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86 KB
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USACE / NAVFAC / AFCEC / NASA
UFGS-40 17 26.00 20 (April 2006)
-------------------------------Preparing Activity: NAVFAC
Replacing without change
UFGS-15216N (September 1999)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION TABLE OF CONTENTS
DIVISION 40 - PROCESS INTERCONNECTIONS
SECTION 40 17 26.00 20
WELDING PRESSURE PIPING
04/06
PART 1
GENERAL
1.1
REFERENCES
1.2
RELATED REQUIREMENTS
1.3
DEFINITIONS
1.4
SUBMITTALS
1.5
QUALITY ASSURANCE
1.5.1
Welding Pressure Piping
1.5.2
Procedures
1.5.2.1
Previous Qualifications
1.5.2.2
Performance
1.5.3
Welding Procedures Qualification
1.5.4
Welder and Welding Operator Performance Qualification
1.5.5
Renewal of Qualification
1.5.6
Qualification of Inspection and (NDE) Personnel
1.5.6.1
Inspector Certification
1.5.6.2
NDE Personnel Certification Procedures
1.5.6.3
Welding Procedures and Qualifications
1.5.7
Symbols
1.5.7.1
Weld Identifications
1.5.8
Safety
1.6
ENVIRONMENTAL
1.7
DELIVERY AND STORAGE
PART 2
2.1
PART 3
PRODUCTS
WELDING MATERIALS
EXECUTION
3.1
WELDING
3.2
WELDING OPERATORS
3.3
SUPPORTS
3.4
EXAMINATIONS AND TESTS
3.4.1
Random NDE Testing
3.4.2
Visual Examination
SECTION 40 17 26.00 20
Page 1
3.4.3
Nondestructive Examination
3.4.4
Examinations and Tests by the Government
3.4.5
Piping Subject to 100 Percent NDE
3.5
ACCEPTANCE STANDARDS
3.5.1
Visual
3.5.2
Magnetic Particle Examination
3.5.3
Liquid Penetrant Examination
3.5.4
Radiography
3.5.5
Ultrasonic Examination
3.6
CORRECTIONS AND REPAIRS
-- End of Section Table of Contents --
SECTION 40 17 26.00 20
Page 2
**************************************************************************
USACE / NAVFAC / AFCEC / NASA
UFGS-40 17 26.00 20 (April 2006)
-------------------------------Preparing Activity: NAVFAC
Replacing without change
UFGS-15216N (September 1999)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2016
**************************************************************************
SECTION 40 17 26.00 20
WELDING PRESSURE PIPING
04/06
**************************************************************************
NOTE: This guide specification covers the
requirements for welding of piping and piping system
components which will contain fluids under pressure
including hydraulic systems.
Adhere to UFC 1-300-02 Unified Facilities Guide
Specifications (UFGS) Format Standard when editing
this guide specification or preparing new project
specification sections. Edit this guide
specification for project specific requirements by
adding, deleting, or revising text. For bracketed
items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in
respective project, whether or not brackets are
present.
Comments, suggestions and recommended changes for
this guide specification are welcome and should be
submitted as a Criteria Change Request (CCR).
**************************************************************************
**************************************************************************
NOTE: Piping materials, components, and supports
are specified in other sections of the project
specifications.
**************************************************************************
**************************************************************************
NOTE: The following information shall be shown on
the project drawings:
1. Tensile strength, elongation, shear strength,
size, length, type, and location of the welds, as
necessary.
2. The project drawings should be checked to ensure
that any supplementary information required by the
paragraphs has been shown and that there is no
conflict between the drawings and the
SECTION 40 17 26.00 20
Page 3
specifications. See also Note in paragraph entitled
"Definitions." The project drawings must indicate,
or text of the project specifications must specify,
the tensile strength, elongation, shear strength,
size, length, type, and location of the welds, as
necessary.
**************************************************************************
PART 1
1.1
GENERAL
REFERENCES
**************************************************************************
NOTE: This paragraph is used to list the
publications cited in the text of the guide
specification. The publications are referred to in
the text by basic designation only and listed in
this paragraph by organization, designation, date,
and title.
Use the Reference Wizard's Check Reference feature
when you add a RID outside of the Section's
Reference Article to automatically place the
reference in the Reference Article. Also use the
Reference Wizard's Check Reference feature to update
the issue dates.
References not used in the text will automatically
be deleted from this section of the project
specification when you choose to reconcile
references in the publish print process.
**************************************************************************
The publications listed below form a part of this specification to the
extent referenced. The publications are referred to within the text by the
basic designation only.
AMERICAN PETROLEUM INSTITUTE (API)
API Std 1104
(2013; Errata 1-3; Addendum 1 2014)
Welding of Pipeline and Related Facilities
AMERICAN SOCIETY FOR NONDESTRUCTIVE TESTING (ASNT)
ASNT SNT-TC-1A
(2014) Recommended Practice for Personnel
Qualification and Certification in
Nondestructive Testing
AMERICAN WELDING SOCIETY (AWS)
AWS A2.4
(2012) Standard Symbols for Welding,
Brazing and Nondestructive Examination
AWS A3.0M/A3.0
(2010) Standard Welding Terms and
Definitions
AWS B2.1/B2.1M
(2014) Specification for Welding Procedure
and Performance Qualification
SECTION 40 17 26.00 20
Page 4
AWS D1.1/D1.1M
(2015) Structural Welding Code - Steel
AWS QC1
(2007) Standard for AWS Certification of
Welding Inspectors
AWS Z49.1
(2012) Safety in Welding and Cutting and
Allied Processes
ASME INTERNATIONAL (ASME)
ASME B31.1
(2014; INT 1-47) Power Piping
ASME B31.3
(2014) Process Piping
ASME B31.4
(2012) Pipeline Transportation Systems for
Liquid Hydrocarbons and Other Liquid
ASME B31.5
(2013) Refrigeration Piping and Heat
Transfer Components
ASME B31.9
(2014) Building Services Piping
ASME BPVC SEC I
(2010) BPVC Section I-Rules for
Construction of Power Boilers
ASME BPVC SEC II-C
(2010) BPVC Section II-Materials Part
C-Specifications for Welding Rods
Electrodes and Filler Metals
ASME BPVC SEC IX
(2010) BPVC Section IX-Welding and Brazing
Qualifications
ASME BPVC SEC V
(2010) BPVC Section V-Nondestructive
Examination
U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)
29 CFR 1910
Occupational Safety and Health Standards
29 CFR 1926
Safety and Health Regulations for
Construction
1.2
RELATED REQUIREMENTS
**************************************************************************
NOTE: The project drawings should be checked to
ensure that any supplementary information required
by the paragraphs has been shown and that there is
no conflict between the drawings and the
specifications.
