FprEN ISO 13679
(Main)Petroleum and natural gas industries - Procedures for testing casing and tubing connections (ISO/FDIS 13679:2011)
Petroleum and natural gas industries - Procedures for testing casing and tubing connections (ISO/FDIS 13679:2011)
2021-02-04 (data): WI cancelled following cancellation of the corresponding ISO WI in 2018.
Erdöl- und Erdgasindustrie - Prüfverfahren an Verbindungen für Futter- und Steigrohre (ISO/FDIS 13679:2011)
Industries du pétrole et du gaz naturel - Modes opératoires d'essai des connexions pour tubes de cuvelage et de production (ISO/FDIS 13679:2011)
Industrija za predelavo nafte in zemeljskega plina - Postopki za preskušanje spojev za zaščitne in proizvodne (dvižne) cevi (ISO/DIS 13679:2009)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2009
,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD3RVWRSNL]DSUHVNXãDQMH
VSRMHY]D]DãþLWQHLQSURL]YRGQH GYLåQH FHYL ,62',6
Petroleum and natural gas industries - Procedures for testing casing and tubing
connections (ISO/DIS 13679:2009)
Erdöl- und Erdgasindustrie - Prüfverfahren an Verbindungen für Futter- und Steigrohre
(ISO/DIS 13679:2009)
Industries du pétrole et du gaz naturel - Procédures de test des connexions pour tubes
de cuvelage et de production (ISO/DIS 13679:2009)
Ta slovenski standard je istoveten z: prEN ISO 13679
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
DRAFT
prEN ISO 13679
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2009
ICS 75.180.10 Will supersede EN ISO 13679:2006
English Version
Petroleum and natural gas industries - Procedures for testing
casing and tubing connections (ISO/DIS 13679:2009)
Industries du pétrole et du gaz naturel - Procédures de test Erdöl- und Erdgasindustrie - Prüfverfahren an
des connexions pour tubes de cuvelage et de production Verbindungen für Futter- und Steigrohre (ISO/DIS
(ISO/DIS 13679:2009) 13679:2009)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 12.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 13679:2009: E
worldwide for CEN national Members.
prEN ISO 13679:2009 (E)
Contents Page
Foreword .3
prEN ISO 13679:2009 (E)
Foreword
This document (prEN ISO 13679:2009) has been prepared by Technical Committee ISO/TC 67 "Materials,
equipment and offshore structures for petroleum and natural gas industries" in collaboration with Technical
Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum, petrochemical and
natural gas industries”, the secretariat of which is held by AFNOR.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 13679:2006.
Endorsement notice
The text of ISO/DIS 13679:2009 has been approved by CEN as a prEN ISO 13679:2009 without any
modification.
DRAFT INTERNATIONAL STANDARD ISO/DIS 13679
ISO/TC 67/SC 5 Secretariat: JISC
Voting begins on: Voting terminates on:
2009-05-14 2009-10-14
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Petroleum and natural gas industries — Procedures for testing
casing and tubing connections
Industries du pétrole et du gaz naturel — Procédures de test des connexions pour tubes de cuvelage et de
production
[Revision of first edition (ISO 13679:2002)]
ICS 75.180.10; 75.200
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©
International Organization for Standardization, 2009
ISO/DIS 13679
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ii ISO 2009 – All rights reserved
ISO/DIS 13679
Contents Page
Foreword .v
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms and definitions and symbols and abbreviations.2
3.1 Terms and definitions .2
3.2 Symbols.4
3.3 Abbreviations.7
4 General requirements .9
4.1 Connection data sheet.9
4.2 Quality control .9
5 General test requirements.10
5.1 Test classes .10
5.2 Test matrix .11
5.3 Test programme .20
5.4 Calibration and accreditation requirements.21
5.5 Material property tests.22
5.6 Make–up and break–out procedures.23
5.7 Internal pressure leak detection .25
5.8 Internal pressure leak trap device .30
5.9 External pressure leak detection.32
5.10 Data acquisition and test methods.36
5.11 Elevated temperature tests .39
6 Connection test specimen preparation.40
6.1 General connection test objectives.40
6.2 Connection test specimen identification and marking.42
6.3 Connection test specimen preparation.42
6.4 Connection test specimen machining.44
6.5 Machining tolerances.45
6.6 Grooved torque shoulder .47
7 Test procedures.48
7.1 Principle .48
7.2 Make–up/break–out tests.49
7.3 Test load envelope tests.51
7.4 Limit load tests .71
7.5 Limit load test path.74
8 Acceptance criteria .76
8.1 Make–up and break–out tests .76
8.2 Test load envelope tests.76
8.3 Limit load tests .77
9 Test report.77
Annex A (normative) Connection data sheet.78
Annex B (informative) Test load envelope by Critical Cross Section Method.80
Annex C (normative) Data forms.86
Annex D (normative) Connection full test report .110
ISO/DIS 13679
Annex E (normative) Calculations for Pipe Body 100% Load Envelope and Test Load Point
Definitions . 115
Annex F (informative) Frame load range determination. 133
Annex G (informative) Connection product line qualification . 134
Annex H (informative) Special application testing. 142
Annex I (informative) Rationale for design basis. 149
Annex J (informative) Independent seal testing of connections with metal–to–metal and resilient
seals . 152
Annex K (informative) Summary of changes to ISO 13679:2002 as of April 2009. 155
iv © ISO 2009 – All rights reserved
ISO/DIS 13679
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non–governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electro–technical Commission (IEC) on all matters of electro–technical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 13679 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 5, Casing, tubing and drill pipe.
