Designation: A 106 – 99

An American National Standard

Used in USDOE-NE standards

Standard Speciﬁcation for

Seamless Carbon Steel Pipe for High-Temperature Service

This standard is issued under the ﬁxed designation A 106; 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.

This standard has been approved for use by agencies of the Department of Defense.

NOTE—Values in 14.5.1were editorially corrected August 1999.

1. Scope

1.1 This speciﬁcation

covers seamless carbon steel pipe for

high-temperature service (Note 1) in NPS

⁄

to NPS 48

inclusive, with nominal (average) wall thickness as given in

ANSI B 36.10. It shall be permissible to furnish pipe having

other dimensions provided such pipe complies with all other

requirements of this speciﬁcation. Pipe ordered under this

speciﬁcation shall be suitable for bending, ﬂanging, and similar

forming operations, and for welding. When the steel is to be

welded, it is presupposed that a welding procedure suitable to

the grade of steel and intended use or service will be utilized

(Note 2).

NOTE 1—It is suggested, consideration be given to possible graphitiza-

tion.

OTE 2—The purpose for which the pipe is to be used should be stated

in the order. Grade A rather than Grade B or Grade C is the preferred grade

for close coiling or cold bending. This note is not intended to prohibit the

cold bending of Grade B seamless pipe.

1.2 Supplementary requirements (S1 to S7) of an optional

nature are provided for seamless pipe intended for use in

applications where a superior grade of pipe is required. These

supplementary requirements call for additional tests to be made

and when desired shall be so stated in the order.

1.3 When these products are to be used in applications

conforming to ISO Recommendations for Boiler Construction,

the requirements of Speciﬁcation A 520 (Mechanical Property

Requirements Section) shall supplement and supersede the

requirements of this speciﬁcation.

1.4 The values stated in inch-pound units are to be regarded

as the standard.

NOTE 3—The dimensionless designator NPS (nominal pipe size) has

been substituted in this standard for such traditional terms as “nominal

diameter,” “size,” and “nominal size.”

1.5 The following precautionary caveat pertains only to the

test method portion, Sections 11, 12, 13, 14, and 15, of this

speciﬁcation: 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 appro-

priate safety and health practices and determine the applica-

bility of regulatory limitations prior to use.

2. Referenced Documents

2.1 ASTM Standards:

A 520 Speciﬁcation for Supplementary Requirements for

Seamless and Electric-Resistance-Welded Carbon Steel

Tubular Products for High-Temperature Service Conform-

ing to ISO Recommendations for Boiler Construction

A 530/A530M Speciﬁcation for General Requirements for

Specialized Carbon and Alloy Steel Pipe

E 213 Practice for Ultrasonic Examination of Metal Pipe

and Tubing

E 309 Practice for Eddy-Current Examination of Steel Tu-

bular Products Using Magnetic Saturation

E 381 Method of Macroetch Testing, Inspection, and Rating

Steel Products, Comprising Bars, Billets, Blooms, and

Forgings

E 570 Practice for Flux Leakage Examination of Ferromag-

netic Steel Tubular Products

2.2 ANSI Standard:

ANSI B 36.10 Welded and Seamless Wrought Steel Pipe

2.3 Military Standards:

MIL-STD-129 Marking for Shipment and Storage

MIL-STD-163 Steel Mill Products, Preparation for Ship-

ment and Storage

2.4 Federal Standard:

Fed. Std. No. 123 Marking for Shipments (Civil Agencies)

Fed. Std. No. 183 Continuous Identiﬁcation Marking of Iron

and Steel Products

2.5 Other Standards:

This speciﬁcation is under the jurisdiction of Committee A-1 on Steel, Stainless

Steel, and Related Alloys and is the direct responsibility of Subcommittee A01.09

on Carbon Steel Tubular Products.

Current edition approved Mar. 10, 1999. Published May 1999. Originally

published as A 106 – 26 T. Last previous edition A 106 – 97a.

For ASME Boiler and Pressure Vessel Code applications see related Speciﬁ-

cations SA-106 in Section II of that Code.

Annual Book of ASTM Standards, Vol 01.01.

Annual Book of ASTM Standards, Vol 03.03.

Annual Book of ASTM Standards, Vol 03.01.

Available from American National Standards Institute, 11 West 42nd St., 13th

Floor, New York, NY 10036.

Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700

Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.

Information Handling Services, 2000

SSPC-SP 6 Surface Preparation Speciﬁcation No. 6

3. Ordering Information

3.1 The inclusion of the following, as required will describe

the desired material adequately, when ordered under this

speciﬁcation:

3.1.1 Quantity (feet or number of lengths),

3.1.2 Name of material (seamless carbon steel pipe),

3.1.3 Grade (Table 1),

3.1.4 Manufacture (hot-ﬁnished or cold-drawn),

3.1.5 Size (NPS and weight class or schedule number, or

both; outside diameter and nominal wall thickness; or inside

diameter and nominal wall thickness),

3.1.6 Special outside diameter tolerance pipe (16.2.2),

3.1.7 Inside diameter tolerance pipe, over 10 in. (254 mm)

ID (16.2.3),

3.1.8 Length (speciﬁc or random, Section 20),

3.1.9 Optional requirements (Section 9 and S1 to S4),

3.1.10 Test report required (Section on Certiﬁcation of

Speciﬁcation A 530/A 530M),

3.1.11 Speciﬁcation designation,

3.1.12 End use of material,

3.1.13 Hydrostatic test in accordance with Speciﬁcation

A 530/A 530M or 13.3 of this speciﬁcation, or NDE in

accordance with Section 14 of this speciﬁcation.

3.1.14 Special requirements.

4. Process

4.1 The steel shall be killed steel, with the primary melting

process being open-hearth, basic-oxygen, or electric-furnace,

possibly combined with separate degassing or reﬁning. If

secondary melting, using electroslag remelting or vacuum-arc

remelting is subsequently employed, the heat shall be deﬁned

as all of the ingots remelted from a single primary heat.

4.2 Steel cast in ingots or strand cast is permissible. When

steels of different grades are sequentially strand cast, identiﬁ-

cation of the resultant transition material is required. The

producer shall remove the transition material by any estab-

lished procedure that positively separates the grades.

4.3 For pipe NPS 1

⁄

and under, it shall be permissible to

furnish hot ﬁnished or cold drawn.

4.4 Unless otherwise speciﬁed, pipe NPS 2 and over shall be

furnished hot ﬁnished. When agreed upon between the manu-

facturer and the purchaser, it is permissible to furnish cold-

drawn pipe.

5. Heat Treatment

5.1 Hot-ﬁnished pipe need not be heat treated. Cold-drawn

pipe shall be heat treated after the ﬁnal cold draw pass at a

temperature of 1200°F (650°C) or higher.

6. General Requirements

6.1 Material furnished to this speciﬁcation shall conform to

the applicable requirements of the current edition of Speciﬁ-

cation A 530/A 530M unless otherwise provided herein.

7. Chemical Composition

7.1 The steel shall conform to the requirements as to

chemical composition prescribed in Table 1.

8. Heat Analysis

8.1 An analysis of each heat of steel shall be made by the

steel manufacturer to determine the percentages of the ele-

ments speciﬁed in Section 7. If the secondary melting pro-

cesses of 5.1 are employed, the heat analysis shall be obtained

from one remelted ingot or the product of one remelted ingot

of each primary melt. The chemical composition thus deter-

mined, or that determined from a product analysis made by the

manufacturer, if the latter has not manufactured the steel, shall

be reported to the purchaser or the purchaser’s representative,

and shall conform to the requirements speciﬁed in Section 7.