**************************************************************************
Section 23 03 00.00 20 BASIC MECHANICAL MATERIALS AND METHODS applies to
this section with the additions and modifications specified herein.
1.3
DEFINITIONS
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
SECTION 40 17 26.00 20
Page 5
Welding pressure piping
SD-07 Certificates
Welding procedures qualification
Nondestructive examination (NDE) procedures
NDE personnel certification procedures
Inspector certification
Submit inspector certification and NDE personnel certification
for record.
SD-11 Closeout Submittals
Weld identifications
1.5
QUALITY ASSURANCE
1.5.1
Welding Pressure Piping
Show location, length, and type of welds, and indicate postweld heat
treatment and nondestructive testing as required.
1.5.2
Procedures
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
ANSI B31.2, "Fuel Gas Piping," and ASME B31.8, "Gas
Transmission and Distribution Piping Systems," not
listed under paragraph entitled "References," may be
used.
**************************************************************************
Develop and qualify procedures for welding metals included in the work. Do
not start welding until welding procedures, welders, and welding operators
have been qualified. Perform qualification testing by an approved testing
laboratory, or by the Contractor if approved by the Contracting Officer in
accordance with the qualified procedures. Notify the Contracting Officer
at least 24 hours in advance of the time and place of the tests. When
practicable, perform the qualification tests at or near the work site.
Maintain current records of the test results obtained in welding procedure,
welding operator/welder performance qualifications, and nondestructive
examination (NDE) procedures. These records shall be readily available at
the site for examination by the Contracting Officer.Qualify the procedures
for making transition welds between different materials or between plates
or pipes of different wall thicknesses. [ANSI Piping] [_____] requirements
for branch connections may be used in lieu of detailed designs. Unless
otherwise specified, the choice of welding process shall be the
responsibility of the Contractor.
1.5.2.1
Previous Qualifications
Welding procedures, welders, and welding operators previously qualified by
test may be accepted for the work without requalification provided that the
following conditions are fulfilled:
SECTION 40 17 26.00 20
Page 7
Welding pressure piping
SD-07 Certificates
Welding procedures qualification
Nondestructive examination (NDE) procedures
NDE personnel certification procedures
Inspector certification
Submit inspector certification and NDE personnel certification
for record.
SD-11 Closeout Submittals
Weld identifications
1.5
QUALITY ASSURANCE
1.5.1
Welding Pressure Piping
Show location, length, and type of welds, and indicate postweld heat
treatment and nondestructive testing as required.
1.5.2
Procedures
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
ANSI B31.2, "Fuel Gas Piping," and ASME B31.8, "Gas
Transmission and Distribution Piping Systems," not
listed under paragraph entitled "References," may be
used.
**************************************************************************
Develop and qualify procedures for welding metals included in the work. Do
not start welding until welding procedures, welders, and welding operators
have been qualified. Perform qualification testing by an approved testing
laboratory, or by the Contractor if approved by the Contracting Officer in
accordance with the qualified procedures. Notify the Contracting Officer
at least 24 hours in advance of the time and place of the tests. When
practicable, perform the qualification tests at or near the work site.
Maintain current records of the test results obtained in welding procedure,
welding operator/welder performance qualifications, and nondestructive
examination (NDE) procedures. These records shall be readily available at
the site for examination by the Contracting Officer.Qualify the procedures
for making transition welds between different materials or between plates
or pipes of different wall thicknesses. [ANSI Piping] [_____] requirements
for branch connections may be used in lieu of detailed designs. Unless
otherwise specified, the choice of welding process shall be the
responsibility of the Contractor.
1.5.2.1
Previous Qualifications
Welding procedures, welders, and welding operators previously qualified by
test may be accepted for the work without requalification provided that the
following conditions are fulfilled:
SECTION 40 17 26.00 20
Page 7
a.
Copies of welding procedures, procedure qualification test records, and
welder and welding operator performance qualification test records are
submitted and approved in accordance with the paragraph entitled
"Submittals."
b.
Testing was performed by an approved testing laboratory or technical
consultant or by the Contractor's approved quality control organization.
c.
The welding procedures, welders, and welding operators were qualified
in accordance with ASME BPVC SEC IX or AWS B2.1/B2.1M, AR-2 level; and
base materials, filler materials, electrodes, equipment, and processes
conformed to the applicable requirements of this specification.
d.
The requirements of paragraph entitled "Welder and Welding Operator
Performance Qualification" for renewal of qualification were met, and
records showing name of employer and period of employment using the
process for which qualified are submitted as evidence of conformance.
