Post Tensioning Duct Machine, Corrugated Tube Machine
Spiral Tube-former for Production Post-Tensioning Duct or Corrugated Tube
Our Spiral Corrugated Post-Tensioning Tube Making Machine is
special for production round corrugated ducts adopted in
expressway, bridge, train and large-span post-tension concrete
projects. The prestressed Protection Tube production Machine is
suitable for both indoor and site work because of its light weight
and small sizes. With its special corrugations, a very high radial
stiffness well adapted for use as former in concrete structures.
Corrugated tube is also being used as culverts and forms for
concrete projects, plinths and columns. On many construction
projects like apartment buildings, parking garages, office
buildings, industrial buildings, bridges and docks, schools and
hospitals, the introduction of the prestressed protection tubes
will make it possible to use very long spans. The reduction in
weight allows large areas and fewer columns which in turn will give
technical economical and esthetic advantage.
Our high engineer designed this machine and special for exporting
post tension ducts, this kind PT ducts is same as the ducts
manufactured by SPIRO tube-former’s, with 78mm width raw material,
only our machine will be smaller. The present Post tensioning ducts
adopted in Chinese market, its character is different with this
style ducts, will be more flexible, and can not be used in certain
countries because of the different post tensioning ducts standard.
Spiral round Corrugated Post-tensioning tube-former main dates
| ITEM | CONTENT |
| Machine type: | JVPTF-300 |
| Suitable Material: | cold rolled steel and of hot dipped galvanized steel |
| Strip Width: | 78mm |
| Strip Thickness: | 0.3~0.4mm (standard size 3.5mm) |
| Pitch of Spiral: | 65mm |
| Swage Type: | Double-lock |
| Tube diameter range: | Diameter 50mm----diameter 104mm Diameter 104mm----diameter 300mm |
| Mould: | One size mould for one size tube |
| Strip feeding speed: | 0-30 m/min |
| Motor Power: | 380V, 3phase, 50Hz (others optional) |
| Total power: | 5.5kw |
Further details about flat post tensioning ducts, Pls contact with us!
POST TESIONING Duct INDUSTRY Brief introduction
Post-tensioning is a method of reinforcing (strengthening) concrete
or other materials with high-strength steel strands or bars,
typically referred to as tendons.
These internal forces are applied by tensioning high-strength
steel, which can be done either before or after the concrete is
placed. ... Post-tensioning is done onsite by installing
post-tensioning tendons within the concrete form-work in a manner
similar to installing rebar.
Several advantages are there for post-tensioned slabs. As post
tensioning reduces or nearly eliminates shrinkage cracking, hence
fewer or no joints are required. Cracks developed are tightly held
together by means of tensioned tendons. The postensioned slabs are
suitable for the expansive soil conditions.
Advantages of Prestressed Concrete:
Prestressed concrete members are free from cracks and the
resistance to the effect of impact, shock, and stresses are higher
than rcc structures. Longevity of prestressed structure is greater
than rcc structure because the reinforcement stays unaffected from
outer agencies.
