TPi October 2008

developments products & Service pipeline rehabilitation

the surface of the pipe ends, pipes and fittings can be welded together to produce a homogeneous, high- strength joint. The electrofusion method applied within this area conforms to the guidelines of Deutsche Verband für Schweißen und verwandte Verfahren eV (German Association of Welding and Associated Processes), ensuring high quality results. Using Simofuse, operators can install leak-proof pipelines in a single material used consistently throughout the system. Advantages provided by Simofuse include a permanently tight and perfectly flush-fitting welded pipe connection without interfering socket structures; ready-to-install, meaning no welding preparation on-site; uncomplicated connection of service pipes to PE sewer pipes and a standardised transition to the rigid PVC sewer pipes; and a permanently corrosion-resistant and abrasion- resistant plastic pipe system, capable of bearing a sustained static load.

During the course of a reconstruction project in Idar-Oberstein, Germany a concrete waste water pipe was repaired using the partial open-trench method. As is was not possible to repair the sewer by means of pure reconstruction and relaying, Simona AG was asked for a special solution to avoid any damage to the nearby 16 bar main water supply line. The company’s new Simofuse ® brand uses the latest joining technology for plastic piping systems.

With the help of specially designed electrofusion spirals integrated within

Simofuse schematic diagram S S

In the above application, Simofuse PE 100 pipe modules with integral electrofusion joints were welded together and inserted into the old pipe, without interfering socket structures. The old concrete pipe was broken open in the connection areas beforehand, to enable subsequent installation of Simofuse PE 80 external saddles for the connection of service pipes to the previously fed-in PE 100 pipeline using clamping tools. With the help of integral electrofusion joints, the external saddles were welded to the pipeline to produce a perfectly tight, flush-fitting connection in accordance with the German DVS guideline. Precise connection boreholes in the PE 100 main sewer enabled the connection of the existing PVC and vitrified clay service pipe feeds through an extended pipe connection using push-fit sockets. The welded pipe system guarantees permanent tightness and functionality. PE 80 is available in diameters from 225 to 560mm (630 to 1,000mm upon request).

The Simofuse PE external saddle has an S S adjustable design, allowing connection to standard, large format and ovoid pipes

Seamless and LSAW manufacturing Established in 1994, Shanghai Yueyuechao Steel Tube Group mainly deals in seamless steel pipe, seamless square/rectangle steel pipe, and large OD longitudinally submerged arc welded (LSAW) manufacture.

The specification for the company’s LSAW pipe is Ø356-1,422 x 12-60mm, to quality standards API/ASTM/GB/ISO/DNV/JIS.

Cold drawn seamless steel tube for Jiangyin Yueyuechao Manufacture Tube Co, Ltd ranges from Ø6-426 x 1-20mm, while hot expanded tube specifications range from Ø168-630 x 4-30mm. The range of products includes seamless steel tubes for construction, fluid conveyance, high/medium/low pressure boilers, petroleum cracking, high- pressure fertiliser equipment and dew point anti-erosion steel tubes, high carbon and chrome bearing steel tubes, cold drawn or cold-rolled precision steel tubes, square/rectangle seamless steel tubes and various alloy steel tubes, including API, ASTM, DIN and EN standard series. Yueyuechao has already become an important steel pipe supplier in China and abroad, with pipes being exported to countries including USA, Germany, Canada, Spain, New Zealand and Korea.

Shanghai Yueyuechao Steel Tube Group – China yycit@yyc88.cn • www.yyc88.com

Simona provides Simofuse pipe modules (PE 80/PE 100) in diameters

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Tube Products International October 2008

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