1.5.2.2
Performance
**************************************************************************
NOTE: The paragraphs will be edited and inserted if
necessary to ensure proper implementation of the
"CONTRACTOR QUALITY CONTROL PROGRAM." The
specification writer or design engineer must
indicate how much quality control of welding is
needed for each project and who is to be
responsible, i.e., primarily the Contractor or the
Government. If quality control is to be the
responsibility of the Government, delete paragraphs
entitled "Performance" and "Qualification of
Inspection and Nondestructive Examination (NDE)
Personnel" through "NDE Personnel Qualification" and
renumber paragraphs as necessary. Rarely will a
project require 100 percent testing of welds by NDE
methods. The designer must determine the required
methods and the extent of inspection and testing and
must indicate the extent in this or other sections
of the project specifications or on the project
drawings by notes, nondestructive test symbols, or
other means. The specifications or project drawings
must clearly indicate which joints require 100
percent NDE inspection, which joints require random
NDE inspection, and which NDE methods are to be
employed for each joint. For random inspection, the
project drawings must indicate the location, number
of joints, and minimum increment length of weld that
will be subject to NDE inspection without
predisclosing the exact spots to be examined. Joints
not indicated to be tested by NDE methods shall be
subject to visual inspection only. In cases where
the nature of the welding is such as to require
visual inspection only, the requirements for
nondestructive examinations should be deleted from
these paragraphs and from paragraph entitled
"Qualification of Inspection and Nondestructive
Examination (NDE) Personnel."
**************************************************************************
SECTION 40 17 26.00 20
Page 8
The Contractor shall be responsible for the quality of joint preparation,
welding, and examination. Clearly identify and record materials used in
the welding operations. The examination and testing defined in this
specification are minimum requirements. Provide additional examination and
testing as necessary to achieve the quality required.
1.5.3
Welding Procedures Qualification
**************************************************************************
NOTE: The project drawings must indicate, or text
of the project specifications must specify, the
tensile strength, elongation, shear strength, size,
length, type, and location of the welds, as
necessary.
**************************************************************************
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
ANSI B31.2, "Fuel Gas Piping," and ASME B31.8, "Gas
Transmission and Distribution Piping Systems," not
listed under paragraph entitled "References," may be
used.
**************************************************************************
Qualification of the welding procedures for each group of materials to be
welded is required as indicated in ASME BPVC SEC IX. Record in detail and
qualify the "Welding Procedure Specifications" for every welding procedure
proposed. Qualification for each welding procedure shall conform to the
requirements of ANSI Standards and to this specification. The welding
procedures shall specify end preparation for welds, including cleaning,
alignments, and root openings. Preheat, interpass temperature control, and
postheat treatment of welds shall be as required by ANSI Piping documents,
unless otherwise indicated or specified. Describe the type of backing
rings or consumable inserts, if used, and, if they are to be removed, the
removal process. Welding procedure qualifications shall be identified
individually and referenced on the shop drawings or suitably keyed to the
contract drawings.
1.5.4
Welder and Welding Operator Performance Qualification
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
ANSI B31.2, "Fuel Gas Piping," and ASME B31.8, "Gas
Transmission and Distribution Piping Systems," not
listed under paragraph entitled "References," may be
used.
**************************************************************************
Qualify each welder and welding operator assigned to work covered by this
specification by performance tests using equipment, positions, procedures,
base metals, and electrodes or bare filler wires from the same
specification, classification, or group number that will be encountered on
his assignment. Welders or welding operators who make acceptable procedure
qualification tests will be considered performance-qualified for the
welding procedure used. Determine performance qualification in accordance
with [ASME BPVC SEC IX, [ANSI Piping Standards]] [_____] and as specified.
SECTION 40 17 26.00 20
Page 9
1.5.5
Renewal of Qualification
Requalification of a welder or welding operator shall be required under one
or any combination of the following conditions:
a.
When a welder or welding operator has not used the specific welding
process for a period of 3 months. The period may be extended to 6
months if the welder has been employed on another welding process.
b.
There is specific reason to question the welder's ability to make welds
that will meet the requirements of the specifications.
c.
The welder or welding operator was qualified by an employer other than
those firms performing work under this contract and a qualification
test has not been taken within the preceding 12 months. Renewal of
qualification under this condition need be made on only a single test
joint or pipe of any thickness, position, or material to reestablish
qualification for any thickness, position, or material for which the
welder or welding operator had qualified previously.
1.5.6
Qualification of Inspection and (NDE) Personnel
Qualification of Inspection and Nondestructive Examination (NDE) Personnel:
Qualify inspection and nondestructive examination personnel in accordance
with the following requirements:
1.5.6.1
Inspector Certification
Qualify welding inspectors in accordance with AWS QC1.
1.5.6.2
NDE Personnel Certification Procedures
**************************************************************************
NOTE: The paragraphs will be edited and inserted if
necessary to ensure proper implementation of the
"CONTRACTOR QUALITY CONTROL PROGRAM." The
specification writer or design engineer must
indicate how much quality control of welding is
needed for each project and who is to be
responsible, i.e., primarily the Contractor or the
Government. If quality control is to be the
responsibility of the Government, delete paragraphs
entitled "Performance" and "Qualification of
Inspection and Nondestructive Examination (NDE)
Personnel" through "NDE Personnel Qualification" and
renumber paragraphs as necessary. Rarely will a
project require 100 percent testing of welds by NDE
methods. The designer must determine the required
methods and the extent of inspection and testing and
must indicate the extent in this or other sections
of the project specifications or on the project
drawings by notes, nondestructive test symbols, or
other means. The referenced applicable publications
and Army Technical Manual, "Welding Design,
Procedures and Inspection," TM-5-805-7, will be used
for guidance in determining inspection and testing
requirements. The specifications or project
drawings must clearly indicate which joints require
100 percent NDE inspection, which joints require
SECTION 40 17 26.00 20
Page 10
random NDE inspection, and which NDE methods are to
be employed for each joint. For random inspection,
the project drawings must indicate the location,
number of joints, and minimum increment length of
weld that will be subject to NDE inspection without
predisclosing the exact spots to be examined. Joints
not indicated to be tested by NDE methods shall be
subject to visual inspection only. In cases where
the nature of the welding is such as to require
visual inspection only, the requirements for
nondestructive examinations should be deleted from
these paragraphs and from paragraph entitled
"Qualification of Inspection and Nondestructive
Examination (NDE) Personnel."
**************************************************************************
Certify NDE personnel and establish a written procedure for the control and
administration of NDE personnel training, examination, and certification.
