Pipes & ducts are manufactured using the "dual helix" filament winding process on computer controlled machines. By adjusting the relative speed of mandrel rotation and glass distribution head movement, helical reinforced layers with different angles can be wound. In order to increase the pipe stiffness, especially on large diameter pipes, silica sand can be added to parallel layers of wall.
Nominal diameter
Nominal size of pipe and fitting is based on internal diameter. The range of available sizes is 25 to 3000 mm.
Nominal pressure classes:
Pipes and fittings are classified according to nominal pressure. Standard pressure classes are 4, 6, 10, 16, 20 and 25 bars. Intermediate or higher-pressure classes are considered on request or depending on the design parameters and conditions
Nominal lengths
Pipes have a length of six meters up to nd150 and 12 meters for bigger diameters.
Fittings
A wide range of fittings as elbows, reducers, tees, caps, flanges etc. Is available.
Fittings are manufactured by the hand lay-up, contact molding and spray-up process. In hand lay-up and contact molding processes veil and alternate layers of mat and woven roving saturated with resin are applied on the mold. In spray-up process continuous strand roving is fed through a chopper gun, combined with catalyzed resin, and sprayed onto the mould surface
Prefabrication spools
Prefabricated spools save installation time as well as costs, freeing the designer from being limited to standard fittings and allowing junction sizes shapes to be specified and manufactured as a better alternative to a complex series of joints.
LANDYOUNG GRP jacking pipes is manufactured in accordance with international standard using Helical FILAMENT winding process and Continuous FILAMENT winding process on computer controlled machines.
DESCRIPTIONS
LANDYOUNG GRP jacking pipes is manufactured in accordance with international standard using Helical FILAMENT winding process and Continuous FILAMENT winding process on computer controlled machines.
GRP jacking pipe is designed to meet the exacting demands of pipeline construction and rehabilitation using trenchless micro-tunnelling and pipe-relining methods.
Applications
LANDYOUNG GRP jacking pipe is suitable for use in pressure, non-pressure and trenchless applications for potable, non-potable, industrial, drainage and wastewater systems.
Water
Sewage & wastewater
Pipe-relining
Road & rail culverts
Asset encasement (e.g. protection for pressure pipelines)
Ducts
Advantages
The GRP Jacking pipe has been engineered to deliver a range of features and benefits that make it suitable for the applications above, including:
Superior axial compressive strength
Excellent hydraulic performance
Light weight and corrosion resistant
Corrosion resistance
Smaller tunnel diameter and reduced spoil volume
Lower jacking forces required during installation
Smaller entry/exit pits
Longer drive lengths
Faster construction time and lower installation costs
Reduced environmental disturbance and social cost
Product Range and properties
Diameters: DN300 DN4000
According to the shape of media, FRP vessels can be divided into three categories of liquid, gas, solid tank; according to the pressure grade, can be divided into two categories of ATM tank and pressure tank; According to shape of vessel, can be divided into three categories of horizontal cylinder tank, vertical cylinder tank, rectangle tank; And PVC/FRP, PP/FRP, PVDF/FRP composite tanks.
