ASTM A660-96(2010)
(Specification)Standard Specification for Centrifugally Cast Carbon Steel Pipe for High-Temperature Service
Standard Specification for Centrifugally Cast Carbon Steel Pipe for High-Temperature Service
ABSTRACT
This specification covers carbon steel pipe made by the centrifugal casting process intended for use in high-temperature, high-pressure service. This pipe shall be suitable for fusion welding, bending, and other forming operations. Grades for carbon steels shall conform to the required chemical composition for carbon, manganese, phosphorous, sulfur, and silicon. Manufacturing of the material shall be done by machining and heat treatment. Pyrometers shall be used to control the furnace temperatures. Tensile properties shall conform to the required values for tensile strength, elongation, and reduction of area. Mechanical properties shall conform to the following: transverse or longitudinal tension test; flattening test; and hydrostatic test.
SCOPE
1.1 This specification covers carbon steel pipe made by the centrifugal casting process intended for use in high-temperature, high-pressure service. Pipe ordered under this specification shall be suitable for fusion welding, bending, and other forming operations.
1.2 Several grades of carbon steels are covered. Their compositions are given in Table 1.
1.3 Supplementary requirements (S1 to S9) of an optional nature are provided. The supplementary requirements call for additional tests to be made, and when desired shall be so stated in the order, together with the number of such tests required.
1.4 The values stated in inch-pound units are to be regarded as the standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: A660 – 96 (Reapproved 2010)
Standard Specification for
Centrifugally Cast Carbon Steel Pipe for High-Temperature
Service
This standard is issued under the fixed designation A660; 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 (´) indicates an editorial change since the last revision or reapproval.
TABLE 1 Chemical Requirements
1. Scope
Composition, max,%
1.1 This specification covers carbon steel pipe made by the
Grade WCA Grade WCB Grade WCC
centrifugal casting process intended for use in high-
A B
temperature, high-pressure service. Pipe ordered under this
Carbon 0.25 0.30 0.25
A B
Manganese 0.70 1.00 1.20
specification shall be suitable for fusion welding, bending, and
Phosphorus 0.035 0.035 0.035
other forming operations.
Sulfur 0.035 0.035 0.035
1.2 Several grades of carbon steels are covered. Their Silicon 0.60 0.60 0.60
A
compositions are given in Table 1.
Foreachreductionof0.01%belowthespecifiedmaximumcarboncontent,an
increase of 0.04 % manganese above the specified maximum will be permitted up
1.3 Supplementary requirements (S1 to S9) of an optional
to a maximum of 1.10 %.
nature are provided. The supplementary requirements call for
B
Foreachreductionof0.01%belowthespecifiedmaximumcarboncontent,an
additional tests to be made, and when desired shall be so stated increase of 0.04 % manganese above the specified maximum will be permitted to
a maximum of 1.40 %.
in the order, together with the number of such tests required.
1.4 The values stated in inch-pound units are to be regarded
as the standard.
2.2 ANSI Standards:
2. Referenced Documents
B36.10 American Standard for Welded and Seamless
Wrought Steel Pipe
2.1 ASTM Standards:
B46.1 Surface Texture
A530/A530M Specification for General Requirements for
2.3 MSS Standards:
Specialized Carbon and Alloy Steel Pipe
SP-54 Quality Standard for Steel Castings—Radiographic
E94 Guide for Radiographic Examination
Inspection Method
E114 Practice for Ultrasonic Pulse-Echo Straight-Beam
Contact Testing
3. Ordering Information
E125 Reference Photographs for Magnetic Particle Indica-
3.1 Orders for material under this specification should
tions on Ferrous Castings
include the following, as required, to describe the desired
E142 Method for Controlling Quality of RadiographicTest-
material adequately:
ing
3.1.1 Quantity (feet, metres, or number of lengths),
E186 Reference Radiographs for Heavy-Walled (2 to 412-
3.1.2 Name of material (centrifugally cast pipe),
in. (50.8 to 114-mm)) Steel Castings
3.1.3 Grade (Table 1),
E381 Method of Macroetch Testing Steel Bars, Billets,
3.1.4 Size (outside or inside diameter and minimum wall
Blooms, and Forgings
thickness),
E446 Reference Radiographs for Steel Castings Up to 2 in.
3.1.5 Length (specific or random), (Permissible Variations
(50.8 mm) in Thickness
in Length Section of Specification A530/A530M),
3.1.6 End finish (Ends Section of Specification A530/
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
A530M),
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.1.7 Optional Requirements (Sections 7.2, 8.2, 8.3, 11.1,
A01.18 on Castings.
