ASTM A524-96(2001)

Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures

SCOPE
1.1 This specification  covers seamless carbon steel pipe intended primarily for service at atmospheric and lower temperatures, NPS 1/8 to 26 inclusive, with nominal (average) wall thickness as given in ANSI B36.10. Pipe having other dimensions may be furnished, provided such pipe complies with all other requirements of this specification. Pipe ordered to this specification shall be suitable both for welding, and for bending, flanging, and similar forming operations.  
1.2 The values stated in inch-pound units are to be regarded as the standard.
Note 1—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size".
1.3 The following hazard caveat applies to the test methods portion, Section 16, only. This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 09-Oct-2001
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Replaces: ASTM A524-96 - Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures
• Effective Date: 10-Oct-2001
• Replaced By: ASTM A524-96(2005) - Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures
• Effective Date: 01-Oct-2005
• Referred By: ASTM A530/A530M-18 - Standard Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
• Effective Date: 10-Oct-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 524 – 96 (Reapproved 2001)
Standard Specification for
Seamless Carbon Steel Pipe for Atmospheric and Lower
Temperatures
This standard is issued under the fixed designation A 524; 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. Ordering Information
1.1 This specification covers seamless carbon steel pipe 3.1 Orders for material under this specification should
intended primarily for service at atmospheric and lower tem- include the following, as required, to describe the desired
peratures, NPS ⁄8 to 26 inclusive, with nominal (average) wall material adequately:
thickness as given in ANSI B 36.10. Pipe having other 3.1.1 Quantity (feet or number of lengths),
dimensions may be furnished, provided such pipe complies 3.1.2 Name of material (seamless carbon steel pipe),
with all other requirements of this specification. Pipe ordered 3.1.3 Grade (Table 1 and Table 2),
to this specification shall be suitable both for welding, and for 3.1.4 Manufacture (hot finished or cold drawn),
bending, flanging, and similar forming operations. 3.1.5 Size(eithernominalwallthicknessandweightclassor
1.2 The values stated in inch-pound units are to be regarded schedule number, or both, or outside diameter and nominal
as the standard. wall thickness, ANSI B36.10),
3.1.6 Length (17),
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
3.1.7 Optional requirements ( Section 8 and Section 11 of
been substituted in this standard for such traditional terms as “nominal
Specification A 530/A 530M),
diameter,” “size,” and “nominal size”.
3.1.8 Test report required (Certification Section of Specifi-
1.3 The following hazard caveat applies to the test methods
cation A 530/A 530M),
portion, Section 16, only. This standard does not purport to
3.1.9 Specification designation,
address all of the safety concerns, if any, associated with its
3.1.10 End use of material, and
use. It is the responsibility of the user of this standard to
3.1.11 Special requirements.
establish appropriate safety and health practices and deter-
mine the applicability of regulatory limitations prior to use.
4. General Requirements
4.1 Material furnished to this specification shall conform to
2. Referenced Documents
the applicable requirements of the current edition of Specifi-
2.1 ASTM Standards:
cation A 530/A 530M unless otherwise provided herein.
A 530/A 530M Specification for General Requirements for
Specialized Carbon and Alloy Steel Pipe
5. Materials and Manufacture
E 29 Practice for Using Significant Digits in Test Data to
5.1 Process:
Determine Conformance with Specifications
5.1.1 The steel shall be killed steel made by one or more of
2.2 American National Standards Institute Standard:
the following processes: open-hearth, electric-furnace, or
B36.10 Welded and Seamless Wrought Steel Pipe
basic-oxygen.
5.1.2 The steel shall be made to fine grain practice.
5.1.3 Steel may be cast in ingots or may be strand cast.
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
Stainless Steel, and RelatedAlloys, and is the direct responsibility of Subcommittee When steel of different grades are sequentially strand cast,
A01.09 on Carbon Steel Tubular Products.
identification of the resultant transition material is required.
