PN Flanges
Your Professional PN Flanges Supplier
Our goal is to be your true partner in PN Flanges field in China.We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
-
Ss Weld Neck FlangeStandard: BS4505, GOST12820-80, DIN, UNI, EN1092-1 TYPE 11, SABS/SANS, AS, ISO, API, BS Tables D,E, F and H etcread more
Pressure Rating: PN6 / PN10 / PN16 / PN25 / PN40/PN63
Size Range: DN15 –... -
Socket Weld Pipe FlangeCharacteristics of Socket Weld Pipe Flange (SW Flanges):read more
1.Compact Design: Socket Weld Pipe Flanges are designed for smaller pipe sizes, making them suitable for applications with limited... -
BSPT Threaded FlangeThread Standard: BSPT — BS 21 / ISO 7-1read more
Thread Angle: 55° (Whitworth form)
Flange Standard: EN 1092-1 / DIN 2566 / ASME B16.5 (on request))
Face Types: Raised Face... -
Stainless Steel Lap Joint Flange1. Ease of Installation: Stainless Steel Lap Joint Flange are designed for easy installation by sliding them over the pipe, which simplifies assembly.read more
2. Alignment Tolerance: Stainless... -
Spectacle Blind Flange Ring Spacer Flange1.NPS:DN15-DN3000,1/2"-120" 2.Pressure Rating:Class150-Class2500,PN10-PN160 3.Material: ①Stainless Steel: 31254, 904/L, 347/H, 317/L, 310S, 309, 316Ti, 321/H, 304/L, 304H, 316/L, 316H...read more
Why Choose Us
Product application
Our products are widely used in power plants, nuclear power, petrochemicals, natural gas, military, municipal infrastructure, metallurgy, construction, pharmaceuticals, papermaking, coal mining, cement production, pollution control, environmental protection and energy conservation.
Production equipment
We have more than 120 equipment, demonstrating our strong production capacity and commitment to high-quality production. The rich product line enables us to efficiently meet various project needs and maintain a competitive advantage in the industry.
One-stop service
Inquiry-quotation-sample-order-production-delivery-after-sales service.
Sales team
Well-trained and experienced - quick response - smooth communication - timely quotation - perfect solution.Working with us will give you peace of mind.

Advantages of PN Flanges
Safe and reliable sealing
Flanges provide a strong and reliable seal between pipes and equipment, preventing leaks and ensuring safe operation.
Easy assembly and disassembly
Flanges allow for quick and easy connection and disconnection of pipes, making maintenance and repairs more efficient.
Durable and reusable
Flanges are typically durable and can be reused multiple times, making them a cost-effective solution.
High pressure and temperature resistance
Flanges are designed to withstand high pressures and temperature changes, making them suitable for various industrial applications.
Simplified maintenance
Flanges simplify maintenance by allowing for easy access to pipes and equipment.
Compatibility and flexibility
Flanges can be used to connect pipes of different diameters, materials, and pressure ratings, offering flexibility in system design.
Standardized design
Pressure nominal flanges are standardized, ensuring consistent performance and interchangeability across different manufacturers.
Reduced risk of loosening
Flange connections are less likely to loosen compared to traditional hydraulic fittings, especially in severe service applications.
Versatile applications
Flanges are used in various industries, including industrial plants, petrochemical facilities, water treatment plants, shipbuilding, and the oil and gas industry.
Applications of PN Flanges
Flanges are used to securely and firmly bring together pipes, valves, pumps, or other equipment at a joint. Some important functions provided by flanges are:




Connection
Flanges allow for the assembly of components at a joint. One flange is mounted onto the outer circumference of the pipe or equipment, while the other flange is mounted at the opposite side of the joint. They are securely connected using bolts and nuts, ensuring a reliable connection.
Durability
Flanges provide resistance against pressure, temperature, and other forces within the system. High pressures or temperature changes between pipelines or equipment can be effectively accommodated due to the solid connection provided by flanges.
Sealing
Flanges are used to achieve sealing at the joint. Gaskets or sealing materials at the joint prevent unwanted leaks of liquids or gases within the pipelines. This is important for safe operations and environmental protection.
Ease of assembly and maintenance
Flanges allow for easy assembly and disassembly of pipes or equipment. When repairs, maintenance, or modifications are needed, the parts can be quickly separated and reassembled using flanges. This provides a significant advantage for production continuity and efficiency.
Flexibility
Flanges enable transitions between different pipe diameters, pressure classes, or materials. They are used at joints of different components or systems to bring together various elements and ensure compatibility.
Flanges are widely used in industries such as industrial plants, petrochemical facilities, water treatment plants, shipbuilding, and the oil and gas industry. In these sectors, flanges are considered a critical component to provide a secure and solid joint, ensure sealing, and facilitate easy assembly or maintenance.
Product Description
|
Material |
Carbon Steel |
ASTM A105, LF2, CL1 / CL2 |
|
16MN,20#, WPB |
||
|
Stainless Steel |
ASTM A182, F304 / 304L, F316 / 316L,A182F317/317L,A182F310,F321,F347,316Ti |
|
|
Alloy Steel |
ASTM A182 A182 F12,F11,F22,F5,F9,F91,F51,F53,F55,F60,F44,F304H,F316H,F317H,F321H,F347H,INCONEL 600,625,825,etc. |
|
|
Standard |
ANSI/ASME B16.5 |
Class 150 Flanges-Class 2500 Flanges |
|
DIN |
6Bar 10Bar 16Bar 25Bar 40Bar 63Bar |
|
|
JIS |
5K Flanges-30K Flanges |
|
|
EN1092-1 |
6Bar 10Bar 16Bar 25Bar 40Bar 63Bar 100Bar |
|
|
Type |
1. Plate Flange 2. Flat Flange 3. Slip on Flange 4. Welding Neck Flange 5.Long Welding Neck Flange 6. Blind Flange 7. Socket Welding Flange 8. Thread Flange 9. Screwed Flange 10. Lap Joint Flange. etc. |
|
|
Connection Type |
Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue, Groove, Small-Tongue, Groove, etc |
|
|
Size |
1/2"-100",SCH5S-SCH160S,XS,XXS,STD |
|
|
Heat Treatment |
Normalizing, Annealing, Quenching Tempering |
|
|
Applications |
Water works, Shipbuilding industry, Petrochemical & Gas industry, Power industry, Valve industry,and general pipes connecting projects etc. |
|
|
Surface |
Transparent anti tust oil,yellow anti rust oil,black paint,or clients request |
|
Delivery
|
Selling units |
Single item |
|
Single package size |
20X15X10 cm |
|
Single gross weight |
15.000 kg |
Lead Time
|
Quantity (pieces) |
1 - 200 |
> 200 |
|
Lead time (days) |
20 |
To be negotiated |
Packaging & Shipping
Customized Packaging
We accept customized packaging, can print your logo or brand on the label and box.
Export Packaging
We use export cartons/steel frames for packaging, and put marks on them to protect long-distance transportation.
Shipping
For large-volume orders: We cooperate with several international freight companies to provide you with the best shipping services.
For samples and small-volume orders: We ship via international express companies such as TNT, FedEx, UPS and DHL.

FAQ
Zhejiang Chengjiu Pipeline Co., Ltd. is one of the most professional pn flanges manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade pn flanges from our factory. For price consultation, contact us.
flange type 05, stainless steel ceiling flange, pn flanges