TPi March 2015

Fi t t ings

Plastic pipe coupling Teekay Couplings has launched the Plastlock Pipe Coupling. Enabling simple, rapid and permanent joining of plain-ended plastic pipes, the product will increase the ability of engineers to specify plastic pipes in projects.

testing and commissioning. If cure times are not closely observed, leaks at the joints can start to appear prematurely. Hot working and fumes created by gluing also present risks. Plastlock is designed to work with a wide range of plastics used in piping, including polyethylene, polybutylene, polypropylene, PVC-C, PVC-U and ABS. The range includes 15 different sized couplings, to fit pipes with outside diameters from 25 to 315mm. Couplings to fit plastic pipes outside of the standard range can be manufactured to order. Plastlock is engineered to conform to WIS-4-24-01 and BS 851: 2103 standards, and minimum burst is four times working pressure.

around the area where each anchor ring engages with it. These features allow for a dynamic lock on the pipe, ensuring all rings are continuously in contact with the pipe wall, resulting in a hold that permanently locks the two pipes together. “By simply butting two plastic pipes together and connecting them with a Teekay Plastlock Pipe Coupling, engineers can create a permanent coupling in an extremely short period of time and with a structure that is often stronger than the plastic pipes it’s connecting,” said Ian Webb, director at Teekay Couplings. “This should be seen as a significant new product. Plastic pipes have a multitude of potential applications in engineering.” With other methods of plastic pipe joining, heat fusion or gluing, the cure time prolongs installation and delays

Key to the new product’s capability is its patented dynamic axial restraint system, which locks plastic pipes together without the need for gluing, heat fusing, flanging or pipe inserts. The system has two pipe wall gripping rings that adapt to higher levels of load as pressure in coupled pipes increases. These rings rotate on the pipe surface under higher loads, increasing the area gripping the pipe and reinforcing the seal. This design concept follows through into the pipe anchoring mechanism, which includes three anchor rings at staggered heights. A chamber between each ring allows the pipe wall to migrate Alloy steel fittings supplied for chemical plant Interservice Trading BV completed a substantial part of the Aquarius project for Shell Chemical Plant at Moerdijk, Netherlands, towards the end of 2014. The supply consisted of seamless BW fittings in alloy steel ASTM A 234 WP22, with mostly heavy wall thickness SCH 160. It also involved all of the extra testing required by the client. All items were supplied ex IST-stock. IST states that it is well known for its stock of special BW fittings, all from approved PED manufacturers in the EU. Interservice Trading BV – Netherlands info@istbv.com www.istbv.com

Teekay Couplings Ltd – UK info@teekaycouplings.com www.teekaycouplings.com

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March 2015 Tube Products International