Current edition approved Oct. 10, 1996. Published November 1997. Originally
The producer shall remove the transition material by any
published as A 524 – 65. Last previous edition A 524 – 93.
established procedure that positively separates the grades.
For ASME Boiler and Pressure Vessel Code Applications see related Specifi-
cation SA-524 in Section II of that Code.
5.1.4 Pipe NPS 1 ⁄2 and under may be either hot finished or
Annual Book of ASTM Standards, Vol 01.01.
cold drawn.
Annual Book of ASTM Standards, Vol 14.02.
Available from American National Standards Institute, 11 West 42nd St., 13th
Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 524 – 96 (2001)
TABLE 1 Chemical Requirements
9.2.2 For pipe whose diameter exceeds 25 in. (635 mm) and
Element Grades I and II, Composition, % whose diameter to wall thickness ratio is 7.0 or less, bend test
specimens shall be bent at room temperature through 180°
Carbon, max 0.21
Manganese 0.90–1.35
without cracking on the outside of the bent portion. The inside
Phosphorus, max 0.035
diameter of the bend shall be 1 in. (25.4 mm).This test shall be
Sulfur, max 0.035
in place of Section 10.
Silicon 0.10–0.40
NOTE 3—Diameter to wall thickness ratio = specified outside diameter/
nominal wall thickness.
Example: For 28 in. diameter 5.000 in. thick pipe the diameter to wall
5.1.5 Unless otherwise specified, pipe NPS 2 and over shall
thickness ratio = 28/5 = 5.6.
be furnished hot finished. When agreed upon between the
manufacturer and purchaser, cold-drawn pipe may be fur- 10. Flattening Test Requirements
nished.
10.1 ForpipeoverNPS2,asectionofpipenotlessthan2 ⁄2
5.2 Heat Treatment:
in. (63.5 mm) in length shall be flattened cold between parallel
5.2.1 All hot-finished and cold-drawn pipe shall be reheated
plates until the opposite walls of the pipe meet. Flattening tests
to a temperature above 1550 °F (845°C) and followed by
shall be in accordance with SpecificationA 530, except that in
cooling in air or in the cooling chamber of a controlled
the equation used to calculate the H value, the following e
atmosphere furnace.
constants shall be used:
0.07 for Grade I
6. Chemical Composition
0.08 for Grade II
6.1 The steel shall conform to the chemical requirements
10.2 When low D-to-t ratio tubulars are tested, because the
prescribed in Table 1.
strain imposed due to geometry is unreasonably high on the
inside surface at the 6 and 12 o’clock locations, cracks at these
7. Heat Analysis
locations shall not be cause for rejection if the D-to-t ratio is
7.1 An analysis of each heat of steel shall be made by the
less than 10.
steel manufacturer to determine the percentages of the ele-
11. Hydrostatic Test Requirements
ments specified in Section 6. The chemical composition thus
determined, or that determined from a product analysis made 11.1 Each length of pipe shall be subjected to the hydro-
static pressure, except as provided in 11.2.
by the manufacturer, if the latter has not manufactured the
steel, shall be reported to the purchaser or the purchaser’s 11.2 When specified in the order, pipe may be furnished
without hydrostatic testing and each length so furnished shall
representative, and shall conform to the requirements specified
in Section 6. include with the mandatory marking the letters “NH.”
11.3 When certification is required by the purchaser and the
8. Product Analysis
hydrostatic test has been omitted, the certification shall clearly
state “Not Hydrostatically Tested,” and the specification num-
8.1 At the request of the purchaser, analyses of two pipes
ber and grade designation, as shown on the certification, shall
from each lot (Note 2) shall be made by the manufacturer from
be followed by the letters “NH.”
the finished pipe. The chemical composition thus determined
shall conform to the requirements specified in Section 6.