9. Product Analysis

9.1 At the request of the purchaser, analyses of two pipes

from each lot (Note 4) of 400 lengths or fraction thereof, of

each size up to, but not including, NPS 6, and from each lot of

200 lengths or fraction thereof of each size NPS 6 and over,

shall be made by the manufacturer from the ﬁnished pipe. The

results of these analyses shall be reported to the purchaser or

the purchaser’s representative and shall conform to the require-

ments speciﬁed in Section 7.

9.2 If the analysis of one of the tests speciﬁed in 9.1 does

not conform to the requirements speciﬁed in Section 7,

analyses shall be made on additional pipes of double the

original number from the same lot, each of which shall

conform to requirements speciﬁed.

NOTE 4—A lot shall consist of the number of lengths speciﬁed in

Sections 9 and 21 of the same size and wall thickness from any one heat

of steel.

10. Tensile Requirements

10.1 The material shall conform to the requirements as to

tensile properties prescribed in Table 2. Computed elongation

values are contained in Table 3 and Table 4.

Available from Steel Structures Painting Council, 4400 5th Ave., Pittsburgh, PA

15213-2683.

TABLE 1 Chemical Requirements

Composition, %

Grade A Grade B Grade C

Carbon, max

0.25 0.30 0.35

Manganese 0.27–0.93 0.29–1.06 0.29–1.06

Phosphorus, max 0.035 0.035 0.035

Sulfur, max 0.035 0.035 0.035

Silicon, min 0.10 0.10 0.10

Chrome, max

0.40 0.40 0.40

Copper, max

0.40 0.40 0.40

Molybdenum, max

0.15 0.15 0.15

Nickel, max

0.40 0.40 0.40

Vanadium, max

0.08 0.08 0.08

For each reduction of 0.01 % below the speciﬁed carbon maximum, an

increase of 0.06 % manganese above the speciﬁed maximum will be permitted up

to a maximum of 1.35 %.

These ﬁve elements combined shall not exceed 1 %.

A 106

Information Handling Services, 2000

TABLE 4 Elongation Values

Area, in.

Tension Test Specimen Wall Thickness, in.

Elongation in 2 in. min., Speciﬁed Tensile Strength, psi

Grade A Grade B

Grade C

2 in. Specimen 3

4 in. Specimen 1 in. Specimen 1 1

2 in. Specimen 48 000 60 000 70 000

$ 0.75 $ 1.491 $ 0.994 $ 0.746 $ 0.497 36.0 29.5 25.5

0.74 1.470–1.490 0.980–0.993 0.735–0.745 0.490–0.496 36.0 29.5 25.5

0.73 1.451–1.469 0.967–0.979 0.726–0.734 0.484–0.489 36.0 29.5 25.5

0.72 1.430–1.450 0.954–0.966 0.715–0.725 0.477–0.483 36.0 29.5 25.5

0.71 1.411–1.429 0.941–0.953 0.706–0.714 0.471–0.476 35.5 29.0 25.5

0.70 1.390–1.410 0.927–0.940 0.695–0.705 0.464–0.470 35.5 29.0 25.5

0.69 1.371–1.389 0.914–0.926 0.686–0.694 0.457–0.463 35.5 29.0 25.5

0.68 1.350–1.370 0.900–0.913 0.675–0.685 0.450–0.456 35.5 29.0 25.0

0.67 1.331–1.349 0.887–0.899 0.666–0.674 0.444–0.449 35.5 29.0 25.0

0.66 1.310–1.330 0.874–0.886 0.655–0.665 0.437–0.443 35.0 29.0 25.0

0.65 1.291–1.309 0.861–0.873 0.646–0.654 0.431–0.436 35.0 28.5 25.0

0.64 1.270–1.290 0.847–0.860 0.635–0.645 0.424–0.430 35.0 28.5 25.0

0.63 1.251–1.269 0.834–0.846 0.626–0.634 0.417–0.423 35.0 28.5 25.0

0.62 1.230–1.250 0.820–0.833 0.615–0.625 0.410–0.416 35.0 28.5 25.0

TABLE 2 Tensile Requirements

Grade A

(Explanatory

Note 2)

Grade B Grade C

Tensile strength, min, psi (MPa)

Yield strength, min, psi (MPa)

48 000 (330)

30 000 (205)

60 000 (415)

35 000 (240)

70 000 (485)

40 000 (275)

Longitu-

dinal

Transverse Longitu-

dinal

Transverse Longitu-

dinal

Transverse

Elongation in 2 in. or 50 mm, min, %:

Basic minimum elongation transverse strip tests, and for all small

sizes tested in full section

35 25 30 16.5 30 16.5

When standard round 2-in. or 50-mm gage length test specimen is

used

28 20 22 12 20 12

For longitudinal strip tests

For transverse strip tests, a deduction for each 1

32 -in. (0.8-mm)

decrease in wall thickness below 5

16 in. (7.9 mm) from the

basic

minimum elongation of the following percentage shall be made

1.25

1.00

The minimum elogation in 2 in. (50.8 mm) shall be determined by the following equation:

5 625 000

0.2

0.9

where:

5 minimum elongation in 2 in. (50.8 mm), %, rounded to the nearest 0.5%

5 cross-sectional area of the tension test specimen, in.

, based on speciﬁed outside diameter or nominal specimen width and speciﬁed wall thickness rounded to

the nearest 0.01 in.

(if the area thus caluclated is greater than the value 0.75 in.

shall be used), and

5 speciﬁed tensile strength, psi.

See Table 4 for minimum elongation values for various size tension specimens and grades.

Table 3 gives the computed minimum values:

TABLE 3 Computed Transverse Elongation

Wall Thickness Elongation in 2 in. or 50 mm, min, %

in. mm Grade A, Transverse Grades B and C, Transverse

16 (0.312) 7.9 25.00 16.50

32 (0.281) 7.1 23.75 15.50

4 (0.250) 6.4 22.50 14.50

This table gives the computed minimum elongation values for each 1

32 -in. (0.8-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

B and C

Transverse

5 40

+ 12.50

5 32

+ 6.50

where:

5 elongation in 2 in. or 50 mm, %, and

5 actual thickness of specimen, in.

A 106

Information Handling Services, 2000

TABLE 4

Continued

Area, in.

Tension Test Specimen Wall Thickness, in.