Section 12 and S1 to S9 (Supplementary Requirements),
Current edition approved April 1, 2010. Published May 2010. Originally
approved in 1972. Last previous edition approved in 2005 as A660 – 96 (2005).
DOI: 10.1520/A0660-96R10.
For ASME Boiler and Vessel Code applications see related Specification
SA-660 in Section II of that Code. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036, http://www.ansi.org.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
Standards volume information, refer to the standard’s Document Summary page on Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
the ASTM website. hq.com.
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A660 – 96 (2010)
3.1.8 Test report required (Certification Section of Specifi- 8.1.2 Transverse or Longitudinal Tension Test—One test
cation A530/A530M), shall be made on a specimen from one end of one length of
3.1.9 Specification designation, and pipe representing each heat in each heat-treatment lot.
3.1.10 Special requirements. 8.2 Flattening Test:
8.2.1 Aflatteningtestshallbeperformedwhenrequestedby
4. General Requirements the purchaser or when stated by the purchaser on the order that
the pipe is to be upset, swaged, expanded, bent, or formed by
4.1 Material furnished under this specification shall con-
some other operation.
form to the applicable requirements of the current edition of
8.2.2 Aflattening test need not be performed on heavy wall
Specification A530/A530M unless otherwise provided herein.
pipe which is not to be upset, swaged, expanded, bent, or
formed in some other manner.
5. Materials and Manufacture
8.2.3 When required by 8.2, a test shall be made on
5.1 Machining:
specimens cut from one end of each length of pipe.
5.1.1 All centrifugally cast pipe shall have both the inner
8.2.4 A flattening test when required shall be performed in
and outer surfaces machined.
accordance with the requirements for seamless and centrifu-
5.1.2 After heat treatment, the pipe shall be machined to a
gally cast pipe in the Flattening Test Requirements Section of
finish with a roughness value no greater than 250 µin. (6.35
Specification A530/A530M.
µm) arithmetical average deviation (AA), terms as defined in
NOTE 1—In heavy-walled small-diameter tubing the flattening test
ANSI B46.1 unless otherwise specified.
specimenmaybeboredoutsothattheOD/tratiowillbegreaterthan11.0.
5.2 Heat Treatment:
5.2.1 All pipe shall receive a heat treatment proper for its
8.3 Hydrostatic Test:
design and chemical composition.
8.3.1 Each length of pipe shall be hydrostatically tested in
5.2.2 Castings shall be heat treated after they have been
accordance with the Hydrostatic Test Requirements Section of
allowed to cool below the transformation range.
Specification A530/A530M when requested by the purchaser
and stated on the order. If performance of the hydrostatic test
6. Temperature Control
is not required by the purchaser, the manufacturer shall
guarantee pipe to pass the test and mark each length of pipe
6.1 Furnace temperatures for heat treating shall be effec-
with the letters “NH” immediately following the specification
tively controlled by pyrometers.
number, indicating that the pipe has not been hydrostatically
tested.
7. Chemical Requirements
8.3.2 When required by 8.3, each length of pipe shall be
7.1 The steel shall conform to the requirements as to
subjected to the hydrostatic test. The test pressure shall be
chemical composition prescribed in Table 1.
maintained for not less than 5 min.
7.2 Product Analysis:
7.2.1 At the request of the purchaser, a product analysis
9. Permissible Variation in Wall Thickness
shall be made by the manufacturer on every heat.
9.1 The wall thickness shall not vary over the specified
7.2.2 The results of these analyses shall be reported to the
minimum wall thickness by more than 10 %. There shall be no
purchaser or his representative, and shall conform to the
variation under the specified minimum wall thickness.
requirements specified in Table 1.
7.2.3 If the analysis of one of the tests specified in 7.2.1
NOTE 2—A system of standard pipe sizes has been approved by the
does not conform to the requirements specified, an analysis of American National Standards Institute, asANSI B36.10.This system may
be used for obtaining pipe under this specification.
each pipe from the same heat may be made, and all pipes
conforming to the requirements shall be accepted.
10. Workmanship and Finish
10.1 The pipe shall have a finish as provided in 5.2 and it
8. Mechanical Requirements
shall be reasonably straight and free from injurious defects.
8.1 Tensile Properties:
8.1.1 The material shall conform to the requirements as to
11. Rework and Retreatment
tensile properties prescribed in Table 2.
11.1 Imperfections—The surface of the casting shall be
inspectedvisua
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