Base procedures on appropriate specific and general guidelines of training
and experience recommended by ASNT SNT-TC-1A, [Supplement A-Radiographic]
[Supplement B-Magnetic particle] [Supplement C-Ultrasonic] [and]
[Supplement D-Liquid Penetrant].
1.5.6.3
Welding Procedures and Qualifications
a.
Specifications and Test Results: Submit copies of the welding
procedure specifications and procedure qualification test results for
each type of welding required. Approval of any procedure does not
relieve the Contractor of the responsibility for producing acceptable
welds. Submit this information on the forms printed in ASME BPVC SEC IX
or their equivalent.
b.
Certification: Before assigning welders or welding operators to the
work, submit their names, together with certification that each
individual is performance qualified as specified. Do not start welding
work prior to procedure qualification. The certification shall state
the type of welding and positions for which each is qualified, the code
and procedure under which each is qualified, date qualified, and the
firm and individual certifying the qualification tests.
1.5.7
Symbols
Conform to AWS A2.4.
1.5.7.1
Weld Identifications
Submit a list of the welders' names and symbol for each welder. To
identify welds, submit written records indicating the location of welds
made by each welder or welding operator.
1.5.8
Safety
Conform to AWS Z49.1, 29 CFR 1910-SUBPART Q, "Welding, Cutting, and
Brazing," 29 CFR 1926-SUBPART J, "Welding and Cutting."
1.6
ENVIRONMENTAL
Do not perform welding when the quality of the completed weld could be
impaired by the prevailing working or weather conditions. The Contracting
SECTION 40 17 26.00 20
Page 11
Officer will determine when weather or working conditions are unsuitable
for welding.
1.7
DELIVERY AND STORAGE
Deliver filler metals, electrodes, fluxes and other welding materials to
the site in manufacturers' original packages and store in a dry space until
used. Label and design packages properly to give maximum protection from
moisture and to assure safe handling.
PART 2
2.1
PRODUCTS
WELDING MATERIALS
**************************************************************************
NOTE: Normally, selection of the electrodes is done
by the Contractor as part of his qualified welding
procedure. In special cases, if the selection of
the proper electrode is critical to the design, the
designer may specify the electrodes to be used. In
special cases it also may be necessary to specify
the welding process.
**************************************************************************
Comply with ASME BPVC SEC II-C. Welding equipment, electrodes, welding
wire, and fluxes shall be capable of producing satisfactory welds when used
by a qualified welder or welding operator using qualified welding
procedures.
PART 3
3.1
EXECUTION
WELDING
Do not deviate from applicable codes, approved procedures and approved shop
drawings without prior written approval from the Contracting Officer.
Materials or components with welds made off the site will not be accepted
if the welding does not conform to the requirements of this specification
unless otherwise specified. Assign each welder or welding operator an
identifying number, letter, or symbol that shall be used to identify his
welds. Each welder or welding operator shall apply his mark adjacent to
his weld using an approved rubber stamp or felt-tipped marker with
permanent, weatherproof ink or other approved methods that do not deform
the metal. For seam welds, place identification marks adjacent to the
welds at one meter 3 foot intervals. Confine identification by die stamps
or electric etchers to the weld reinforcing crown, preferably in the
finished crater.
3.2
WELDING OPERATORS
Perform welding in accordance with qualified procedures using qualified
welders and welding operators.
3.3
SUPPORTS
Welding of hangers, supports, and plates to structural members shall
conform to AWS D1.1/D1.1M.
SECTION 40 17 26.00 20
Page 12
3.4
EXAMINATIONS AND TESTS
**************************************************************************
NOTE: The paragraphs will be edited and inserted if
necessary to ensure proper implementation of the
"CONTRACTOR QUALITY CONTROL PROGRAM." The
specification writer or design engineer must
indicate how much quality control of welding is
needed for each project and who is to be
responsible, i.e., primarily the Contractor or the
Government. If quality control is to be the
responsibility of the Government, delete paragraphs
entitled "Performance" and "Qualification of
Inspection and Nondestructive Examination (NDE)
Personnel" through "NDE Personnel Qualification" and
renumber paragraphs as necessary. Rarely will a
project require 100 percent testing of welds by NDE
methods. The designer must determine the required
methods and the extent of inspection and testing and
must indicate the extent in this or other sections
of the project specifications or on the project
drawings by notes, nondestructive test symbols, or
other means. The referenced applicable publications
and Army Technical Manual, "Welding Design,
Procedures and Inspection," TM-5-805-7, will be used
for guidance in determining inspection and testing
requirements. The specifications or project
drawings must clearly indicate which joints require
100 percent NDE inspection, which joints require
random NDE inspection, and which NDE methods are to
be employed for each joint. For random inspection,
the project drawings must indicate the location,
number of joints, and minimum increment length of
weld that will be subject to NDE inspection without
predisclosing the exact spots to be examined. Joints
not indicated to be tested by NDE methods shall be
subject to visual inspection only. In cases where
the nature of the welding is such as to require
visual inspection only, the requirements for
nondestructive examinations should be deleted from
these paragraphs and from paragraph entitled
"Qualification of Inspection and Nondestructive
Examination (NDE) Personnel."
**************************************************************************
**************************************************************************
NOTE: Information based on the two tables must be
developed and included in each project
specification. Tables must clearly define the
systems to be inspected and the type of NDE
required. Specify 100 percent NDE when required by
UFC 3-460-01, "Design: Petroleum Fuel Facilities"
and 49 CFR 195, as covered by paragraph entitled
"Piping Subject to 100 percent NDE."
**************************************************************************
Visual and nondestructive examinations shall be performed [by the
Government] [by the Contractor] to detect surface and internal
discontinuities in completed welds. [Employ the services of a qualified
SECTION 40 17 26.00 20
Page 13
TABLE I REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
Maximum Thickness of Reinforcement for Design
Temperature
Thickness of Base
Metal, inches
Over 2
Greater than
750 degrees F
350 degrees F 750 degrees F
Less than 350
degrees C
inch
inch
inch
5/32
The greater of 1/4 inch or 1/8
times the width of the weld in
inches.