Elongation in 2 in. min., Speciﬁed Tensile Strength, psi

Grade A Grade B

Grade C

2 in. Specimen 3

4 in. Specimen 1 in. Specimen 1 1

2 in. Specimen 48 000 60 000 70 000

0.61 1.211–1.229 0.807–0.819 0.606–0.614 0.404–0.409 34.5 28.5 24.5

0.60 1.190–1.210 0.794–0.806 0.595–0.605 0.397–0.403 34.5 28.5 24.5

0.59 1.171–1.189 0.781–0.793 0.586–0.594 0.391–0.396 34.5 28.0 24.5

0.58 1.150–1.170 0.767–0.780 0.575–0.585 0.384–0.390 34.5 28.0 24.5

0.57 1.131–1.149 0.754–0.766 0.566–0.574 0.377–0.383 34.0 28.0 24.5

0.56 1.110–1.130 0.740–0.753 0.555–0.565 0.370–0.376 34.0 28.0 24.5

0.55 1.091–1.109 0.727–0.739 0.546–0.554 0.364–0.369 34.0 28.0 24.9

0.54 1.070–1.090 0.714–0.726 0.535–0.545 0.357–0.363 34.0 27.5 24.0

0.53 1.051–1.069 0.701–0.713 0.526–0.534 0.351–0.356 33.5 27.5 24.0

0.52 1.030–1.050 0.687–0.700 0.515–0.525 0.344–0.350 33.5 27.5 24.0

0.51 1.011–1.029 0.674–0.686 0.506–0.514 0.337–0.343 33.5 27.5 24.0

0.50 0.990–1.010 0.660–0.673 0.495–0.505 0.330–0.336 33.5 27.0 23.5

0.49 0.971–0.989 0.647–0.659 0.486–0.494 0.324–0.329 33.0 27.0 23.5

0.48 0.950–0.970 0.634–0.646 0.475–0.485 0.317–0.323 33.0 27.0 23.5

0.47 0.931–0.949 0.621–0.633 0.466–0.474 0.311–0.316 33.0 27.0 23.5

0.46 0.910–0.930 0.607–0.620 0.455–0.465 0.304–0.310 33.0 27.0 23.5

0.45 0.891–0.909 0.594–0.606 0.446–0.454 0.297–0.303 32.5 26.5 23.0

0.44 0.870–0.890 0.580–0.593 0.435–0.445 0.290–0.296 32.5 26.5 23.0

0.43 0.851–0.869 0.567–0.579 0.426–0.434 0.284–0.289 32.5 26.5 23.0

0.42 0.830–0.850 0.554–0.566 0.415–0.425 0.277–0.283 32.0 26.5 23.0

0.41 0.811–0.829 0.541–0.553 0.406–0.414 0.271–0.276 32.0 26.0 23.0

0.40 0.790–0.810 0.527–0.540 0.395–0.405 0.264–0.270 32.0 26.0 22.5

0.39 0.771–0.789 0.514–0.526 0.386–0.394 0.257–0.263 31.5 26.0 22.5

0.38 0.750–0.770 0.500–0.513 0.375–0.385 0.250–0.256 31.5 26.0 22.5

0.37 0.731–0.749 0.487–0.499 0.366–0.374 0.244–0.249 31.5 25.5 22.5

0.36 0.710–0.730 0.474–0.486 0.355–0.365 0.237–0.243 31.0 25.5 22.0

0.35 0.691–0.709 0.461–0.473 0.346–0.354 0.231–0.236 31.0 25.5 22.0

0.34 0.670–0.690 0.447–0.460 0.335–0.345 0.224–0.230 31.0 25.0 22.0

0.33 0.651–0.669 0.434–0.446 0.326–0.334 0.217–0.223 30.5 25.0 22.0

0.32 0.630–0.650 0.420–0.433 0.315–0.325 0.210–0.216 30.5 25.0 21.5

0.31 0.611–0.629 0.407–0.419 0.306–0.314 0.204–0.209 30.5 25.0 21.5

0.30 0.590–0.610 0.394–0.406 0.295–0.305 0.197–0.203 30.0 24.5 21.5

0.29 0.571–0.589 0.381–0.393 0.286–0.294 0.191–0.196 30.0 24.5 21.5

0.28 0.550–0.570 0.367–0.380 0.275–0.285 0.184–0.190 29.5 24.5 21.0

0.27 0.531–0.549 0.354–0.366 0.266–0.274 0.177–0.183 29.5 24.0 21.0

0.26 0.510–0.530 0.340–0.353 0.255–0.265 0.170–0.176 29.0 24.0 21.0

0.25 0.491–0.509 0.327–0.339 0.246–0.254 0.164–0.169 29.0 23.5 20.5

0.24 0.470–0.490 0.314–0.326 0.235–0.245 0.157–0.163 29.0 23.5 20.5

0.23 0.451–0.469 0.301–0.313 0.226–0.234 0.151–0.156 28.5 23.5 20.5

0.22 0.430–0.450 0.287–0.300 0.215–0.225 0.144–0.150 28.5 23.0 20.0

0.21 0.411–0.429 0.274–0.286 0.206–0.214 0.137–0.143 28.0 23.0 20.0

0.20 0.390–0.410 0.260–0.273 0.195–0.205 0.130–0.136 27.5 22.5 19.5

0.19 0.371–0.389 0.247–0.259 0.186–0.194 0.124–0.129 27.5 22.5 19.5

0.18 0.350–0.370 0.234–0.246 0.175–0.185 0.117–0.123 27.0 22.0 19.5

0.17 0.331–0.349 0.221–0.233 0.166–0.174 0.111–0.116 27.0 22.0 19.0

0.16 0.310–0.330 0.207–0.220 0.155–0.165 0.104–0.110 26.5 21.5 19.0

0.15 0.291–0.309 0.194–0.206 0.146–0.154 0.097–0.103 26.0 21.5 18.5

0.14 0.270–0.290 0.180–0.193 0.135–0.145 0.091–0.096 26.0 21.0 18.5

0.13 0.251–0.269 0.167–0.179 0.126–0.134 0.084–0.090 25.5 21.0 18.0

0.12 0.230–0.250 0.154–0.166 0.115–0.125 0.077–0.083 25.0 20.5 18.0

0.11 0.211–0.229 0.141–0.153 0.106–0.114 0.071–0.076 24.5 20.0 17.5

0.10 0.190–0.210 0.127–0.140 0.095–0.105 0.064–0.070 24.0 19.5 17.0

0.09 0.171–0.189 0.114–0.126 0.086–0.094 0.057–0.063 23.5 19.5 17.0

0.08 0.150–0.170 0.100–0.113 0.075–0.085 0.050–0.056 23.0 19.0 16.5

0.07 0.131–0.149 0.087–0.099 0.066–0.074 0.044–0.049 22.5 18.5 16.0

0.06 0.110–0.130 0.074–0.086 0.055–0.065 0.037–0.043 22.0 18.0 15.5

0.05 0.091–0.109 0.061–0.073 0.046–0.054 0.031–0.036 21.0 17.0 15.0

0.04 0.070–0.090 0.047–0.060 0.035–0.045 0.024–0.030 20.0 16.5 14.5

0.03 0.051–0.069 0.034–0.046 0.026–0.034 0.017–0.023 19.0 15.5 13.5

0.02 0.030–0.050 0.020–0.033 0.015–0.025 0.010–0.016 17.5 14.5 12.5

#0.01 # 0.029 # 0.019 # 0.014 # 0.009 15.0 12.5 11.0

1 in.

5 645.16 mm

1 in. 5 25.4 mm.

11. Bending Requirements

11.1 For pipe NPS 2 and under a sufficient length of pipe

shall stand being bent cold through 90° around a cylindrical

mandrel, the diameter of which is twelve times the outside

diameter (as shown in ANSI B 36.10) of the pipe, without

developing cracks. When ordered for close coiling (Note 2),

A 106

Information Handling Services, 2000

the pipe shall stand being bent cold through 180° around a

cylindrical mandrel, the diameter of which is eight times the

outside diameter (as shown in ANSI B 36.10) of the pipe,

without failure.

11.2 Subject to the approval of the purchaser, for pipe

whose diameter exceeds 10 in. (254 mm), it shall be permis-

sible for the bend test to be substituted for the ﬂattening test

described in Section 12. The bend test specimens shall be bent

at room temperature through 180° with the inside diameter of

the bend being 1 in. (25.4 mm), without cracking on the outside

portion of the bent portion.

11.3 For pipe whose diameter exceeds 25 in. (635 mm) and

whose diameter to wall thickness ratio is 7.0 or less, the bend

test described in 11.2 shall be conducted instead of the

ﬂattening test.

NOTE 5—Diameter to wall thickness ratio 5 speciﬁed outside diameter/

nominal wall thickness.

Example: For 28 in. diameter 5.000 in. thick pipe the diameter to wall

thickness ratio 5 28/5 5 5.6.

