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AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE

FRP_GRP_GRV_GRE_pipe
  • FRP_GRP_GRV_GRE_pipe
  • ASTM D2996 GRP-FILAMENT WOUND
  • GRE PIPE
  • GRP-REINFORCED RIB
  • GRP-INSULATED 2
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • GRP-Anticorrosive-Pipes-Alphaplast-Glass-Fiber-Reinforced-Plastic
  • GRE MARINE & OFFSHORE PIPELINE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
  • AWWA C950,ASTM D2310,ASTM D2996,ASTM D3517,ISO10639,ISO14692,BS5480 GRP/GRE PIPE
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Product Description

Glass Reinforced Polyester/Epoxy Pipes (GRP/GRE)

Filament Wound Piping

Filament Wound GRP/GRV Piping use thermosetting polyester & vinyl ester resin as the matrix, and glass fiber and its products as the reinforced materials, and are formed through the Computer numerical computer controlled winding process.

I. Product performance features

  Corrosion resistance: good resistance to water, acid, alkali, and salt of general concentrations, and various oils and solvents.

  Light weight: excellent physical properties, lightweight, high strength: gravity -1.9, 1/4 weight of ductile iron, 1/10 weight of steel, while the tensile strength is close to steel, up to 400MPa.

  Long, effective service-life materials, up to 50 years.

  Smooth inner walls, absolute roughness of 0.0084, the flow rate through pipes is 15% to 20% higher than other pipes of the same diameter.

  Ease of joining, high construction efficiency, reducing installation time.

  High technology design, Tight & efficient joints design, no wall scaling, no secondary pollution to water quality.

II. Wide application areas

  Due to the high cost performance of GRP/GRV Piping, their applications areas are very wide, and they have been widely used in electric power, environmental protection, municipal construction, petrochemicals, marine vessels, and other areas.

III. Product specifications

  ◆Diameter: DN15 - DN5000 mm;

  ◆Pressure Rating: 0.1 - 2.5Mpa;

  ◆Stiffness Class (N/m²): SN2500 - SN15000;

  ◆Standard length: 6m,12m;

  Other design pressure, stiffness, non-standard length of pipes can all be customized.

IV. Connection:

  O-ring seal bell and spigot(with & without key-lock), Adhesive bonded, Flange, Hand lay-up, etc.

V. Standard:

  AWWA M45 Manual of Water Supply Practices Fiberglass Pipe Design

  ANSI/AWWA C950  Glass Fibre Reinforced Thermosetting Resin Pressure

ASTM D 2310  Standard Classification for Machine-Made "Fibreglass" (Glass-Fibre-Reinforced Thermosetting-Resin) Pipe

  ASTM D2996 Standard Specification for Filament-Wound “Fiberglass”(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

  ASTM D3517 Standard Specification for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe

  ASTM D3839-2002 Standard Guide for Underground Installation of “Fiberglass” (Glass-Fiber Reinforced Thermosetting-Resin) Pipe

  ISO 10639 Plastics piping systems for pressure and non-pressure water supply-Glass reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin

  ISO 14692 Petroleum and natural gas industries-Glass-reinforced plastics (GRP) piping

  BS 5480 Specification for glass reinforced plastics (GRP) pipes joints and fittings for use for water supply or sewerage

 CSA Z662 is the Standard for the use of plastic pipe in Canadian oil and gas pipeline systems.
These revisions include the following:
- RCP Requirements for PE pipe,
- MRS Design Equation and PE 100,
- HDB Design Factor of 0.45,
- Plus Performance PE materials,
- CRS Methodology,
- Polyamide Materials and
- Reinforced Thermoplastic Pipe:Material of the pipe might be Polyethylene (PE), Polyamide-11 or PVDF and can be reinforced with Aramid or Polyester fibre.

  • GRP/GRV Process Pipeline

GRP/GRV Process Pipeline have good capacity of energy saving, because it have smooth Internal Wall which roughness≤0.0084. Therefore, compare with traditional pipe, we can choose smaller diameter pipe or lower power pump to transmit same flow. It also provides excellent corrosion resistance, long life, few maintenance cost. And it will not crack for cold medium and weather.

I. GRP/GRV process pipeline characters:

  High flow rate.