12. Dimensions and Weights
NOTE 2—Alot shall consist of 400 lengths, or fraction thereof, for each
12.1 The dimensions and weights of plain-end pipe are
size NPS 2 up to but not including NPS 6, and of 200 lengths, or fraction
included in ANSI B36.10. Sizes and wall thicknesses most
thereof, for each size NPS 6 and over.
generally available are listed in Appendix X1.
8.2 If the analysis of one of the tests specified in 8.1 does
13. Dimensions, Weight, and Permissible Variations
not conform to the requirements specified in 6, analyses shall
13.1 Weight—The weight of any length of pipe shall not
be made on additional pipe of double the original number from
vary more than 6.5 % over and 3.5 % under that specified for
the same lot, each of which shall conform to requirements
pipe of Schedule 120 and lighter nor more than 10 % over and
specified.
3.5 % under that specified for pipe heavier than Schedule 120.
9. Physical Properties Unless otherwise agreed upon between the manufacturer and
purchaser, pipe in sizes NPS 4 and smaller may be weighed in
9.1 Tensile Properties—The material shall conform to the
convenient lots; pipe in sizes larger than NPS 4 shall be
requirements as to tensile properties prescribed in Table 2.
weighed separately.
9.2 Bending Properties:
13.2 Diameter—Variations in outside diameter shall not
9.2.1 For pipe NPS 2 and under, a sufficient length of pipe
exceed those specified in Table 3.
shall stand being bent cold through 90° around a cylindrical
13.3 Thickness—The minimum wall thickness at any point
mandrel, the diameter of which is twelve times the nominal
shallnotbemorethan12.5 %underthenominalwallthickness
diameter of the pipe, without developing cracks.When ordered
specified.
for close coiling, the pipe shall stand being bent cold through
180° around a cylindrical mandrel, the diameter of which is
NOTE 4—The minimum wall thickness on inspection is shown in
eight times the nominal diameter of the pipe, without failure. Appendix X1.
A 524 – 96 (2001)
TABLE 2 Tensile Requirements
Wall Thicknesses
Grade I, 0.375 in. (9.52 mm) Grade II, greater than 0.375 in.
and under (9.52 mm)
Tensile strength, psi (MPa) 60 000–85 000 55 000–80 000
(414–586) (380–550)
Yield strength, min, psi (MPa) 35 000 (240) 30 000 (205)
Longitudinal Transverse Longitudinal Transverse
Elongation in 2 in. or 50 mm, min %:
Basic minimum elongation for walls ⁄16 in. (7.9 mm) and over in thickness, strip 30 16.5 35 25
tests, and for all small sizes tested in full section
When standard round 2 in. or 50 mm gage length test specimen is used for strip 22 12 28 20
A A
1 5
tests, a deduction for each ⁄32 in. (0.8 mm) decrease in wall thickness below ⁄16 1.50 1.00 . .
in. (7.9 mm) from the basic minimum elongation of the following percentage
A
The following table gives the computed minimum values:
Wall Thickness Elongation in 2 in. or 50 mm, min, %
Grade I
in. mm Longitudinal Transverse
⁄16(0.312) 7.94 30.0 16.5
⁄32 (0.281) 7.14 28.5 15.5
⁄4 (0.250) 6.35 27.0 14.5
⁄32 (0.219) 5.56 25.5 . . .
⁄16 (0.188) 4.76 24.0 . . .
⁄32 (0.156) 3.97 22.5 . . .
⁄8 (0.125) 3.18 21.0 . . .
⁄32 (0.094) 2.38 19.5 . . .
⁄16 (0.062) 1.59 18.0 . . .
Note—The above table gives the computed minimum elongation values for each ⁄32-in. (0.79 mm) decrease in wall thickness. Where the wall thickness lies between
two values shown above, the minimum elongation value is determined by the following equation:
Grade Direction of Test Equation
I transverse E = 32t + 6.50
I longitudinal E = 48t + 15.00
where:
E = elongation in 2 in. or 50 mm in % and
t = actual thickness of specimen, in. (mm).
