group a - documents consideredmycommittees.api.org/standards/ecs/sc15/meeting... · suggest: review...

API SC15Group A - Documents considered

SPECIFICATIONS:� 15HR - Specification for High pressure Fiberglass Line Pipe

� 15LR - Specification for Low pressure fiberglass Line pipe

RECOMMENDED PRACTICES:� 15TL4 - Recommended practice for care and use fiberglass tubulars

� 15CLT - Recommended Practice for Composite lined steel tubulars

Relationship of documents: Glass reinforced thermoset resin tubulars, Corrosion resistant, Onshore Oilfield

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Sign in / Introductions

�Sign in�Name�Company name “representing”�Email address�Email address

�Self introduction of Members present

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General meeting practiceAPI requirements-?

How we will conduct these meetings:

General discussion – Free and open, time limits as necessary

Debate – Fair, orderly, time limits as necessary

Voting – Near unanimous will accept as is in group A, controversy tabled debated and vote next meeting. Opinions can be obtained electronically between meetings.

Decisions – based on member consensus with ability to review all positions, presented at meeting or electronically.

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Priority, (inferred by me)

�Specifications: 15HR, 15LR �15HR Primary�15LR naturally draws on HR discussions

�Anticipate similar outcomes�Anticipate similar outcomes

�Existing RP’s -15TL4, CLT

�New Specifications or Rp’s� ** Resources are required for each topic **

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RP 15CLT - Composite lined steel tubulars

�- Member Interest - 15CLt�Alkire, Baker, Baron, Biro, Bryan, Epson,

Granderson, Henize, Urquiza, Mclaughlin, Oney, Posson, Savino, Snider, Oney, Posson, Savino, Snider, Stringfellow,Mehdi, Gu,

Additions/subtractions?

�Primary Interest: Mclaughlin, Snider, Posson,

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RP 15TL4 – care and handling of fiberglass tubes

�- Member Interest – 15TL4�Alkire, Baron, Biro, Brooks, Bryan, Conner,

Epson, Granderson, Henize, Urquiza, Oney, Poshard, Savino, Stringfellow, Fahrer, Mehdi, Poshard, Savino, Stringfellow, Fahrer, Mehdi, Gu, Baker


Primary interest?

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15LR – Specification for low pressure fiberglass pipe

�- Member Interest – 15LR� Alkire, Baron, Biro, Brooks, Bryan, Conner,

Epson, Granderson, Henize, Urquiza, Oney Poshard, Savino, Stringfellow, Fahrer, Mehdi,,, Poshard, Savino, Stringfellow, Fahrer, Mehdi,,, GU, Baker, Moore


Primary interest: Moore, other?

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15HR – Specification High pressure fiberglass pipe

�- Member Interest – 15HR� Alkire, Baron, Biro, Brooks, Bryan, Conner

Epson, Granderson, Henize, Hoijman, Urquiza, Oney, Poshard, Savino, Stringfellow, Fahrer, Oney, Poshard, Savino, Stringfellow, Fahrer, Mehdi, GU, Baker


Primary interest: Granderson, Hoijman, Oney, Additions?

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Participation in SC15-A committee

� Comments/Topics submitted prior to meeting � Interest in website to post comments for open review?

� Website support Available within API? – Shail?

� Volunteer’s within Group A:�15HR lead –�15HR lead –�15LR lead –�15CLT lead –�RP 15TL4 lead –

�Secretary Grp A – (meeting minutes, FGS will provide clerical assistance)�New SC15 documents: ( i.e. interest in down hole, resources?)

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RP 15TL4 – Care and use of fiberglass

� 7.2.3 Threaded Joints �b. Brush dirty threads with a clean wire brush

• Suggest: soft brush, care not to damage threads� 7.3 Pressure Testing (Field)

�7.3.4 pressure testing should not exceed manufacturer’s recommendation – not a standardrecommendation – not a standard

� Suggest a standard for field pressure testing – address directly within the specifications (15LR and 15HR)

• 15HR static design: Field test pressure = 1.25 x maximum system design pressure. Field test pressure shall not exceed 1.25 x API 15HR Standard Pressure Rating. (ref: ASME B31.4 - 437.4.3 Leak Testing for hydrocarbon lines at 1.25 x )

• 15LR cyclic design: 1.5 x Cyclic pressure rating per API 15LR• 15LR static design: 1.25 x static pressure rating

� Discussion: Yield stress - Threshold stress – ISO agreement, relation of field/factory test, option to increase time but not pressure, Axial stress in installed conditions.

