UPVC Flange

UPVC Flange comes in a variety of shapes and sizes, and they’re easy to mix up. PVC flanges and UPVC flange are both made of PVC (Polyvinyl Chloride), but they have distinct qualities and are thus better suited to different uses.

We are well-known for our UPVC Flange Manufacturer, producing, and providing with best price in India. Our educated personnel using modern technology and the highest quality primary material to manufacture these flanges following industry quality standards.

To ensure that the customer’s requirements are met, the provided UPVC flanges fittings are quality-checked against several industry-standard characteristics.

UPVC Flange Details

Size (Inch) → Nominal Pipe Size (in inches)
ID → Inner Diameter
OD → Outer Diameter
WT → Wall Thickness
SL → Socket Length
H → Height
L → Length
PCD → Pitch Circle Diameter

Size (Inch)	ID (mm)	OD (mm)	WT (mm)	SL (mm)	H (mm)
½”	21.64	29.10	3.73	22.23	42
¾”	26.97	34.79	3.91	25.40	58
1″	33.78	42.88	4.55	28.58	66
1¼”	42.55	52.25	4.85	31.75	80
1½”	48.72	58.88	5.08	34.93	90
2″	60.78	71.86	5.54	38.10	115
2½”	73.56	87.58	7.01	44.45	132
3″	89.50	113.74	7.62	47.63	150
4″	114.99	132.11	8.56	57.15	182
6″	153.88	168.10	7.11	77.25	250

Parameter	Specification / Typical Value
Product	uPVC Flange
Material	Unplasticised Polyvinyl Chloride (uPVC)
Manufacturing Process	Injection moulded
Colour	Grey / White (manufacturer dependent)
Surface Finish	Smooth, non-porous
Joint Type	Bolted flange with gasket
Flange Face	Flat Face (FF)

1. Strong and Reliable Connection

Upvc flanges provide a robust mechanical joint capable of withstanding high pressures, temperatures, and mechanical stresses. When paired with appropriate gaskets and bolting, they offer secure sealing in demanding applications.

2. Versatility in Application

Upvc flanges are available in a variety of materials, sizes, and pressure ratings, making them suitable for use in different industries and environments. Common materials include carbon steel, stainless steel, and alloy steel.

3. Ease of Assembly and Disassembly

Unlike welded joints, flanged connections can be quickly assembled or disassembled without cutting the pipe. This is particularly useful for systems that require regular maintenance.

4. Variety of Designs

Different Upvc flange types, such as weld neck, slip-on, blind, socket weld, lap joint, and threaded, cater to specific operational needs and installation methods.

5. Pressure and Temperature Resistance

Upvc flanges are designed according to standards that define their allowable pressure-temperature ratings, ensuring safe operation under specified conditions.

6. Customization Options

Upvc flanges can be manufactured with special dimensions, facing types, or coatings to meet unique customer requirements.

Standard Pressure Classes

Pressure Class	Maximum Working Pressure @ 20 °C	Typical Standard
PN 6	6 bar (0.6 MPa)	DIN / ISO
PN 10	10 bar (1.0 MPa)	DIN / ISO / BS
PN 16	16 bar (1.6 MPa)	DIN / ISO / BS

Temperature Derating (Typical)

Temperature (°C)	Allowable Pressure (% of PN)
20	100%
30	~80%
40	~65%
50	~50%
60 (max)	~40%

Property	Typical Value	Remarks
Material	Unplasticised Polyvinyl Chloride (uPVC)	Rigid thermoplastic
Density	1.38 – 1.45 g/cm³	Lightweight compared to metals
Colour	Grey / White / Blue	Manufacturer dependent
Surface Finish	Smooth, non-porous	Reduces friction and scaling
Hardness	Shore D 80 – 85	Rigid and durable
Tensile Strength	45 – 55 MPa	At 23 °C
Compressive Strength	≥ 60 MPa	Suitable for flange bolting pressures
Impact Strength	Moderate (brittle below 0 °C)	Handle carefully in cold climates
Elastic Modulus	2.5 – 3.2 GPa	High stiffness for structural stability
Coeff. of Thermal Expansion	5–8 × 10⁻⁵ /°C	Important for expansion considerations
Water Absorption	< 0.1%	Negligible swelling or dimensional change
Thermal Conductivity	~0.14 W/m·K	Low heat transfer
Operating Temperature	0 – 60 °C	Short-term up to ~80 °C
UV Resistance	Moderate	UV protection recommended for outdoor use
Electrical Conductivity	Insulating	Electrically non-conductive
Chemical Resistance	Excellent for acids, alkalis, salts	Poor resistance to organic solvents

Benefits of UPVC Flange

1️. Excellent Corrosion Resistance

UPVC is naturally resistant to rust, scaling, and chemical corrosion.
Ideal for water supply, wastewater, and chemical pipelines.
Extends system life compared to metal flanges in corrosive environments.