NOTES:
1. For double welded butt joints, this limitation on reinforcement given
above shall apply separately to both inside and outside surfaces of the
joint.
2. For single welded butt joints, the reinforcement limits given above
shall apply to the outside surface of the joint only.
3. The thickness of weld reinforcement shall be based on the thickness of
the thinner of the materials being joined.
4. The weld reinforcement thicknesses shall be determined from the higher
of the abutting surfaces involved.
5.
Weld reinforcement may be removed if so desired.
(2)
ASME B31.3, conform to Table II.
TABLE II
Wall Thickness, mm
Height, mm
Less than or equal to 6.40
Less than or equal to 1.60
Greater than 6.40, is less than or equal to
12.70
Less than or equal to 3.20
Greater than 12.70, is less than or equal
to 25.40
Less than or equal to 4.00
Greater than 25.40
Less than or equal to 4.80
NOTES:
SECTION 40 17 26.00 20
Page 19
TABLE II
Wall Thickness, mm
Height, mm
1. Wall thickness is the nominal wall thickness of the thinner of components joined by
butt weld.
2. Height: For "Normal Service" and "Severe Cyclic" conditions, use the listed value.
For "Category D Fluid Service," use twice the listed value. Measure from surfaces of
adjacent components. The lesser of the two measurements, in any plane through the weld,
shall not exceed the applicable value at right. Weld metal shall merge smoothly into
component surfaces.
TABLE II
Wall Thickness, inches
Height, inches
Less than or equal to 1/4
Less than or equal to 1/16
Greater than 1/4, is less than or equal to
1/2
Less than or equal to 1/8
Greater than 1/2, is less than or equal to 1 Less than or equal to 5/32
Greater than 1
Less than or equal to 3/16
NOTES:
1. Wall thickness is the nominal wall thickness of the thinner of components joined by
butt weld.
2. Height: For "Normal Service" and "Severe Cyclic" conditions, use the listed value.
For "Category D Fluid Service," use twice the listed value. Measure from surfaces of
adjacent components. The lesser of the two measurements, in any plane through the weld,
shall not exceed the applicable value at right. Weld metal shall merge smoothly into
component surfaces.
(3)
(4)
ASME B31.4, conform to Table I for under 175 degrees C 350
degrees F.
ASME B31.5, conform to Table III.
TABLE III
Pipe Wall Thickness, mm
Reinforcement
Thickness, mm
6.40 and under
1.60
SECTION 40 17 26.00 20
Page 20
or welding operators shall make repairs using welding procedures which will
develop the full strength of the members cut. Welding shall be subject to
examination and tests in the mill, shop, and field.
3.4.5
Piping Subject to 100 Percent NDE
ASME B31.4 [and ASME B31.3] Piping Subject to 100 Percent NDE: 100 percent
of each day's girth welds installed in the following locations shall be
nondestructively examined 100 percent by radiographic, magnetic particle,
or liquid penetrant examination unless impracticable, in which case at
least 90 percent must be examined. Nondestructive examination must be
impracticable for each girth weld not examined.
a.
At onshore locations where a loss of hazardous liquid (petroleum,
petroleum products, or anhydrous ammonia) could reasonably be expected
to pollute stream, river, lake, reservoir, or other body of water, and
any offshore area;
b.
Within railroad or public road rights-of-way;
c.
At overhead road crossings and within tunnels;
d.
Within the limits of any incorporated subdivision of a State
government; and
e.
Within populated areas, including, but not limited to, residential
subdivisions, shopping centers, schools, designated commercial areas,
industrial facilities, public institutions, and places of public
assembly.
3.5
ACCEPTANCE STANDARDS
**************************************************************************
NOTE: These acceptance standards are taken from
ASME B31.1 and are suitable for most jobs.
Evaluations of indications as given in ASME B31.1
are applicable to these standards. Visual
acceptance standards are given for some other piping
codes. It should be noted that specific project
design requirements may necessitate revision or
expansion to cover different items of work and
varying standards of acceptance.
**************************************************************************
3.5.1
Visual
The following indications are unacceptable:
a.
Cracks--external surface.
**************************************************************************
NOTE: In the text below, if only ASME B31.3 is
applicable, delete all text in brackets. For ASME
B31.3 under normal service conditions, use 25
percent with text in brackets and omit last sentence
in brackets. For ASME B31.4 use 12.5 percent, and
add the material in brackets pertaining to B31.4.
Consider use of ASME B31.1 acceptance standard for
codes other than B31.3 and B31.4.
SECTION 40 17 26.00 20
Page 16
**************************************************************************
b.
Undercut on surface which is greater than 1.00 mm 1/32 inchdeep [or [25
percent for ASME B31.3] [and] [12.5 percent for ASME B31.4 and
ASME B31.9] of the wall thickness, whichever is less,] provided that
the remaining wall thickness is not less than the minimum design
thickness. [For ASME B31.4 and in accordance with API Std 1104,
undercuts over 0.40 mm through 0.80 mm 1/64 inch through 1/32 inch or
over 6 to 12.5 percent of the pipe wall thickness, whichever is
smaller, shall not exceed 51 mm 2 inches in a continuous weld length of
305 mm 12 inches or 1/6 the length of the weld, whichever is smaller;
and undercuts 0.40 mm 1/64 inch or 6 percent of the wall thickness,
whichever is smaller, are acceptable regardless of length.]
**************************************************************************
NOTE: Include Tables I, II, or III below as
applicable to project.
**************************************************************************
c.
Weld reinforcement:
(1)
ASME B31.1, conform to Table I.
TABLE I REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
Maximum Thickness of Reinforcement for Design
Temperature
Thickness of Base
Greater than
Metal, millimeters (mm) 400 degrees C
175 degrees C 400 degrees C
Less than 175
degrees C
mm
mm
mm
Up to 3.00, incl.