This second edition cancels and replaces the first edition (ISO 13679:2002). Refer to Annex K for a listing of
the parts of this document that have been technically revised.
The “Highlighting in gray change–identification system” and the “Summary of changes” shown in informative
Annex K identify sections of this document where committee–agreed changes (additions, modifications,
and/or deletions) affecting the performance of the product(s) or the technical requirement(s) applicable to the
product(s) have been made from the previous edition of this International Standard. While efforts have been
made to ensure the accuracy and consistency of the application of the change–identification system, the user
of this International Standard is both: encouraged to consider the totality of the technical content of this
International Standard rather than those changes identified, and is ultimately responsible for recognizing any
differences between this and previous editions of the International Standard.
ISO/CS expressly disclaims any liability or responsibility for loss or damage resulting from inappropriate use of
this International Standard based on inaccuracy of the “change–identification system.
ISO/DIS 13679
Introduction
This International Standard is part of a process to provide reliable tubing and casing connections for the oil
and natural gas industry which are fit for purpose. It has been developed based on improvements to API
Recommended Practice 5C5 and proprietary test procedures, with input from leading users, manufacturers
and testing consultants from around the world. This International Standard represents the knowledge of many
years of testing and qualification experiences.
The validation of connection test load envelope and failure limit loads is relevant to design and tubing and
casing for the oil and natural gas industries. Tubing and casing are subject to loads which include internal
pressure, external pressure, axial tension, axial compression, bending torsion, transverse forces and
temperature changes. The magnitude and combination of these loads result in various pipe body and
connection failure modes. Although pipe body test and limit loads are well understood in general, the same
cannot be stated for the connection. These failure modes and loads are generally different and often less
than that of the pipe. Consequently experimental validation is required.
The validation of test and limit loads requires testing at the extremes of performance parameters to these
defined loads. Testing at the extremes of the performance parameters assures that the production population,
which falls within these limits will meet or exceed the performance of the test population. Thread connection
performance parameters include dimensional tolerances, mechanical properties, surface treatment, make–up
torque and the type and amount of thread compound. For typical proprietary connections, worst–case
tolerances are known and defined in this International Standard. For other connections design analysis is
required to define worst–case tolerance combinations.
Users of this International Standard should be aware that further or differing requirements might be needed for
individual applications. This International Standard is not intended to inhibit a vendor from offering, or a
purchaser from accepting, alternate equipment or engineering solutions for the individual application. This
may be particularly applicable when there is innovative or developing technology. Where an alternative is
offered, the vendor should identify any variations from this International Standard and provide details.
This International Standard consists of the following major parts. Based on manufacturer's–supplied data
specified in Annex A and/or calculations in Annex B, tested are conducted in accordance with Clauses 4 to 8
and reported on the data forms given in Annex C. Annex D lists all the information that is to be provided in the
full test report. Annex E provides calculations for pipe body 100% load envelope and test load point
definitions. Annex F give an example of a load frame calibration. Annex G gives considerations for possible
connection product line qualifications. Annex H provides guidelines for supplemental tests, which may be
required for special applications. Annex I gives the design rationale for this International Standard. Annex J
gives requirements for connections that contain both a metal–to–metal seal and a resilient seal which are
tested separately.
