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

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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Status
Historical
Publication Date
14-Mar-1991
Current Stage
Ref Project

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ASTM F1330-91(2001) - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 1330 – 91 (Reapproved 2001)
Standard Guide for
Metallic Abrasive Blasting to Descale the Interior of Pipe
This standard is issued under the fixed designation F 1330; 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 3.2 Thisguideisrecommendedforremovingmillscale,rust
scale, paints, zincs, and oxides.
1.1 This guide covers metallic abrasive blasting to descale
the interior of carbon steel pipe.
4. General Requirements
1.2 This guide is recommended for use in conjunction with
4.1 Before blasting, pipe shall be dry and free of slag and
an abrasive reclamation system.
weldspatterwhichwouldnotberemovedbyabrasiveblasting.
1.3 The values stated in SI units are to be regarded as the
Pipe shall also be free of loose dust and debris which might
standard. The values given in parentheses are for information
hamper the effectiveness of abrasive blasting.
only.
4.2 Abrasive blasting shall be accomplished in a dry area
1.4 This standard does not purport to address all of the
with the ambient air condition such that condensation does not
safety concerns, if any, associated with its use. It is the
occur.
responsibility of the user of this standard to establish appro-
4.3 Shot and blasting equipment shall be stored at a tem-
priate safety and health practices and determine the applica-
perature not less than −13°C (10°F) above the dew point of the
bility of regulatory limitations prior to use.
surrounding area.
2. Referenced Documents 4.3.1 Abrasive reclamation system shall include a filtration
system capable of removing oxides, debris, dust, shot/grit
2.1 ASTM Standards:
fragments, and fines.
D2200 PictorialSurfacePreparationStandardsforPainting
4.4 Compressed air system shall be equipped with moisture
Steel Surfaces
removal devices capable of reducing the dew point of the air at
E18 Test Methods for Rockwell Hardness and Rockwell
the nozzle to −18°C (approximately 0°F) or less.
Superficial Hardness of Metallic Materials
4.5 Hoses shall have the maximum practical diameter and
2.2 SAE Standards:
shall be as short as possible.
J444 Cast Shot and Grit Size Specifications for Peening
4.6 Nozzles shall have the maximum possible aperture as
Cleaning
determined by the capacity of the blast equipment and as
J827 Cast Steel Shot
limited by the pipe diameter.
2.3 Other Documents:
5 4.7 Internal pipe cleaning nozzle assemblies are commer-
SSPC SP10 Surface Preparation Specifications
cially available and shall be used where required.
SFSA 20-66 Standard Specification for Cast Steel Abra-
6 4.7.1 Internal pipe cleaning nozzle assemblies shall include
sives
a carriage which is capable of centering the nozzle concentri-
3. Significance and Use callyinthepipebeingblastedandanozzlewhichiscapableof
producing a consistent 360° blast pattern.
3.1 Themaximumlengthandminimumdiameterofthepipe
4.7.2 Diagrams of some commercially available internal
shall be determined by the capacity of the blast equipment
pipe cleaning assemblies are provided in Figs. 1-4.
used.
4.7.3 If a lance is required, it shall be at least as long as the
pipe being blasted.
This guide is under the jurisdiction of ASTM Committee F25 on Ships and
4.8 Blasting shall be accomplished using an abrasive mix-
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
ture of cast steel shot and grit, or with iron shot or grit.
Machinery and Piping Systems.
Current edition approved March 15, 1991. Published October 1991. 4.8.1 Iron or grit may be used if desired.
Annual Book of ASTM Standards, Vol 06.02.
4.8.2 Cast steel shot and grit mixtures shall be sized in
Annual Book of ASTM Standards, Vol 03.01.
accordance with SAE J444.
Available from Society of Automotive Engineers, 400 Commonwealth Dr.,
4.8.3 Reclaimedshotandgritshallbeofthesamequalityas
Warrendale, PA 15096.
Available from Steel Structures Painting Council (SSPC), 4400 Fifth Ave.,
the original material.
Pittsburgh, PA 15213.
Available from Steel Founders Society of America (SFSA) Cast Metals
Federation Building, 20611 Center Ridge Rd., Rocky River, OH 44116.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
F 1330 – 91 (2001)
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
...

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