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SS pipe grades.

A249/ A249M A269 A270 A778 A335/ A335M A691
A790 A312 A409 A554 A358/ A358M A928/ A928M


CS pipe Grades

A 106 A53 API5L A671 A672

 

Designation: A 672 – 06

Standard Specification for
Electric-Fusion-Welded Steel Pipe for High-Pressure Service
at Moderate Temperatures

This standard is issued under the fixed designation A 672; 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*
1.1 This specification2 covers steel pipe: electric-fusionwelded
with filler metal added, fabricated from pressure-vessel
quality plate of any of several analyses and strength levels and
suitable for high-pressure service at moderate temperatures.
Heat treatment may or may not be required to attain the desired
properties or to comply with applicable code requirements.
Supplementary requirements are provided for use when additional
testing or examination is desired.
1.2 The specification nominally covers pipe 16 in. (405
mm) in outside diameter or larger with wall thicknesses up to
3 in. (75 mm), inclusive. Pipe having other dimensions may be
furnished provided it complies with all other requirements of
this specification.
1.3 Several grades and classes of pipe are provided.
1.3.1 Grade designates the type of plate used.
1.3.2 Class designates the type of heat treatment performed
during manufacture of the pipe, whether the weld is radiographically
examined, and whether the pipe has been pressure
tested as listed in 1.3.3.
1.3.3 Class designations are as follows (Note 1):

NOTE 1—Selection of materials should be made with attention to
temperature of service. For such guidance, SpecificationA 20/A 20M may
be consulted.
1.4 The values stated in inch-pound units are to be regarded
as the standard.
2. Referenced Documents
2.1 ASTM Standards: 3
A 20/A 20M Specification for General Requirements for
Steel Plates for Pressure Vessels
A 370 Test Methods and Definitions for Mechanical Testing
of Steel Products
A 435/A 435M Specification for Straight-Beam Ultrasonic
Examination of Steel Plates
A 530/A 530M Specification for General Requirements for
Specialized Carbon and Alloy Steel Pipe
A 577/A 577M Specification for Ultrasonic Angle-Beam
Examination of Steel Plates
A 578/A 578M Specification for Straight-Beam Ultrasonic
Examination of Plain and Clad Steel Plates for Special
Applications
E 109 Method for Dry Powder Magnetic Particle Inspection4
E 138 Method for Wet Magnetic Particle Inspection4
E 110 Test Method for Indentation Hardness of Metallic
Materials by Portable Hardness Testers
E 165 Test Method for Liquid Penetrant Examination
E 709 Guide for Magnetic Particle Examination
2.1.1 Plate Steel Specifications (Table 1)
A 202/A 202M Specification for Pressure Vessel Plates,
Alloy Steel, Chromium-Manganese-Silicon4
A 204/A 204M Specification for Pressure Vessel Plates,
Alloy Steel, Molybdenum
A 285/A 285M Specification for Pressure Vessel Plates,
1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.09 on Carbon Steel Tubular Products.
Current edition approved May 1, 2006. Published May 2006. Originally
approved in 1972. Last previous edition approved in 2005 as A 672 – 96 (2005).
2 For ASME Boiler and Pressure Vessel Code applications see related Specification
SA-672 in Section II of that Code.
3 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
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.