Supplementary tests may appropriate for specific applications that are not evaluated by the tests herein. The
user and manufacturer should discuss well applications and limitations of the connection being considered.
Representatives of users and/or other third party personnel are encourages to monitor the tests. ISO 13679
covers the testing of connections for the most commonly encountered well conditions. Not all possible service
scenarios are included. For example, the presence of a corrosive fluid, which may influence the service
performance of a connection, is not considered.
This International Standard includes provisions of various nature. Theses are identified by the use of certain
verbal forms:
⎯ SHALL is used to indication that a provision is a REQUIREMENT, i.e. MANDATORY;
⎯ SHOULD is used to indicate that a provision is a RECOMMENDATION to be used as good practice, but
is not mandatory;
vi © ISO 2009 – All rights reserved
ISO/DIS 13679
⎯ MAY is used to indicate that a provision is OPTIONAL, i.e. indicate a course of action permissible withing
the limits of the document;
⎯ CAN is used to indicate statements of POSSIBILITY and CAPABILITY.
DRAFT INTERNATIONAL STANDARD ISO/DIS 13679
Petroleum and natural gas industries — Procedures for testing
casing and tubing connections
1 Scope
This International Standard establishes minimum design verification testing procedures and test acceptance
criteria for casing and tubing connections for the oil and natural gas industries. These physical tests are part of
a design verification process and provide objective evidence that the connection conforms to the
manufacturer's claimed test load envelope and limit loads.
It categorizes test severity into four test classes.
This International Standard does not provide the statistical basis for risk analysis.
This International Standard addresses only three of the five distinct types of primary loads to which casing and
tubing strings are subjected in wells: fluid pressure (internal and/or external), axial force (tension or
compression), bending (buckling and/or wellbore deviation), as well as make–up torsion. It does not address
rotation torsion and non–axisymmetric (area, line or point contact) loads.
This International Standard specifies tests to be performed to determine the galling tendency, sealing
performance and structural integrity of casing and tubing connections. The words casing and tubing apply to
the service application and not to the diameter of the pipe.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3183, Petroleum and natural gas industries — Steel pipe for pipeline transportation systems
ISO TR 10400, Petroleum and natural gas industries — Equations and calculations for the properties of
casing, tubing, drill pipe and line pipe used as casing or tubing
ISO 11960, Petroleum and natural gas industries — Steel pipes for use as casing or tubing for wells
ISO 13678, Petroleum and natural gas industries — Evaluation and testing of thread compounds for use with
casing, tubing and line pipe
ISO 13680, Petroleum and natural gas industries — Corrosion–resistant alloy seamless tubes for use as
casing, tubing and coupling stock — Technical delivery conditions
API TR 5C3, Technical Report on Equations and Calculations for Casing, Tubing, and Line Pipe used as
Casing or Tubing; and Performance Properties Tables for Casing and Tubing)
API Spec 5B, Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe
Threads
API Spec 5L, Specification for Line Pipe
ASTM A370, Standard Testing Methods and Definitions for Mechanical Testing of Steel Products
ISO/DIS 13679
3 Terms and definitions and symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms, definitions, symbols and abbreviated terms apply.
3.1.1
100% pipe body load envelope
diagram containing the extremes of pipe body performance based on actual properties.
NOTE Pipe body performance is also known as VME yield or ISO TR 10400/API TR 5C3 for collapse.
3.1.2
ambient temperature
actual temperature of the test specimen located in the test lab room environment
NOTE For the last set of ambient mechanical cycles in TS–B and TS–C, set the temperature of the test specimen
(pipe and connection) to be ≤ 35 °C (95 °F).
3.1.3
axial–pressure load diagram
plot of pressure versus axial load showing pipe and/or connection test load envelope or limit load extremes
3.1.4
connection
one pin and its adjoining coupling side or integral box
3.1.5
connection leak
loss of pressure sealing integrity in the connection.
Note: See clause 8.2 for pressure sealing acceptance criteria.
