Flange
Flange Manufacturer
As a professional Flange Manufacturer, From standard dimensions to custom-engineered solutions, our flanges are forged with precision and compliant with international standards including ASME, EN, DIN, and JIS.
Flange Specifications
|
Product Name |
Flangeend/Coupling/Nipple/Union/Bushing/Plug/Pipe Fittings |
|
Type |
Elbow, Tee, Reducer, Tube Flange,Ball valve. Butterfly valve etc. |
|
Material |
Stianless Steel, Nickel Alloy |
|
Standard |
GB,AISI,ASTM,DIN,EN,JIS |
|
Grade |
Stainless steel 304 / 304L / 310S / 316L / 316Ti / 316LN / 317L / 904L / 2205 / 2507 / 32760 / XM-19 / S31803 / S32750 / S32205 / F50 / F60 / F55 / F60 / F61 / F65 etc |
|
Specification |
Standard: OD: DN15~2000 |
|
Nonstandard:Can be customized |
|
|
Packaging |
Waterproof polybag, wooden box |
|
Inspection |
ISO,SGS,BV and so on |
|
Application |
Chemical, Pharmaceutical & Bio-Medical, Petrochemical & Refinery, Environmental, Food Processing, Aviation, Chemical Fertilizer, Sewage Disposal, Desalination, Waste Incineration etc. |
Complete Range of Flange Types
We supply a full range of flange types designed to meet different pressure levels, temperature conditions, and installation requirements.
Weld Neck Flange
Designed for high-pressure and high-temperature systems. The tapered hub structure improves strength and reduces stress concentration.
Slip On Flange
Simple structure and easy installation. A cost-effective solution for low-pressure applications.
Blind Flange
Used to seal the end of pipelines. Ensures safe operation during inspection or system expansion.
Socket Weld Flange
Suitable for small-diameter pipelines. Provides strong connection in high-pressure environments.
Threaded Flange
No welding required. Ideal for special conditions where welding is not permitted.
Lap Joint Flange
Used with stub ends. Allows easy alignment and frequent dismantling.
Applications
Our flanges are widely used in critical industries where safety and reliability are essential.
Each application requires strict quality control and precise engineering to ensure long-term performance.
Flange Material Grades Comparison
| Material | Strength | Corrosion Resistance | Temperature Range | Typical Use |
|---|---|---|---|---|
| Carbon Steel (A105 / LF2) | High | Low | -29°C to 425°C | General industrial pipelines |
| Stainless Steel (304 / 316 / 316L) | Medium–High | High | -196°C to 600°C | Chemical, marine, food industry |
| Alloy Steel (F11 / F22 / F91) | Very High | Medium | 0°C to 600°C+ | Power plants, refineries |
| Duplex Stainless (2205 / 2507) | Very High | Very High | -50°C to 300°C | Offshore, seawater systems |
| Low Temperature Steel (LF3 / LTCS) | Medium–High | Medium | -196°C to 150°C | LNG, cryogenic pipelines |
Selection Guide Flow Table
|
Working Condition |
Recommended Flange |
|
High pressure + high temperature |
Weld Neck + Alloy Steel |
|
Low pressure + low cost |
Slip On + Carbon Steel |
|
Corrosive environment |
Stainless Steel + RTJ |
Manufacturing Capability
Advanced equipment and experienced engineering teams ensure stable product quality and efficient delivery.
Forging and heat treatment
CNC machining
Precision finishing
Large-scale production capacity
Quality Assurance & Testing
Quality is the core of our manufacturing process. Every flange undergoes rigorous inspection before shipment:
Dimensional Inspection
Ensuring 100% compliance with requested tolerances.
Material Testing
Chemical Analysis (PMI), Tensile Strength, and Impact Testing.
Non-Destructive Testing (NDT)
Ultrasonic Testing (UT) and Magnetic Particle Inspection (MPI).
Certification
All products are supplied with EN 10204 3.1 Mill Test Certificates (MTC).
FAQ
Can flanges be manufactured according to custom drawings?
Yes. We provide OEM and custom flange manufacturing based on technical drawings, including non-standard sizes, special materials, and customized facing types.
What international standards do you follow for flange production?
We manufacture flanges according to global standards, including:
ASME B16.5, ASME B16.47, DIN EN 1092-1, JIS B2220, and GOST.
This ensures compatibility with international pipeline systems.
What is the typical lead time for flange orders?
For standard products, production time is usually 7–15 days.
Custom or large-volume orders may require additional lead time depending on specifications and quantity.
Do you provide third-party inspection before shipment?
Yes. Third-party inspection such as SGS, BV, and TUV can be arranged upon request. We also provide material test certificates (MTC EN10204 3.1).
What is the difference between weld neck and slip-on flanges?
Weld neck flanges are welded to the pipe and provide higher strength and fatigue resistance, making them suitable for high-pressure systems. Slip-on flanges are easier to install and are used in lower-pressure applications.