Carbon Steel, Low- and Intermediate-Tensile Strength
A 299/A 299M Specification for Pressure Vessel Plates,
Carbon Steel, Manganese-Silicon
A 302/A 302M Specification for Pressure Vessel Plates,
Alloy Steel, Manganese-Molybdenum and Manganese-
Molybdenum-Nickel
A 515/A 515M Specification for Pressure Vessel Plates,
Carbon Steel, for Intermediate- and Higher-Temperature
Service
A 516/A 516M Specification for Pressure Vessel Plates,
Carbon Steel, for Moderate- and Lower-Temperature Service
A 533/A 533M Specification for Pressure Vessel Plates,
Alloy Steel, Quenched and Tempered, Manganese-
Molybdenum and Manganese-Molybdenum-Nickel
A 537/A 537M Specification for Pressure Vessel Plates,
Heat-Treated, Carbon-Manganese-Silicon Steel
2.2 ASME Boiler and Pressure Vessel Code:5
Section II, Material Specifications
Section III, Nuclear Vessels
Section VIII, Unfired Pressure Vessels
Section IX, Welding Qualifications
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 A lot shall consist of 200 ft (61 m) or fraction thereof
of pipe from the same heat of steel.
3.1.2 The description of a lot may be further restricted by
use of Supplementary Requirement S14.
4. Ordering Information
4.1 The inquiry and order for material under this specification
should include the following information:
4.1.1 Quantity (feet, metres, or number of lengths),
4.1.2 Name of material (steel pipe, electric-fusionwelded),
4.1.3 Specification number,
4.1.4 Grade and class designations (see 1.3),
4.1.5 Size (inside or outside diameter, nominal or minimum
wall thickness),
4.1.6 Length (specific or random),
4.1.7 End finish (11.4),
4.1.8 Purchase options, if any (see 5.2.3, 11.3, 14.1 and
Sections 16, 20.1, 21, 22 of Specification A 530/A 530M), and
4.1.9 Supplementary requirements, if any, (refer to S1
through S14).
5. Materials and Manufacture
5.1 Materials—The steel plate material shall conform to the
requirements of the applicable plate specification for pipe
grade ordered as listed in Table 1.
5.2 Welding:
5.2.1 The joints shall be double-welded, full-penetration
welds made in accordance with procedures and by welders or
welding operators qualified in accordance with the ASME
Boiler and Pressure Vessel Code, Section IX.
5.2.2 The welds shall be made either manually or automatically
by an electric process involving the deposition of filler
metal.
5.2.3 The welded joint shall have positive reinforcement at
the center of each side of the weld, but not more than 1⁄8 in.
(3.2 mm). This reinforcement may be removed at the manufacturer’s
option or by agreement between the manufacturer
and purchaser. The contour of the reinforcement shall be
smooth, and the deposited metal shall be fused smoothly and
uniformly into the plate surface.
5.2.4 When radiographic examination in accordance with
9.1 is to be used, the weld reinforcement shall be governed by
the more restrictive provisions of UW–51 of Section VIII of
the ASME Boiler and Pressure Vessel Code instead of 5.2.3 of
this specification.