  Corrosion resistance: It is excellent for many chemical applications include strong acids, chlorine, salts and oxidizing agents that corrode transitional metal pipe.

  Good heat and cold temperature resistance: from -40°C to +150°C.

  Good insulation, thermal conductive and transparent property.

  Long life, up to 50 years.

  Light weight and high strength.

  Non-toxic : can be used for portable water.

  Pressure resistant: pipes and fittings are designed and fabricated according to the process requirement. Pressure test will be done at 1.5 times required pressure.

Ⅱ. GRP/GRV process pipeline Specifications

  Diameter: DN40-DN5000mm;

  Pressure class: 0.6MPa, 1.0MPa, 1.6MPa, 2.0MPa, 2.5MPa;

  Stiffness class: SN2500,SN5000, SN7500, SN10000 (N/m²);

  Standard length: 6m, 12m;

  Joint style: O-ring seal bell and spigot(with & without key-lock), Adhesive bonded, Flange, Hand lay-up, etc.

Ⅲ. GRP/GRV process pipeline Executive Standard:

  ANSI/AWWA C950 Fiberglass pressure pipe

  ASTM D3517 Standard Specification for Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe

  ASTM D2996 Standard Specification for Filament-Wound Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

  ISO 10639 Plastics piping systems for pressure and non-pressure water supply — Glass reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin

  ISO14692 Petroleum and natural gas industries – Glass-reinforced plastics (GRP) piping

  ASME B31.3 Process Piping

 

  • Insulating Piping

RP/GRV serves as internal pressure conveying pipe, the polyurethane, etc material serves as central insulator layer; GRP & Polyethylene pipe serves as the external protection layer. The excellent advantage for the polyurethane interlayer are cold resistant, heat insulation, light weight, big adhesive area with the outer protection pipe, uniform load transferring, good impact resistant, etc.

I. FRP Insulating Piping Characters:

  Lightweight, high strength, convenient transportation, installation and maintenance, the heavy lifting equipment is not required.

  Excellent hydraulic performance, smooth inner surface, small resistances for fluid, save the cost of pumping.

  No fouling on the inner surface, through long-time use, the smooth inner surface also can be kept.

  Low thermal conductivity, λ=0.26W/(m.k), excellent insulation properties, the temperature drop less than 0.5℃/km.

  Good chemical resistance and long life time can up to 30 years.

  Prefabricated insulation layer, saving installation time and cost than fabricated on the construction site.

Ⅱ. FRP Insulating Piping Applications:

  Thermal spring delivery pipe;

  City and factory heating system;

  Other heat medium feed pipe;

Ⅲ. FRP Insulating Piping Specifications:

  Diameter: DN50-DN2000mm;

  Pressure rating: 0.6MPa, 1.0MPa, 1.6MPa, 2.0MPa, 2.5MPa;

  Connection: inner pipe use spigot and bell (bonded or O-ring type) or flange, the outer pipe use bond joint.

  • Reinforced Ring Piping

I. Reinforced Ring GRP/GRV Piping Characters:

  Excellent chemical resistance;

  Light weight;

  High strength;

  Easy installation and maintenances;

  High flow rate;

  Short construction period;

  Low comprehensive investment;

  Algae growth prevention;

Ⅱ. Reinforced Ring GRP/GRV Piping Applications:

  Municipal, electricity, chemical industry, irrigation, water supply, drainage and sewage.

Ⅲ. Reinforced Ring GRP/GRV Piping Specifications:

  Diameter: DN1000-DN5000mm;

  Pressure class: 0.6MPa, 1.0MPa, 1.6MPa, 2.0MPa;

  Stiffness class: SN5000, SN7500, SN10000, SN15000 (N/m²);

  Joint style: O-ring seal bell and spigot(with & without key-lock), Adhesive bonded, Flange, Hand lay-up.

Ⅵ. Reinforced Ring GRP/GRV Piping Standards:

  ANSI/AWWA C950 Fiberglass pressure pipe

  BS7159 British Standard Code of Practice for Design and Construction of Glass Reinforced Plastic (GRP) Piping Systems for Individual Plants or Sites

  ISO14692 Petroleum and natural gas industries – Glass-reinforced plastics (GRP) piping

  ASTM D2996 Standard Specification for Filament-Wound“Fiberglass”(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

  • FGD Dedicated Piping

FGD Systems Dedicated GRP/GRV as its excellent performance, widely used in Wet Flue Gas Desulfurization Plants, such as: Spray pipeline, oxidation air tube, slurry pipeline, oxide air spray gun, strainer mesh, etc.

