What s New with Plastic Piping

Transcription

1 What s New with Plastic Piping

2 PPDC Information Identifies pipe and fittings used in plastic piping systems Explains historically known plastic piping issues Identified trends assists with DIMP implementation and planning 2

3 Background Response to NTSB recommendation and database was a precondition to DOT not mandating collection A national database of in-service performance of plastic piping system components Database administered by AGA on behalf of PPDC 3

4 Plastic Piping Database Committee (PPDC) 12 Members Government Members NAPSR Representatives (2) NARUC Representatives (2) PHMSA/OPS Representatives (2) Industry Members AGA Member Representatives (2) APGA Member Representatives (2) PPI Member Representatives (2) AGA Observer (2) Up to 3 Invited Guests and 1 NTSB Liaison 4

5 Plastic Piping Database Committee (PPDC) The scope of the committee has been expanded to include failures and/or leaks of metal or plastic appurtenances contained within plastic piping systems. Immediate, clearly known, third party damages are not collected or evaluated. 5

6 Plastic Piping Database Committee (PPDC) Reviews the data, at minimum, on a semiannual basis not to exceed 9 months* Jointly agrees on areas of focus or concern Issues Status Reports after each meeting Provides resources to aid in identification of products and to assist operators with DIMP * The PPDC currently meets 3 times per year. 6

7 Status of Participation 108 companies actively submitted data in March 2014 PPDC submitters represent these percentages of all installed plastic piping in the U.S. 73% plastic main 81% plastic services 7

8 Accuracy and Completeness of Data VERY IMPORTANT Impacts the analysis and conclusions by PPDC Needs full cooperation of participants to help resolve submitted data issues Increasingly important with Distribution Integrity Management 8

9 Manufacturers Database Manufacturers of Plastic Piping Products - Pipe NOTE: Operators are required to install materials that meet current requirements Company Material Designation From To Size Range Allied PE 3306/ / /73 1/2" CTS - 2" IPS Comments Was also a resin producer and supplied the AC ultra high molecular pipe compound to several small pipe extruders including Yardley, Orangeburg, Endot and the Barrett Division of Allied (also an extruder of PVC pipe). Except for Endot, most of these producers/extruders have since gone out of business or have different names today. Pipe was very difficult to fuse. Amstan PE3306 Mid-late 1960s 9

10 Manufacturers Database Manufacturers of Plastic Piping Products - Line Fittings NOTE: Operators are required to install materials that meet current requirements Material Company Georg Fischer Central Plastics Designation From To Size Range Comments Produced molded fittings for pipe producers PE 2406?? Present 1" IPS - 12" IPS Solid Yellow PE 3408?? Present 1" IPS - 12" IPS Solid Black CP Chemical Another name for Performance Pipe 10

11 Manufacturers Database Manufacturers of Plastic Piping Products - Other fittings NOTE: Operators are required to install materials that meet current requirements Company AMP Material Designation From To Size Range Comments Dupont Zytel ST-801 Nylon???? 1/2" CTS - 2" IPS 1970's, stainless steel and nylon compression fitting. Technology purchased by Metcal in 1990; can be white in appearance. Dupont Zytel ST- 801 Black with Stainless Steel compression ring. Nylon 66 Georg Fischer Central Plastics Electrofusion and heat fusion fittings, transition fittings, meter risers. 11

12 Manufacturers Database Manufacturers of Plastic Piping Products - Valves NOTE: Operators are required to install materials that meet current requirements Company Georg Fisher Central Plastics Material Designation From To Size Range Comments Dresser Nylon 1991 Present 1/2" CTS - 1-1/4" CTS Style 475 Curb Valve Rilsan Friatec PE " - 6" IPS Black body with white operating nut; ball valve 12

13 Summary of Database The database Contains 13+ years of collected data Over 35,600 data reports More than two-5 year leak survey cycles Status Report includes analysis of specific data Failures/Leaks on newly installed pipe ABS, PVC and PE leaks by component and cause DuPont & Uponor Century 3306 AMP 13

