Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


Clad pipes - Weld Overlay Clad Pipe -Equal to all challenges

Clad pipes – Weld Overlay Clad Pipe -Equal to all challenges
longtaidihas been processing clad materials into pipes and piping components for more than 25 years. By using clad materials, the excellent strength and toughness of carbon-manganese steels are combined with the corrosion resistance of high-alloyed materials. The use of clad pipes is recommended in all areas where dynamic stress, high pressure and a high level of corrosiveness can be found in the media transported.
We are the only pipe manufacturer in the world that produces
Weld Overlay Clad Pipe
 LONGTAIDI the world’s largest CRA weld overlay pipe manufacturer, we have substantial cladding capacity.
cland pipe
At our china facility alone we have 19 twin head and 35 hex / quad* head overlay machines suited to pipe diameters from 6” to 60” and beyond, all able to handle 12m random lengths. We also have the ability maunfacture weld overlay pipe in our Brazil facility and will soon also be producing in Saudi. Our weld overlay capability also extends to small diameters based on cladding shorter pipe lengths.
Mechanically lined pipes – the longtaidi® pipe
At the beginning of the nineties we developed the mechanically lined BUTTING-Bimetal-pipe, short: longtaidi® pipe.
The longtaidi® pipe is a corrosion resistant pipe which is telescopically aligned inside a pipe in carbon-manganese material and the tight mechanical bond between the pipes is achieved in a hydroforming facility.
For many years the longtaidi® pipes have been successfully used in very demanding and sensitive onshore and offshore areas of the oil and gas industry. They are used as pipelines, riser pipes and SCR-pipes for highly corrosive media.
Technical details at a glance:
Size range from OD 114,3 mm (4") up to 660 mm (26")
Random lengths up to 24 m (up to 12 m without circumferential weld)
Production acc. to API, ASTM, DNV or ISO
Suitable for S-Lay, J-Lay method, bundle or reel-lay process
Once clad, our pipes (as required) undergo full hydrostatic testing to prove product integrity. Our test facility is capable to handle pressures up to 1400Bar (20,000 psi). Cladtek CRA pipe is also extensively Non Destructively Examined. This can include EC, UT, RT, dye penetrant testing, and visual and laser scanning. Much of our inspection is automated using innovative technologies to enhance reliability and optimise performance.
Advantages of mechanically lined pipes:
Cost savings of up to 40 % compared to solid pipes
High corrosion resistance at the inside and high pressure resistance at the outside
Project-specific material combinations
longtaidi– Progress by Tradition

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