I. FGD Dedicated Piping Characters:

  Excellent corrosion resistance: Use epoxy vinyl ester resin can resist sulfur smoke and acid-base liquid.

  Good heat resistance: Use HDT=150℃epoxy vinyl ester resin,short-time heat resistance can reach 200℃.

  Good wear resistance: Add abrasion resistant filler in resin, both to increase interlaminar bonding force, but also reduces the internal and external roughness coefficient, especially in 15%-20% solid content slurry.

  Thermal shock resistance: avoid fracture, damage and delamination due to thermal shock under extreme changes in temperature.

  Winding process: Computer control winding process, greatly improve interlaminar adhesive properties.

Ⅱ. FGD Dedicated Piping Specifications:

  Design pressure: PN2.5, PN6, PN10;

  Working pressure: 0.5, 1, 2, 3bar;

  Safety factor FOS: 1:6 or 1:10;

  Temperatures: from +50°C to +200°C;

  According to the following international standard: EN, ASTM, ASME, etc.

GRE Chemical-Industrial Pipeline use premium glass fiber glass as reinforced materials, epoxy resin as based materials, by computer control winding process, mechanical connected fiberglass reinforced piping.

I. GRE Chemical-Industrial Pipeline Characters:

  • Long Service Life

   • Low Life-Cycle Cost

   • Retrofit Solution

   • Easy to Install

   • Light Weight

   • Corrosion Resistant

Ⅱ. GRE Chemical-Industrial Pipeline Specifications:

   Diameter: DN80-DN600mm & 3 inch-24 inch;

   Length: 9m/12m;

   Working Temperature: up to 100℃;

   Pressure Rating: 1.6MPa-10.0MPa & 240 PSI-1500 PSI;

Ⅲ. GRE Chemical-Industrial Pipeline Applications:

   Potable water, firewater mains, saltwater cooling, saltwater disposal, heating & cooling water systems and wastewater systems across the automotive, power generation, municipal, institutional and aerospace applications.
Ⅵ. GRE Chemical-Industrial Pipeline Standards:

   ASTM D2996 Standard Specification for Filament-Wound Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

   API 15LR Specification for low pressure fiberglass line pipe and fitting

   ASTM D5685 Standard Specification for Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe Fittings

   ASTM D4024 Standard Specification for Machine Made Fiberglass (Glass-Fiber-Reinforced Thermosetting Resin) Flanges

Ⅴ. GRE Chemical-Industrial Pipeline Connection: Thread, Adhesive Bonded, Bell/Spigot O-RING (with & without key-lock), Flanged, etc.

 

RE Marine & Offshore Pipeline, Using high quality epoxy resin as matrix and high strength glass fiber as reinforcement, and are formed onto a mold through the computer controlled winding process, after the final heat curing forming a stable performance of finished pipe and fitting.

I. GRE Marine & Offshore Pipeline Characters:

  Durable and corrosion resistant: highly resistant to corrosion caused by saltwater, chemicals, residues and bacteria. Similarly, it resists external corrosion even in aggressive marine environments.

  Light weight - Easy to install: weighs only a quarter that of steel of pipes and is easy to install without the need of heavy installation equipment.

  Low Installation and Operating Cost: Installation costs are lower than those for carbon steel, resulting in comparable total installed cost when product costs are factored in. Lower operating costs, due to superior hydraulic performance, reducing energy costs.

  Wide range of systems: offering a complete range of piping systems in a variety of diameters and pressure classes for many different applications. Piping systems are available in diameters up to 40 inch and standard lengths up to 40 ft.

  No contamination: not rust or scale and is resistant to marine fouling. These features also contribute to the cost savings and reduced needs for maintenance.

