PP Reinforced Flange Backing Ring
Henan Lukuang Industry Co., Ltd. also supplies PP reinforced full-plastic flange backing rings for plastic piping systems.
The reinforced structure is designed to provide mechanical support for bolted flange connections while maintaining the lightweight and corrosion-resistant characteristics of polypropylene.
Glass-fibre-reinforced PP backing flanges are commercially used in metric piping systems and can be manufactured with connection dimensions based on standards such as ISO 7005 and EN 1092. Some designs are also available for ANSI/ASME Class 150 connections.
Available Options
- ✅PP reinforced full-plastic backing ring
- ✅PP-coated steel backing ring
- ✅Metric flange configuration
- ✅ANSI / ASME Class 150 configuration
- ✅PN10 configuration
- ✅PN16 configuration
- ✅Customized bolt-hole patterns
- ✅Customized dimensions
- ✅OEM production
HDPE Flange Connection
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PP flange backing rings can be used together with HDPE flange adaptors or stub ends to create a detachable connection between an HDPE pipeline and equipment such as:
- ✅Valves
- ✅Pumps
- ✅Water tanks
- ✅Steel pipelines
- ✅Ductile iron fittings
- ✅Other flanged equipment
A typical connection consists of:
HDPE Pipe → HDPE Stub End / Flange Adaptor → Gasket → PP Backing Flange → Bolts & Nuts → Mating Flange
The flange backing ring itself does not normally provide the primary sealing surface; the compatible stub end/flange adaptor and gasket form the sealing interface.
Applications
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Water Supply
PP flange connections are suitable for selected HDPE and thermoplastic water supply systems, including municipal and industrial water pipelines.
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Irrigation
The lightweight construction makes PP flange components convenient for agricultural and commercial irrigation systems where detachable pipe connections are required.
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Wastewater Treatment
PP flange systems can be used in compatible wastewater and drainage piping systems where corrosion resistance is required.
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Chemical Processing
PP's chemical resistance makes it suitable for selected chemical handling systems. Material compatibility should be confirmed according to the specific chemical medium and operating temperature.
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Industrial Piping
PP flange connections can be used to connect plastic pipelines with valves, pumps, tanks and other industrial equipment.
Available Materials
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PP
Standard polypropylene construction for compatible thermoplastic piping applications.
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Reinforced PP
Reinforced polypropylene provides increased structural rigidity compared with unreinforced PP and is suitable for flange backing applications.
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PP-Coated Steel
For projects requiring a steel structural core combined with a PP protective layer, PP-coated steel backing flange options can also be supplied according to requirements.
Note: PP, reinforced PP and PP-coated steel are different product constructions. Please specify the required material when requesting a quotation.
Standards
Our PP flange solutions can be supplied according to different international connection standards, depending on product design and application.
Metric Standards
- ✅ISO 7005
- ✅EN 1092
- ✅DIN 2501
ASME / ANSI Standards
- ✅ANSI/ASME B16.5 Class 150
- ✅ASTM D4024 where applicable to the selected flange system
Different standards have different bolt-hole patterns, dimensions and pressure classifications. Please specify the required standard when requesting a quotation.
Industry examples also show reinforced PP-steel backing flange products being offered with ISO 7005, EN 1092, DIN 2501 and ASME/ANSI B16.5 Class 150 connection dimensions.
How to Select the Right PP Flange
When selecting a PP flange or backing ring, we recommend confirming the following information:
1. Pipe Outside Diameter
For example:
63 / 75 / 90 / 110 / 160 / 200 / 250 / 315 / 400 mm
2. Pressure Rating
Common options include:
PN10 / PN16 / Class 150
3. Flange Standard
For example:
EN 1092 / ISO 7005 / DIN 2501 / ASME B16.5
4. Pipe Material
Please specify whether the pipeline is:
HDPE / PP / PPH / PPR / ABS / UPVC
5. Connection Type
Specify whether the flange will be used with:
- ✅HDPE stub end
- ✅PP stub end
- ✅Valve
- ✅Pump
- ✅Tank
- ✅Steel flange
- ✅Ductile iron flange
Providing this information helps us recommend the appropriate flange configuration.