14 Failure Causes for Pipe, Fittings and Joints 14

15 ABS Failures by Location PHMSA 2012 Annual Report Data: 3791 Miles of ABS Main PPDC active submitters have 266 Miles of ABS Main PHMSA annual report data downloaded 2/10/14 15

16 ABS Failure Causes % of Total Cause Failures/Leaks Excessive Expansion/Contraction 2.50% Excessive External Earth Loading 5.00% Installation Error 15.00% Squeeze Off 2.50% Point Loading 0.00% Previous Impact 0.00% Unknown 52.50% Other 2.50% Cap 12.50% Not Recorded 5.00% Material Defect 2.50% Gopher/rodent/worm damage 0.00% Unknown - Not Excavated, Replaced 0.00% Unknown - Abandoned 0.00% Corrosion 0.00% Total % 16

17 PVC Failures by Location PHMSA 2012 Annual Report Data: 12,241 Miles of PVC Main PPDC active submitters have 4,085 Miles of PVC Main PHMSA annual report data downloaded 2/10/14 17

18 PVC Failure Causes % of Total Cause Failures/Leaks Excessive Expansion/Contraction 3.26% Excessive External Earth Loading 14.57% Installation Error 25.76% Squeeze Off 0.33% Point Loading 3.59% Previous Impact 0.43% Unknown 8.37% Other 4.13% Cap 0.43% Not Recorded 7.72% Material Defect 31.20% Gopher/rodent/worm damage 0.00% Unknown - Not Excavated, Replaced 0.00% Unknown - Abandoned 0.00% Corrosion 0.22% Total % 18

19 PE Including DuPont & Uponor, Aldyl A PHMSA 2012 Annual Report Data: Miles of PE Main PPDC active submitters have 482,344 Miles of PE Main 19

20 PE Including DuPont & Uponor, Aldyl A, Causes % of PE Less DuPont & Uponor Failures/ Leaks % of PE Less Century, Dupont & Uponor Failures/Leaks % of All PE Cause Failures/Leaks Excessive Expansion/Contraction 0.47% 0.57% 0.57% Excessive External Earth Loading 8.02% 3.66% 3.68% Installation Error 26.81% 26.46% 26.51% Squeeze Off 1.86% 1.39% 1.40% Point Loading 7.00% 4.17% 4.18% Previous Impact 1.73% 2.85% 2.86% Unknown 12.99% 17.53% 17.60% Other 19.57% 10.72% 10.68% Cap 7.88% 13.01% 13.09% Not Recorded 2.89% 4.44% 4.45% Material Defect 8.19% 13.32% 13.08% Gopher/rodent/worm damage 0.44% 0.89% 0.89% Unknown - Not Excavated, Replaced 0.69% 0.73% 0.73% Unknown - Abandoned 0.10% 0.12% 0.12% Corrosion 1.37% 0.16% 0.16% Total % % % 20

21 DuPont & Uponor, Aldyl A DuPont and Uponor, Aldyl A, piping is not identified as separate from other types of polyethylene in the PHMSA Annual Report information. However, the PPDC includes DuPont and Uponor as manufacturers Aldyl A is more than 50% of the database. 21

22 DuPont & Uponor, Aldyl A, Causes % of Total DuPont & Uponor Failures/ Leaks % of Total DuPont & Uponor Pipe Failures/ Leaks % of Total DuPont & Uponor Fitting Failures/ Leaks % of Total DuPont & Uponor Joint Failures/ Leaks Cause Excessive Expansion/Contraction 0.4% 0.6% 0.2% 1.0% Excessive External Earth Loading 10.7% 17.3% 6.5% 9.8% Installation Error 25.5% 14.3% 25.6% 64.6% Squeeze Off 2.1% 5.6% 0.0% 0.1% Point Loading 8.8% 19.9% 1.4% 6.5% Previous Impact 0.8% 2.1% 0.1% 0.1% Unknown 9.4% 8.7% 9.0% 11.5% Other 24.9% 22.4% 30.1% 1.1% Cap 5.3% 0.0% 10.8% 0.0% Not Recorded 1.6% 2.0% 1.2% 2.5% Material Defect 7.5% 3.0% 12.3% 2.6% Gopher/rodent/worm damage 0.1% 0.2% 0.0% 0.0% Unknown - Not Excavated, Replaced 0.6% 1.6% 0.1% 0.2% Unknown - Abandoned 0.1% 0.2% 0.0% 0.0% Corrosion 2.1% 2.1% 2.8% 0.0% Total 100.0% 100.0% 100.0% 100.0% 22