Ⅱ. GRE Marine & Offshore Pipeline Applications:

  Ballast, bilge, fuel, cleaning, ventilation, cooling, fireproof and other piping systems;

Ⅲ. GRE Marine & Offshore Pipeline Specification:

  Sizes: 1.0 to 40 inch (DN25-DN1000mm);

  Length: 30feet/9m, 40feet/12m;

  Pressure rating: Maximum 50BAR/725PSI;

  Working Temperature: Maximum 120℃/250℉;

Ⅵ. GRE Marine & Offshore Pipeline Standards:

  IMO A.753 (18) “ship plastic pipe guide Guidelines for the Use of Plastic Pipes on Ships

  ISO-14692 “Petroleum and natural gas industries —Glass-reinforced plastics (GRP) piping”

  UKOOA-1994 “Specification and recommended practice for the use of GRP piping offshore

  ASTM F1173 “Specification and recommended practice for the use of GRP piping offshore

  ASTM D2996 “Standard Specification for Thermosetting Resin Fiberglass Pipe Systems to Be Used for Marine Applications

  ASTM D2992 “Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass”(Glass-Fiber-Reinforced Thermosetting-Resin) pipe and fittings”

  ASTM D1599 “Standard Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe. Tubing and Fittings

  API 15LR “Specification for Low Pressure Fiberglass line Pipe and Fittings

 

GRE Wear-Resistant Pipeline is a new generation polymer composite piping, which use GRE as outer layer, PU as inner layer. Outer layer not only can bear inner pressure, but also can resist external corrosion; the inner PU layer is a wear-resistant layer. Through the unique interface process, centrifugal casting process, the PU layer can firmly bonded on the inner surface of the outer GRE layer.

Polyurethane Elastomer(PU)is a multi-function high molecular synthetic material between rubber and plastic, which is excellent in mechanical property. It is much superior to common rubber in its tensile strength, elongation at break, fracture resistance. It keeps its high elasticity within a wide range of rigidity, so it is excellent in wear-resistance and mechanical shock resistance, and can be prescribed into various polyurethane formula system according to the actual application condition. It is now widely used as wear-resistant and erosion-resistant lining in the fields of power, coal, mine, building, chemical etc, which serves to transmit grinding particles and corrosive agents like coal powder, lime-ash, mineral powder, mortar, and aluminum liquid etc.

GRE Wear-Resistant Pipeline combine the advantages of GRE and PU, it is excellent in wear-resisting, aid resisting, alkali resisting, anti-scaling, radiation resistant, hydrolysis resistance, high elasticity, mechanical shock resistance and other comprehensive performances.

I. GRE Wear-Resistant Pipeline Characters:

  Excellent corrosion resistance and prominent wear- resistance.

  Less running resistance, excellent anti-scaling.

  Good connection and controlled thickness of wear-resistant layer.

  Light, convenient to transport and install, low cost.

Ⅱ. GRE Wear-Resistant Pipeline Applications:

  Widely used in dredging, electric power, mining, coal, chemical industry to transport mud sand, coal power, ash mineral power, liquid aluminum and mud grinding particle materials and corrosive medium.

Ⅲ. GRE Wear-Resistant Pipeline Specifications:

  Diameter: DN100 - DN600mm;

  Length: 6m/12m;

  Maximum Operating Temperature: 80 ℃;

  Pressure Rating: 1.6MPa to 10.0MPa;

  Connection: Thread, Bell and Spigot, Flanges, Plain-End joint, choosed according to design requirements.

Ⅵ. GRE Wear-Resistant Pipeline Standards

  ASTM D2996 Standard Specification for Filament-Wound Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

  API 15LR Specification for low pressure fiberglass line pipe and fitting

  BS EN 1465 Adhesive determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies

 

GRE Membrane Pressure Vessels (MPV Membrane Housing) are made of high quality GRE and use an advanced winding process. MPV include high strength, smooth inner surface and durable shell.

Producing Process: Filament Winding→Cutting nap→Hydraulic test→Spray coating treatment→Package.

Quality Assurance:

  100,000 times cycle test;

  Burst test with 6 times of its operating pressure;

  100% QA test with 1.25 times stage elevation of hydraulic pressure;

  100% QA inspection and cleaning before final packaging and delivery to customers.

