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COPYRIGHT American Society of Mechanical Engineers
Licensed by Information Handling Services
The American Society
of
Mechanical
Enlineen
A N M E R I C A N A T I O N A L T A N D A R D
A
N
S
WELDED AND SEAMLESS
WROUGHT
STEEL
PIPE
ASME B36.1OM-2000
COPYRIGHT American Society of Mechanical Engineers
Licensed by Information Handling Services
Date
of
Issuance: March
15, 2001
This Standard will be revised when the Society approves the
issuance
of
a
new edition. There will
be
no
addenda or written interpretations
of
the
requirements of this Standard issued
to
this edition.
ASME is the registered trademark
of
the American Society of Mechanical Engineers.
This code or standard was developed under procedures accredited meeting thecriteria for
as
American National Standards. The Consensus Committee that approved the code or standard
was balanced to assure that individuals from competent andconcerned interests have had an
opportunity to
participate. The proposed code or standard was made available for public review
and comment that provides an opportunity for additional public input from
industry, academia,
regulatory agencies, and the public-at-large.
ASME does not "approve," "rate,"
or "endorse" any item, construction, proprietary device,
or activity.
ASME does not take any position with respect to the validity of any patent rights
asserted in
connection with any items mentioned this document, and does not undertake to insure anyone
in
utilizing a standard againstliability for infringement of any
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of
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accordance
with
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of interpretations by individuals.
No
part
of
this document may bereproduced in any form,
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without the prior written permission
of
the publisher.
The Am.erican Society
of
Mechanical Engineers
Three Park Avenue, New York, NY
10016-5990
Copyright
O
2001
by
THE AMERICAN SOCIETY
OF
MECHANICAL ENGINEERS
All Rights Reserved
Printed
in
U.S.A.
COPYRIGHT American Society of Mechanical Engineers
Licensed by Information Handling Services
S T D - A S M E
B 3 b - L O M - E N G L
2000
m
0757b70
Ob21734
785
M
Standards Association authorized the organization of a
Sectional Committee on Standardization of Dimensions and Material of Wrought Steel and
Wrought Iron Pipe and Tubing for the purpose of unifying the standards of these commodities
in
force
in
this country. The American Society for Testing and Materials and The American
Society of Mechanical Engineers were designated as sponsors, and the first meeting of the
Sectional Committee washeld
in
Pittsburgh, Pennsylvania, onMay
18,
1928.
The dimensions of commercial
pipe
in
general
use
in
the
United States at the
time
conformed rather generallytothoserecommended
by the
ASME
Committee onStandard
PipeandPipe Threads published
in
1886
(ASME Transactions, Vol.VIII,p.
29).
On these
standards an enormous industry
has been and
built the
satisfactory use
of this
product
provesthe soundness ofthe original designand specification.
Increasingly severe service demands at thetimeofthe
Committee’s organization had
beenmetby using the nearest available pipe
or
tubing for heavier sections such as casing,
mechanicaltubing, etc., with resultinguneconomicalmultiplicity ofwallthicknesses.
Subsequently, the Committee, withthecooperation
of the industry, made a survey of
existing practice as the logical starting point
for
the development of an American Standard.
Fromthis survey, a table was designed to provide a selectionofwall thicknesses ofpipe
to cover the power piping requirements of industry where strength to resist internal pressure
governsselection andwas later expandedtoincludepipe
diameters and thicknesses used
in other industries.
The original intent
of
the
Committee was to establish
a
system of Schedule Numbers
for size/wall
pipe
thickness
combinations
which
would an
have approximately
uniform
loo0
times
the
P/S
expression contained
in
the
modified
Barlow
relationship equal
to
formula for pipewallthickness as defined
in
theAppendixtothis
standard. The resulting
Numbersdeparted
so
far from existing wall thicknesses
in
commonusethattheoriginal
intent could not beaccomplished. The Schedule Numberswerethen adopted strictly as a
convenient designationsystemfor use
in
ordering.
Inall cases, the designer mustbasehisselection
on the rules and allowable stresses set
by the code which governs his particular construction. The table is dimensionally complete
for all sizes andwallthicknesseswithinits
scope, but some of
the larger, heavier wall
sections arebeyond the capability
of
seamlessmillproductionandmustbeobtainedfrom
or
othersources.
forged andboredbillets
The first of
issuethis
standard was given the
with
designation American
Standard
American Standards Association in November 1935. Subsequent slight
“tentative”
by
the
the footnotes of thedimensional tables wereapprovedand
the
revisionsto Table
1
and
ASA changedthedesignation toAmerican Standard; the date ofASA approval wasApril
28,
1939.
