Double Wall Pipe

A double-walled pipe is a secondary contained piping system. It is a pipe within a pipe, or encased in an outer covering, with an annulus (interstitial space) between the two diameters. The inner pipe is the primary or carrier pipe and the outer pipe is called the secondary or containment pipe. The great majority of double-walled piping applications involve wastewater, groundwater, and process safety.

Photo of our Double Wall Pipe:

Structure: Outside steel carbon pipe, inside casting liner, between them there is unshrinkable concrete

It is used in Trailing Suction Hopper Dredger, Effective resistance to the wear and tear of pipe fittings during transportation of sediment and other material.

A. General

High-demanding welded and high strength Structural Steel Pipe with structure parts can be used for special Dredger parts., used in different position, mainly on deck. 

We are proud of our produce line, equipment and skilled workers, we are able to manufacture steel structure and structural Steel Pipe pipes as per client's requirements.

B. Construction and procedure

The construction is to be built according to the drawing with rules of good workmanship.

Pipe with different length, angle, diameter, and with or without flanges.

C. Materials

All fabricated steelwork used in the construction of the dredger Structural Pipes will be to manufacturing standard of normal or classification society.

All materials proposed will be selected to comply with the latest Health and Safety Rules.

Paint systems for hull protection will be of the highest quality (Hempel, Inter, Sigma, Jotun)

D. Welding

All welding will be performed in accordance with drawing and order and UniSite experience and all welding will be continuous and full penetration.

E. Workmanship

The workmanship have good marine practice. Care are taken to ensure fair lines, smooth surfaces and neat welding.

F. Main particulars