ASTM A795-00

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 795 – 00
Standard Specification for
Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and
Seamless Steel Pipe for Fire Protection Use
This standard is issued under the fixed designation A 795; 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 1.4 The values stated in inch-pound units are to be regarded
as the standard. The SI equivalents may be approximate.
1.1 This specification covers black and hot-dipped galva-
nized welded and seamless steel pipe in sizes NPS 1/2 (Note 1)
2. Referenced Documents
to NPS 10 inclusive, with wall thicknesses as given in Table 1
2.1 ASTM Standards:
and Table 2. Pipe having other wall thicknesses may be
A90 TestMethodforWeight(Mass)ofCoatingonIronand
furnished provided such pipe complies with all other require-
Steel Articles with Zinc or Zinc-Alloy Coatings
ments of this specification and the outside diameter is as given
A 700 Practices for Packaging, Marking, and Loading
in Table 2. Pipe ordered under this specification is intended for
Methods for Steel Products for Domestic Shipment
use in fire protection systems. The pipe may be bent, but it is
A 751 Test Methods, Practices, and Terminology for
not intended for bending made at ambient temperature wherein
Chemical Analysis of Steel Products
the inside diameter of the bend is less than twelve times the
A 865 Specification for Threaded Couplings, Steel, Black
outside diameter of the pipe being bent (Note 2).
or Zinc-Coated (Galvanized) Welded or Seamless, for Use
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
in Steel Pipe Joints
been substituted in this standard for such traditional terms as “nominal 6
B6 Specification for Zinc
diameter,” “size,” and “nominal size.”
E 213 Practice for Ultrasonic Examination of Metal Pipe
NOTE 2—Successful bending of pipe is a function of equipment and
and Tubing
technique as well as pipe properties.
E 309 Practice for Eddy-Current Examination of Steel Tu-
1.2 This pipe is suitable for joining by the following
bular Products Using Magnetic Saturation
methods:
2.2 ASME Standards:
1.2.1 Light-Weight Fire Protection Pipe— Rolled groove,
B1.20.1 Pipe Threads, General Purpose, Inch
welding, and fittings for plain end pipe. See Table 1 for
B36.10 Welded and Seamless Wrought Steel Pipe
dimensions.
B36.19 Stainless Steel Pipe
1.2.2 Standard-Weight Fire Protection Pipe—Cut or rolled
2.3 Federal Standard:
groove, threading, welding, and fittings for plain end pipe. See
Fed. Std. No. 123 Marking for Shipments (CivilAgencies)
Table 2 for dimensions.
2.4 Military Standards:
1.2.3 For pipe having dimensions other than those of Table
MIL-STD-129 Marking for Shipment and Storage
1 and Table 2, the joining method must be compatible with the
MIL-STD-163 Steel Mill Products, Preparation for Ship-
pipe dimensions. A complete listing of standard light weight
ment and Storage
dimensions appears in ASME B36.10 and B36.19.
1.3 The following precautionary caveat pertains only to the
3. Terminology
test method portion, Sections 8, 9, and 10, of this specification:
3.1 Definitions of Terms Specific to This Standard:
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
Annual Book of ASTM Standards, Vol 01.06.
health practices and determine the applicability of regulatory
Annual Book of ASTM Standards, Vol 01.05.
limitations prior to use.
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 01.01.
Annual Book of ASTM Standards, Vol 02.04.
1 7
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Annual Book of ASTM Standards, Vol 03.03.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee Available from ASME International, Three Park Avenue, New York, NY
A01.09 on Steel Pipe. 10016–5990.
Current edition approved Sept. 10, 2000. Published November 2000. Originally AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
e1
published as A 795 – 82. Last previous edition A 795 – 97 . Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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.