12. Flattening Tests

12.1 Except as allowed by 11.2, for pipe over NPS 2, a

section of pipe not less than 2

⁄

in. (63.5 mm) in length shall

be ﬂattened cold between parallel plates until the opposite

walls of the pipe meet. Flattening tests shall be in accordance

with Speciﬁcation A 530/A 530M, except that in the formula

used to calculate the “H” value, the following “e” constants

shall be used:

0.08 for Grade A

0.07 for Grades B and C

12.2 When low D-to-t ratio tubulars are tested, because the

strain imposed due to geometry is unreasonably high on the

inside surface at the six and twelve o’clock locations, cracks at

these locations shall not be cause for rejection if the D-to-t ratio

is less than ten.

NOTE 6—The H values have been calculated for sizes from NPS 2

⁄

24, inclusive, and are shown in Table X1.1 of this speciﬁcation.

13. Hydrostatic Test

13.1 Each length of pipe shall withstand without leakage

through the pipe wall, a hydrostatic test, except as provided for

in 13.2, 13.3, and 13.4.

13.2 When speciﬁed by the purchaser, it shall be permis-

sible for pipe to be tested by the nondestructive electric test

described in Section 14 in lieu of the hydrostatic test.

13.3 When speciﬁed in the order, pipe shall be furnished

without hydrostatic test and without the NDE in Section 14. In

this case, each length so furnished shall include the mandatory

marking of the letters “NH.”

13.4 When the hydrostatic test and the NDE test are omitted

and the lengths marked with the letters “NH,” the certiﬁcation,

when required, shall clearly state “Not Hydro Statically

Tested,” the speciﬁcation number and material grade, as shown

on the certiﬁcation, shall be followed by the letters “NH.”

14. Nondestructive Electric Test

14.1 When allowed by 13.2, each pipe shall be tested with

a nondestructive electric test in accordance with Practice

E 213, Practice E 309, or Practice E 570. In such cases, the

marking of each length of pipe so furnished shall include the

letters “NDE.” It is the intent of this test to reject pipe with

imperfections that produce test signals equal or greater than

that of the calibration standard.

14.2 When the nondestructive electric test is performed, the

lengths shall be marked with the letters “NDE.” The certiﬁca-

tion, when required, shall state “Nondestructive Electric

Tested” and shall indicate which of the tests was applied. Also

the letters “NDE” shall be appended to the product speciﬁca-

tion number and material grade shown on the certiﬁcation.

14.3 The following information is for the beneﬁt of the user

of this speciﬁcation:

14.3.1 The reference standards deﬁned in 14.4 through 14.6

are convenient standards for calibration of nondestructive

testing equipment. The dimensions of such standards are not to

be construed as the minimum sizes of imperfections detectable

by such equipment.

14.3.2 The ultrasonic testing referred to in this speciﬁcation

is capable of detecting the presence and location of signiﬁcant

longitudinally or circumferentially oriented imperfections:

however, different techniques need to be employed for the

detection of such differently oriented imperfections. Ultrasonic

testing is not necessarily capable of detecting short, deep

imperfections.

14.3.3 The eddy current examination referenced in this

speciﬁcation has the capability of detecting signiﬁcant imper-

fections, especially of the short abrupt type.

14.3.4 The ﬂux leakage examination referred to in this

speciﬁcation is capable of detecting the presence and location

of signiﬁcant longitudinally or transversely oriented imperfec-

tions: however, different techniques need to be employed for

the detection of such differently oriented imperfections.

14.3.5 The hydrostatic test referred to in Section 13 has the

capability of ﬁnding defects of a size permitting the test ﬂuid

to leak through the tube wall and may be either visually seen

or detected by a loss of pressure. Hydrostatic testing is not

necessarily capable of detecting very tight, through-the-wall

imperfections or imperfections that extend an appreciable

distance into the wall without complete penetration.

14.3.6 A purchaser interested in ascertaining the nature

(type, size, location, and orientation) of discontinuities that can

be detected in the speciﬁc applications of these examinations is

directed to discuss this with the manufacturer of the tubular

product.

14.4 For ultrasonic testing, the calibration reference notches

shall be, at the option of the producer, any one of the three

common notch shapes shown in Practice E 213. The depth of

notch shall not exceed 12

⁄

% of the speciﬁed wall thickness of

the pipe or 0.004 in. (0.102 mm), whichever is greater.

14.5 For eddy current testing, the calibration pipe shall

contain, at the option of the producer, any one of the following

discontinuities to establish a minimum sensitivity level for

rejection:

14.5.1 Drilled Hole—The calibration pipe shall contain

depending upon the pipe diameter three holes spaced 120°

apart or four holes spaced 90° apart and sufficiently separated

longitudinally to ensure separately distinguishable responses.

The holes shall be drilled radially and completely through the

A 106

Information Handling Services, 2000

pipe wall, care being taken to avoid distortion of the pipe while

drilling. Depending upon the pipe diameter the calibration pipe

shall contain the following hole:

⁄

in. 0.039 in. (1 mm)

⁄

# 1

⁄

in. 0.055 in. (1.4 mm)

⁄

# 2 in. 0.071 in. (1.8 mm)

>2 # 5 in. 0.087 in. (2.2 mm)

>5 in. 0.106 in. (2.7 mm)

14.5.2 Transverse Tangential Notch—Using a round tool or

ﬁle with a

⁄

in. (6.4-mm) diameter, a notch shall be ﬁled or

milled tangential to the surface and transverse to the longitu-

dinal axis of the pipe. Said notch shall have a depth not

exceeding 12

⁄

% of the speciﬁed wall thickness of the pipe or

0.004 in. (0.102 mm), whichever is greater.

14.5.3 Longitudinal Notch—A notch 0.031 in. (0.787 mm)

or less in width shall be machined in a radial plane parallel to

the tube axis on the outside surface of the pipe, to have a depth

not exceeding 12

⁄

% of the speciﬁed wall thickness of the

tube or 0.004 in. (0.102 mm), whichever is greater. The length

of the notch shall be compatible with the testing method.

14.5.4 Compatibility—The discontinuity in the calibration

pipe shall be compatible with the testing equipment and the

method being used.

14.6 For ﬂux leakage testing, the longitudinal calibration

reference notches shall be straight-sided notches machined in a

radial plane parallel to the pipe axis. For wall thickness under

⁄

in. (12.7 mm), outside and inside notches shall be used; for

wall thickness equal and above

⁄

in. (12.7 mm), only an

outside notch shall be used. Notch depth shall not exceed

⁄

% of the speciﬁed wall thickness, or 0.004 in. (0.102

mm), whichever is greater. Notch length shall not exceed 1 in.

(25.4 mm), and the width shall not exceed the depth. Outside

diameter and inside diameter notches shall be located suffi-

ciently apart to allow separation and identiﬁcation of the

signals.

14.7 Pipe containing one or more imperfections that pro-

duce a signal equal to or greater than the signal produced by the

calibration standard shall be rejected or the area producing the

signal shall be reexamined.

14.7.1 Test signals produced by imperfections which cannot

be identiﬁed, or produced by cracks or crack-like imperfections

shall result in rejection of the pipe, unless it is repaired and

retested. To be accepted, the pipe must pass the same speciﬁ-

cation test to which it was originally subjected, provided that

the remaining wall thickness is not decreased below that

permitted by this speciﬁcation. The OD at the point of grinding

may be reduced by the amount so reduced.