23 DuPont & Uponor, Aldyl A, Failures by Year in Service 23

24 Century Failures 24

25 Century Failures by Cause % of Total Century Failures/Leaks % of Century Pipe Failures/ Leaks % of Century Fitting Failures/Leaks % of Century Joint Failures/Leaks Cause Excessive Expansion/Contraction 0.0% 0.0% 0.0% 0.0% Excessive External Earth Loading 0.5% 0.8% 0.0% 0.0% Installation Error 20.6% 10.7% 28.1% 46.2% Squeeze Off 0.0% 0.0% 0.0% 0.0% Point Loading 1.4% 2.5% 0.0% 0.0% Previous Impact 0.5% 0.8% 0.0% 0.0% Unknown 6.1% 5.8% 7.8% 0.0% Other 19.6% 28.1% 6.3% 15.4% Cap 0.9% 0.0% 3.1% 0.0% Not Recorded 0.9% 0.0% 3.1% 0.0% Material Defect 49.5% 51.2% 51.6% 38.5% Gopher/rodent/worm damage 0.0% 0.0% 0.0% 0.0% Unknown - Not Excavated, Replaced 0.0% 0.0% 0.0% 0.0% Unknown - Abandoned 0.0% 0.0% 0.0% 0.0% Corrosion 0.0% 0.0% 0.0% 0.0% Total 100.0% 100.0% 100.0% 100.0% 25

26 Examples of Questions Received by PPDC Question from PHMSA: Do socket fusion failures appear in the database? Response from PPDC: Yes, socket fusions are a type of joint. 3% of all failures are socket fusions and of those 60% are known to be ½ to 1 CTS size. Question from the PMC PPDC Feedback Task Group: Is there a way to generally say how much PE is Aldyl A? Response from the PPDC: Aldyl represents approximately 62% of the PE reports in the database. The definition of Aldyl used for PPDC data analysis is the data reported as being manufactured by DuPont and Uponor. For additional information about Aldyl, see Appendix D. 26

27 What does this data mean to you? requires that an operator must demonstrate an understanding of its gas distribution system developed from reasonably available information PPDC Status Report includes analysis of specific, nationwide, data Failures/Leaks on newly installed pipe ABS, PVC and PE leaks by component and cause DuPont & Uponor Century AMP 3306 Manufacturers Database Plastic Piping Timeline 27

28 What does this data mean to you? requires that an operator must consider reasonably available information to identify existing and potential threats. 5 historically known areas of concern are reflected in the PPDC database: Century Utility Products polyethylene (PE) pipe produced from 1970 through 1974 DuPont Aldyl A low ductile inner wall PE pipe manufactured from 1970 through 1972 PE pipe manufactured from PE 3306 resin such as Swanson, Orangeburg and Yardley DuPont Aldyl service punch tee with a white Delrin polyacetal threaded insert Plexco service tee with Celcon polyacetal threaded cap 28

29 What does this data mean to you? For accelerated replacement programs of vintage plastic piping PPDC Status Report includes analysis of specific data ABS, PVC and PE leaks by component and cause DuPont & Uponor Century PE 3306 AMP fittings 29

30 How might States use the info? States might use the list of active submitters to see which companies in their state are or are not participating States might use the PPDC analysis publicly available to inquire whether those issues are relevant to a certain operator, and if so, what is being done about it in the context of DIMP Responses to questions may also aid in determining what issues to expect 30

31 For more information, consult AGA s website at Operations & Engineering/ Plastic Piping Data Collection Initiative /ppdc/pages/default.aspx Contact: Kate Miller at (202) or kmiller@aga.org 31

32 Questions? Thank you for your support of the Plastic Pipe Database Initiative 32