TABLE 3 Variations in Outside Diameter
14.2.3 The section of pipe containing the defect may be cut
NPS Permissible Variations in Outside Diameter, in. (mm) off within the limits of requirements on length.
Designator
Over Under 14.2.4 Rejected.
1 1 1 1
14.3 To provide a workmanlike finish and basis for evalu-
⁄8to 1 ⁄2, incl ⁄64 (0.4) ⁄32 (0.8)
1 1 1
Over 1 ⁄2to 4, incl ⁄32(0.8) ⁄32 (0.8)
ating conformance with 14.2, the pipe manufacturer shall
1 1
Over 4 to 8, incl ⁄16 (1.6) ⁄32 (0.8)
remove by grinding the following noninjurious imperfections:
3 1
Over 8 to 18, incl ⁄32 (2.4) ⁄32 (0.8)
1 1
Over 18 ⁄8 (3.2) ⁄32 (0.8)
14.3.1 Mechanical marks, abrasions (Note 5) and pits, any
of which imperfections are deeper than ⁄16 in. (1.58 mm).
NOTE 5—Marksandabrasionsaredefinedascablemarks,dinges,guide
14. Workmanship, Finish, and Appearance
marks, roll marks, ball scratches, scores, die marks, and the like.
14.1 The pipe manufacturer shall explore a sufficient num-
14.3.2 Visual imperfections, commonly referred to as scabs,
ber of visual surface imperfections to provide reasonable
seams, laps, tears or slivers, found by exploration in accor-
assurance that they have been properly evaluated with respect
dance with 14.1 to be deeper than 5 % of the nominal wall
to depth. Exploration of all surface imperfections is not
thickness.
required but may be necessary to assure compliance with 14.2.
14.4 At the purchaser’s discretion, pipe shall be subject to
14.2 Surface imperfections that penetrate more than 12 ⁄2 %
rejection if surface imperfections acceptable under 14.2 are not
of the nominal wall thickness or encroach on the minimum
scattered, but appear over a large area in excess of what is
wall thickness shall be considered defects. Pipe with such
consideredaworkmanlikefinish.Dispositionofsuchpipeshall
defects shall be given one of the following dispositions:
be a matter of agreement between the manufacturer and the
14.2.1 The defect may be removed by grinding provided
purchaser.
that the remaining wall thickness is within specified limits.
14.2.2 Repaired in accordance with the repair welding 14.5 When imperfections or defects are removed by grind-
provisions of 14.6. ing, a smooth curved surface shall be maintained, and the wall
A 524 – 96 (2001)
thickness shall not be decreased below that permitted by this (25.4 by 12.7 mm) in section with the corners rounded to a
specification.Theoutsidediameteratthepointofgrindingmay radius not over ⁄16 in. (1.6 mm) and need not exceed 6 in. (152
be reduced by the amount so removed. mm)inlength.Thesideofthesamplesplacedintensionduring
14.5.1 Wall thickness measurements shall be made with a the bend shall be the side closest to the inner and outer surface
mechanical caliper or with a properly calibrated nondestruc- of the pipe respectively.
tive testing device of appropriate accuracy. In case of dispute,
17. Lengths
the measurement determined by use of the mechanical caliper
17.1 Pipe lengths shall be in accordance with the following
shall govern.
14.6 Weld repair shall be permitted only subject to the regular practice:
17.1.1 The lengths required shall be specified in the order,
approval of the purchaser and in accordance with Specification
A 530/A 530M. and
17.1.2 No jointers are permitted unless otherwise specified.
14.7 The finished pipe shall be reasonably straight.
17.2 If definite lengths are not required, pipe may be
15. Number of Tests and Retests
ordered in single random lengths of 16 to 22 ft (4.9 to 6.7 m),
15.1 One of either of the tests specified in 9.1 shall be made
with5 %12to16ft(3.7to4.9m)
...