� Warn User to confirm by stress analysis in critical applications10

RP15CLT – composite lined steel

�Comments? –

� Interest converting 15CLt to a specification?

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15LR – low pressure fiberglass pipe

� Appendix B- Method of test for the determination of degree of cure by differential scanning calorimetry (DSC). � Suggest: allow other means of Tg measurement i.e. TMA, DMA,

TGA, other to measure Tg in addition to DSC� Relative QA measurement, require a new method to relate to original method

used to measure qualification samples to QA minimums for alternate method.used to measure qualification samples to QA minimums for alternate method.� (applies to API 15HR and CLT as well), Frequency: 1/mixing station /shift)

� 5.3 Minimum Properties: The minimum performance properties requirements only reference “cyclic testing”� Suggest: The inclusion of static performance properties as well

as the specification allows static design� Likely an oversight as 15LR was originally Cyclic design only

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15LR continued

� 5.7 qualification of fittings/joints� 5.7.3 Cyclic or static pressure test� e. The number of cycles or hours to failure for the component must be

no less than that predicted by the HDB line lower 95% prediction limits of the corresponding pipe. � Suggest: Review of ASTM D5685 “168 hours test durations or � Suggest: Review of ASTM D5685 “168 hours test durations or

252,000 cycles” for replacement to 5.7.3.

� 4. 6.1.1 Mill Pressure Test � The Mill pressure test currently references cyclic pressure rating� Suggest: option of Mill pressures based on static pressure rating

� Likely an oversight from previous editions, cyclic based only

� Field pressure test: see 15TL4 recommendation� 1.5 x “standard API cyclic pressure” or 1.25 x “API static pressure” 13

15HR – High pressure pipe

�Comments from Petroplastic� 7.4.2 DSC tests, in accordance with Appendix C, shall also be conducted on

other components than fittings as Flanges, coupling, adapters, reducers, at a frequency of one per 100 units of type, irrespective of size or pressure rating.� Suggestion: Include all components at a minimum frequency of 1%. Believe this was

the intent but worded poorly in 15HR as flanges are defined separately from fittings the intent but worded poorly in 15HR as flanges are defined separately from fittings etc..

� 5.4.1 Regression testing: Early decades (10 to 200 hours) on the re-qualification tests for Pipe and Prime Connection (as well as for fittings) should be eliminated and maintain only the 1000 hours survival testing or propose a survival test with two sets of level of pressures, one from 1000 to 2000 hours for 3 samples and other level for 3 samples that only need to survive more than 3000 hours � Suggestion: To change the failure time frames for regression re-qualification to longer

periods. More on this later.14

15HR - Comments from Petroplastic

� 5.4.1 Changes to the wall thickness of the liner qualified on regression testing should be also considered for re qualification as per ASTM D2992 section 12.� Suggestion: specifically call out Liner thickness changes in appendix A to require

requalification, simply reference ASTM D2992 in addition to APPA. App A to be reviewed for regression comparison.

� 5.4.2 Re qualification Only for fittings (Tees, 90º and 45º elbows), which � 5.4.2 Re qualification Only for fittings (Tees, 90º and 45º elbows), which were qualified by 5.1.2, changes as outlined in Appendix A.1 – A.4, and portions of A.9 are similarly stated in ASTM D2992 12.1. These changes may require Regression testing re qualification to confirm acceptance.

�

� Changes to A.5 – A.8 however are not related to API 15HR pipe regression and should not be re-qualified by the same procedure.

� Propose alternate short term test to approve changes not related to regression testing.