A795–00
A
TABLE 1 Dimensions, Weights, and Test Pressure For Light-Weight Fire Protection Pipe—Schedule 10
Test Pressure
Outside Diameter Nominal Wall Thickness Weight Plain End
NPS Seamless and Electric-
Furnace-Welded
Designator Resistance-Welded
in. mm in. mm lb/ft kg/m psi MPa psi MPa
⁄4 1.050 (26.7) 0.083 (2.11) 0.86 (1.28) 500 (3.45) 700 (4.83)
1 1.315 (33.4) 0.109 (2.77) 1.41 (2.09) 500 (3.45) 700 (4.83)
1 ⁄4 1.660 (42.2) 0.109 (2.77) 1.81 (2.69) 500 (3.45) 1000 (6.89)
1 ⁄2 1.900 (48.3) 0.109 (2.77) 2.09 (3.11) 500 (3.45) 1000 (6.89)
2 2.375 (60.3) 0.109 (2.77) 2.64 (3.93) 500 (3.45) 1000 (6.89)
2 ⁄2 2.875 (73.0) 0.120 (3.05) 3.53 (5.26) 500 (3.45) 1000 (6.89)
3 3.500 (88.9) 0.120 (3.05) 4.34 (6.46) 500 (3.45) 1000 (6.89)
3 ⁄2 4.000 (101.6) 0.120 (3.05) 4.98 (7.41) 500 (3.45) 1200 (8.27)
4 4.500 (114.3) 0.120 (3.05) 5.62 (8.37) 500 (3.45) 1200 (8.27)
BB
5 5.563 (141.3) 0.134 (3.40) 7.78 (11.58) 1200 (8.27)
BB
6 6.625 (168.3) 0.134 (3.40) 9.30 (13.85) 1000 (6.89)
C BB
8 8.625 (219.1) 0.188 (4.78) 16.96 (25.26) 800 (5.51)
C BB
10 10.750 (273.1) 0.188 (4.78) 21.23 (31.62) 700 (4.83)
A
Schedule 10 corresponds to Schedule 10S as listed in ANSI B 36.19 for NPS ⁄4 through 6 only.
B
Furnace-welded pipe is not made in sizes larger than NPS 4.
C
Not Schedule 10.
TABLE 2 Dimensions, Weights, Test Pressures For Standard-Weight Fire Protection Pipe—Schedule 30 and Schedule 40
Test Pressure
Nominal Wall Weight Thread And
Outside Diameter Weight Plain End
A B
NPS Seamless and Electric-
Thickness Couplings
Furnace-Welded
Designator Resistance-Welded
in. mm in. mm lb/ft kg/m lb/ft kg/m psi MPa psi MPa
⁄2 0.840 (21.3) 0.109 (2.77) 0.85 (1.27) 0.85 (1.27) 700 (4.83) 700 (4.83)
⁄4 1.050 (26.7) 0.113 (2.87) 1.13 (1.69) 1.13 (1.68) 700 (4.83) 700 (4.83)
1 1.315 (33.4) 0.133 (3.38) 1.68 (2.50) 1.68 (2.50) 700 (4.83) 700 (4.83)
1 ⁄4 1.660 (42.2) 0.140 (3.56) 2.27 (3.39) 2.28 (3.40) 1000 (6.89) 1000 (6.89)
1 ⁄2 1.900 (48.3) 0.145 (3.68) 2.72 (4.05) 2.73 (4.07) 1000 (6.89) 1000 (6.89)
2 2.375 (60.3) 0.154 (3.91) 3.66 (5.45) 3.69 (5.50) 1000 (6.89) 1000 (6.89)
2 ⁄2 2.875 (73.0) 0.203 (5.16) 5.80 (8.64) 5.83 (8.68) 1000 (6.89) 1000 (6.89)
3 3.500 (88.9) 0.216 (5.49) 7.58 (11.29) 7.62 (11.35) 1000 (6.89) 1000 (6.89)
3 ⁄2 4.000 (101.6) 0.226 (5.74) 9.12 (13.58) 9.21 (13.71) 1200 (8.27) 1200 (8.27)
4 4.500 (114.3) 0.237 (6.02) 10.80 (16.09) 10.91 (16.25) 1200 (8.27) 1200 (8.27)
CC
5 5.563 (141.3) 0.258 (6.55) 14.63 (21.79) 14.82 (22.07) 1200 (8.27)
CC
6 6.625 (168.3) 0.280 (7.11) 18.99 (28.29) 19.20 (28.60) 1200 (8.27)
A CC
8 8.625 (219.1) 0.277 (7.04) 24.72 (36.82) 25.57 (38.09) 1200 (8.27)
A CC
10 10.750 (273.1) 0.307 (7.80) 34.27 (51.05) 35.78 (53.29) 1000 (6.89)
A
NPS ⁄2 through 6—Schedule 40; NPS 8 and 10—Schedule 30.