Further revisions weremade by theSectional Committee. The list of specifications
in
Table
1
was
revisedwherenecessary
and slightrevisions
in
wall thicknesses of some of
P/S
valueswereout
of line.
thelarge sizes of theheavyschedulesweremadewhere
It
wasthehope
in
1939
thatthedesignation
of
pipeused commercially by all industry
as
Standard weight, Extra-Strong, and Double Extra-Strong would
gradually be replaced by
Schedule Number
designation.
However,
owing
to
customs
of
over
50
years’ standing,
111
In
March
1927,
the
American
...
COPYRIGHT American Society of Mechanical Engineers
Licensed by Information Handling Services
demand and production of pipe to these traditional dimensionsis undiminished. Consequently,
in
response
to a demand users,
from
accepted
practice
for dimensions weights
and
of
commercialwroughtsteelandweldedwroughtironpipewereadded.Thesechangeswere
designated an AmericanStandardonFebruary23,1950.
SubcommitteeNo. 1 was reorganized
in
1957. In additiontonecessaryeditorialchanges,
a simplifiedformat was selected for thetables
of
weightsand dimensions
so
astoinclude
andidentifythe sizes andweights ofAPI Standards
5L
and
5LX.
These changestothe
standard were approved and
it
was designated an American Standard on December
21,
1959.
The standardwasrevised
in
1969. A uniformmethodto calculate theplainendweight
in
the
tabulatedweights
of
ofsteel
pipe
wasincluded,andminoradjustmentsweremade
steelpipeinTable
2
toconformtothis
newmethod.Additional sizes andthicknesses of
use were also addedto Table 2. InasmuchasAPI
steelpipethathadcomeintocommon
longer
included
wrought pipe,
iron reference this Standard
to API
was
Standard
5L
no
deletedfrom Table
3.
These changesto the standardwereapprovedanditwasdesignated
3,
1970.
an AmericanNationalStandardonFebruary
Furtherrevisionsweremadetothestandard
in
1975.Additional sizes andthicknesses
ofsteelpipethathadbeenaddedtoAPIspecificationswereaddedto
Table
2.
Table3,
DimensionsandWeightsofWeldedWroughtIronPipe,
was deleted
in
its
entirety, since
wroughtironpipeisnolongerproduced.Thesechanges
in thestandardwereapproved
5 ,
1975.
anditwasdesignated
an AmericanNationalStandardonJune
The standardwasrevised
in
1978toinclude
SI
metric dimensions. The outside diameter
by
andwallthicknesseswereconvertedtomillimeters
by multiplyingtheinchdimensions
25.4.
Outside
diameters
larger
than
16
in.
were
rounded the
to nearest
millimeter,
and
0.1
mm.Wallthicknesses
outside diameters 16 in. andsmallerwereroundedtothenearest
wereroundedtothenearest0.01mm.Theseconvertedandrounded
SI
metricdimensions
wereaddedtoTable2.
A
formulatocalculatethe
SI metricplainendmass,
in
kilograms
per meter, using
SI
metric diameters and thicknesses was added to section
5.
The
SI
metric
plain end masswascalculatedand
wasaddedto
Table 2. These changes
in
thestandard
wereapprovedanditwasdesignatedanAmericanNationalStandardonJuly18,1979.
in
1984. The ANSIdesignations,whicharenolonger
in
Furtherrevisionsweremade
use,weredeletedfrom
Table
1,
andthelist
of specificationswasrevisedto
agree
with
current
ASTM API
and specifications.
Additional and
sizes thicknesses
which been
had
added API
to specifications added
were
to
Table
2.
That
edition approved
was
as
an
AmericanNationalStandardonAugust19,1985.
The next edition included additional wall thicknesses and
was approved by
the
American
NationalStandardsInstitute onAugust24,1995.
The 1996 edition contained revisions to Table
2, adding pipe sizes, changing some plain
endweightsandmasses,identifyingmetricpipe
by the dimensionless designator DN,and
eliminatingtheAPISpecificationcolumn.The
1996 editionwasapprovedas
an American
23,
1996.
NationalStandardonSeptember
The current edition contains revisions to
Table 2 toincludethereviseddensityforsteel
incorporatedintoSection
5
previously. Table
1
was deleted and other editorial changesto
Sections
1,
2,
3,
5,
8, and
9
were made. This edition was approved as an American National
I,
2000.
StandardonDecember
iv
COPYRIGHT American Society of Mechanical Engineers
Licensed by Information Handling Services

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