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�5.1.1 Pipe and prime connection� Early decades (10 to 1000 hours) on the qualification tests for Pipe and Prime

Connection (as well as for fittings) should be eliminated and consider the following:

� Suggestion: The number of samples and distribution of failure points � Suggestion: The number of samples and distribution of failure points shall be as follows:

� 1000-6000 hours at least 4 – eliminates less than 1000 hrs� 6000-10000 hours at least 4� Beyond 10000 hours at least 5 – currently only 1 required*� Total at least 18

� Continued next page16


� Regression testing times continued� For fittings the number of samples and distribution of failure points

shall be as follows:

� 1000-2000 hours at least 3� > 3000 hours at least 3� > 3000 hours at least 3

� Justification: � As the qualification testing is determined to design the wall thickness of

the tube body and not the joint, the early decades nothing add to the behavior of the tube body at long term therefore the early decades should be eliminated from the requirements of the test and propose that the regression testing to be done in the future should be done for more than 10000 hours as stated in ASTM D2992.

�17


Justification of regression time changes continued:� Early decades implies a mechanical failure mode other than those

one intended to analyze in the regression testing. Meanwhile the behavior at long term correlates more to degradation related to chemical attack and static fatigue, both of them being of interest to determine the long term design basis.determine the long term design basis.

� Comment: The stress required to fail all samples up to and exceeding 10,000 hours per ASTM D2992 time frames are at levels exceeding the elastic limitations of the pipe (incorporates degrees of mechanical failure modes in all samples not just < 1000 hours). We are likely testing damaged pipe throughout the procedure. An alternate test method incorporating a reasonable aging stress may be more appropriate.

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15HR – NOV FGS comments

� The subject of Regression testing and anomolies requires the most discussion, and likely produces long debates, FGS has similar concerns as Petroplastic and hope to arrive at some solutions in the SC15.

� Primary issues involve mixing of failure modes during regression testing, testing materials beyond the elastic regression testing, testing materials beyond the elastic limitations, and the length of time and expense to complete 10,000 hours of testing while potential inherent flaws exist in the test program.

� Move to table ASTM D2992 Regression discussions until smaller less controversial issues are discussed – Second?

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�15HR 2.1 GENERAL, reference to standards�ASTM D2992-1991 (20 years old) – update

• Revised in 1996, errors, API reverted back to 1991• D2992 Revised 2001, again in 2006

�Suggest referencing the current 2006 standard

�Suggest: Review all external references within SC 15 standards to reflect the most current standards unless there is a known conflict. Which references are not pointing to the current version?

• Volunteer , document lead to explore?20

15HR - NOV FGS comments

� 5.4 Requalification (regression testing)� 15HR Appendix A: Reference to changes:

� Glass, resin, curing agent, liner, manufacturing process * - OK� Adhesive, thread compound, sealing compound – Joint not related to pipe

regression testing - Agreement with Petroplastic (irrelevant to pipe regression)

� 5.1.1 Pipe and prime connections -� 5.1.1 Pipe and prime connections -� Initial qualification Requires “Joints” only after 6000 hours test duration *

� ASTM D2992 (1991 and 2006) –requalification� 12.1 Changes in material, manufacture process, construction, liner thickness� Require 10-200 and > 1000 hrs to reconfirm associated changes

� Attempt at one size fits all – not sufficient attent ion to detail or ext references� Neither ASTM nor API reference “ factory location ” as requirement for

“reconfirmation” � Suggest: API reference reconfirmation requirements per ASTM D2992. Additional

aspects in Appendix A may require confirmation test ing by manufacturer but require relevant comparison testing. May consider leaving this to the manufacturer as it becomes complex to standardize.

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15HR – joint related re-confirmationAppendix A5-A8

� i.e. O-rings, Joint sealant, material changes in thread compounds, reinforcement changes, adhesives, etc.

� Suggest survival testing: (2) samples containing the proposed changes for confirmation.confirmation.

� Option 1 Comprehensive (intent same as pipe): Manufacturer shall complete a regression line per ASTM D2992 At the API standard temperature or higher if so rated for each of the specific joint designs manufactured (Consider a modified version as per API 15HR 5.1.2). Complete a reconfirmation test per section 12 of ASTM D2992 for any changes proposed for this joint. Results of Joint regression will not resemble pipe regression. Joint should be re-confirmed against Joint qualification tests. For variables not related to regression behavior, Failure cannot be mandated, only survival. i.e. durometer change in elastomers, or sealant changes, etc. Surviving is all that can be required.