B
Based on 20-ft (6.1-m) lengths.
C
Furnace-welded pipe is not made in sizes larger than NPS 4.
3.1.1 imperfection—any discontinuity or irregularity found 5.1.4 Grade (seamless and electric-resistance-welded only),
in the pipe.
5.1.5 Size (NPS designator and weight class; standard
3.1.2 defect—an imperfection of sufficient size or magni-
weight or light weight; or outside diameter and nominal wall)
tude to be cause for rejection.
and wall thickness (Table 1 and Table 2),
5.1.6 Finish (black, galvanized, or other type of coating as
4. Classification
specified by the purchaser),
4.1 Pipe may be furnished in the following types (Note 3):
5.1.7 Length (specific or random),
4.1.1 Type F—Furnace-butt welded, continuous welded,
5.1.7.1 Grade for Type E and Type S,
4.1.2 Type E—Electric-resistance-welded, or
5.1.8 End finish,
4.1.3 Type S—Seamless.
5.1.8.1 Plain end, square cut,
NOTE 3—See Annex A1 for definitions of the types of pipe.
5.1.8.2 Plain end, beveled,
5.1.8.3 Cut groove (Note 4),
5. Ordering Information
5.1.8.4 Rolled groove (Note 4),
5.1 Orders for material under this specification should
5.1.8.5 Threads only,
include the following, as required, to describe the desired
5.1.8.6 Threaded and coupled, and
material adequately:
5.1.8.7 Couplings power tight.
5.1.1 Quantity (feet or number of lengths),
5.1.2 Name of material (steel pipe),
NOTE 4—Type of groove specified by the purchaser.
5.1.3 Type (seamless, electric-resistance-welded, or
furnace-welded), 5.1.9 ASTM designation.
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.
A795–00
6. Materials and Manufacture electric test in accordance with Practice E 213 or Practice
E 309. It is the intent of this test to reject pipe containing
6.1 The steel for both welded and seamless pipe shall be
defects.
made by one or more of the following processes: open-hearth,
9.2 The following information is for the benefit of the user
electric-furnace, or basic-oxygen.
of this specification:
6.2 Welded pipe NPS 4 and under may be furnace-welded
9.2.1 The ultrasonic examination referred to in this specifi-
or electric-resistance welded. Welded pipe over NPS 4 shall be
cation is intended to detect longitudinal discontinuities having
electric-resistance–welded.
a reflective area similar to or larger than the reference notch.
6.3 The weld seam of electric-resistance-welded pipe in
The examination may not detect circumferentially oriented
Grade B shall be heat treated after welding to a minimum of
imperfections or short, deep defects.
1000°F (540°C) so that no untempered martensite remains, or
9.2.2 The eddy-current examination referenced in this
otherwise processed in such a manner that no untempered
specification has the capability of detecting significant discon-
martensite remains.
tinuities, especially of the short, abrupt type.
