GRP FRP Pipes Sea Water Pipe Series DN 400

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100 pc
Supply Capability:
10000 pc/month

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Features & Benefits of GRP FRP pipe sea water pipe series

Corrosion-resistant

•Long, effective service-life materials

•No need for linings, coatings, cathodic protection, wraps or other forms of corrosion protection

•Low maintenance costs

•Hydraulic characteristics essentially constant over time

Light weight

(1/4 weight of ductile iron; 1/10 weight of concrete)

•Low transport costs (nestable)

•Eliminates need for expensive pipe handling equipment

Long standard lengths

(6, 12 metres)

Fewer joints reduce installation time

More pipe per transport vehicle means lower delivery costs

Extremely smooth bore

Low friction loss means less pumping energy needed and lower operating costs

Minimum slime build-up can help lower cleaning costs

Precision sealability

With elastomeric rubber rings

Tight, efficient joints designed for bell & spigot to eliminate infiltration and ex-filtration

Ease of joining, reducing installation time

Accommodates small changes in line direction without fittings or differential settlement

Flexible manufacturing

•Custom diameters can be process manufactured to provide maximum flow volumes with ease of installation for rehabilitation

lining projects

High technology pipe design

•Lower wave celerity than other piping materials can mean less cost when designing for surge and water hammer pressures

High technology pipe manufacturing system producing pipe that complies to stringent performance standards (AWWA, ASTM, DIN, EN, etc.)

•High and consistent product quality worldwide which ensures reliable product performance

Control Testing of GRP pipe sea water pipe series

Raw Materials

Raw materials are delivered with vendor certification demonstrating their compliance with Zhongfu Lianzhong quality requirements. In addition, all raw materials are sample tested prior to their use. These tests ensure that the pipe materials comply with the specifications as stated

Physical Properties

The manufactured pipe’s hoop and axial load capacities are verified on a routine basis. In addition, pipe construction and composition are confirmed.

Finished Pipe

All pipes are subjected to the following control checks:

• Visual inspection

• Barcol hardness

• Wall thickness

• Section length

• Diameter

• Hydrostatic leak tightness test to 1.5 rated pressure (only PN6 and above)

On a sampling basis, the following control checks are performed:

Pipe stiffness

Deflection without damage or structural failure

Axial and circumferential tensile load capacity

Thickness and Weight of Standard Pipes based on Internal Pressure of GRP pipe sea water pipe series

1. Internal liner (thickness 1.0 – 2.0 mm)

   In tables bellow thickness include 1.5mm of liner and minimum pipe Stiffness 1250 Pa

2. Mechanical resistant layer in glass filament winding (based on internal pressure)

3. Top coat (0.2 – 0.3mm) . In tables bellow thickness include 0.2mm of top coat


GRP FRP Pipes Sea Water Pipe Series DN 400

UnloadingHandlingTransportation and Storage of GRP pipe sea water pipe series

Unloading and Handling Pipes

Unloading the pipe is the responsibility of the customer. Be sure to maintain control of the pipe during unloading. Guide ropes attached to pipes or packages will enable easy manual control when lifting and handling. Do not drop, impact, or bump the pipe, particularly at pipe ends.

If at any time during handling or installation of the pipe, any damage such as a gouge, crack or facture occurs, the pipe should be repaired before the section is installed.

Transporting Pipes

Strap pipe to the vehicle over the support points using pliable straps or rope. Never use steel cables or chains without adequate padding to protect the pipe from abrasion. Bulges, flat areas or other abrupt changes of curvature are not permitted. Transport of pipes outside of these limitations may result in damage to the pipes.

Site Pipe Storage

It is generally advantageous to store pipe on flat timber to facilitate placement and removal of lifting slings

around the pipe.

When storing pipe directly on the ground, be sure that the area is relatively flat and free of rocks and other

potentially damaging debris. Placing the pipe on mounds of backfill material has been found to be an effective

way of site storing the pipe. All pipes should be chocked to prevent rolling in high winds.



GRP FRP Pipes Sea Water Pipe Series DN 400

GRP FRP Pipes Sea Water Pipe Series DN 400

FAQ of GRP pipe sea water pipe series

Q1: What’s the performance standards?

Lianzhong pipe is designed to meet all of these ASTM , AWWA, BS, DIN standards.

Q2: What’s the qualification testing for the products?

 Lianzhong pipe has been rigorously tested to verify conformance to the ASTM D3262, ASTM D3517, AWWA C950 and DIN 16868 requirements

Q3: How long can I receive my goods?

A: Usually, we will deliver products within 20 days after the contract is signed. Delivery time is negotiable when necessary.




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Q:What are the differences between inorganic FRP pipes and plexiglass pipes, what are the advantages and disadvantages?
Inorganic glass fiber reinforced plastic wind pipe: magnesium magnesite soil and glass fiber mesh cloth made of advantages: flame retardant shortcomings: large proportion, low strength
Q:The difference between FRP process tubes and GRP tubes
Process tubes are mostly pure glass steel, not sand, and sand pipe, of course, is added sand.
Q:What qualifications do FRP pipes need to export to Australia?
Need to comply with the local certification standards or international certification standards certification system
Q:What are the advantages of glass fiber reinforced plastic sand pipe than HDPE pipe?
Advantages of HDPE tubes:1. It is easy to form the closed anti-seepage system by butt welding and electrofusion welding. When laying along the trench, the excavation of the trench can be reduced and the amount of the fittings can be reduced.2 、 light weight and easy to install;3 、 strong abrasion resistance and excellent hydraulic performance, the buried pipeline can be protected without outer layer. The utility model can be applied to the earthquake and the soil subsidence area of the mining area, and can be laid on the bottom of the river by immersion method.4 、 chemical resistance, resistance to internal, external and microbiological corrosion, corrosion resistance, and health. The utility model is suitable for conveying acid and alkaline substances, conveying sewage, natural gas, gas and other substances;5, good environmental adaptability and frost resistance. It can be used in indoor and outdoor water supply pipelines.6, long service life, with more than almost 50 years of service life;7, easy to recycle
Q:What are the standards for FRP pipes?
As the glass tube between the use of double "O" type sealing ring way to connect, so each installation of a pipe, at the socket to suppress, in order to detect double "O" type sealing ring sealing effect.
Q:The difference between GRP cable duct and PVC cable pipe
The biggest difference is that the material is different, and the other areas of use are different
Q:What are FRP pipes made of?
Light weightThe weight of the pipe is only 1/4 of the same size and the same length as the ductile iron pipe, and 1/10 of the cement pipe. The transportation is easy to handle and easy to install.
Q:Why FRP pipe corrosion?
If it is ordinary water, generally does not count corrosion, there will be no obvious corrosion, long time began to soak rotten.
Q:Glass fiber reinforced plastic sand pipe backfill 5m, how much kg pressure?
You don't even know the pressure inside.
Q:FRP pipe and 0.7 thick galvanized pipe which cost is low?
Glass steel pipeline, FRP pipe and 0.7 galvanized steel pipe glass steel pipes cost is obviously low, FRP pipe material factory manufacturing costs and labor costs are relatively low, the price is only about the same thickness of galvanized pipe 60-70%, I hope you can help!

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