3.1.6
diametrical interference
the outer diameter of the inner member minus the inner diameter of the outer member
3.1.7
failure load
load at which the pipe body or connection will fail catastrophically as in an axial separation, a rupture, large
permanent deformation (e.g. buckling or collapse) or loss of sealing integrity
3.1.8
galling
cold welding of contacting material surfaces followed by tearing of the metal during further sliding/rotation
NOTE 1 There are several degrees of galling used for repair and reporting purposes as defined in Clause 8.
3.1.9
interference
amount of overlap in diameter of mating members created by the design and tolerances of the members
3.1.10
leak/leakage
any positive displacement of test medium whether in the equipment or the connection
3.1.11
light galling
galling that can be repaired by the use of abrasive paper
2 © ISO 2009 – All rights reserved
ISO/DIS 13679
3.1.12
limit load
load combination extreme (axial load and/or pressure) which defines the failure conditions for the connection
or load combination resulting in large permanent deformation (such as buckling) prior to catastrophic failure
3.1.13
lot
lengths of pipe with the same specified dimensions and grade from the same heat of steel which are heat–
treated as part of a continuous operation (or batch)
3.1.14
material test coupon
cylinder of material from the to be tested pipe and/or coupling stock from which tensile test specimens are cut.
3.1.15
metal–to–metal seal
seal or sealing system that relies on intimate and usually high contact stress of mating metal surfaces to
achieve a seal
NOTE The thread compound can affect, both beneficially and detrimentally, the performance of a metal seal.
3.1.16
moderate galling
galling that can be repaired by the use of fine files and abrasive paper
3.1.17
mother joint
length of pipe or coupling stock from which short lengths are cut for machining connection test specimens
3.1.18
multiple seals
sealing system, which consists of more than one independent barrier, and of which each barrier forms a seal
itself
3.1.19
pipe string
pipe body and the connection
3.1.20
pup joint
short pipe length usually with threaded ends
3.1.21
resilient seal
seal or sealing system, which relies on entrapment of a seal ring within a section of the connection (e.g. in the
thread–form, on a seal area, etc.) to achieve a seal
3.1.22
seal
pressure barrier to prevent the passage of test medium
3.1.23
seal ovality
maximum seal diameter minus the minimum seal diameter divided by the average seal diameter multiplied
by 100
NOTE Seal ovality is expressed as a percentage.
ISO/DIS 13679
3.1.24
severe galling
galling that cannot be repaired by the use of fine files and abrasive paper
3.1.25
single seal
one barrier or multiple barriers that cannot be physically differentiated in their function
3.1.26
specimen
connection between two pieces of pipe that may be composed of one coupling and two pins for coupled
connections or one pin and one box for integral connections
NOTE The specimen can be composed of one coupling and two pins for coupled connections, or one pin and one
box for integral connections.
3.1.27
test load envelope
extremes of loads (axial load, pressure, bending) and temperature within which the connection has been
tested according to this international standard
3.1.28
thread lot
all products manufactured on a given machine during a continuous production cycle that is not interrupted by
a catastrophic tool failure or injurious machine malfunction (excluding worn tools or minor tool breakage), tool
holder change (except rough boring bar) or any other malfunction of either threading equipment or inspection
gauges
3.1.29
thread seal
seal or sealing system, which relies on intimate fitting of the thread–form and usually entrapment of the thread
compound within the thread–form to achieve a seal
3.1.30
VME stress
equivalent stress envelope based on the von Mises–Hencky minimum distortion energy criterion
3.2 Symbols
A area calculated based on the pipe inside diameter
i
A area calculated based on the pipe outside diameter
o
A cross–section area of pipe body
p
C compressive axial force
D specified pipe outside diameter
D inside diameter
i
D outside diameter
o
D effective dogleg severity expressed in degrees per thirty metres
leg
E error in load frame calibration
r
4 © ISO 2009 – All rights reserved
ISO/DIS 13679
E error in load frame calibration expressed in percent
rp
F failure
F total axial force, tension or compression,
a
F bending equivalent axial force
b
F published joint strength of the connection when the joint strength is the compressive rated load of the
c
connection
F actual load frame axial force, tension or compression
f
F indicated load frame axial force, tension or compression
i
F published joint strength of the connection when the joint strength is the tensile parting or failure load of
t
the connection
F published joint strength of the connection when the joint strength is the tensile yield load of the
y
connection
I moment of inertia
I maximum design interference between thread or seal members, resulting from pin and box diameter
max
specification and tolerances
I minimum design interference between thread or seal members, resulting from pin and box diameter
min
specification and tolerances
