Status of Plastic Piping

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Status of Plastic Piping
Data Collection Project

Western Regional Gas Conference (WRGC)

August 21, 2012

Background


Response to NTSB recommendation


To create a national database of in
-
service
performance of plastic piping system
components


Database administered by AGA on behalf of
PPDC


Creation and population of database was
precondition to DOT not mandating collection


2


The government
-
industry PPDC is
formed
to develop and maintain a
voluntary data collection process that
supports the analysis of the frequency
and causes of in
-
service plastic piping
material
failures


Mission

3


The PPDC will be composed of 6 stakeholders


Each stakeholder will have 2 representatives


Our purpose is to improve the knowledge
base of the industry and regulatory and
address the concerns of the NTSB


Decisions are made through consensus


Confidentiality of those submitting data


Data base access


Charter

4

Government Members


NTSB Representatives (1)


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 (1)

14 Members

Up to 3 Invited Guests

Plastic Piping Database Committee
(PPDC)

5



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 third party damages are not
collected or evaluated


The data are examined by the PPDC at each
meeting

Plastic Piping Database Committee
(PPDC)

6


Review the data, at minimum, on a semi
-
annual basis not to exceed 9 months


Jointly agree on areas of focus or concern


Issue Status Reports after each meeting


Provide resources to aid in identification of
products

Plastic Piping Database Committee
(PPDC)

7



The
reporting period is
monthly, including
reports of no failures


Reports can be faxed or sent on CD


If incomplete or insufficient data are
submitted, AGA will contact that person to
clarify or to provide adequate data so that
the data can be entered into the
PPDC
database



Data Collection Process

8


What
types of failures and/or leaks are
reportable under the PPDC initiative?




Only
report plastic piping system and
appurtenance failures and/or leaks of in
-
service pipe, fittings or joints (this includes
installation errors that fail and/or leak after
the pipe is put in service
)

Frequently Asked Questions

9


What
if I don’t have any plastic piping
system and appurtenance failures and/or
leaks during the reporting period?




Submit
a negative report for each reporting
period, stating that no plastic piping system
and appurtenance failures and/or leaks
have occurred during that reporting
period

Frequently Asked Questions

10


Do
I have to submit a separate form for each
failure and/or leak data point?




Yes
, if you use paper forms. Otherwise, you
can send AGA a report on a CD that will allow
you to consolidate your reporting by entering
multiple data points on one
form

Frequently Asked Questions

11



What
is the difference between the PPDC and
the PHMSA Mechanical Fitting Failure Report?




The
two reports are separate and independent
of each other. PHMSA is only collecting
mechanical fitting information. The PPDC is
collecting data on all plastic failures and
leaks


PHMSA’s is mandatory; PPDC is voluntary

Frequently Asked Questions

12


AGA will collect all data and keep it in a
secure database
file


Operator
-
specific
identifiers are not entered
into the
database.


Only
PPDC members or those expressly
designated by the PPDC will review the
data


The data will not be published or available in
print

Company Anonymity Protections

13


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 cap

Areas of Concern

14

Plastic Piping Database Committee’s
Plastic Pipe Timeline

15

Plastic Piping Database Committee’s
Plastic Pipe Timeline

16

Plastic Piping Database Committee’s
Plastic Pipe Timeline

17

Status of Participation


188 companies have volunteered to
participate (160 in 2000; 165 in 2007)


107 companies actively submitting data in May
2012


Percent of all installed plastic piping in the
U.S.


66% for plastic main (76% in 2008)


73% for plastic services (84% in 2008)



18

Commitment

Those who volunteered to participate committed
to regularly reporting to the AGA by submitting
either:


Data, or


Negative reports (no data to submit)

As of March 2010 a list of active participants is
published as an appendix to the Status Report



Anonymity is still protected


19

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

20

Accuracy and Completeness of Data

VERY IMPORTANT

Manufacturer document available on AGA
website


Capture the historical plastic materials
manufacturer information


Designed to be an aid when completing
failure reports in order to get more accurate
information

21

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

Comments

Allied

PE 3306/3406

1965/66

1972/73

1/2" CTS
-

2" IPS

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







22

Company

Material
Designation

From

To

Size Range

Comments

Georg Fischer Central
Plastics









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













Manufacturers Database

Manufacturers of Plastic Piping Products


Line Fittings

NOTE: Operators are required to install materials that meet current requirements

23

NOTE: Operators are required to install materials that meet current requirements

Company

Material
Designation

From

To

Size Range

Comments

AMP

Dupont Zytel
ST
-
801







1970's, stainless steel and nylon
compression fitting. Technology
purchased by Metcal in 1990; can be
white in appearance. Dupont Zytel ST
-
801



Nylon

??