5.3 Heat Treatment—All classes other than 10, 11, 12 and
13 shall be heat treated in furnace controlled to 6 25 °F (14
°C) and equipped with a recording pyrometer so that heating
records are available. Heat treating after forming and welding
shall be to one of the following:
5.3.1 Classes 20, 21, 22, and 23 pipe shall be uniformly
heated within the post-weld heat-treatment temperature range
5 Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Three Park Ave., New York, NY 10016-5990.
TABLE 1 Plate Specification
Pipe Grade Type of Steel
ASTM Specification
No. Grade
A 45 plain carbon A 285/A 285M A
A 50 plain carbon A 285/A 285M B
A 55 plain carbon A 285/A 285M C
B 55 plain carbon, killed A 515/A 515M 55
B 60 plain carbon, killed A 515/A 515M 60
B 65 plain carbon, killed A 515/A 515M 65
B 70 plain carbon, killed A 515/A 515M 70
C 55 plain carbon, killed, fine grain A 516/A 516M 55
C 60 plain carbon, killed, fine grain A 516/A 516M 60
C 65 plain carbon, killed, fine grain A 516/A 516M 65
C 70 plain carbon, killed, fine grain A 516/A 516M 70
D 70 manganese-silicon—
normalized
A 537/A 537M 1
D80 manganese-silicon—Q&TA A 537/A 537M 2
H 75 manganese-molybdenum—
normalized
A 302/A 302M A
H 80 manganese-molybdenum—
normalized
A 302/A 302M B, C or D
J 80 manganese-molybdenum—
Q&TA
A 533/A 533M Cl-1B
J 90 manganese-molybdenum—
Q&TA
A 533/A 533M Cl-2B
J 100 manganese-molybdenum—
Q&TA
A 533/A 533M Cl-3B
K 75 chromium-manganese-silicon A 202/A 202M A
K 85 chromium-manganese-silicon A 202/A 202M B
L 65 molybdenum A 204/A 204M A
L 70 molybdenum A 204/A 204M B
L 75 molybdenum A 204/A 204M C
N 75 manganese-silicon A 299/A 299M . . .
A Q&T = quenched and tempered.
B Any grade may be furnished.
A 672 – 06
2
indicated in Table 2 for a minimum of 1 h/in. of thickness or 1
h, whichever is greater.
5.3.2 Classes 30, 31, 32, and 33 pipe shall be uniformly
heated to a temperature in the austenitizing range and not
exceeding the maximum normalizing temperature indicated in
Table 2 and subsequently cooled in air at room temperature.
5.3.3 Classes 40, 41, 42, and 43 pipe shall be normalized in
accordance with 5.3.2. After normalizing, the pipe shall be
reheated to the tempering temperature indicated in Table 2 as a
minimum and held at temperature for a minimum of 1⁄2 h/in. of
thickness or 1⁄2 h, whichever is greater, and air cooled.
5.3.4 Classes 50, 51, 52, and 53 pipe shall be uniformly
heated to a temperature in the austenitizing range, and not
exceeding the maximum quenching temperature indicated in
Table 2 and subsequently quenched in water or oil. After
quenching the pipe shall be reheated to the tempering temperature
indicated in Table 2 as a minimum and held at temperature
for a minimum of 1⁄2 h/in. of thickness or 1⁄2 h, whichever is
greater, and air cooled.
6. General Requirements
6.1 Material furnished to this specification shall conform to
the applicable requirements of the current edition of Specification
A 530/A 530M unless otherwise provided herein.
7. Chemical Composition
7.1 Product Analysis of Plate—The pipe manufacturer shall
make an analysis of each mill heat of plate material. The
product analysis so determined shall meet the requirements of
the plate specification to which the material was ordered.
7.2 Product Analysis of Weld—The pipe manufacturer shall
make an analysis of the finished deposited weld material from
each 500 ft (152 m) or fraction thereof. Analysis shall conform
to the welding procedure for deposited weld metal.
7.3 Analysis may be taken from the mechanical test specimens.
The results of the analyses shall be reported to the
purchaser.
7.4 If the analysis of one of the tests specified in 7.1 or 7.2
does not conform to the requirements specified, analyses shall
be made on additional pipes of double the original number
from the same lot, each of which shall conform to the
requirements specified. Nonconforming pipe shall be rejected.
8. Mechanical Properties
8.1 Tension Test:
8.1.1 Requirements—Transverse tensile properties of the
welded joint shall meet the minimum requirements for ultimate
tensile strength of the specified plate material. In addition for
Grades Dxx, Hxx, Jxx, and Nxx in Classes 3x, 4x, and 5x
transverse tensile properties of the base plate, shall be determined
on specimens cut from the heat-treated pipe. These
properties shall meet the mechanical test requirements of the
plate specification.
8.1.2 Number of Tests—One test specimen shall be made to
represent each lot of finished pipe.
8.1.3 Test Specimen Location and Orientation—The test
specimens shall be taken transverse to the weld at the end of
the finished pipe and may be flattened cold before final
machining to size.
8.1.4 Test Method—The test specimen shall be made in
accordance with QW-150 in Section IX of the ASME Boiler
and Pressure Vessel Code. The test specimen shall be tested at
room temperature in accordance with Test Methods and Definitions
A 370.
8.2 Transverse-Guided-Weld-Bend Tests:
8.2.1 Requirements—The bend test shall be acceptable if no
cracks or other defects exceeding 1⁄8 in. (3.2 mm) in any
direction are present in the weld metal or between the weld and
the base metal after bending. Cracks that originate along the
edges of the specimen during testing, and that are less than
1⁄4 in. (6.4 mm) measured in any direction shall not be
considered.
8.2.2 Number of Tests—One test (two specimens) shall be
made to represent each lot of finished pipe.
8.2.3 Test Specimen Location and Orientation—Two bend
test specimens shall be taken transverse to the weld at the end
of the finished pipe. As an alternative by agreement between
the purchaser and the manufacturer, the test specimens may be
taken from a test plate of the same material as the pipe, the test
plate being attached to the end of the cylinder and welded as a
prolongation of the pipe longitudinal seam.
8.2.4 Test Method—The test requirements of Test Methods
and Definitions A 370, paragraph A2.5.1.7 shall be met. For
wall thickness over 3⁄8 in. (9.5 mm) but less than 3⁄4 in. (19.0
mm) side-bend tests may be made instead of the face and
root-bend tests. For wall thicknesses 3⁄4 in. and over both
specimens shall be subjected to the side-bend test.
8.3 Pressure Test—Classes X2 and X3 pipe shall be tested
in accordance with Specification A 530/A 530M, Section 20.
9. Radiographic Examination
9.1 The full length of each weld of Classes X1 and X2 shall
be radiographically examined in accordance with and meet the
requirements of the ASME Boiler and Pressure Vessel Code,
Section VIII, paragraph UW–51.
9.2 Radiographic examination may be performed prior to
heat treatment.
10. Rework
10.1 Elimination of Surface Imperfections—Unacceptable
surface imperfections shall be removed by grinding or machining.
The remaining thickness of the section shall be no less than
the minimum specified in Section 11. The depression after
grinding or machining shall be blended uniformly into the
surrounding surface.
10.2 Repair of Base Metal Defects by Welding:
10.2.1 The manufacturer may repair, by welding, base metal
where defects have been removed, provided the depth of the
repair cavity as prepared for welding does not exceed 1⁄3 of the
nominal thickness and the requirements of 10.2.2-10.2.6 are
met. Base metal defects in excess of these may be repaired with
proper approval of the customer.

