Pittsburgh, PA 15222-4656, http://www.sspc.org.
4.8 Blasting shall be accomplished using an abrasive mix-
Available from Steel Founders’Society ofAmerica (SFSA), 780 McArdle Dr.,
Unit G, Crystal Lake, IL 60014, http://www.sfsa.org. ture of cast steel shot and grit, or with iron shot or grit.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
F1330−91 (2012)
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 %
Manganese 0.60 to 1.00 %
Silicon 0.50 to 1.00 %
FIG. 1 For 20- to 50-mm (Approximately ⁄4- to 2-in.) Inside Diam-
Sulfur <0.05 %
eter Pipe 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
40 to 60 RC
structural steel
A
Courtesy of Steel Structures Painting Council.
B
Itisextremelyimportantthatcontractualdocumentswhichspecifyabrasivetobe
used clearly designate the abrasive by size and by hardness.
C
Both cast steel shot and grit of hardnesses in the range from 30 to 66 Rockwell
Cmaybepurchased.However,theabrasivesoflessthan40RCandgreaterthan
FIG. 2 For 50- to 125-mm (Approximately 2- to 5-in.) Inside Diam- 60 RC are generally used for applications other than surface preparation of
structural steel.
eter Pipe
D
Abrasive manufacturers identify steel grit by designations which include two or
moreprefixletters,followedbythenumbersize.Prefixlettersaredifferentforeach
of the abrasive suppliers for any given hardness range.
4.10 Cast steel grit shall be manufactured in accordance
with SFSA 20-66 and tempered to a hardness of 55-65
Rockwell C in
...

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