I range of design interference between thread or seal members, equal to I – I
range max min
K compression efficiency factor of the connection
c
K internal pressure efficiency factor of the connection
pi
K external pressure efficiency factor of the connection
pe
K tension efficiency factor of the connection
t
k , k geometric variable
i o
L length of pin A end from coupling face (or connection) to end cap or grip length
A
L length of pin B end from coupling face (or connection) to end cap or grip length
B
L length of coupling or connection if integral
c
L minimum unsupported pup joint length
pj
M bending moment
M super bending moment
o
p collapse rating for specified OD, specified wall thickness and specified specimen yield strength (see
c
ISO TR 10400, clause 8)
ISO/DIS 13679
p internal pressure
i
p internal pressure with bending
ib
p high internal pressure
ih
p normalized internal test pressure
in
p low internal pressure
il
p internal yield pressure for the pipe body (see ISO TR 10400, Clause 3)
iyp
p external pressure
o
p external pressure with bending
ob
p normalized external test pressure
on
p thermal cycle pressure at elevated temperature
tc
p maximum pressure for an internal fibre stress S
y yt
q actual leak rate to be reported
ac
q maximum allowable flow rate of test medium to determine acceptable connection leak
max
(0,9 cm /15 min)
q observed leak rate
o
R radius of curvature of the pipe body at the axis of the pipe
S 100 % of minimum of the specimen mother joint tensile strength (measured at room temperature or at
t
elevated temperature as given in Table 1) for a pipe member or coupling in a T&C specimen (pin or box
member for an integral connection)
S 100 % of minimum of the specimen mother joint yield strength (measured at room temperature or at
y
elevated temperature as given in Table 1) for a pipe member or coupling in a T&C specimen (pin or box
member for an integral connection)
S 90 % S for Series A and B tests, and 80 % and 90 % for Series C tests, or as agreed to between user
yt y
and manufacturer
t specified pipe wall thickness
t minimum measured wall thickness
ac
T tension axial force
T uniaxial tensile load at 100 % of test load envelope
a
T tension value at 90 % maximum VME tension (see equation B.15 in Annex B)
b
η leak detection system efficiency
lds
σ stress
6 © ISO 2009 – All rights reserved
ISO/DIS 13679
σ axial stress without bending
a
σ axial stress with bending
ab
σ axial stress with super critical bending
ao
σ axial stress due to bending
b
σ axial stress due to super critical bending
bo
σ axial compressive yield strength if available or otherwise axial tensile yield strength
c
σ hoop (tangential) stress
h
σ hoop (tangential) stress at outside diameter
ho
σ radial (normal) stress
r
σ radial (normal) stress at outside diameter
ro
σ transverse tensile yield strength if available or otherwise axial tensile yield strength
t
σ defined transverse compressive yield strength if available or otherwise axial tensile yield strength
tc
σ Von Mises equivalent stress
v
σ axial tensile yield strength
y
3.3 Abbreviations
CAL Connection application level to which the connections are successfully tested
CCS Critical cross–section
CCW Counter–clockwise direction around the test load envelope
CW Clockwise direction around the test load envelope
CEPL Capped end pressure load (tension)
CEYP Capped end yield pressure
CRA Corrosion–resistant alloy
EUE External upset end
FMU Final make–up specimen condition
kN 224,8 lbf
kips 1 000 lbf
ksi 1 000 lbf/in
ISO/DIS 13679
lb pound mass
LL Limit load
LP Load point
LP1 Limit load test path 1
LP2 Limit load test path 2
LP3 Limit load test path 3
LP4 Limit load test path 4
LP5 Limit load test path 5
LP6 Limit load test path 6
M/B Make–up/break–out
MBG Make/break galling test specimen condition
MC Mechanical cycle
MPa 145 lbf/in
MT Material test coupon
MTC Metal seal threaded and coupled connection
MTM Metal–to–metal seal
MU Make–up
OCTG Oil Country Tubular Goods
PEL Pressure End Load
Psi Pounds force/square inch
PTFE Polytetrafluoroethylene
r/min Revolutions per minute
RS Resilient seal
SRG Seal ring groove
Std Standard
TC Thermal cycle
TLE Test load envelop
TS–A Test series A
TS–B Test series B
TS–C Test series C
8 © ISO 2009 – All rights reserved
ISO/DIS 13679
TSC Thread sealing connection
T&C Threaded and coupled
VME Von Mises equivalent stress
XH Extreme High Interference Range
XL Extreme Low Interference Range
4 General requirements
4.1 Connection data sheet
Prior to beginning a test, the manufacturer shall provide a connection data sheet for the product stating its
intended connection application level and its geometry and claimed performance properties in terms of tension,
compression, internal pressure, external pressure, bending, and torque (see Table A.1 for the connection data
sheet). The manufacturer shall provide a drawing, which is representative of the cross–sectional area of the
connection. The manufacturer shall also provide the following in graphical form (VME plot): 100 % Pipe Body
Load Envelope, 90 % Pipe Body Load Envelope, and claimed Test Load Envelope and should quantify limit
loads (see 7.3 which defines loads). The manufacturer's own method of calculation should be used to derive
the claimed test load envelope and to calculate the test loads. Performance data or the method described in
Annex B may be used.
