STATUS OF
ASME CC
N-755 & N-808
Frank J Schaaf, Jr
Sterling Refrigeration
Corp
NESCC Meeting
Washington DC
18 April 2013
STATUS OF ASME
CC N-755 & N-808
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Disclaimer
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This presentation is the intellectual property
of Frank Schaaf. The comments made are
his alone, Project Manager of CC N-808, and
are not an ASME official position.
STATUS OF ASME
CC N-755 & N-808
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Presentation Elements
Reason for N-755 Separation
 Code Case Format CCN - 808
 Fusing Issue
 UT Examination Issue
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STATUS OF ASME
CC N-755 & N-808
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During approval of Revision 1 of CC N-755, negative
was received, requiring Owners to procure PE material
in accordance with Section III requirements.
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The negative could not be cleared, Individual
felt Owner’s should procure same method as Section III.
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The Chairmen of Section III and Section XI decided to
separate CC N-755 into two Code Cases.
STATUS OF ASME
CC N-755 & N-808
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First effort had N-808 detailing only the differences
between Section XI (Owner) and Section III
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Both Cases were locked, so the technical requirements were
matched and locked together.
Section XI, added UT examination based on Appendix VIII and
Callaway experience.
Approval of N-808 was taking longer and impacted N-755
revision
At the February 2013, BNCS meeting, it was decided to
remove the lock on both Code Cases, and each Section
would pursue their own Case.
ASME CC N-808
Code Case Format
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Case Layout (Based on Section III & CC N-755))
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CC Inquiry & Reply (Buried Pipe Only)
1000 General Requirements (IWA-4000, NCA and ND)
2000 Material (Technical (Mech. Properties, Fusing
Qualification and QA)
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3000 Design
4000 Installation (Section IX – Fusing)
5000 NDE (UT Examination)
6000 Pressure Test
8000 Stamping
ASME CC N-808
Code Case Format
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Case Layout (Based on Section III)
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Appendixes
• Mandatory Appendix I – Forms
Required for fabricated product off site using the fusing
process
• Non-Mandatory Appendix A – Unacceptable Fused Joints
Required to support visual examination
ASME CC N-808
Code Case Format
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Case N-755 Appendixes eliminated
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Appendixes - Mandatory
• Mandatory Appendix I Fusing – Adopted Section IX to be
published in July 2013
• Mandatory Appendix II Standards – Moved to General
Requirements
• Mandatory III Forms – Moved to Appendix I
• Mandatory IV PE Material – Moved to -2000 of Case
ASME CC N-808
Code Case Format
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Case N-755 Appendixes eliminated
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Appendixes – Non-Mandatory
• Appendix A, Training – Adopted Section IX
• Appendix B, Data Logger Review – Eliminated, may add the
Section IX, Data Logger Review sheet to -5000.
• Appendix C, Unacceptable Joints – Moved to Appendix A
• Appendix D, NONMANDATORY METHOD – Eliminated
ASME CC N-808
Fusing
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Incorporation of Section IX, FUSING (2013 ED.)
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No nuclear extras
Essential Variables
Thermal Butt fusion & Electro-fusion (future)
Fusion Procedure Specification (FPS)
Fusion Data (FPS) comes from the PE Material
Manufacturer (TR-33 (PPI) Standard Fusion Procedure
Specification)
• Has the requirements for different FPS development (PQR)
• Qualification of both Procedure and Personnel essential
variables in FPS
• Uses testing ASTM’s, Section IX has acceptance criteria
ASME CC N-808
Fusing - Experience
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Poor Material
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Fusing Problem – Major Problem
• Material will not fuse correctly
• Coupons using project material at the site and test facility
failed all tests.
• Tensile – Impact Test
• ISO Tensile Test
• DVS (German) Tensile Test
• Pipe manufacturer could not fuse the pipe and pass
tensile-impact tests (fusion box numbers)
ASME CC N-808
Fusing - Experience
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Tensile – Impact (T-I) Test
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Pipe maker felt the test was misleading yet signed
letter in TR-33 that their material passed T-I tests
Follow on testing showed that this test is a good
indicator for condition of PE material;
• Poor or defective resin
• PE product form defective
• FPS not followed
ASME CC N-808
Fusing - Experience
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PE Material
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ASTM’s don’t have acceptance criteria
NOT ALL PE 4710 RESINS ARE EQUAL
• Material Properties are very different
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NOT ALL PIPE MANUFACTURERS ARE EQUAL
• Old equipment (windows) in pipe wall
• QA program
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TR-33 Data sometimes is not repeatable
Need method to confirm material is fusible
ASME CC N-808
FUSING
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Fusing
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Callaway Relief Request, fusing process was
reviewed by the NRC as an NDE procedure
Any variable identified in an NDE procedure is an
“essential” variable
Section IX – defines essential variable as;
Essential variables - are those which will affect the
mechanical properties of the fused joint, if changed, and
require requalification of the FPS when any change exceeds
the specified limits of the values recorded in the FPS for that
variable.
.
ASME CC N-808
FUSING
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Fusing PE Material Conformation
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-2600 POLYETHYLENE MATERIAL FUSING
QUALIFICATION TESTING
• Use Project Material
• Test each corner of Fusion Box
•
•
•
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A. 60 psi – 400oF
B. 60 psi – 450oF
C. 90 psi – 400oF
D. 90 psi – 450oF
• Use Tensile-Impact Test
• Test each combination of different manufacturers product
form
ASME CC N-808
UT Examination - History
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UT Examination – Callaway Project
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Used UT examination for ease in examination of
joints versa destructive test
• Pipe is 175 lb/ft (Crane service)
• No testing machine on site
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Callaway used Time-of-Flight (TOF) tested over
200 joints (no miters)
No indications in any joint
Performed Section V, Article 14, performance
demonstration of TOF technique
ASME CC N-808
UT Examination - Incorporation
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UT Examination
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Requires UT exam on > 4 inch product form
Requires Phased-Array technique
Can examine all joints, including miters
Common technique so little training is required
All UT examiners will be trained as fusion machine
operator,
Requires Section V, Article 14, performance
demonstration of technique, intermediate rigor
ASME CC N-808
UT Examination - Incorporation
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UT Examination Acceptance Criteria
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No indication or response
No evaluation of data allowed
Detailed coupons for Section V, demonstration of
technique to ensure adequate coverage
No repairs allowed
ASME CC N-808
Future
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Approval
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Final Approval November, 2013
Owner will need CC N-808
Will seek approval from the NRC (partial)
ASME CC N-808
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THE END
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Thank you for listening
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Any Questions?????