ExcelPlas Receives Full NATA Accreditation for its Pipe Testing Labs ExcelPlas Pty Ltd, a leading Australian Polyethylene Welding Testing Organisation and ISO Weld Testing Facility in Dalby (Queensland), has officially received full NATA Accreditation for tensile testing of butt fusion and electrofusion polyethylene welded joints.
The Australian Pipeline Industry Association (APIA) and its Coal Seam Gathering (CSG) code of practice now require destructive testing to be carried out on a number of welds cut out of existing pipelines prior to commissioning as an industry best practice. With the increasing use of polyethylene piping in infrastructure and construction, testing of welds has seen a corresponding rise over the last few years making NATA accreditation more important than ever for quality assurance. The integrity of piping welds is critical as welded joints are considered the weak points of a pipeline.
The National Association of Testing Authorities (NATA) accreditation officially approves ExcelPlas for conducting tensile tests of polyethylene welded product according to ISO 13953 and Peel Decohesion Tests on pipe and related products including electrofusion pipe fittings to ISO 13954. This recognition combined with 8 dedicated pipe testing stations makes Excelplas the leader of a very select group of internationally recognised laboratories in Australia eligible to offer these testing services.
The NATA recognition also ensures that the mechanical testing of polyethylene welded joints performed by ExcelPlas laboratories meet a very stringent and demanding set of test protocols. The NATA accreditation also assures clients that Excelplas test methods and procedures meet the exacting requirements of the International Standards Organisation (ISO) and as well as those of the Australian and New Zealand Standards (AS/NZ).
ExcelPlas Expands Pipe Testing Laboratory in Dalby ExcelPlas Dalby boasting 8 testing stations is now the Largest Poly Pipe Testing Lab in Australia The new facility has multiple CNC machines for sample preparation as well as a dedicated NDT lab
Standard DVS 2207-1 covers electrofusion, Butt Fusion and Socket Fusion welding Specific statements and requirements in relation to quality and training: – The quality of the welded joints depends on the qualification of the welder – The welding work must be monitored – Every welder has to be trained and has to be in possession of a valid qualification certificate – The welding zone must be protected from bad weather influences – Couplings not to be used if coils are oval and bent
Technical Program Announced for Plastic Pipes 17th World Conference (22-24 September 2014) Selected Papers:
• Analysing the Performance of Electrofusion Tapping Tees When Subject to Contamination
• Essential Variables of Heat Fusion Joining of Polyethylene Pipe
• Non Destructive Evaluation of Improper Fusion for Polyethylene Heat Fusion Socket Joint
• Butt Fusion of Large Diameter Pipe
• Butt Welding of Big Pipe
* Moisture Presence:
– While adequate scraping is commonly stressed, the presence of moisture in the welding zone is rapidly being recognised as a leading cause of EF Weld failure.
– Colder weather usually accompanied by rainy days raises the risk of water presence greatly.
– While the greatest risk is actually from the alcohol used to clean the surfaces after scraping, this takes a good while to totally evaporate in cooler temperatures.
– Water or alcohol becomes a gas and expands at higher temperatures if entrapped within the electrofusion welding zone, both the moisture and escaping steam or gas usually prevent successful fusion.* Suggestions & Tips:
– Be observant for the presence of moisture on the surfaces to be welded, ensure your spigots are completely dry prior to scraping and check there is no condensation within the sealed bag containing the EF fitting.
– On application of the alcohol wipes ensure all trace of alcohol has evaporated before assembly the joint.
– It is not necessary to clean the EF Fitting with alcohol wipes if it is clean and the packaging is unbroken, simply remove the fitting from its bag and assemble immediately without contacting the inside of the fitting or the pipe spigots with your fingers.
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