2.00
2.50
5.00
Over 3.00 to 5.00,
incl.
2.00
3.00
5.00
Over 5.00 to 13.00,
incl.
2.00
4.00
5.00
Over 13.00 to 25.00,
incl.
2.50
5.00
5.00
Over 25.00 to 50.00,
incl.
3.00
6.00
6.00
Over 50.00
4.00
The greater of 6 mm or 1/8 times
the width of the weld in mm.
NOTES:
SECTION 40 17 26.00 20
Page 17
TABLE I REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
Maximum Thickness of Reinforcement for Design
Temperature
Thickness of Base
Greater than
Metal, millimeters (mm) 400 degrees C
mm
175 degrees C 400 degrees C
Less than 175
degrees C
mm
mm
1. For double welded butt joints, this limitation on reinforcement given
above shall apply separately to both inside and outside surfaces of the
joint.
2. For single welded butt joints, the reinforcement limits given above
shall apply to the outside surface of the joint only.
3. The thickness of weld reinforcement shall be based on the thickness of
the thinner of the materials being joined.
4. The weld reinforcement thicknesses shall be determined from the higher
of the abutting surfaces involved.
5.
Weld reinforcement may be removed if so desired.
TABLE I REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
Maximum Thickness of Reinforcement for Design
Temperature
Thickness of Base
Metal, inches
Greater than
750 degrees F
350 degrees F 750 degrees F
Less than 350
degrees C
inch
inch
inch
1/16
3/32
3/16
Over 1/8 to 3/16, incl. 1/16
1/8
3/16
Over 3/16 to 1/2, incl. 1/16
5/32
3/16
Over 1/2 to 1, incl.
3/32
3/16
3/16
Over 1 to 2, incl.
1/8
1/4
1/4
Up to 1/8, incl.
SECTION 40 17 26.00 20
Page 18
TABLE I REINFORCEMENT OF GIRTH AND LONGITUDINAL BUTT WELDS
Maximum Thickness of Reinforcement for Design
Temperature
Thickness of Base
Metal, inches
Over 2
Greater than
750 degrees F
350 degrees F 750 degrees F
Less than 350
degrees C
inch
inch
inch
5/32
The greater of 1/4 inch or 1/8
times the width of the weld in
inches.
NOTES:
1. For double welded butt joints, this limitation on reinforcement given
above shall apply separately to both inside and outside surfaces of the
joint.
2. For single welded butt joints, the reinforcement limits given above
shall apply to the outside surface of the joint only.
3. The thickness of weld reinforcement shall be based on the thickness of
the thinner of the materials being joined.
4. The weld reinforcement thicknesses shall be determined from the higher
of the abutting surfaces involved.
5.
Weld reinforcement may be removed if so desired.
(2)
ASME B31.3, conform to Table II.
TABLE II
Wall Thickness, mm
Height, mm
Less than or equal to 6.40
Less than or equal to 1.60
Greater than 6.40, is less than or equal to
12.70
Less than or equal to 3.20
Greater than 12.70, is less than or equal
to 25.40
Less than or equal to 4.00
Greater than 25.40
Less than or equal to 4.80
NOTES:
SECTION 40 17 26.00 20
Page 19
TABLE II
Wall Thickness, mm
Height, mm
1. Wall thickness is the nominal wall thickness of the thinner of components joined by
butt weld.
2. Height: For "Normal Service" and "Severe Cyclic" conditions, use the listed value.
For "Category D Fluid Service," use twice the listed value. Measure from surfaces of
adjacent components. The lesser of the two measurements, in any plane through the weld,
shall not exceed the applicable value at right. Weld metal shall merge smoothly into
component surfaces.
TABLE II
Wall Thickness, inches
Height, inches
Less than or equal to 1/4
Less than or equal to 1/16
Greater than 1/4, is less than or equal to
1/2
Less than or equal to 1/8
Greater than 1/2, is less than or equal to 1 Less than or equal to 5/32
Greater than 1
Less than or equal to 3/16
NOTES:
1. Wall thickness is the nominal wall thickness of the thinner of components joined by
butt weld.
2. Height: For "Normal Service" and "Severe Cyclic" conditions, use the listed value.
For "Category D Fluid Service," use twice the listed value. Measure from surfaces of
adjacent components. The lesser of the two measurements, in any plane through the weld,
shall not exceed the applicable value at right. Weld metal shall merge smoothly into
component surfaces.
(3)
(4)
ASME B31.4, conform to Table I for under 175 degrees C 350
degrees F.
ASME B31.5, conform to Table III.
TABLE III
Pipe Wall Thickness, mm
Reinforcement
Thickness, mm
6.40 and under
1.60
SECTION 40 17 26.00 20
Page 20
TABLE III
Pipe Wall Thickness, mm
Reinforcement
Thickness, mm
Over 6.40 through 12.70
2.40
Over 12.70, through 25.40
3.20
Over 25.40
4.80
TABLE III
Pipe Wall Thickness, inches Reinforcement
Thickness, inches
1/4 and under
1/16
Over 1/4 through 1/2
3/32
Over 1/2, through 1
1/8
Over 1
3/16
(5)
ASME B31.9: Thickness of weld reinforcement shall not exceed
4.80 mm 3/16 inch.
d.
Lack of fusion on surface.
e.
Incomplete penetration (applies only when inside surface is readily
accessible).
f.
Convexity of fillet weld surface greater than 10 percent of longest leg
plus 1.0 mm 0.03 inch.
g.
Concavity in groove welds.
h.
Concavity in fillet welds greater than 2.0 mm 1/16 inch.
i.
Fillet weld size less than indicated or greater than 1 1/4 times the
minimum specified fillet leg length.
3.5.2
Magnetic Particle Examination
The following relevant indications are unacceptable:
a.
Any cracks and linear indications.
b.
Rounded indications with dimensions greater than 5.0 mm 3/16 inch.
c.
Four or more rounded indications in a line separated by 2.0 mm 1/16 inch
or less edge-to-edge.
d.