I. GRE MPV Characters:

  Excellent and reliable internal quality;

  Excellent insulation properties;

  Outstanding corrosion resistance;

  Safe and reliable design;

  High-quality supporting components;

Ⅱ. GRE MPV Applications:

  HYDRANAUTICS; DOW; GE; FLUID SYSTEM; TORAY; CSM; VONTRON; BDX and other international standard membrane elements.

Ⅲ . GRE MPV Specifications:

  4 inch Length customers can request the choice 1,2,3,4(core)

  8 inch Length customers can request the choice 1,2,3,4,5,6,7(core)

  Operating Pressure: 300psi(2.1MPa), 450psi(3.1MPa), 600psi(4.1MPa), 800psi(5.5MPa), 1000psi(6.9MPa) , 1200psi(8.3MPa).

  Working Temperature: from -10℃ to +50℃.

Ⅵ. GRE MPV Standards

  ASME Boiler & Pressure Vessel Code (BPVC)

  NSF Standard 61 

Specifications︰Glassfiber Reinforced Plastics (GRP) Pressure Pipes are used for drinking water and hydropower pipelines as well as for other applications.

Physical Properties
Nominal Diameter [DN] 150 - 3600 mm
Nominal Pressure [PN] up to 32 bar
Nominal Stiffness [SN] up to 20000 N/m²

GRP Pipe Material
Glass fiber reinforced plastics (GRP) are a composite consisting of at least two different materials. The benefits of each material are united to achieve an overall effect.

A binder or matrix and reinforcing material is commonly used to combine the physically differing raw materials. Their molecules do not bond but they form a composite by joining their boundary layers. What is important is that the constituents are compatible in terms of properties and processing. This technology originated in the aviation and marine industry where particularly light high-performance materials are required.

Pipes made of centrifugally cast glassfiber reinforced plastics (GRP) consist of a combination of thermosetting plastics such as for example unsaturated polyester or vinyl ester resins, chopped glass fibers and reinforcing agents. The standard wall structure ensures that the individual materials bring their special features to bear in the finished composite.

UNI9032 Pipes in glass-reinforced thermosetting resin (GRP)
UNI9033 and/or mortar pipes used in any application.
ASTM D 2996-88 Filament-Wound Reinforced Thermosetting Resin Pipe.
ASTM D3262-88 Reinforced Plastic Mortar Sewer Pipe
ASTM D3754-88 Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin Sewer and Industrial Pressure Pipe
ASTM D3517-88 Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin Pressure Pipe
AWWA C950-95 Standard for Glass-Fiber-Reinforced Thermosetting-Resin Pressure Pipe.
BS 5480-90 Specification for Glass fiber reinforced plastics (GRP) pipes and fitting to use for water supply or sewerage
ASTM D3262 Gravity Sewer
AWWA C950 Fiberglass Pressure Pipe
AWWA M45 Fiberglass Pipe Design Manual
SASO-1577 Gravity Sewer
SASO-1578 Pressure Sewer
ASTM D3839 and Appendix AWWA C950-95 in relation to the inspection standards buried
ISO 10467 Plastics piping systems for pressure and non-pressure drainage and sewerage – Glassfiber reinforced plastics (GRP) systems based on unsaturated polyester (UP) resin
ISO 10639 Plastics piping systems for pressure and non-pressure water supply – Glassfiber reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
ISO 25780 Plastics piping systems for pressure and non-pressure water supply, irrigation, drainage or sewerage – Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin – Pipes with flexible joints intended to be installed using jacking techniques
EN 1796 Plastics piping systems for water supply with or without pressure – Glassfiber reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP)
EN 14364 Plastics piping systems for drainage and sewerage with or without pressure – Glassfiber reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) – Specifications for pipes, fittings and joints

Stiffness Classes
SN 2500 These pipes are suitable for buried installation, but are mainly used for relining.
SN 5000 Pipes of this stiffness are selected for minor loads, for example when installed in mixed soil at a depth of 3 m and a live load corresponding to a
60 t truck.
SN 10000 These pipes are designed for high loads, for example for installation in mixed soil at a depth of 4 m or a live load corresponding to a 60 t truck with little soil cover.
SN >10000 For special cases pipes can be produced with stiffnesses up to well over 500,000 N/m², e.g. for landfill or well pipes.
Please contact your local HOBAS Sales Representative for more information.