2️. Lightweight

Much lighter than steel, cast iron, or ductile iron flanges.
Reduces handling effort, transport cost, and pipe support stress.
Easier to install in tight or elevated spaces.

3️. Cost-Effective

Lower material cost than metal flanges.
No requirement for painting, coating, or anti-corrosion treatment.
Reduces total installation and maintenance costs.

4️. Smooth Internal Surface

Ensures low friction flow, reducing energy loss and pressure drop.
Minimises fouling, scaling, and sediment buildup in the pipeline.

5️. Easy Installation & Maintenance

Simple bolted connection with standard gaskets.
Can be easily dismantled for inspection, cleaning, or replacement.
No welding or special tools needed.

6️. Chemical Resistance

Resistant to acids, alkalis, salts, and most aqueous chemicals.
Safe for potable water and chemical transport.
Performs well in industrial and irrigation applications.

7️. Good Mechanical Strength for Cold Service

Suitable for pressures PN6, PN10, PN16.
Operates reliably up to 60 °C.
Provides stable performance under normal pipe stress.

8️. Low Noise and Vibration Transmission

Plastic material dampens vibration and reduces noise in pipelines.

9️. Environmentally Friendly

Recyclable material.
Long service life reduces replacement and waste.

Types & Common uses of UPVC Flange

Types of UPVC Flange

Weld Neck Flanges: Weld neck flanges feature a long tapered hub that reinforces the connection, making them suitable for high-pressure and high-temperature applications.
Slip-On Flanges: Slip-on flanges have a slightly larger diameter than the pipe they connect to and are slipped over the pipe before welding. They are commonly used in low-pressure and non-critical applications.
Socket Weld Flanges: Socket weld flanges have a recessed area (socket) into which the pipe end fits, allowing for fillet welding. They are suitable for small-bore piping systems and applications with moderate pressure and temperature requirements.
Blind Flanges: Blind flanges are solid discs used to close the end of a piping system or vessel. They are often used for pressure testing or as a permanent seal when a pipe end needs to be closed off.

Uses of UPVC Flange

Oil & Gas — high-temperature steam, crude oil transfer, sour gas, offshore platforms, refinery units, and high-pressure pipeline systems. Weld neck flanges and RTJ faces are commonly used due to pressure and sealing requirements.
Chemical Processing — aggressive fluids, acids, and corrosive environments. Stainless steel and alloy flanges are selected for chemical compatibility, often with raised-face (RF) and gasketed sealing.
Power Generation — steam lines, turbine systems, cooling loops, and boiler circuits. High-temperature and cyclic loading require forged flanges and higher pressure classes.
Water & Wastewater Treatment — lower pressure distribution systems and pumping infrastructure. Slip-on flanges and flat-face flanges are widely used along with resilient gaskets.
HVAC and Building Services — chilled water networks, fire suppression systems, hydronic loops, and pump rooms. Flanged joints simplify installation and maintenance.
Shipbuilding & Marine — seawater cooling lines, fuel systems, hydraulic lines, and deck machinery. Marine flanges require corrosion resistance and reliable sealing under vibration.
Industrial Machinery & OEM Equipment — compressors, blowers, heat exchangers, filters, and skids often employ flanged interfaces for modular assembly.

Why Choose Petron Thermoplast ?

Petron Thermoplast had high-quality upvc flanges that depend on precise manufacturing, quality materials, and adherence to standards. Working with a trusted manufacturer like Petron Thermoplast ensures upvc flanges that deliver consistent performance in demanding environments. With experience in producing standard and custom designs, Petron Thermoplast provides solutions tailored to the needs of diverse industries worldwide.

UPVC Pipe Fittings

We offer UPVC Pipe Fittings products in all standard sizes and provide complete customization options to meet your specific project requirements across our entire product range.