Ten or more rounded indications in any 3870 square mm 6 square inches
of surface, with the major dimension of this area not to exceed 150 mm
6 inches, with the area taken in the most unfavorable location relative
SECTION 40 17 26.00 20
Page 21
to the indications being evaluated.
3.5.3
Liquid Penetrant Examination
Indications whose major dimensions are greater than 2.0 mm 1/16 inch shall
be considered relevant. The following relevant indications are
unacceptable:
a.
Any cracks or linear indications.
b.
Rounded indications with dimensions greater than 5.0 mm 3/16 inch.
c.
Four or more rounded indications in a line separated by 2.0 mm 1/16 inch
or less edge-to-edge.
d.
Ten or more rounded indications in any 3870 square mm 6 square inches
of surface, with the major dimension of this area not to exceed 150 mm
6 inches, with the area taken in the most unfavorable location relative
to the indications being evaluated.
3.5.4
Radiography
Welds that are shown by radiography to have any of the following
discontinuities are unacceptable:
a.
Any type of crack or zone of incomplete fusion or penetration.
b.
Any other elongated indication which has a length greater than:
(1)
6.0 mm 1/4 inch for t up to 19.0 mm 3/4 inch, inclusive;
(2)
1/3 t for t from 19.0 mm 3/4 inch to 57.00 mm 2 1/4 inches,
inclusive;
(3)
19.00 mm 3/4 inch for t over 57.00 mm 2 1/4 inches where t is the
thickness of the thinner portion of the weld.
("t" pertains to the thickness of the weld being examined. If a weld joins
two members having different thickness at the weld, "t" is the thinner of
these two thicknesses.)
c.
Any group of indications in line that have an aggregate length greater
than t in a length of 12t, except where the distance between the
successive indications exceeds 6L where L is the longest indication in
the group.
d.
Porosity in excess of that shown acceptable in Appendix A-250,
Acceptance Standard for Radiographically Determined Rounded Indications
in Welds, ASME BPVC SEC I.
3.5.5
Ultrasonic Examination
Permitted for ASME B31.3 and ASME B31.4 piping only. Linear type
discontinuities are unacceptable if the amplitude exceeds the reference
level and discontinuities have lengths which exceed the following:
a.
6.0 mm 1/4 inch for t up to 19.0 mm 3/4 inch
b.
1/3 t for t from 19.0 mm 3/4 inch to 57.0 mm 2 1/4 inches
SECTION 40 17 26.00 20
Page 22
c.
19.0 mm 3/4 inch for t over 57.0 mm 2 1/4 inches
("t" is the thickness of the weld being examined. If the weld joins two
members having different thickness at the weld, "t" is the thinner of these
two thicknesses. Discontinuities are interpreted to be cracks, lack of
fusion, and incomplete penetration are unacceptable regardless of length.)
3.6
CORRECTIONS AND REPAIRS
**************************************************************************
NOTE: Insert the applicable ANSI piping codes.
ANSI B31.2, "Fuel Gas Piping," and ASME B31.8, "Gas
Transmission and Distribution Piping Systems," not
listed under paragraph entitled "References," may be
used.
**************************************************************************
Remove defects and replace welds as specified in [ANSI Piping Standards]
[_____], unless otherwise specified. Repair defects discovered between
weld passes before additional weld material is deposited. Wherever a
defect is removed, and repair by welding is not required, the affected area
shall be blended into the surrounding surface eliminating sharp notches,
crevices, or corners. After defect removal is complete and before
rewelding, reexamine the area by the same test methods which first revealed
the defect to ensure that the defect has been eliminated. After rewelding,
reexamine the repaired area by the same test methods originally used for
that area. For repairs to base material, the minimum examination shall be
the same as required for butt welds. Indication of a defect shall be
regarded as a defect unless reevaluation by NDE or by surface conditioning
shows that no unacceptable indications are present. The use of foreign
material to mask, fill in, seal, or disguise welding defects will not be
permitted.
**************************************************************************
NOTE: Regarding Table IV, information based on the
table must be developed and included in each project
specification. Tables must clearly define the
systems to be inspected and the type of NDE
required. Specify 100 percent NDE when required by
UFC 3-460-01, "Design: Petroleum Fuel Facilities"
and 49 CFR 195, as covered by paragraph entitled
"Piping Subject to 100 Percent NDE." Where appears,
select 100 percent or random but not both.
**************************************************************************
SECTION 40 17 26.00 20
Page 23
TABLE IV - EXAMINATIONS AND TESTS FOR VARIOUS MATERIALS AND SERVICES
Examinations or Tests Required
Material or
Application
Visual
Radiographic
[Magnetic
Particle]
[or] [Liquid
Penetrant]
Ultrasonic
High-alloy austenitic or nickel steels or nickel alloys for cryogenic service and
vacuum service
a.
Tack welds
Yes
No
No No
b.
Root passes
Yes
No
Yes No
Yes
No
No No
100 percent for DN over
32 mm 60 percent for DN
32mm and less 100
percent for NPS over
1-1/4 inches 60 percent
for NAPA PS 1-1/4 inches
and less
Yes(PT
Yes for wall
only);
thickness
50 mm 1/2
inch and over
c. Intermediate
passes
d.
Completed weld Yes
High-alloy austenitic or nickel steels or nickel alloys for other than cryogenic or
vacuum service
a.
Tack welds
Yes
No
No No
b.
Root passes
Yes
No
[No][Yes]
Yes
No
No No
[100 percent] [Random]
Yes (PT only) [No] [Yes]
c. Intermediate
passes
d.
Completed weld Yes
No
Stainless steel to carbon steel
a.
Completed weld Yes
[No] [Yes] [Random]
Yes (PT only) No
No
No
Carbon steel piping systems
a.
Tack welds
Yes
SECTION 40 17 26.00 20
Page 24
No
TABLE IV - EXAMINATIONS AND TESTS FOR VARIOUS MATERIALS AND SERVICES
Examinations or Tests Required
Material or
Application
Visual
Radiographic
[Magnetic
Particle]
[or] [Liquid
Penetrant]
b.