10.2.2 The defect shall be removed by suitable mechanical
or thermal cutting or gouging methods and the cavity prepared
for repair welding.
10.2.3 The welding procedure and welders or welding
operators are to be qualified in accordance with Section IX of
the ASME Boiler and Pressure Vessel Code.
10.2.4 The full length of the repaired pipe shall be heat
treated after repair in accordance with the requirements of the
pipe class specified.
10.2.5 Each repair weld of a defect where the cavity,
prepared for welding, has a depth exceeding the lesser of 3⁄8 in.
(9.5 mm) or 10 % of the nominal thickness shall be examined
by radiography in accordance with the methods and the
acceptance standards of Section 9.
10.2.6 The repair surface shall be blended uniformly into
the surrounding base metal surface and examined and accepted
in accordance with Section S6 or S8.
10.3 Repair of Weld Metal Defects by Welding:
10.3.1 The manufacturer may repair weld metal defects if he
meets the requirements of 10.2.3, 10.2.4, 10.3.2, 10.3.3, and
10.4.
10.3.2 The defects shall be removed by suitable mechanical
or thermal cutting or gouging methods and the repair cavity
examined and accepted in accordance with Sections S7 or S9.
10.3.3 The weld repair shall be blended uniformly into the
surrounding metal surfaces and examined and accepted in
accordance with 9.1 and Sections S7 or S9.
10.4 Retest—Each length of repaired pipe of a class requiring
a pressure test shall be hydrostatically tested following
repair.
11. Dimensions, Mass and Permissible Variations
11.1 The wall thickness and weight for welded pipe furnished
to this specification shall be governed by the requirements
of the specification to which the manufacturer ordered
the plate.
11.2 Permissible variations in dimensions at any point in a
length of pipe shall not exceed the following:
11.2.1 Outside Diameter—Based on circumferential measurement
6 0.5 % of the specified outside diameter.
11.2.2 Out-of-Roundness—Difference between major and
minor outside diameters, 1 %.
11.2.3 Alignment—Using a 10-ft (3-m) straightedge placed
so that both ends are in contact with the pipe, 1⁄8 in. (3.2 mm).
11.2.4 Thickness—The minimum wall thickness at any
point in the pipe shall not be more than 0.01 in. (0.3 mm) under
the specified nominal thickness.
11.3 Circumferential welded joints of the same quality as
the longitudinal joints shall be permitted by agreement between
the manufacturer and the purchaser.
11.4 Lengths with unmachined ends shall be within −0, +1⁄2
in. (−0, +13 mm) of that specified. Lengths with machined
ends shall be as agreed upon between the manufacturer and the
purchaser.