14.7.2 Test signals produced by visual imperfections such as

those listed below may be evaluated in accordance with the

provisions of Section 18:

14.7.2.1 Dinges,

14.7.2.2 Straightener marks,

14.7.2.3 Cutting chips,

14.7.2.4 Scratches,

14.7.2.5 Steel die stamps,

14.7.2.6 Stop marks, or

14.7.2.7 Pipe reducer ripple.

14.8 The test methods described in this section are not

necessarily capable of inspecting the end portion of pipes, a

condition referred to as “end effect.” The length of such end

effect shall be determined by the manufacturer and, when

speciﬁed in the purchase order, reported to the purchaser.

15. Nipples

15.1 Nipples shall be cut from pipe of the same dimensions

and quality described in this speciﬁcation.

16. Dimensions, Weight, and Permissible Variations

16.1 Weight—The weight of any length of pipe shall not

vary more than 10 % over and 3.5 % under that speciﬁed.

Unless otherwise agreed upon between the manufacturer and

the purchaser, pipe in NPS 4 and smaller may be weighed in

convenient lots; pipe larger than NPS 4 shall be weighed

separately.

16.2 Diameter—The tolerances for diameter shall be in

accordance with the following:

16.2.1 Except for pipe ordered as special outside diameter

tolerance pipe or as inside diameter tolerance pipe, variations

in outside diameter shall not exceed those precribed in Table 5.

16.2.2 For pipe over 10 in. (254 mm) OD ordered as special

outside diameter tolerance pipe, the outside diameter shall not

vary more than 1 % over or 1 % under the speciﬁed outside

diameter.

16.2.3 For pipe over 10 in. (254 mm) ID ordered as inside

diameter tolerance pipe, the inside diameter shall not vary

more than 1 % over or 1 % under the speciﬁed inside diameter.

16.3 Thickness—The minimum wall thickness at any point

shall not be more than 12.5 % under the nominal wall thickness

speciﬁed.

NOTE 7—The minimum wall thicknesses on inspection of some of the

available sizes are shown in Table X2.1.

17. Lengths

17.1 Pipe lengths shall be in accordance with the following

regular practice:

17.1.1 The lengths required shall be speciﬁed in the order,

and

17.1.2 No jointers are permitted unless otherwise speciﬁed.

17.1.3 If deﬁnite lengths are not required, pipe may be

ordered in single random lengths of 16 to 22 ft (4.8 to 6.7 m)

with 5 % 12 to 16 ft (3.7 to 4.8 m), or in double random lengths

with a minimum average of 35 ft (10.7 m) and a minimum

length of 22 ft with 5 % 16 to 22 ft.

18. Workmanship, Finish and Appearance

18.1 The pipe manufacturer shall explore a sufficient num-

ber of visual surface imperfections to provide reasonable

TABLE 5 Variations in Outside Diameter

NPS Designator Permissible Variations in Outside

Diameter

Over Under

in. mm in. mm

8to1

⁄

, incl 1

64 (0.015) 0.40 1

64 (0.015) 0.40

Over 1

⁄

to 4, incl 1

32 (0.031) 0.79 1

32 (0.031) 0.79

Over 4 to 8, incl 1

16 (0.062) 1.59 1

32 (0.031) 0.79

Over 8 to 18, incl 3

32 (0.093) 2.38 1

32 (0.031) 0.79

Over 18 to 26, incl 1

8 (0.125) 3.18 1

32 (0.031) 0.79

Over 26 to 34, incl 5

32 (0.156) 3.97 1

32 (0.031) 0.79

Over 34 to 48, incl 3

16 (0.187) 4.76 1

32 (0.031) 0.79

A 106

Information Handling Services, 2000

assurance that they have been properly evaluated with respect

to depth. Exploration of all surface imperfections is not

required but consideration should be given to the necessity of

exploring all surface imperfections to assure compliance with

18.2.

18.2 Surface imperfections that penetrate more than 12

⁄

of the nominal wall thickness or encroach on the minimum

wall thickness shall be considered defects. Pipe with such

defects shall be given one of the following dispositions:

18.2.1 The defect shall be removed by grinding, provided

that the remaining wall thickness is within the limits speciﬁed

in 16.3.

18.2.2 Repaired in accordance with the repair welding

provisions of 18.6.

18.2.3 The section of pipe containing the defect may be cut

off within the limits of requirements on length.

18.2.4 Rejected.

18.3 To provide a workmanlike ﬁnish and basis for evalu-

ating conformance with 18.2 the pipe manufacturer shall

remove by grinding the following noninjurious imperfections:

18.3.1 Mechanical marks, abrasions (Note 8) and pits, any

of which imperfections are deeper than

⁄

in. (1.58 mm).

18.3.2 Visual imperfections commonly referred to as scabs,

seams, laps, tears, or slivers found by exploration in accor-

dance with 18.1 to be deeper than 5 % of the nominal wall

thickness.

18.4 At the purchaser’s discretion, pipe shall be subjected to

rejection if surface imperfections acceptable under 18.2 are not

scattered, but appear over a large area in excess of what is

considered a workmanlike ﬁnish. Disposition of such pipe shall

be a matter of agreement between the manufacturer and the

purchaser.

18.5 When imperfections or defects are removed by grind-

ing, a smooth curved surface shall be maintained, and the wall

thickness shall not be decreased below that permitted by this

speciﬁcation. The outside diameter at the point of grinding is

permitted to be reduced by the amount so removed.

18.5.1 Wall thickness measurements shall be made with a

mechanical caliper or with a properly calibrated nondestructive

testing device of appropriate accuracy. In case of dispute, the

measurement determined by use of the mechanical caliper shall

govern.

18.6 Weld repair shall be permitted only subject to the

approval of the purchaser and in accordance with Speciﬁcation

A 530/A 530M.

18.7 The ﬁnished pipe shall be reasonably straight.

NOTE 8—Marks and abrasions are deﬁned as cable marks, dinges, guide

marks, roll marks, ball scratches, scores, die marks, etc.

19. End Finish

19.1 The Pipe shall be furnished to the following practice,

unless otherwise speciﬁed.

19.1.1 NPS 1-1/2 and Smaller—All walls shall be either

plain-end square cut, or plain-end beveled at the option of the

manufacturer.

19.1.2 NPS 2 and Larger—Walls through extra strong

weights, shall be plain end-beveled.

19.1.3 NPS 2 and Larger—Walls over extra strong weights,

shall be plain-end square cut.

NOTE 9—Plain-end beveled is deﬁned as plain-end pipe having a bevel

angle of 30°, +5° or -0°, as measured from a line drawn perpendicular to

the axis of the pipe with a root face of

⁄

in. (1.5875 6 0.7938 mm).

Other bevel angles may be speciﬁed by agreement between the purchaser

and the manufacturer.

20. Number of Tests

20.1 The tensile requirements speciﬁed in Section 7 shall be

determined on one length of pipe from each lot (Note 4) of 400

lengths or fraction thereof of each size under NPS 6, and from

each lot of 200 lengths or fraction thereof of each size NPS 6

and over.

20.2 For pipe NPS 2 and under, the bend test speciﬁed in

11.1 shall be made on one pipe from each lot of 400 lengths or

fraction thereof of each size. The bend test, where used as

permitted by 11.2 or required by 11.3, shall be made on one end

of 5 % of the pipe from each lot. For small lots, at least one

pipe shall be tested.

20.3 The ﬂattening test speciﬁed in Section 12 shall be

made on one length of pipe from each lot of 400 lengths or

fraction thereof of each size over NPS 2, up to but not

including NPS 6, and from each lot of 200 lengths or fraction

thereof, of each size NPS 6 and over.

20.4 Each length of pipe shall be subjected to the hydro-

static test speciﬁed in Section 13.

20.5 If any test specimen shows defective machining or

develops ﬂaws, it is permissible to discard the ﬂawed specimen

and substitute another specimen.