Yes
No
[No] [Yes MT] No
Yes
No
No
[100 percent] [Random]
[No] [Yes MT] No
Root passes
c. Intermediate
passes
d.
Completed weld Yes
Ultrasonic
No
**************************************************************************
NOTE: Regarding Table V, information based on the
table must be developed and included in each project
specification. Tables must clearly define the
systems to be inspected and the type of NDE
required. Specify 100 percent NDE when required by
UFC 3-460-01, "Design: Petroleum Fuel Facilities"
and 49 CFR 195, as covered by paragraph entitled
"Piping Subject to 100 Percent NDE."
**************************************************************************
TABLE V - MANDATORY MINIMUM NONDESTRUCTIVE EXAMINATIONS FOR ASME B31.1 PIPING
Buttwelds (Girth and
Longitudinal)
Temperatures over
400 degrees C and at
all pressures.
Temperatures between
175 degrees C and
400 degrees C
inclusive and at all
pressures over 7100
kPa gage
All others
RT for DN over 50
mm MT or PT for DN
50 mm and less.
RT for over 50 mm
DN with thickness
over 19 mm. Visual
for all sizes with
thickness 19 mm or
less.
Visual for all sizes
and thicknesses.
SECTION 40 17 26.00 20
Page 25
TABLE V - MANDATORY MINIMUM NONDESTRUCTIVE EXAMINATIONS FOR ASME B31.1 PIPING
Temperatures over
400 degrees C and at
all pressures.
Temperatures between
175 degrees C and
400 degrees C
inclusive and at all
pressures over 7100
kPa gage
All others
Welded Branch
Connections (Size
indicated is Branch
Size)
RT for DN over 50
mm MT or PT for DN
50 mm and less.
RT for branch over
100 mm DN and
thickness of branch
over 19 mm. Visual
for all sizes with
branch thickness 19
mm or less.
Visual for all sizes
and thicknesses.
Fillet, Socket Welds
PT or MT for all
sizes and
thicknesses.
Visual for all sizes
and thicknesses.
Visual for all sizes
and thicknesses.
NOTES:
1. Thickness refers to pressure boundary wall thickness (such as pipe wall, fitting
wall, or nozzle wall thickness).
2. All welds must be given a visual examination in addition to type of specific
nondestructive examination specified.
3.
NPS-Nominal Pipe Size.
4. RT-Radiographic examination; MT-magnetic particle examination; PT-liquid
penetrant examination.
5. RT of branch welds shall be performed before any nonintegral reinforcing material
is applied.
6. The thickness of buttwelds is defined as the thicker of the two abutting ends
after end preparation.
7.
Temperatures and pressures shown are design.
8. In lieu of radiography of welded branch connections when required above, liquid
penetrant or magnetic particle examination is acceptable and, when used, shall be
performed at the lesser of one-half of the weld thickness or each 50 mm of weld
thickness and all accessible final weld surfaces.
SECTION 40 17 26.00 20
Page 26
TABLE V - MANDATORY MINIMUM NONDESTRUCTIVE EXAMINATIONS FOR ASME B31.1 PIPING
Temperatures over
400 degrees C and at
all pressures.
Temperatures between
175 degrees C and
400 degrees C
inclusive and at all
pressures over 7100
kPa gage
All others
9. For nondestructive examination of the pressure retaining component, refer to the
standards listed in applicable code or the manufacturing specifications.
TABLE V - MANDATORY MINIMUM NONDESTRUCTIVE EXAMINATIONS FOR ASME B31.1 PIPING
Temperatures over
750 degrees F and at
all pressures.
Temperatures between
350 degrees F and
750 degrees F
inclusive and at all
pressures over 1052
psig gage
All others
Buttwelds (Girth and
Longitudinal)
RT for NPS over 2
inches MT or PT for
NPS 2 inches and
less.
RT for over 2 inch
NPS with thickness
over 3/4 inch.
Visual for all sizes
with thickness 3/4
inch or less.
Visual for all sizes
and thicknesses.
Welded Branch
Connections (Size
indicated is Branch
Size)
RT for NPS over 2
inch MT or PT for
NPS 2 inch and less.
RT for branch over 4
inch NPS and
thickness of branch
over 3/4 inch.
Visual for all sizes
with branch
thickness 3/4 inch
or less.
Visual for all sizes
and thicknesses.
Fillet, Socket Welds
PT or MT for all
sizes and
thicknesses.
Visual for all sizes
and thicknesses.
Visual for all sizes
and thicknesses.
SECTION 40 17 26.00 20
Page 27
TABLE V - MANDATORY MINIMUM NONDESTRUCTIVE EXAMINATIONS FOR ASME B31.1 PIPING
Temperatures over
750 degrees F and at
all pressures.
Temperatures between
350 degrees F and
750 degrees F
inclusive and at all
pressures over 1052
psig gage
All others
NOTES:
1. Thickness refers to pressure boundary wall thickness (such as pipe wall, fitting
wall, or nozzle wall thickness).
2. All welds must be given a visual examination in addition to type of specific
nondestructive examination specified.
3.
NPS-Nominal Pipe Size.
4. RT-Radiographic examination; MT-magnetic particle examination; PT-liquid
penetrant examination.
5. RT of branch welds shall be performed before any nonintegral reinforcing material
is applied.
6. The thickness of buttwelds is defined as the thicker of the two abutting ends
after end preparation.
7.
Temperatures and pressures shown are design.
8. In lieu of radiography of welded branch connections when required above, liquid
penetrant or magnetic particle examination is acceptable and, when used, shall be
performed at the lesser of one-half of the weld thickness or each 1/2 inch of weld
thickness and all accessible final weld surfaces.
9. For nondestructive examination of the pressure retaining component, refer to the
standards listed in applicable code or the manufacturing specifications.
-- End of Section --
SECTION 40 17 26.00 20
Page 28
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