12. Workmanship, Finish, and Appearance
12.1 The finished pipe shall be free of injurious defects and
shall have a workmanlike finish. This requirement is to mean
the same as the identical requirement that appears in Specification
A 20/A 20M with respect to steel plate surface finish.
13. Product Marking
13.1 In addition to the marking provision of Specification
A 530/A 530M, class marking in accordance with 1.3.3 shall
follow the grade marking; for example, C 70–10.
13.2 Bar Coding—In addition to the requirements in 13.1,
bar coding is acceptable as a supplemental identification
method. The purchaser may specify in the order a specific bar
coding system to be used.

SUPPLEMENTARY REQUIREMENTS

One or more of the following supplementary requirements shall be applied only when specified by
the purchaser in the inquiry, contract, or order. Details of these supplementary requirements shall be
agreed upon in writing by the manufacturer and purchaser. Supplementary requirements shall in no
way negate any requirement of the specification itself.

S1. Tension and Bend Tests
S1.1 Tension tests in accordance with 8.1 and bend tests in
accordance with 8.2 shall be made on specimens representing
each length of pipe.
S2. Charpy V-Notch Test (For pipe with nominal wall
thickness of 1⁄2 in. and greater)
S2.1 Requirements—The acceptable test energies shall be as
shown in Table A1.15 of Specification A 20/A 20M for the
applicable plate specification unless otherwise stated in the
order.As an alternative, the test temperature may be 10 °F (−12
°C).
S2.2 Number of Specimens—Each test shall consist of at
least three specimens.
S2.2.1 One base-metal test shall be made from one pipe
length per heat, per heat-treat charge, and per nominal wall
thickness. For pipe from Classes 10, 11, 12, and 13, one base
metal test shall be made per heat per size and per wall
thickness.
S2.2.2 One weld-metal and one heat-affected zone (HAZ)
metal test shall be made in accordance with NB 4335 of
Section III of the ASME Boiler and Pressure Vessel Code.
S2.3 Test Specimen Location and Orientation:
S2.3.1 Base-metal specimens of stress-relieved, normalized,
and normalized and tempered pipe shall be taken in accordance
with the provisions for tension specimens in the body of this
specification.
S2.3.2 Base-metal specimens of quenched and tempered
pipe shall be taken in accordance with the provisions of NB
2225 of Section III of the ASME Boiler and Pressure Vessel
Code.
S3. Hardness Test
S3.1 Hardness measurements in accordance with Test Methods
and Definitions A 370 or Test Method E 110 shall be made
across the welded joint at both ends of each length of pipe. The
maximum acceptable hardness shall be as agreed upon between
the manufacturer and the purchaser.
S4. Product Analysis
S4.1 Product analyses in accordance with 7.1 shall be made
on each 500 ft (152 m) of pipe or fraction thereof or
alternatively, on each length of pipe as designated in the order.
S5. Metallography
S5.1 The manufacturer shall furnish one photomicrograph
to show the microstructure of 1003 magnification of the weld
metal or base metal of the pipe in the as-finished condition. The
purchaser shall state in the order: the material, base metal or
weld, and the number and locations of tests to be made. This
test is for information only.
S6. Magnetic Particle Examination of Base Metal
S6.1 All accessible surfaces of the pipe shall be examined in
accordance with Methods E 109 or E 138. Accessible is defined
as: All outside surfaces, all inside surfaces of pipe 24 in.
(610 mm) in diameter and greater, and inside surfaces of pipe
less than 24 in. in diameter for a distance of one pipe diameter
from the ends.
S6.2 Acceptance Standards—The following relevant indications
are unacceptable:
S6.2.1 Any linear indications greater than 1⁄16 in. (1.6 mm)
long for materials less than 5⁄8 in. (15.9 mm) thick; greater than
1⁄8 in. (3.2 mm) long for materials 5⁄8 in. thick to under 2 in.
(50.8 mm) thick; and greater than 3⁄16 in. (4.8 mm) long for
materials 2 in. thick or greater.
S6.2.2 Rounded indications with dimensions greater than 1⁄8
in. (3.2 mm) for thicknesses less than 5⁄8 in. (15.9 mm) and
greater than 3⁄16 in. (4.8 mm) for thicknesses 5⁄8 in. and greater.
S6.2.3 Four or more indications in any line separated by 1⁄16
in. (1.6 mm) or less edge-to-edge.
S6.2.4 Ten or more indications in any 6 in.2 (39 cm2) of
surface with the major dimension of this area not to exceed 6
in. (152 mm) when it is taken in the most unfavorable
orientation relative to the indications being evaluated.