21. Retests

21.1 If the percentage of elongation of any tension test

specimen is less than that prescribed in Table 1 and any part of

the fracture is more than

⁄

in. (19.0 mm) from the center of the

gage length of a 2-in. (50-mm) specimen as indicated by scribe

scratches marked on the specimen before testing, a retest shall

be allowed. If a specimen breaks in an inside or outside surface

ﬂaw, a retest shall be allowed.

21.2 Should a crop end of a ﬁnished pipe fail in the

ﬂattening test, one retest is permitted to be made from the

failed end. Pipe shall be normalized either before or after the

ﬁrst test, but pipe shall be subjected to only two normalizing

treatments.

22. Test Specimens and Test Methods

22.1 On NPS 8 and larger, specimens cut either longitudi-

nally or transversely shall be acceptable for the tension test. On

sizes smaller than NPS 8, the longitudinal test only shall be

used.

22.2 When round tension test specimens are used for pipe

wall thicknesses over 1.0 in. (25.40 mm), the mid–length of the

longitudinal axis of such test specimens shall be from a

location midway between the inside and outside surfaces of the

pipe.

22.3 Test specimens for the bend test speciﬁed in Section 11

and for the ﬂattening tests shall consist of sections cut from a

pipe. Specimens for ﬂattening tests shall be smooth on the ends

and free from burrs, except when made on crop ends.

22.4 Test specimens for the bend test speciﬁed in 11.2 and

11.3 shall be cut from one end of the pipe and, unless otherwise

A 106

Information Handling Services, 2000

speciﬁed, shall be taken in a transverse direction. One test

specimen shall be taken as close to the outer surface as possible

and another from as close to the inner surface as possible. The

specimens shall be either

⁄

in. (12.7 by 12.7 mm) in

section or 1 by

⁄

in. (25.4 by 12.7 mm) in section with the

corners rounded to a radius not over

⁄

in. (1.6 mm) and need

not exceed 6 in. (152 mm) in length. The side of the samples

placed in tension during the bend shall be the side closest to the

inner and outer surface of the pipe respectively.

22.5 All routine check tests shall be made at room tempera-

ture.

23. Certiﬁcation

23.1 When test reports are requested, in addition to the

requirements of Speciﬁcation A 530/A 530M, the producer or

supplier shall furnish to the purchaser a chemical analysis

report for the elements speciﬁed in Table 1.

24. Product Marking

24.1 In addition to the marking prescribed in Speciﬁcation

A 530/A 530M, the marking shall include heat number, the

information as per Table 6, an additional symbol“ S” if one or

more of the supplementary requirements apply; the length, OD

1 %, if ordered as special outside diameter tolerance pipe; ID

1 %, if ordered as special inside diameter tolerance pipe; the

schedule number, weight class, or nominal wall thickness; and,

for sizes larger than NPS 4, the weight. Length shall be marked

in feet and tenths of a foot, or metres to two decimal places,

depending on the units to which the material was ordered, or

other marking subject to agreement. For sizes NPS 1

⁄

,1,

and

⁄

, each length shall be marked as prescribed in Speciﬁ-

cation A 530/A 530M. These sizes shall be bundled in accor-

dance with standard mill practice and the total bundle footage

marked on the bundle tag; individual lengths of pipe need not

be marked with footage. For sizes less than NPS

⁄

, all the

required markings shall be on the bundle tag or on each length

of pipe and shall include the total footage; individual lengths of

pipe need not be marked with footage. If not marked on the

bundle tag, all required marking shall be on each length.

24.2 When pipe sections are cut into shorter lengths by a

subsequent processor for resale as material, the processor shall

transfer complete identifying information, including the name

or brand of the manufacturer to each unmarked cut length, or

to metal tags securely attached to bundles of unmarked small

diameter pipe. The same material designation shall be included

with the information transferred, and the processor’s name,

trademark, or brand shall be added.

24.3 Bar Coding—In addition to the requirements in 24.1

and 24.2, bar coding is acceptable as a supplementary identi-

ﬁcation method. The purchaser may specify in the order a

speciﬁc bar coding system to be used.

25. Government Procurement

25.1 When speciﬁed in the contract, material shall be

preserved, packaged, and packed in accordance with the

requirements of MIL-STD-163. The applicable levels shall be

as speciﬁed in the contract. Marking for the shipment of such

material shall be in accordance with Fed. Std. No. 123 for civil

agencies and MIL-STD-129 or Fed. Std. No. 183 if continuous

marking is required for military agencies.

25.2 Inspection—Unless otherwise speciﬁed in the contract,

the producer is responsible for the performance of all inspec-

tion and test requirements speciﬁed herein. Except as otherwise

speciﬁed in the contract, the producer shall use his own, or any

other suitable facilities for the performance of the inspection

and test requirements speciﬁed herein, unless disapproved by

the purchaser. The purchaser shall have the right to perform

any of the inspections and tests set forth in this speciﬁcation

where such inspections are deemed necessary to ensure that the

material conforms to the prescribed requirements.

26. Keywords

26.1 carbon steel pipe; seamless steel pipe; steel pipe

SUPPLEMENTARY REQUIREMENTS

One or more of the following supplementary requirements shall apply only when speciﬁed in the

purchase order. The purchaser may specify a different frequency of test or analysis than is provided

in the supplementary requirement. Subject to agreement between the purchaser and manufacturer,

retest and retreatment provisions of these supplementary requirements may also be modiﬁed.

S1. Product Analysis

S1.1 Product analysis shall be made on each length of pipe.

Individual lengths failing to conform to the chemical compo-

sition requirements shall be rejected.

S2. Transverse Tension Test

S2.1 A transverse tension test shall be made on a specimen

from one end or both ends of each pipe NPS 8 and over. If this

supplementary requirement is speciﬁed, the number of tests per

pipe shall also be speciﬁed. If a specimen from any length fails

to meet the required tensile properties (tensile, yield, and

elongation), that length shall be rejected subject to retreatment

in accordance with Speciﬁcation A 530/A 530M and satisfac-

tory retest.

TABLE 6 Marking

Hydro NDE Marking

Yes No Test Pressure

No Yes NDE

No No NH

Yes Yes Test Pressure/NDE

A 106

Information Handling Services, 2000

S3. Flattening Test

S3.1 The ﬂattening test of Speciﬁcation A 530/A 530M

shall be made on a specimen from one end or both ends of each

pipe. Crop ends may be used. If this supplementary require-

ment is speciﬁed, the number of tests per pipe shall also be

speciﬁed. If a specimen from any length fails because of lack

of ductility prior to satisfactory completion of the ﬁrst step of

the ﬂattening test requirement, that pipe shall be rejected

subject to retreatment in accordance with Speciﬁcation A 530/

A 530M and satisfactory retest. If a specimen from any length

of pipe fails because of a lack of soundness, that length shall be

rejected, unless subsequent retesting indicates that the remain-

ing length is sound.

S4. Metal Structure and Etching Test

S4.1 The steel shall be homogeneous as shown by etching

tests conducted in accordance with the appropriate sections of

Method E 381. Etching tests shall be made on a cross section

from one end or both ends of each pipe and shall show sound

and reasonably uniform material free from injurious lamina-

tions, cracks, and similar objectionable defects. If this supple-

mentary requirement is speciﬁed, the number of tests per pipe

required shall also be speciﬁed. If a specimen from any length

shows objectionable defects, the length shall be rejected,

subject to removal of the defective end and subsequent retests

indicating the remainder of the length to be sound and

reasonably uniform material.