9.2.3 The hydrostatic test referred to in Section 8 is a test
7. Chemical Composition
method provided for in many product specifications. This test
7.1 The steel shall conform to the requirements as to
hasthecapabilityoffindingdefectsofasizepermittingthetest
chemical composition specified in Table 3.
fluid to leak through the tube wall and may be either visually
7.2 An analysis of two pipes from each lot of 500 lengths,
seen or detected by a loss of pressure. This test may not detect
or fraction thereof, may be made by the purchaser. The
very tight, through-the-wall defects or defects that extend an
chemical composition thus determined shall conform to the
appreciable distance into the wall without complete penetra-
requirements specified in Table 3.
tion.
7.3 Methods, practices, and definitions for chemical anal-
9.2.4 Apurchaser interested in ascertaining the nature (type,
ysis shall be in accordance with Test Methods, Practices, and
size, location, and orientation) of discontinuities that can be
Terminology A 751.
detected in the specific application of these examinations
7.4 If the analysis of either pipe does not conform to the
should discuss this with the manufacturer of the tubular
requirements specified in Table 3, analyses shall be made on
product.
additional pipes of double the original number from the same
9.3 In order to accommodate the various types of nonde-
lot, each of which shall conform to the requirements specified
structive electric testing equipment and techniques in use, the
in Table 3.
calibrationtubeshallcontain,attheoptionoftheproducer,any
one or more of the following discontinuities to establish a
8. Hydrotest
minimum sensitivity level for rejection.
8.1 Each length of pipe shall be subjected to a hydrostatic
9.3.1 Drilled Hole—Drill a hole radially and completely
testbythemanufacturer.Theminimumtestpressureshallbeas
through the pipe wall, care being taken to avoid distortion of
prescribedinTable1andTable2.Thisdoesnotprohibittesting
the pipe while drilling. The diameter of the hole shall not be
at a higher pressure at the manufacturer’s option. The manu-
larger than 0.031 in. (0.79 mm) for pipe under 0.125 in. (3.18
facturer may apply the hydrostatic test to pipe with plain ends,
mm) in wall thickness, not larger than 0.0625 in. (1.59 mm) for
with threads only, or with threads and couplings. The hydro-
pipe between 0.125 in. (3.18 mm) and 0.200 in. (5.08 mm) in
static test may be applied to single or multiple lengths.
wall thickness, and not larger than 0.125 in. (3.18 mm) for pipe
8.2 The hydrostatic test shall be applied, without leakage
over 0.200 in. (5.08 mm) in wall thickness.
through the pipe wall, to each length of pipe.
9.3.2 Transverse Tangential Notch—Using a round tool or
file with a ⁄4-in. (6.4-mm) diameter, file or mill a notch
NOTE 5—The hydrostatic test pressures given herein are inspection test
tangential to the surface and transverse to the longitudinal axis
pressures. They are not intended as a basis for design and do not have any
direct relationship to working pressures. ofthepipe.Thenotchshallhaveadepthnotexceeding12 ⁄2 %
of the specified wall thickness of the pipe.
9. Nondestructive Electric Test
9.3.3 Longitudinal Notch—Machine a notch 0.031 in. (0.79
9.1 As an alternative to the hydrostatic test, and when
mm) or less in width in a radial plane parallel to the pipe axis
accepted by the purchaser, test each pipe with a nondestructive
on the outside surface of the pipe, to have a depth not
exceeding 12 ⁄2 % of the specified wall thickness of the pipe.
The length of the notch shall be compatible with the testing
TABLE 3 Chemical Requirements
method.
Composition, max, % 9.3.4 Compatibility—The discontinuity in the calibration
pipe shall be compatible with the testing equipment and
CMn P S
method being used.
Type E (electric-resistance-welded pipe) & Type S (seamless pipe)
9.4 Reject pipe producing a signal equal to or greater than
Open-hearth, electric-furnace or basic-oxygen:
the calibration discontinuity.
Grade A 0.25 0.95 0.035 0.035
Grade B 0.30 1.20 0.035 0.035
10. Flattening Test
Type F (furnace-welded pipe)
10.1 Perform the flattening test on pipe in accordance with
Open-hearth, electric-furnace, or basic oxygen 0.050 0.045
the following:
...