Annex B has been provided as a means by which a manufacturer or user may estimate the test load envelope
using a connection performance model based on capacities of specific critical cross–sections in the
connection.
The manufacturer should define as completely as possible the limit loads for each connection. A user may
also make an independent estimate of the limit loads. Limit loads shall be greater than the test load envelope.
It is critical that the combined load capacity described by the test load envelope be defined near and
throughout the conditions where the dominant load sensitivity of the connection may change from pressure to
axial force and/or bending or vice versa. Connection equations, whether analytically or experimentally based,
shall define the test load envelope for all combinations of pressure and axial force and for bending (as
applicable). These equations shall also be suitable to calculate the test loads based on actual yield strength
and geometry of the specimen and include any other structural or sealing performance requirements. The
form of the equation shall facilitate the calculation of the pressure value given the axial load, with or without
bending.
Since casing and tubing connection designs and the resultant performance can vary widely, no overall
requirement for the minimum number of values in a tabular data format can be mandated. However, it is
expected that approximately 10 combined load values of pressure and axial force per quadrant should be
sufficient to define the test and limit loads. If a connection design exhibits changes in load sensitivities, the
loads at which the changes in load sensitivity occur shall be provided.
In the calculation of both pipe body and connection load capacities, it is the intent of this International
Standard to test the specimens to as high a load or combination of loads as safely practical.
In the event that unanticipated events result in deviations to the detailed requirements and or procedures,
such deviations shall be clearly identified in the documentation and test report.
4.2 Quality control
All quality control procedures for the manufacturing of test specimens shall be documented and shall be
consistent with procedures used for connections manufactured for well service. The connection manufacturer
shall ensure that the connections manufactured for the purpose of these design verification tests are of the
ISO/DIS 13679
same design and manufactured to the same dimensions and extremes of tolerances (see Clause 6) as those
supplied for well service. The connection manufacturer shall issue a declaration of conformity (see
ISO/IEC Guide 22 for an example). The manufacturer shall provide the process control plan. This process
control plan shall include the product drawing number(s) and associated revision level(s) as well as the
procedure number and the associated revision levels for all applicable sub–tier documents (manufacturing,
gauge calibration, gauging procedure, surface treatment, thread compound [type and quantity, or other
amount indicators], make–up procedures, etc.). These procedures and any others determined necessary to
provide a consistent product for well service shall be used during manufacturing of all test specimens (see
A.4).
5 General test requirements
5.1 Test classes
5.1.1 Principle
Connection performance data are generated by testing to the claimed test load envelope. Passing the tests
demonstrates conformance of the connection to the specified connection application level. Failure of some or
all tests may result in a revision of the connection design or a revision of the test or limit loads. In the first case,
the testing shall be repeated. In the second case, the tests that failed shall be repeated unless they conform to
the revised load envelope.
Four test classes, known as connection application levels, are defined. These relate to increasingly arduous
mechanical service conditions in the application of casing and tubing connections. The test classes increase
in severity by increasing the number of test parameters and/or test specimens.
The classes of tests do not include all possible service scenarios. For example, the presence of a corrosive
fluid, which may influence the service performance of a connection is not considered and is beyond the scope
of this International Standard.
The user of this International Standard shall specify the connection applic
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