January 2019 Vol. 1

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PPN- The Leading Source of Industry News on Polymer Pipes and Plastic Pipe Failure

Reflecting on a Year of Polymer Pipe Failures
2018 was a year of multiple failures of PP-R, PB, HDPE and PEX piping in homes, commercial buildings and hospitals.
Contact ExcelPlas Pipeline Integrity Services to Get Your Piping Assessed

Uponor Gets Massive PEX Pipe Contract

Plastics Pipe Institute Issues Advisory for Substandard Plastic Pipe Used in Oil and Gas Fields

PIPA Publishes New Industry Guidelines for HIGH STRESS CRACK RESISTANT PE100 (December 2018)


New Method for Inspection of Polyethylene Gas Pipe Defects

Crack Resistance of a Welded Butt Joint of Polyethylene Pipes

Creep Lifetime Assessment of Pressure-Tight PE100 Pipes Based on a Slow Fatigue Crack Growth

New Patent for Electrofusion of Pipes and Pipe Linings

Interpretation of EF Joint Failure (Presentation)

Calculation of the Thermal and Stress-strain States in Electrofusion Welding of Polyethylene Pipes

Fault Classification in Electrofusion Polyethylene Joints by Thermal Pulsing and IR Thermography Methods

Vinidex Offering Polywelding & Electrofusion Welding Courses

Increasing the Accuracy of Wall Thickness of Polyethylene Pipes During the Extrusion Process

Installation of Reinforced Thermoplastic Pipes (RTP) as Permanent Gas Flowlines

Structural Integrity Analysis of HDPE Pipes for Water Supplying Network

Leaks Attributed to Inherent Defects in the Polybutylene Piping System

Destructively Testing PEX Pipe and Fittings – Sharkbite vs Viega vs Uponor (Video Demonstration)

Braided Hose Failure On the Rise

Use of Flexible PVC Pipe Liners for Rehabilitation of Pipes

Lingering Fears About Plastic-lined Water Pipes Encourages City to Take the Lead on Safety Tests

Assessing Remaining Service Life of HDPE Pipelines (How Long Will My Asset Last?)
ExcelPlas has developed Protocol for Determining the Remaining Service Life of In-Service HDPE Pipelines
The 5 step protocol is based on lab testing to measure the following:
I.  The oxidative induction time (OIT) profiling to assess whether or not oxidation protection is still afforded by the additives.
II.  Measure the carbonyl index (CI) to assess extent of any polymer oxidation that has occurred.
III. Determine the critical CI at which stress cracking (SC) is initiated.
IV. Measure stress cracking resistance (SCR) to determine the time until SC is initiated.
V.  Measure the depth of micro cracking on 180 degree bent coupons by Scanning Electron Microscopy

ExcelPlas – the Australian Pipes & Fittings Testing Laboratory

  • Accredited to ISO 17025 by the National Association of Testing Authorities (NATA) Australia, and is Australia’s largest laboratory dedicated for the testing of plastic pipes and fittings to various Standards which include Australian, European and International Standards.
  • The staff employed at the laboratory have a combined experience of more than 85 years within the plastics industry specifically with manufacturing, quality control and the research and development of plastic piping systems including HDPE, PEX, PP-R, PVC, U-PVC, M-PVC, O-PVC, ABS, GRP, GRE and PB.
  • Services provided include conformance testing, compliance testing, batch release testing, root cause analysis for field failures and non-destructive testing of samples.
  • http://www.excelplas.com/

ExcelPlas Lab Specialising in HDPE Pipe Condition Monitoring, Failure Analysis and Testing
In the event of a HDPE buttweld or electrofusion weld failing during initial testing, or in service, we can conduct investigations to assist in identifying the root cause of the failure.
This service also extends to the premature failure of the pipe or fitting itself.

ExcelPlas Pipe Testing is a Leader in the Field of Polyethylene (PE) and High-Density Polyethylene (HDPE) Testing
ExcelPlas is accredited with the National Association of Testing Authorities (NATA) for butt weld tests, bend and tensile tests, peel decohesion tests on electro fusion sockets and failure mode determination

New UHMWPE Pipe for Tailing Offers Greater Than 4X the Abrasion Resistance of PE100 (Australia wide)

ExcelPlas Poly Pipe Weld Inspection Lists Top 7 Causes of Weld Failure:
• Lack of scraping
• Inaccurate scraping
• Contamination from dirt, water, oil or clays
• Lack of Paralell-ness of fusion faces
• Misalignment of surfaces
• Time, temperature and pressure deviations
• Not adhering to cool times

We have extensive experience in inspection of poly pipe welds for assuring welded joint quality.  Direct Poly Pipe Inspection ensures that operators are following the proven welding procedure; this reduces the occurrences of operational errors which lead to defects such as inclusions, lack of fusion (LoF), porosity and misalignment.
More information, contact [email protected]

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