Custom PP Flange Solutions
Henan Lukuang Industry Co., Ltd. can provide customized PP flange and backing ring solutions according to project requirements.
Customization can include:
- ✅Outside diameter
- ✅Inside diameter
- ✅Bolt-hole quantity
- ✅Bolt-hole diameter
- ✅Bolt-circle diameter
- ✅Flange thickness
- ✅Pipe OD
- ✅Pressure rating
- ✅Drilling standard
- ✅Material
- ✅Color
- ✅Product marking
- ✅Packaging
For customized orders, customers can send us a technical drawing, flange drawing or pipe connection specification for confirmation.
Quality & Manufacturing
We focus on supplying plastic piping products for international water, infrastructure and industrial applications.
For each PP flange project, product selection should consider:
- ✅Raw material
- ✅Dimensions
- ✅Pressure rating
- ✅Connection standard
- ✅Pipe outside diameter
- ✅Application environment
- ✅Operating temperature
- ✅Chemical compatibility
The final product specification should be confirmed before production, especially for customized flange dimensions or non-standard drilling patterns.
Why Choose Henan Lukuang Industry Co., Ltd.?
Henan Lukuang Industry Co., Ltd. supplies plastic pipes, fittings and related pipeline products for international customers and project applications.
For PP flange and flange backing ring projects, we can provide:
- ✅Multiple sizes
- ✅Metric and inch configurations
- ✅PN10 and PN16 options
- ✅ASME Class 150 options
- ✅PP and reinforced PP solutions
- ✅PP-coated steel options
- ✅Customized dimensions
- ✅Customized drilling patterns
- ✅OEM supply
- ✅Project-based quotations
- ✅Matching plastic pipe and fittings
Our team can help customers select suitable flange specifications according to pipe diameter, pressure rating, connection standard and application.
FAQ
What is a PP flange?
A PP flange is a polypropylene-based flange component used to create a detachable bolted connection in compatible thermoplastic piping systems.
Can PP flanges be used for HDPE pipes?
Yes. PP or reinforced PP backing flanges can be used with compatible HDPE flange adaptors or stub ends to create detachable HDPE pipe connections.
What is a PP flange backing ring?
A PP flange backing ring is a flange component installed behind a compatible plastic stub end or flange adaptor. It provides the bolted connection to a mating flange, valve, pump or other equipment.
Are PP flanges corrosion resistant?
Polypropylene has good resistance to many corrosive chemicals and is widely used in compatible fluid-handling applications. Actual chemical compatibility should be checked for the specific medium and operating conditions.
What sizes are available?
Our supplied specifications cover sizes from DN25 to DN600, with the main product range covering DN50–DN400. Customized sizes may also be available.
Do you supply ASME Class 150 flanges?
Yes. ASME/ANSI Class 150 configurations are available for applicable PP flange products. The exact dimensions and drilling pattern should be confirmed before ordering.
Can you customize the flange?
Yes. We can customize dimensions, drilling patterns and other specifications according to technical drawings and project requirements.
Can you supply matching HDPE fittings?
Yes. Henan Lukuang Industry Co., Ltd. can also provide compatible plastic pipe and fitting solutions for HDPE and other thermoplastic piping systems.
Request a Quote
Looking for a PP flange manufacturer or PP flange supplier for your next piping project?
Please send us:
Pipe OD:
Nominal Diameter:
Pressure Rating:
Flange Standard:
Material:
Required Quantity:
Application:
Henan Lukuang Industry Co., Ltd. will provide the corresponding product specification and quotation.
Please send your request to the email address:sales@mfgpipe.com (We will respond to you within 24 hours).