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15HR – joint related re-confirmation

� Alternate: Joint change re-confirmation test shall consist of: � The highest pressure rated and largest diameter for which this Joint change

is being proposed.� Test temperature shall be minimum 150F (API15HR standard) or higher

temperature if so qualified and rated by the manufacturer.� Consider joint changes acceptable If the (2) test samples can survive 100

hours at (2 x the maximum API 15HR Standard pressure rating at standard hours at (2 x the maximum API 15HR Standard pressure rating at standard temperature or higher)

� Note: multiple temperatures, pressures, and sizes may be required to confirm all potential components. i.e. A 2000psi 8” tested to 200F should qualify all diameters less than 8” and less than 200F, although does not necessarily qualify a 4” at 3000 psi.

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15HR- Appendix A.9

� A.9 Manufacturing4 - Suggestions in Blue:� Cure temperature and time schedule – A dramatic increase in cure rate

may require re-confirmation. Temperature, should be removed, ambient oven temp, internal steam, as related to mass being cured. Simply too many variables to standardize “one size for all”.

� Winding angle - +/- 5 degrees from qualified samples� Winding angle -Stacking sequence - ??, how about layer thickness > 1.2 x qualified

� Percent reinforcement in each direction - back to wind angle

� Glass transition temperature as determined in Appendix C� Tg less than qualified minimum or greater than 1.2 x qualified maximum

� Thread dimensions as specified in Section 5.3 – Joints should not be mixed with pipe regression. i.e. 6K hrs, 1000hrs.

4 - may be different for each size and rating. Translated: “probably should not be included as requiring re-confirmation, we’re tired and need a drink”.

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�5.2.2 Table 1- Minimum inside diameter�Contains an arbitrary list of inside diameters,

Addendum also contains limitations for 12 and 16”, skipping 14”... 16”, skipping 14”...

� Suggest: Maintain API published minimum inside diameters up to 12 inch = 11.75”. Specify SCH 100 ID’s as minimum for 14-24” ID. Include “larger diameter pipe are not excluded from scope”, ID’s shall be by agreement with purchaser.

� Suggest similar changes in 15LR, protect the End User from exceptionally small ID’s but not limit larger ID’s or larger pipe diameters from scope.

� Can consensus be reached on this point? Volunteer to complete the chart?

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�5.3.4 Threads and gauging practice�Gage requirements for API Round threads…

� If manufactured with API “standard threads” – The Manufacturer must have Master gages or access to them. If “AC – alternate or non standard joints” there are NO “AC – alternate or non standard joints” there are NO masters so the same cannot be a requirement.

�Suggest to follow international QA standards – API threads must be dimensioned by gauges traceable to “an international standard” this may be done by reference to gages calibrated and traceable to “API Master gages”. “Traceable to” meets ISO 9001 and API Q1 requirements.

�Agreed? Discussion? 26

15HR- NOV FGS comments

�5.1.1 OD/t limits�Currently unlimited scaling of pipe hoop stress

requires regression testing of OD/t <= 10

�Reference to OD/t, thin/thick wall theory�Reference to OD/t, thin/thick wall theory� Roark and Young 5th edition: Formulas for Stress and Strain � Shigley and Mischke: Mechanical Engineering Design 5th edition

Both references separate Thin / Thick pressure vess el theory at: OD/t = 40Other references define OD/t = 20 as boundry betwee n thick/thin wallOD/t = 10 can be found but is not commonASTM D2992 Pressure equation is identical to API eq 2. = ISO equation

Review the consequences of moving OD/t limit from 1 0 to 20:Pressure equations 1 and 2 in API 15HR, (EQ 2 corre cted with Sf added)

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15HR- NOV FGS commentscompare API Pressure equations (psi)

Ss SF ID OD t OD/t eq 1 (Pr) eq2 (Pr) Change (Pr) % diff

ASTM D2992, ISO 14692 pressure equations are identical to API 15HR eq 2

Compare result of pressure rating from eq 1 and eq 2

Ss SF ID OD t OD/t eq 1 (Pr) eq2 (Pr) Change (Pr) % diff

16000 0.67 2 2.5 0.25 10 2353 2382 29 1.23%

16000 0.67 2 2.4 0.2 12 1933 1949 16 0.83%

16000 0.67 2 2.3 0.15 15 1489 1496 7 0.49%

16000 0.67 2 2.2 0.1 22 1019 1021 2 0.23%

16000 0.67 22.096 0.048 44 502 503 0 0.05%

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�Justification: �Only Minor differences in Pressure calculation results� Standardizes methods with ASTM and ISO �Few API standard Joints (API 8rd) can withstand

Regression test pressures when a pipe of OD/t = 10 is used Regression test pressures when a pipe of OD/t = 10 is used as the base, this incorporates joint failures with pipe failures in the regression testing.