SN...Nominal Stiffness in N/m²

GRP Pipe Systems Benefits
High corrosion resistance
Leak-tight system for maximum loss-free flow
Low weight and simple push-on couplings enable high installation rates even in less accessible and demanding terrain
Very smooth inner pipe surfaces minimize friction and pressure loss and simplify hygienic measures
Variable lengths as pipes can easily be shortened on site
High stiffness classes available
Angular deflection possible in couplings
Installation possible irrespective of weather conditions
Single source system solution including manholes and fittings
Consistent high quality tested by in-house and third party specialists (testing of material properties, pressure tests, etc.)
High abrasion resistance
UV resistance
High structural load capacity
Compatibility with other materials
Low operating and maintenance costs
Service life of more than 50 years

Corrosion Resistance
Pipes do not conduct electricity and are not susceptible to attack caused by acids, alkalis and salts.

train Corrosion Test
A test used to determine how GRP pipes will react in the field is the strain corrosion test, which checks for stress corrosion cracking. Specimens are subjected to both physical (structural design) and chemical (medium) loading, i.e. the pipe is held in a deflected state in a sulfuric acid solution. The results of the standardized test according to ASTM 3681/3262 (American Society of Testing Materials) are conclusive because it is conducted on a pipe section on a scale of 1:1. It therefore reflects practical applications under more extreme conditions as closely as possible without requiring unnecessary tests for individual criteria that can also be contradictory in the case of composites.

Hydraulic Properties
GRP pipes have excellent hydraulic flow characteristics with significantly lower friction losses than other products of similar dimensions. Not only are the hydraulic properties favorable, the smooth resin rich inner lining provides protection against highly corrosive media and the internal surface is not prone to tuberculation and encrustation.

Pipes have the following hydraulic roughness values.

Roughness Coefficients for Pipes
Colebrook-White k 0.01
Hazen-Williams C 155
Mannings n 0.008-0.01
As a result, less energy is required to transport the liquid through the pipe. The amount of energy saved (pressure pipes) is an important aspect that has to be taken into account regarding the cost-effectiveness of a pipeline system. Given the smooth seamless liner, sludge deposits and incrustations are minimized. Maintenance and cleaning costs are therefore kept low and the planned pipeline is more efficient right from the outset.


The FRP pipe is consist of inner layer, Structural layer and outer layer. Its characteristics are:

1. Lightweight, high strength and high stiffness, its density is 1.5-1.9, equals one fifth of steel pipe, one fourth of cast steel pipe and three fourth of pretensioned concrete pipe(PCP).

2. Corrosion-resistant property. The Corrosion-resistant property of FRP pipe is mainly relied on the inner resin, and it can be selected based on the condition of the media.

3. Good hydraulic property. The inner surface of the FRP pipe is very smooth, its friction coefficient (f) is 0.000915 after performed the relative testing, the water conservancy factor (c) can be kept within 145 and 150 during a long period.

4. health property. For the pipe which be used for transporting the potable water, the food grade resin will be used. It has been approved by the relative national sanitary authority.

5. Shock resistance. It doesn’t occur delamination and cracking under the condition of deformation of 25%.

6. Abrasive resistance. The inner surface is made of one kind of resin with good abrasive resistance, so it can improve the abrasive resistant property of the FRP pipe.

7. Low temperature resistant property. There will not be cracking under the condition of -40℃ and the strength doesn’t decline.

8. It can be used for different kind of environment, such as beach, benthal, river, mountain area, marshland, desert and plain etc.

Product Image

FRP_GRP_GRV_GRE_pipe
FRP_GRP_GRV_GRE_pipe

ASTM D2996 GRP-FILAMENT WOUND
ASTM D2996 GRP-FILAMENT WOUND

GRE PIPE
GRE PIPE

GRP-REINFORCED RIB
GRP-REINFORCED RIB

GRP-INSULATED 2
GRP-INSULATED 2




GRP-Anticorrosive-Pipes-Alphaplast-Glass-Fiber-Reinforced-Plastic
GRP-Anticorrosive-Pipes-Alphaplast-Glass-Fiber-Reinforced-Plastic

GRE MARINE & OFFSHORE PIPELINE
GRE MARINE & OFFSHORE PIPELINE








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