S5. Carbon Equivalent

S5.1 The steel shall conform to a carbon equivalent (CE) of

0.50 maximum as determined by the following formula:

CE 5 %C 1

%Mn

%Cr 1 %Mo 1 %V

%Ni 1 %Cu

S5.2 A lower CE maximum may be agreed upon between

the purchaser and the producer.

S5.3 The CE shall be reported on the test report.

S6. Heat Treated Test Specimens

S6.1 At the request of the purchaser, one tensile test shall be

performed by the manufacturer on a test specimen from each

heat of steel furnished which has been either stress relieved at

1250°F or normalized at 1650°F, as speciﬁed by the purchaser.

Other stress relief or annealing temperatures, as appropriate to

the analysis, may be speciﬁed by agreement between the

purchaser and the manufacturer. The results of this test shall

meet the requirements of Table 1.

S7. Internal Cleanliness–Government Orders

S7.1 The internal surface of hot ﬁnished ferritic steel pipe

and tube shall be manufactured to a free of scale condition

equivalent to the visual standard listed in SSPC-SP6. Cleaning

shall be performed in accordance with a written procedure that

has been shown to be effective. This procedure shall be

available for audit.

APPENDIXES

(Nonmandatory Information)

X1. CALCULATED H VALUES FOR SEAMLESS PIPE

X1.1 Tables X1.1 and X1.2 list values for H to be used for

the test of Section 12.

A 106

Information Handling Services, 2000

TABLE X1.1 Calculated “H” Values for Seamless Pipe

Inch-Pound Units

NPS

Desig-

nator

Out-

side

Diam-

eter,

in.

Wall

Thick-

ness,

in.

Sched-

ule

Num-

ber

Distance, in inches,

Between Plates

9 by Equation:

1 1

NPS

Desig-

nator

Out-

side

Diam-

eter,

in.

Wall

Thick-

ness,

in.

Sched-

ule

Num-

ber

Distance, in inches,

Between Plates

9 by Equation:

1 1

Grade

Grades

B&C

Grade

Grades

B&C

⁄

2.875 0.203 40 1.456 1.545 14 14.000 0.250 10 2.759 3.045

0.276 80 1.694 1.779 0.312 20 3.294 3.617

0.375 160 1.925 2.002 0.375 30 3.792 4.146

0.438 40 4.669 5.125

3 3.500 0.216 40 1.646 1.755 0.593 60 5.234 5.647

0.300 80 1.955 2.062 0.750 80 6.064 6.494

0.438 160 2.306 2.398 0.937 100 6.887 7.322

1.093 120 7.479 7.902

⁄

4.000 0.226 40 1.788 1.912 1.250 140 7.974 8.397

0.318 80 2.153 2.276 1.406 160 8.416 8.827

4 4.500 0.237 40 1.929 2.067 16 16.000 0.250 10 2.284 3.124

0.337 80 2.350 2.489 0.312 20 3.387 3.730

0.438 120 2.687 2.818 0.375 30 3.915 4.294

0.531 160 2.896 3.022 0.500 40 4.854 5.284

0.656 60 5.855 6.324

5 5.563 0.258 40 2.205 2.372 0.843 80 6.861 7.352

0.375 80 2.747 2.920 1.031 100 7.709 8.206

0.500 120 3.179 3.346 1.218 120 8.426 8.919

0.625 160 3.509 3.667 1.438 140 9.141 9.625

1.593 160 9.579 10.050

6 6.625 0.280 40 2.473 2.669

0.432 80 3.213 3.419 18 18.000 0.250 10 2.876 3.189

0.562 120 3.682 3.884 0.312 20 3.462 3.823

0.719 160 4.116 4.307 0.438 30 4.535 4.963

0.562 40 5.457 5.941

8 8.625 0.250 20 2.477 2.702 0.750 60 6.656 7.185

0.277 30 2.668 2.902 0.937 80 7.663 8.214

0.322 40 2.964 3.210 1.156 100 8.657 9.216

0.406 60 3.451 3.711 1.375 120 9.495 10.043

0.500 80 3.914 4.181 1.562 140 10.115 10.660

0.593 100 4.305 4.573 1.781 160 10.665 11.198

0.719 120 4.750 5.013

0.812 140 5.036 5.293 20 20.000 0.250 10 2.919 3.242

0.906 160 5.288 5.538 0.375 20 4.101 4.521

0.500 30 5.143 5.632

10 10.750 0.250 20 2.615 2.868 0.593 40 5.841 6.367

0.307 30 3.054 3.333 0.812 60 7.272 7.856

0.365 40 3.459 3.757 1.031 80 8.464 9.072

0.500 60 4.268 4.592 1.281 100 9.601 10.221

0.593 80 4.738 5.070 1.500 120 10.452 11.069

0.719 100 5.320 5.621 1.750 140 11.284 11.889

0.843 120 5.747 6.077 1.968 160 11.913 12.504

1.000 140 6.242 6.564

1.125 160 6.580 6.892 24 24.000 0.250 10 2.986 3.326

0.375 20 4.236 4.686

12 12.750 0.250 20 2.711 2.985 0.562 30 5.869 6.437

0.330 30 3.366 3.683 0.687 40 6.831 7.454

0.406 40 3.921 4.266 0.968 60 8.690 9.390

0.562 60 4.892 5.271 1.218 80 10.061 10.793

0.687 80 5.542 5.934 1.531 100 11.449 12.244

0.843 100 6.231 6.627 1.812 120 12.585 13.32

1.000 120 6.817 7.209 2.062 140 13.424 14.150

1.125 140 7.222 7.607 2.343 160 14.248 14.958

1.312 160 7.747 8.119

A 106

Information Handling Services, 2000

TABLE X1.2 Calculated “H” Values for Seamless Pipe Continued

SI Units

NPS

Desig-

nator

Out-

side

Diam-

eter,

Wall

Thick-

ness,

Sched-

ule

Num-

ber

Distance, in mm,

Between Plates

9 by Equation:

1 1

NPS

Desig-

nator

Out-

side

Diam-

eter,

Wall

Thick-

ness,

Sched-

ule

Num-

ber

Distance, in mm,

Between Plates

9 by Equation:

1 1

Grade

Grades

B&C

Grade

Grades

B&C

⁄

73.0 5.16 40 37.0 39.2 14 355.6 6.35 10 70.1 77.3

7.01 80 43.0 45.2 7.92 20 83.7 91.8

9.52 160 48.9 50.8 9.52 30 96.3 105.3

11.13 40 118.6 130.2

3 88.9 5.49 40 41.8 44.6 15.06 60 132.9 143.4

7.62 80 49.6 52.4 19.05 80 154.0 165.0

11.13 160 58.6 60.9 23.80 100 174.9 186.0

27.76 120 190.0 200.7

⁄

101.6 5.74 40 45.4 48.6 31.75 140 202.5 213.3

8.08 80 54.7 57.8 35.71 160 213.8 224.2

4 114.3 6.02 40 49.0 52.5 16 406.4 6.35 10 71.7 79.4

8.56 80 59.7 63.2 7.92 20 89.0 94.7

11.13 120 67.0 71.6 9.52 30 99.4 109.1

13.49 160 73.6 76.8 12.70 40 123.3 143.2

16.66 60 148.7 160.6

5 141.3 6.55 40 56.0 60.2 21.41 80 174.3 186.7

9.52 80 69.8 74.2 26.19 100 195.8 208.4

12.70 120 80.8 85.0 30.94 120 214.0 226.6

15.88 160 89.1 93.1 36.53 140 232.2 244.5

40.46 160 243.3 255.3

6 168.3 7.11 40 62.8 67.8

10.97 80 81.6 86.8 18 457.2 6.35 10 73.0 81.0

14.27 120 93.5 98.6 7.92 20 87.9 97.1

18.24 160 104.6 109.4 11.13 30 115.2 126.1

14.27 40 139.5 150.9

8 219.1 6.35 20 63.0 68.6 19.05 60 169.1 182.5

7.04 30 67.8 73.7 23.80 80 194.6 208.6

8.18 40 75.3 81.5 29.36 100 219.9 234.1

10.31 60 87.7 94.3 34.92 120 241.2 255.1

12.70 80 99.4 106.2 39.67 140 256.9 270.7

15.06 100 109.4 116.2 45.24 160 270.9 284.4

18.24 120 120.6 127.3

20.62 140 127.9 134.4 20 508.0 6.35 10 74.1 82.4

23.01 160 134.3 140.7 9.52 20 104.2 114.8

12.70 30 130.6 143.0

10 273.0 6.35 20 66.4 72.8 15.06 40 148.4 161.7

7.80 30 77.6 84.7 20.62 60 184.7 199.5

9.27 40 87.9 95.4 26.19 80 215.0 230.4

12.70 60 108.4 116.6 32.54 100 243.9 259.6

15.06 80 120.4 128.8 38.10 120 265.5 281.2

18.24 100 135.1 142.8 44.45 140 286.6 302.0

21.41 120 146.0 154.4 49.99 160 302.6 317.6

25.40 140 158.6 166.7

28.58 160 167.1 175.1 24 609.6 6.35 10 75.8 84.5

9.52 20 107.6 119.0

12 323.8 6.35 20 68.9 75.8 14.27 30 149.1 163.5

8.38 30 85.5 93.6 17.35 40 173.5 189.3

10.31 40 99.6 108.4 24.59 60 220.7 238.5

14.27 60 124.3 133.9 30.94 80 255.6 274.1

17.35 80 140.8 150.7 38.89 100 290.8 311.0

21.41 100 158.3 168.3 46.02 120 319.7 338.6

25.40 120 173.2 183.1 52.37 140 341.0 359.4

28.58 140 183.4 193.2 59.51 160 361.9 379.9

33.32 160 196.8 206.2

A 106

Information Handling Services, 2000

X2. MINIMUM WALL THICKNESS

X2.1 Table X2.1 lists minimum wall thicknesses for nomi- nal pipe wall thickness.

The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection

with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such

patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible

technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your

views known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428.

TABLE X2.1 Mimimum Wall Thicknesses on Inspection for Nominal (Average) Pipe Wall Thicknesses

NOTE 1—The following equation, upon which this table is based, may be applied to calculate minimum wall thickness from nominal (average) wall

thickness:

3 0.875 5 t

where:

5 nominal (average) wall thickness, in. and

5 minimum wall thickness, in.

The wall thickness is expressed to three decimal places, the fourth decimal place being carried forward or dropped, in accordance with Practice E 29.

OTE 2—This table covers some wall thicknesses associated with standard pipe sizes but is not meant to imply that these are the only thicknesses

obtainable under this speciﬁcation.

Nominal

(Average)

Thickness

(

)

Minimum

Thickness

on Inspec-

tion (

)

Nominal

(Average)

Thickness

)

Minimum

Thickness

on Inspec-

tion (

)

Nominal

(Average)

Thickness

(

)

Minimum

Thickness

on Inspec-

tion (

)

in. mm in. mm in. mm in. mm in. mm in. mm

0.068 1.73 0.060 1.52 0.281 7.14 0.246 6.25 0.864 21.94 0.756 19.20

0.083 2.11 0.073 1.85 0.294 7.47 0.257 6.53 0.875 22.22 0.766 19.46

0.088 2.24 0.077 1.96 0.300 7.62 0.262 6.65 0.906 23.01 0.793 20.14

0.091 2.31 0.080 2.03 0.307 7.80 0.269 6.83 0.938 23.82 0.821 20.85

0.095 2.41 0.083 2.11 0.308 7.82 0.270 6.86 0.968 24.59 0.847 21.51

0.109 2.77 0.095 2.41 0.312 7.92 0.273 6.93 1.000 25.40 0.875 22.22

0.113 2.87 0.099 2.51 0.318 8.07 0.278 7.06 1.031 26.19 0.902 22.91

0.119 3.02 0.104 2.64 0.322 8.18 0.282 7.16 1.062 26.97 0.929 23.60

0.125 3.18 0.109 2.77 0.330 8.38 0.289 7.34 1.094 27.79 0.957 24.31

0.126 3.20 0.110 2.79 0.337 8.56 0.295 7.49 1.125 28.58 0.984 24.99

0.133 3.38 0.116 2.95 0.344 8.74 0.301 7.64 1.156 29.36 1.012 25.70

0.140 3.56 0.122 3.10 0.358 9.09 0.313 7.95 1.219 30.96 1.066 27.08

0.141 3.58 0.123 3.12 0.365 9.27 0.319 8.10 1.250 31.75 1.094 27.79

0.145 3.68 0.127 3.23 0.375 9.52 0.328 8.33 1.281 32.54 1.121 28.47

0.147 3.73 0.129 3.28 0.382 9.70 0.334 8.48 1.312 33.32 1.148 29.16

0.154 3.91 0.135 3.43 0.400 10.16 0.350 8.89 1.375 34.92 1.203 30.56

0.156 3.96 0.136 3.45 0.406 10.31 0.355 9.02 1.406 35.71 1.230 31.24

0.172 4.37 0.150 3.81 0.432 10.97 0.378 9.60 1.438 36.53 1.258 31.95

0.179 4.55 0.157 3.99 0.436 11.07 0.382 9.70 1.500 38.10 1.312 33.32

0.188 4.78 0.164 4.17 0.438 11.12 0.383 9.73 1.531 38.89 1.340 34.04

0.191 4.85 0.167 4.24 0.469 11.91 0.410 10.41 1.562 39.67 1.367 34.72

0.200 5.08 0.175 4.44 0.500 12.70 0.438 11.13 1.594 40.49 1.395 35.43

0.203 5.16 0.178 4.52 0.531 13.49 0.465 11.81 1.635 41.53 1.431 36.35

0.210 5.33 0.184 4.67 0.552 14.02 0.483 12.27 1.750 44.45 1.531 38.89

0.216 5.49 0.189 4.80 0.562 14.27 0.492 12.50 1.781 45.24 1.558 39.57

0.218 5.54 0.191 4.85 0.594 15.09 0.520 13.21 1.812 46.02 1.586 40.28

0.219 5.56 0.192 4.88 0.600 15.24 0.525 13.34 1.875 47.62 1.641 41.68

0.226 5.74 0.198 5.03 0.625 15.88 0.547 13.89 1.969 50.01 1.723 43.76

0.237 6.02 0.207 5.26 0.656 16.66 0.574 14.58 2.000 50.80 1.750 44.45

0.250 6.35 0.219 5.56 0.674 17.12 0.590 14.99 2.062 52.37 1.804 45.82

0.258 6.55 0.226 5.74 0.688 17.48 0.602 15.29 2.125 53.98 1.859 47.22

0.276 7.01 0.242 6.15 0.719 18.26 0.629 15.98 2.200 55.88 1.925 48.90

0.277 7.04 0.242 6.15 0.750 19.05 0.656 16.66 2.344 59.54 2.051 52.10

0.279 7.09 0.244 6.19 0.812 20.62 0.710 18.03 2.500 63.50 2.188 55.58

0.280 7.11 0.245 6.22 0.844 21.44 0.739 18.77

A 106

Information Handling Services, 2000

This standard is copyrighted by ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. Individual

reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585

(phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (http://www.astm.org).

A 106

Information Handling Services, 2000