??

1/2" CTS
-

2" IPS

Black with Stainless Steel compression
ring. Nylon 66













Georg
Fischer
Central
Plastics









Electrofusion and heat fusion fittings,
transition fittings, meter risers.

Manufacturers Database

Manufacturers of Plastic Piping Products


Other Fittings

24

Company

Material
Designation

From

To

Size Range

Comments

Georg Fisher
Central Plastics























Dresser

Nylon

1991

Present

1/2" CTS
-

1
-
1/4" CTS

Style 475 Curb Valve Rilsan













Friatec

PE 3408

1985

1995

2"
-

6" IPS

Black body with white operating
nut; ball valve

Manufacturers Database

Manufacturers of Plastic Piping Products


Valves

NOTE: Operators are required to install materials that meet current requirements

25

Manufacturers Database

26

The database


Contains 11+ years of collected data


100% of two
-
5 year leak survey cycles


Reinforces what is historically known of the
failure data points


Summarizes areas of concern in the Status
Report (available on the AGA website)

Summary of Database

27

ABS

PHMSA 2010 Annual Report Data: 1,296 Miles ABS Main

56.76%

10.81%

21.62%

10.81%

Fittings
Joints
Pipe
Not Recorded
28

Failure/Leak Cause
% of
Total ABS
Failures
Excessive
Expansion/Contraction
2.70%
Excessive External Earth
Loading
5.41%
Installation Error
13.51%
Squeeze Off
2.70%
Unknown
51.35%
Other
2.70%
Cap
13.51%
Not Recorded
5.41%
Material Defect
2.70%
Total
100.00%
ABS Causes

29

PHMSA 2010 Annual Report Data: 12,660 Miles PVC Main

76.86%

13.54%

9.39%

0.22%

Fittings
Joints
Pipe
Not Recorded
PVC

30

Failure/Leak Cause

% of Total
PVC
Failures

Excessive Expansion/Contraction

4.37%

Excessive External Earth Loading

17.90%

Installation Error

13.54%

Squeeze Off

0.66%

Point Loading

5.68%

Previous Impact

0.44%

Unknown

15.72%

Other

5.24%

Cap

0.66%

Not Recorded

1.09%

Material Defect

34.72%





Total

100.00%

PVC Causes

31

PE

PHMSA 2010 Annual Report Data: 604,981 Miles PE Main

54.04%

11.67%

32.83%

1.46%

Fittings
Joints
Pipe
32

Failure/Leak Cause

% of Total
PE Failures

Excessive Expansion/Contraction

0.54%

Excessive External Earth Loading

10.56%

Installation Error

25.60%

Squeeze Off

1.98%

Point Loading

6.63%

Previous Impact

0.25%

Unknown

16.58%

Other

24.14%

Cap

7.87%

Not Recorded

1.68%

Material Defect

3.72%

Gopher/rodent/worm damage

0.44%





Total

100.00%

PE Causes

33

Aldyl A

PHMSA 2010 Annual Report Data does not
separate Aldyl A from other PE types

48.75%

9.68%

40.17%

1.40%

Fittings
Joints
Pipe
Not Recorded
34

Failure/Leak Cause

% of Total
Failures

Excessive
Expansion/Contraction

0.44%

Excessive External Earth
Loading

13.74%

Installation Error

26.66%

Squeeze Off

2.13%

Point Loading

7.69%

Previous Impact

0.12%

Unknown

12.11%

Other

31.82%

Cap

1.75%

Not Recorded

0.61%

Material Defect

2.86%

Gopher/rodent/worm damage

0.07%





Total

100.00%

Aldyl A Causes

35

For more information, consult AGA’s website at
Operations & Engineering/

Plastic Piping Data Collection Initiative

http://www.aga.org/Kc/OperationsEngineering
/ppdc/Pages/default.aspx

Contact:

Kate Miller at (202) 824
-
7342






or





kmiller@aga.org



Participation

36

Regulatory Perspective


Enhance safety…..


Issuance of advisory bulletins


Aid the operator and regulatory agencies in
making risk based decisions based on data
collected



37

Thank you for your support of the Plastic
Pipe Database Initiative


Questions?


38