�Joints have a flatter regression slope than 55 degree pipe� Suggest Eq 2 as the single API 15HR pressure equation to simplify

and standardize, if not, replace Eq 1 “R’s” with “D’s” – I hate dividing by 2 for no reason.

� Suggest removing OD/t as a scaling limitation, if not, consider hoop stress scaling for pipe tested with OD/t <= 20

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15HR example mixing joints w/ pipeJoints and pipe, separate or foul the results by mixing

10000

Inte

rnal

Pre

ssur

e (P

SI)

component strength based on component testing

10001 10 100 1000 10000 100000 1000000

Inte

rnal

Pre

ssur

e (P

SI)

Time = (hours)30


�Burst Testing ASTM D1599�Purpose:

�A: QA tool to monitor production consistency�B: 5.1.4 - Scaling confirmation (size and pressure)�B: 5.1.4 - Scaling confirmation (size and pressure)

• R4 = Pb4 / Pr4

• R4 = ratio average failure pressure and standard pressure rating of 4 in component

• Pb4 = failure pressure of 4 in component (5.1.4)• Pr4 = 15HR standard pressure rating for 4 in component

• Pr = Pb / R4 - All components must comply to this ratio

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15HR - Burst Testing ASTM D1599

�Problems: mixing Joints with pipe�Failure time frame – 10 seconds�Suggest: Recognize alternate time frames allowed

in ASTM D1599 other than 60-70 seconds. i.e. 2-3 minutes for relative comparative testingminutes for relative comparative testing

�Suggest: When pipe/Joint transition from pipe wall to joint failure, separate the joint requirements from the Pipe body.

�Back to p. 30 graphic

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15HR example mixing joints w/ pipeJoints and pipe, separate or foul the results by mixing

10000

Inte

rnal

Pre

ssur

e (P

SI)

component strength based on component testing

10001 10 100 1000 10000 100000 1000000

Inte

rnal

Pre

ssur

e (P

SI)

Time = (hours)33

15HR – Component marking

� Appendix I.2� I.2. Marking Requirements for API Licensees� Components shall be marked with the following:� a. Manufacturer’s name or mark.� b. API monogram (and A.C. notation, if applicable).� b. API monogram (and A.C. notation, if applicable).� c. Nominal size.� d. Unique identification number.� e. Specification 15HR Standard Pressure Rating.� f. Date of manufacture.� g. API license number.

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15HR – Component marking I.2 continued

� Reference 1.1.1 This specification was formulated to provide for the availability of safe, dimensionally and functionally inter-changeable high pressure fiberglass line pipe with a Specification 15HR Standard Pressure Rating from 500 lbf/in.2 to 5000 lbf/in.2, inclusive, in 250 lbf/in.2 increments. This specification is limited to mechanical connections.

� Reference: 1.2.2 Service Conditions15HR Standard Pressure � The standard service conditions for Specification 15HR Standard Pressure

Rating are as follows:

� Service life is 20 years

� Service temperature is 150°F

� Suggest: Clearly state the MINIMUM component marking requirements in the body of the specification (single location), clearly include the API 15HR Standard Pressure rating at Standard temperature.

� Suggest: Refine the allowable pressure increments to 100psi instead of 250psi.

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15HR – wall thickness ASTM D3567

� Purpose: for Stress/pressure calculations� Requires clarification and refinement� Minimum reinforced wall thickness includes only

structural wall containing reinforcement fibers excluding resin rich interiors or exteriors either placed excluding resin rich interiors or exteriors either placed intentionally or unintentionally.

� Stress = Force/ cross sectional area� What is the minimum structural wall thickness?

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