S7. Magnetic Particle Examination of Weld Metal
S7.1 All accessible weld shall be examined in accordance
with Practice E 709. Accessible is defined as: All outside
surfaces, all inside surfaces of pipe less than 24 in. (610 mm)
in diameter for a distance of one pipe diameter from the ends.
S7.2 Acceptance Criteria—The following relevant indications
are unacceptable:
S7.2.1 Any cracks and linear indications.
S7.2.2 Rounded indications with dimensions greater than
3⁄16 in. (4.8 mm).
S7.2.3 Four or more indications in any line separated 1⁄16 in.
(1.6 mm) or less edge-to-edge.
S7.2.4 Ten or more indications in any 6 in.2 (39 cm2) of
surface with the major dimension of this area not to exceed 6
in. (152 mm) when it is taken in the most unfavorable
orientation relative to the indications being evaluated.
S8. Liquid Penetrant Examination of Base Metal
S8.1 All accessible surfaces of the pipe shall be examined in
accordance with Test Method E 165. Accessible is as defined in
S6.1.
S8.2 The acceptance criteria shall be in accordance with
S6.2.
S9. Liquid Penetrant Examination of Weld Metal
S9.1 All accessible surfaces of the pipe shall be examined in
accordance with Test Method E 165. Accessible is as defined in
S7.1
S9.2 The acceptance criteria shall be in accordance with
S7.2
S10. Straight Beam Ultrasonic Examination of Flat
Plate—UT 1
S10.1 The plate shall be examined and accepted in accordance
with Specification A 435/A 435M except that 100 % of
one surface shall be scanned by moving the search unit in
parallel paths with not less than 10 % overlap.
S11. Straight Beam Ultrasonic Examination of Flat
Plate—UT 2
S11.1 The plate shall be examined in accordance with
Specification A 578/A 578M except that 100 % of one surface
shall be scanned and the acceptance criteria shall be as follows:
S11.2 Any area, where one or more discontinuities produce
a continuous total loss of back reflection accompanied by
continuous indications on the same plane that cannot be
encompassed within a circle whose diameter is 3 in. (76.2 mm)
or 1⁄2 of the plate thickness, whichever is greater, is unacceptable.
In addition, two or more discontinuities on the same plane
and having the same characteristics but smaller than described
above shall be unacceptable unless separated by a minimum
distance equal to the largest diameter of the larger discontinuity
or unless they may be collectively encompassed by the circle
described above.
S12. Angle-Beam Ultrasonic Examination (Plate Less
than 2 in. (50.8 mm) Thick)—UT 3
S12.1 The plate shall be examined in accordance with
Specification A 577/A 577M except that the calibration notch
shall be V-shaped and the acceptance criteria shall be as
follows: Any area showing one or more reflectors producing
indications whose amplitude exceeds that of the calibration
notch is unacceptable.
S13. Repair Welding
S13.1 Repair of base metal defects by welding shall be done
only with customer approval.
S14. Description of Term
S14.1 lot—all pipe of the same mill heat of plate material
and wall thickness (within 61⁄4 in. (6.4 mm)) heat treated in
one furnace charge. For pipe that is not heat treated or that is
heat treated in a continuous furnace, a lot shall consist of each
200 ft (61 m) or fraction thereof of all pipe of the same mill
heat of plate material and wall thickness (within 61⁄4 in. (6.4
mm)), subjected to the same heat treatment. For pipe heat
treated in a batch-type furnace that is automatically controlled
within a 50 °F (28 °C) range and is equipped with recording
pyrometers so that heating records are available, a lot shall be
defined the same as for continuous furnaces.